b20 rev limits?

[HEADSHOT]

what is safe for a b20 to rev?? asuming i dont have the rotating assembly balanced?

id like to do a super high compression b20/vtec.... maybe.. depends on how high i can rev this thing and possible et's

[imm0rtal]

probably between 5500-6500rpm. It is a truck motor after all.

[HEADSHOT]

i think im gonna go anopther route then. figured as much

[DXE]

ive seen some b20z's on nonvtec.com
done up nice preety easy

you would have to get it sleeved, as their cylinder walls are super thin and crack very easy whatever you do

those guys were revving to 7.5 - 8 without breaking anything for a while

pushing out 170-180 hp to the ground with no vtec

this is a route not taken often but that you should definitely consider if your car is daily driven

sure someone can build a LS/Vtec and rev to 7.2 like a pussy
having a 2k power band sucks

building a b20z is a little different but here was my dream setup

PP the head, balance the crank shaft
sleeve the block
Crower 403 cams and entire valve train

from then its just regular I/E/H/CG

and GOOOD tuning

with a 2-3k setup you would be looking at 160-180hp to the wheels
and 1 badass ride thats totally unexpected

besides, with this kind of setup, your power band is between 3k-7k
with a b16 tranny it will pull like crazy

[noVtecHERE]

the stock motor has a rev limiter 6.600rpm if u want to rebuild it u can go to 7.8 but no higher without it being built nicely, if it is just a rebuild dont push it, and if u arent going to take it apart and rebuild it dont go past 7.4k

[allbossbra]

make the power spin it high dont wusss out.. just dont mis a shift like i did then the problems happen

[straywalker]

the stock redline people is 7200 same as an 90+ ls integra. The main concerns are the sleeves and the r/s ratio. I have had a b20/vtec for over 3 years now. tuned for n/a 3 years and now on the same block with the same stock internals boosted for 3 months on 14.5 lbs still holding very acceptable cylinder compression. If you decide to keep the b20 stock but would like to add only rod bolts (arp) the most common and trusted redlin over stock is 8K rpms. Assuming stock rods are being used. Yes the walls of a b20 are the thinnest of the b-series blocks but my belief is all in the tuning. Do some resarch on evans-tuning.com Might open ur eyes to a new perspective for b20 power, it has for me and so far so good!

[HEADSHOT]

im kinda looking for a budget, reliable drag car...yes i know the saying. cheap fast o reliable pick two.. id like to try to get a car to 13.5's.. so obviously im not looking for the fastest

[DXE]

then all you need is a stripped EF with LS turbo

end of story

[Mr.Burner]

I rev'd my allmotor 2.0L to 8500 with good tune and rod bolts for the longest time, never spun bearings, with tune and typeR cams, valve springs it made 168whp with 155tq. Then went turbo and cracked all the sleeves, but damn it was nice.

[HEADSHOT]

then all you need is a stripped EF with LS turbo

end of story

thanks for your worthless information.

[HEADSHOT]

I rev'd my allmotor 2.0L to 8500 with good tune and rod bolts for the longest time, never spun bearings, with tune and typeR cams, valve springs it made 168whp with 155tq. Then went turbo and cracked all the sleeves, but damn it was nice.

what kinda pistons were you running?

[DXE]

thanks for your worthless information.

eheheh well im just saying, your looking for a reliable but fast car for cheap

none of the options we have discuss so far are cheap

ls turbo is
and its preety damn reliable up to 8psi
i could GUARANTEE 13.5 or you money back lol

[HEADSHOT]

well i think ill be able to be reliable if i modify as little as possible. basically. a high compression b20 with stock internals hoigh compression pistons. and a vtec head. if i got good suspension and good tires.i think i should be able to do a pretty good et. no?

[MOD's Spell Checker]

the stock redline people is 7200 same as an 90+ ls integra.

earlier integras (90-91) had a lower rev limit of about 6800

i had a b20 nonvtec motor in my car and while it was being tuned was revved to 8k. though i had arp rod bolts

i had the rev limit set to 7500 but didnt go there that often

if i would have ported and polished the head i would have had around 180whp and 150 ft lbs. i got the head from some guy who thought he knew how to port heads and just messed with the exhaust side. ended up causing turbulance in the exhaust ports and dropped my torque curve after 5k faster than a drunken prom dates dress.

i ended up with 162whp and 142 ft lbs

btw, it was 11:1 cr, crower 404 cams with a Y1 lsd trans and i daily drove it getting about 20 mpg

[YewllowDA]

earlier integras (90-91) had a lower rev limit of about 6800

i had a b20 nonvtec motor in my car and while it was being tuned was revved to 8k. though i had arp rod bolts

i had the rev limit set to 7500 but didnt go there that often

if i would have ported and polished the head i would have had around 180whp and 150 ft lbs. i got the head from some guy who thought he knew how to port heads and just messed with the exhaust side. ended up causing turbulance in the exhaust ports and dropped my torque curve after 5k faster than a drunken prom dates dress.

i ended up with 162whp and 142 ft lbs

btw, it was 11:1 cr, crower 404 cams with a Y1 lsd trans and i daily drove it getting about 20 mpg

good stuff. yeah im planning on building a nonvtec b20 too.
what kind of pistons did you use?
are the rest of the bottom end stock excpet arp rod bolts?

[Mr.Burner]

what kinda pistons were you running?

Stock pistons fly cut.

[Mr.Burner]

the stock redline people is 7200 same as an 90+ ls integra. The main concerns are the sleeves and the r/s ratio. I have had a b20/vtec for over 3 years now. tuned for n/a 3 years and now on the same block with the same stock internals boosted for 3 months on 14.5 lbs still holding very acceptable cylinder compression. If you decide to keep the b20 stock but would like to add only rod bolts (arp) the most common and trusted redlin over stock is 8K rpms. Assuming stock rods are being used. Yes the walls of a b20 are the thinnest of the b-series blocks but my belief is all in the tuning. Do some resarch on evans-tuning.com Might open ur eyes to a new perspective for b20 power, it has for me and so far so good!

3months turbo?? dude it was less then a month, and that bitch smokes like a dog. 14psi on a gt28 is different then on a t3/t4 or /67.

[HEADSHOT]

remeber this is a na tech thread. im opnly interested in getting NA power out of a b20.


who makes pistons for the b20?

[Mr.Burner]

RS machine makes a typeR or ctr style piston 84.mm to fit the stock rod.

[CRX_N/a beast]

my b20 vtec is pretty much built still got stock b16 cams my b20 is not tune yet but my red line is at 9100 but i never take it tht high untill i get my cams and tune i keep it at 8 to 8200 for now and no problems at all

[Mr.Burner]

my b20 vtec is pretty much built still got stock b16 cams my b20 is not tune yet but my red line is at 9100 but i never take it tht high untill i get my cams and tune i keep it at 8 to 8200 for now and no problems at all

^^ did you use rod bolts?

[HEADSHOT]

RS machine makes a typeR or ctr style piston 84.mm to fit the stock rod.

what kinda compression do they run???

[DJ NeX]

LMAO, CTR pistons will run 14.9:1 compression. When will people realize that CTR pistons are not a good idea for street motors. And if you're gonna run that high of a compression, you should probably be running forged pistons anyways. CTR pistons are like detonation slugs.

ITR pistons on the other hand...JDM ones will run you 13.04:1 Which is a tad bit high, but the USDM ones will net you around 12.4:1

There figures are all based on the use of a b16 head with 3 layer head gasket, no milling of the head, and stock length b20/ls rods.

[Mr.Burner]

I run CTR pistons in my b16 with the head being milled 3 times and the block twice, with stock head gasket, and i have no problems with detonation, if you smooth out the tops on the pistons its fine. and its daily driven on the bottle well tuned.

but this still doesnt anwser his question. Just use typeR aftermarket pistons. and you'll be fine.

[DJ NeX]

I run CTR pistons in my b16 with the head being milled 3 times and the block twice, with stock head gasket, and i have no problems with detonation, if you smooth out the tops on the pistons its fine. and its daily driven on the bottle well tuned.

but this still doesnt anwser his question. Just use typeR aftermarket pistons. and you'll be fine.

yes, but you're using a b16, not a b20 with a b16 head my friend. B16's are really the only motors that I recommend CTR pistons on. Everything else is kinda dicey.

B16 w/ CTR pistons yields an 11.91:1 compression still fairly kosher by my standards.

[HEADSHOT]

what piston options are available for the b20? and what compression do they yield?

[DJ NeX]

well there's a myriad of custom pistons available.

as far as OEM goes..there's b20z and b20b pistons, and they both suck for NA powah!

Go with the ITR replicas from RS machine

[Type - O]

arias also makes some pistons to

[Mr.Burner]

yes, but you're using a b16, not a b20 with a b16 head my friend. B16's are really the only motors that I recommend CTR pistons on. Everything else is kinda dicey.

B16 w/ CTR pistons yields an 11.91:1 compression still fairly kosher by my standards.

oh dud! your right on that......forgot we're workin with a 2.0L

[HEADSHOT]

anyone know where i can get a short block from?

[mottrhed]

just curious on how you plan to use 81mm pistons in a 84mm bore. i could be wrong but i can do the aproximate piston to wall clearance in my head, and it seems like a little much.

anyway i knew a guy that ran a stock b20 bottom end with just rod bolts and a b16 head to 9k for 2 years(until he sold it) of daily driving and track use(ran 12.4 in a full 94 civic) and it never blew.

[DJ NeX]

just curious on how you plan to use 81mm pistons in a 84mm bore. i could be wrong but i can do the aproximate piston to wall clearance in my head, and it seems like a little much.

anyway i knew a guy that ran a stock b20 bottom end with just rod bolts and a b16 head to 9k for 2 years(until he sold it) of daily driving and track use(ran 12.4 in a full 94 civic) and it never blew.

the replica pistons that RS machine makes are OEM shaped but are 84mm bore. welcome to 2.0L

[noVtecHERE]

hahaha.. 2.0 FTL lol...

[noVtecHERE]

and i know stock SOHC civic running 14`s whats ur point some shits last some dont. dont be dumb...

[HEADSHOT]

just curious on how you plan to use 81mm pistons in a 84mm bore. i could be wrong but i can do the aproximate piston to wall clearance in my head, and it seems like a little much.

anyway i knew a guy that ran a stock b20 bottom end with just rod bolts and a b16 head to 9k for 2 years(until he sold it) of daily driving and track use(ran 12.4 in a full 94 civic) and it never blew.

dude use your head!

[b20forlife]

Well i had a b20 vted. the block was totally stock except for the fact that srd fly cut the pistons, and i had a b16 wit dual valve springs, retainers, and skunk 2 stage 2 cams. it was really fast and i reved it to 8500 constantly. i even had a 75 shot later on. it ran great with no problems. i ran 13.3 on my gutted eg and then ran 12.7 wit the nitreous. then i pulled and sold the motor caused i needed money. but the kid that owns it now still has the same motor runing wit no problems

[HEADSHOT]

Well i had a b20 vted. the block was totally stock except for the fact that srd fly cut the pistons, and i had a b16 wit dual valve springs, retainers, and skunk 2 stage 2 cams. it was really fast and i reved it to 8500 constantly. i even had a 75 shot later on. it ran great with no problems. i ran 13.3 on my gutted eg and then ran 12.7 wit the nitreous. then i pulled and sold the motor caused i needed money. but the kid that owns it now still has the same motor runing wit no problems

im thinking if i leave the crank alone... not even touch it. and throw some high compression pistons on it with arp rod bolts. then put a vtec head on it. with some itb's..then i should get a quick revving 2.0. this is going in an ef with stickey tires and good suspension. i think ill get some good times.


anyone know if a b20 will fit in an ef without chopping the hood???

[b20forlife]

i currently have a b20 vtec wit a stock crank but has eagle rods, wisco 12.1 compression pistons and a block guard. my bore is 84.5 an i have acl bearings and a port flow head on it. wit civic type r cams on 91 i made 220 whp. and it just rips the tires.

[DJ NeX]

220 on R cams is pretty good!

[MOD's Spell Checker]

i was using Endyn rollerwave mid compression pistons in mine 84.5mm

almost every piston manufacturer makes pistons for the B20

the stock rods were shotpeened and crank was stock

[onefst91hatch]

my buddy had a B20/vtec in a crx. stock bottom end with arp rod bolts, type r oil pump, and itr replica pistons(still cast not forged) from import power house, with a built B16 head. it made 238 hp with stock B16 cams and we spun that thing to 9500 all damn day every day for a good year then sold the car!! it ran 12.2. damn i miss that car. but anyways its all in the tune man!!

[YewllowDA]

my buddy had a B20/vtec in a crx. stock bottom end with arp rod bolts, type r oil pump, and itr replica pistons(still cast not forged) from import power house, with a built B16 head. it made 238 hp with stock B16 cams and we spun that thing to 9500 all damn day every day for a good year then sold the car!! it ran 12.2. damn i miss that car. but anyways its all in the tune man!!
thats nice revving the stock bottom at 9500 and not having any issues..

[onefst91hatch]

thats nice revving the stock bottom at 9500 and not having any issues..

for sure!

[MOD's Spell Checker]

id be suprised if that is true. ITR replica pistons wont fit in B20s. if they are 84mm pistons then they are just high compression pistons, replicas would be 81mm

i seriously doubt 238hp on stock b16 cams. thats dumb

[DJ NeX]

id be suprised if that is true. ITR replica pistons wont fit in B20s. if they are 84mm pistons then they are just high compression pistons, replicas would be 81mm

i seriously doubt 238hp on stock b16 cams. thats dumb

dude, you're a tard!

The replicas are made to 84mm and 84.5mm. I think I've spent enough hours doing calculations and research and experience to know what I'm talking about.

Don't talk about stuff you don't know. That's what Honda-tech is for.

[MOD's Spell Checker]

dude, you're a tard!

The replicas are made to 84mm and 84.5mm. I think I've spent enough hours doing calculations and research and experience to know what I'm talking about.

Don't talk about stuff you don't know. That's what Honda-tech is for.

BAHAHAHAHAH

so i dont know about building motors? i guess you dont know the meaning of the word "replica"

again.... to make 238 whp all motor on a b-series with STOCK b16 camshafts if fucking rediculous.

[HEADSHOT]

dude. dont dis on the henry.. im well aware of the type r 84.5mm pistons.. they do exist..

good bye

[MOD's Spell Checker]

dude. dont dis on the henry.. im well aware of the type r 84.5mm pistons.. they do exist..

good bye

they arent Type R pistons though... they are pistons that yeild a similar compression ratio but in a larger bore.

thats like putting h speed rated all season tires on your car and calling them type R tires since they are the same size as a type r

[onefst91hatch]

they arent Type R pistons though... they are pistons that yeild a similar compression ratio but in a larger bore.

thats like putting h speed rated tires on your car and calling them type R tires since they are the same size as a type r

NO!!! import power house carries a piston that is an ITR replica for the B20 block. it gives you the same performance gains as you would get from putting real ITR pistons in an LS. and i know they arent type R pistons. thats i why i said they are REPLICAS!!!! call Dave at import power house and ask him!!! Dave knows more than you ever will in your lifetime!!

[DJ NeX]

The replicas are literally an ITR piston shape that has been expanded to fit a larger bore such as 84mm.

End of discussion.

[onefst91hatch]

id be suprised if that is true. ITR replica pistons wont fit in B20s. if they are 84mm pistons then they are just high compression pistons, replicas would be 81mm

i seriously doubt 238hp on stock b16 cams. thats dumb

why is it sp hard to believe?? take a 2.0 block, bump the compression up to 12.5:1, with a fully ported and polished head done by import power house, and a whole day on a dyno!! how is that dumb. obviously if thats dumb then you dont know that much about building engines do you. i have seen Ls/vtec's make over 200 with stock honda parts. why cant a B20/vtec do it???? whos dumb now?? :whatever:

[onefst91hatch]

The replicas are literally an ITR piston shape that has been expanded to fit a larger bore such as 84mm.

End of discussion.

X2

[onefst91hatch]

anyone know if a b20 will fit in an ef without chopping the hood???

yes the only difference in the B20 from an Ls is the cylinder size. its no taller or anything like that. mine fit perfect!! and i could still run a strut tower bar!

[MOD's Spell Checker]

engines gain most of their power through the cams. if it doesnt have enough lift and duration it wont supply enough air at higher rpms (9500).

i understand the whole higher CR pistons in a B20... end of THAT discussion

i think that stock b16 cams can get some good power out of a B20, but if you pulled those cams out and put in some Rocket motorsport M22XX in that same motor, youd be seeing those numbers (238ish). with how little the lift and duration is on the stock B16 cams, i cant see them producing much more than 190 on a build head with high cr bottom end and big bore. but then what do i know.... ive NEVER researched anything about honda motors

[DJ NeX]

I can't see those cams making power to 9000+ myself as well. A 2.0L will peak earlier since its pumping in and out more air. B16 cams on my 1.8L 12.5:1 CR motor peaked @ like 7500, I can only imagine that those cams would peak around 7 with a 2.0L

[onefst91hatch]

engines gain most of their power through the cams. if it doesnt have enough lift and duration it wont supply enough air at higher rpms (9500).

i understand the whole higher CR pistons in a B20... end of THAT discussion

i think that stock b16 cams can get some good power out of a B20, but if you pulled those cams out and put in some Rocket motorsport M22XX in that same motor, youd be seeing those numbers (238ish). with how little the lift and duration is on the stock B16 cams, i cant see them producing much more than 190 on a build head with high cr bottom end and big bore. but then what do i know.... ive NEVER researched anything about honda motors

well you can think what you think. but as with everything, its all in the tune. im done arguing cuz i have ridden in this car many times, and talked to dave at import about it too when i went with my buddy to pick the car up. so i know what it was and dont need you telling me that its dumb and not possible. i have seen the dyno sheets and watched the car run 12.2 down the track. so im done with this thread! peace!

[MOD's Spell Checker]

where the engine peaks in power is determined by the cams. it all depends on how long the valves are staying open for and how far they open.

a larger engine will make more torque sooner because of the extra air that the engine can take in at lower rpms

im trying to think of a way to explain the duration part of it... but the percocet i just took a little bit ago kicked in and now i cant think straight...

so im done with this thread! peace!

Later!

[onefst91hatch]

but the percocet i just took a little bit ago kicked in and now i cant think straight...

lol thats funny! i want one!!
and i know how a cam works. i was surprised by the numbers as well. but all im trying to say is it happened so there is nothing left to argue about! i have been building engines for 10 years or more. but your thought are your thoughs!! lol

[MOD's Spell Checker]

lol thats funny! i want one!!
and i know how a cam works. i was surprised by the numbers as well. but all im trying to say is it happened so there is nothing left to argue about! i have been building engines for 10 years or more. but your thought are your thoughs!! lol

like i said in the very first comment about that motor, i would be very suprised.

you could say ive built my fair share as well

[GunnRulF]

spark racing also makes b20 pistons that can be used with OEM and aftermarket forged rods.

[b20civic]

I have a stock b20 bottom end with a b16 vtech head putting out 200 whp 189ftlbs and it just has butterfly cut pistons and rod bolts rev peaks at 8k

[Mr.Burner]

I have a stock b20 bottom end with a b16 vtech head putting out 200 whp 189ftlbs and it just has butterfly cut pistons and rod bolts rev peaks at 8k

No way its making 200hp stock bottom end........maybe 165hp 170tops stock.......
not possible......and deffinatley not to the wheels.

[cashflow]

x2

[b20civic]

took it to xact dyno after it was built and they tuned it for me and made three passes on it and it made 200 to the wheels so it happened. its all in the tuning

[azteamextreme]

post the dyno sheet

[joel602]

the stock redline people is 7200 same as an 90+ ls integra. The main concerns are the sleeves and the r/s ratio. I have had a b20/vtec for over 3 years now. tuned for n/a 3 years and now on the same block with the same stock internals boosted for 3 months on 14.5 lbs still holding very acceptable cylinder compression. If you decide to keep the b20 stock but would like to add only rod bolts (arp) the most common and trusted redlin over stock is 8K rpms. Assuming stock rods are being used. Yes the walls of a b20 are the thinnest of the b-series blocks but my belief is all in the tuning. Do some resarch on evans-tuning.com Might open ur eyes to a new perspective for b20 power, it has for me and so far so good!

Listen to this MAN !!! i saw his B20 and god was it fast !!!!! so what you been up to nate?

[Mr.Burner]

^I've driven his car.......its ok falls off hard at the top but its still an N/A thread.
^
^
^

[Mr.Burner]

took it to xact dyno after it was built and they tuned it for me and made three passes on it and it made 200 to the wheels so it happened. its all in the tuning

Key word you said "built"
there's no way you made 200hp on stock OEM parts just not going to happen, and gee Tim was the one who tuned my B20 w/typeR head, wasnt even close to 200hp. it made 170hp TO THE WHEELS.......
No Way No How On A Stock Motor!!! PERIOD....

dont need to see dyno sheets, cause it isnt happening on a stock motor....

[explode13]

hes lying my homie had a b20z with itr cams skunk2 manifold 70mm tb 350cc injectors ctr pulley itr headers 255 ful pump and only made 189 and tunned to spin to 10k fast but not making 200 to hit the 200 you need those pistons

[I Hate Import Cars]

Taylor, just be patient. My EG should be on the road with the new motor my March. Then you come and take a little ride and see what you think. Then I tell you what build it is, and you laugh at the idea and build one yourself. Then we race. ;) When do you get back anyway?

[1lowtacoma]

my brother has a semi built b20vtec look in some threads you can see the videos revs all day to 8500k fast little 4door i can pm ya specs if curious

[honduh_head]

my roommate had a b20/V, stock sleeves, with RS Machine ITR replicas, forged rods, mildly built B16 head, revved to 8500 daily, tuned on chrome, ran 13.80's in a full interior, caged EG on street tires...lasted two years then finally sold it. the kid he sold it to ran it low on oil and after 6 months it finally blew.