cant turn the boost up ?
 

sorry for spelling


i know its a bas set up but still should work ,


ls ecu ( broken p28)
00 y7 block , .20 over , 95 vtec jdm head,
set up is a t51 , 5psi external gate , 12-1 fmu will raise fuel pressure 12 psi for every 1 psi of boost ( please dont nock it i am saving for a chiped p28) stock map sensor , stock pump , stock injectors , but built bottom and head,
now on 5 psi the car will run ok , and just after i let out it will kinda spit and spudder , but i jsut have to re set the key and it will be fine again , now is the b/c the map is trying to read boost , but i can stay 100% throttle , now if i turn the boost up , i cant go more than 50 -75 % it will spit and spudder and kinda jump . but i dont think its fuel cut , is this the map sensor ?

but i had a stock old motor i wanted to blow up before this build , with no waste gate , and it would boost , with out the fum installed , 15 + before blowing a pipe off , i dont get it ? please dont laugh and bust on me about dont even drive it get it tuned bla bla , can this be the map ? or fuel pump ? :hithead:

why are honda people so fucking cheap?

for $195 you can get a hondata that will fix all this? tuning on a real dyno is about $400. dump the fmu since the stock pump and even a walbro will not repeatedly work past 100psi of fuel pressure, and then make your car run like soichiro honda intended.

a D with good engine management can do 200whp and live for a long time. if you look at what full race did for pinks, you can do WAY more as well, but it may not live as long.

but D blocks are cheap as shit ;-)

what is your question

A-fucking-men

well your first prolem is your on a stock ls ecu and you have a stock fuel pump and injectors! OF COURSE IT WONT RUN RIGHT!!!!!!!!!!!

man you guys are all assholes
i would go and buy a vafc and just add a lot of fuel till it smothes out while in turn lowering the rate of the fmu then turn the boost up to like 20lbs and set vtec at 2650 rpms
you should be good to go
it a secret some old school secret underground street racers use to this day

:thumbup:

well b/c its just a sohc and, not going to spent the $ on crap , but just cant fig out why before it would boost fine now with new turbo , it wont was looking at map sensor or fuel , or ecu , i have a 3 bar gm sensor 1000cc injecotors and a chiped p28 , 255 pump ,but that all for my b20 , just wanted so find out why all of a sudden , cant boost it ,

...

Fucking fail & aids.

haha exactly. wow those injectors are way too big

what exaclty is the question here. to little englisshhhh

I say 450cc injectors and a better fuel pump.
Then It might run reasonably?

weren't you selling this setup not long ago?

huh?

buddy ran a d15b7 with 10psi on a stock fuel pump, injectors and computer and did fine the only thing he had to do was get a different map sensor.

Sorry other thing could be if you have a tuned ECU when you put on new 1000cc injectors you didn't calculate in the size to the program and it's running them like it would say 240cc injectors which means WAY to much fuel

ta? taking anal?

lol...

also u need going to need a better map sensor im using a 4bar

goto to blocks or omini powers websites

wtf do u need 1000cc injectors for?

fuck, top secret shit here

but there is one compliant...

it's actually v-tech not vtec, get it right!

lol, if you had spent a lot of money building the motor why don't spend a little more to make sure it doesn't just blow up!

Is there a d series on the planet that needs 1000cc injectors?

It sounds like you're running out of fuel, but it's a little hard to make out what you're saying. I know you don't WANT to hear it, but tuning is your best bet because until you can put a wideband on it and tell what is happening when this sputtering is occouring. Is it leaning out? Fattening up? You need to sort out the cause of the misfire.

One other thing you might want to look into is, what are your spark plug gaps? It could simply be that when the boost starts getting up there, it's blowing out the spark because the gap is too big. Also, as cylinder pressures rise, that pressure creates more resistance to electrical flow, so the spark may simply not have enough current to jump the gap. I'd try gapping all the plugs down my .002" at a time, no more than about .010 than the stock setting, and see if that helps. If not, you've lost nothing and you've knocked one possibility off of the list.

stock map sensors only read vaccuum not boost so when you run boost threw them they freak out and your car runs like ass thats why you buy a hondata map sensor or be a cheap ass and buy a missing link so that your map sensor understands boost. and then get some decent size injectors.

couple things im having trouble with this post, for example:

a missing link makes your map sensor "understand" boost?

lol its called a "missing" link for a reason

actually your wrong. you can run a stock map sensor & up to .75 bar if I recall correctly... I'm running low boost with a stock map sensor @ no issues since it's tuned right.

yes you can but the ecu unless chipped to read the the "boost" pressure wont understand the reading...

cheap way... missing link... with the fmu reading the pressure through the vaccum lines it still adds fuel pressure... the missing link makes it so the map doesnt see boost... and your car doesnt trip out...

Call Locash, he'll tell you exactly what you need and dyno tune it for you.