power loss
04-17-2003, 01:40 AM
#5
0.5 BAR
Thread Starter
Join Date: Mar 2003
Posts: 108
Re:power loss
93 civic d15b7
12:1 fmu
td05h
ignition retard by 2 degrees
front mount intercooler
dsm bov
custom charge pipes
vx manifold
2" downpipe
k well, if i floor it around 3000rpm in second its starts to backfire and surge i think its because there is too much fuel with my 12:1 FMU. But sometimes it just doesnt seem to have any pull, the engine revs up but it seems like im just running NA. The boost gauge shows that i running 8psi so it is not a vacuum leak. It just feels like my friends NA d16z6 could beat my car. Also i was thinking of building a better manifold for better flow, will this help with lower end power? also should i be using a 3" downpipe? my downpipe as of now consists of 3 different sizes of pipe, starts of with the stock talon pipe for about 5 inches then to a slightly smaller pipe, then to the stock downpipe, which bolts to the cat, which is also gutted. i have also heard it is not a good idea to have a gutted cat
i also read that for leaning out the Fuel under boost you can add a bleeder in the vaccuum line to the FMU, will this really work?
12:1 fmu
td05h
ignition retard by 2 degrees
front mount intercooler
dsm bov
custom charge pipes
vx manifold
2" downpipe
k well, if i floor it around 3000rpm in second its starts to backfire and surge i think its because there is too much fuel with my 12:1 FMU. But sometimes it just doesnt seem to have any pull, the engine revs up but it seems like im just running NA. The boost gauge shows that i running 8psi so it is not a vacuum leak. It just feels like my friends NA d16z6 could beat my car. Also i was thinking of building a better manifold for better flow, will this help with lower end power? also should i be using a 3" downpipe? my downpipe as of now consists of 3 different sizes of pipe, starts of with the stock talon pipe for about 5 inches then to a slightly smaller pipe, then to the stock downpipe, which bolts to the cat, which is also gutted. i have also heard it is not a good idea to have a gutted cat
i also read that for leaning out the Fuel under boost you can add a bleeder in the vaccuum line to the FMU, will this really work?
04-17-2003, 08:43 AM
#6
1.5 BAR
Join Date: Feb 2003
Posts: 828
Re:power loss
Was it running fine under lower boost? Is this a new problem with 8 pounds of boost? If so you are running out of fuel, I noticed you dont list larger injectors in your modifications, you have hit the limit that your stock injectors can flow in my opinion. Its time for a fuel upgrade, and get an air fuel guage.
04-17-2003, 11:26 AM
#8
1.0 BAR
Join Date: Jan 2003
Posts: 494
Re:power loss
You didn't say you have an inline or upgraded pump.... Your FMU is rising your fuel pressure around 96 PSI, and if you don't have a better than stock fuel pump, your fuel system won't be able to provide that much pressure. Your engine isn't getting enough fuel.
You should be careful running like this, if it is running lean, you can very easily blow your engine.
You should be careful running like this, if it is running lean, you can very easily blow your engine.
04-18-2003, 03:00 AM
#10
1.0 BAR
Join Date: Jan 2003
Posts: 422
Re:power loss
its still hard for us to tell what not alot of pull means to you.
could be running fine, and you want it to be as fast as a porsche turbo or someshit.
and thats why your like "aahh its not pulling hard"
or maybe its totally F'd up.
its hard for us to tell,
could be running fine, and you want it to be as fast as a porsche turbo or someshit.
and thats why your like "aahh its not pulling hard"
or maybe its totally F'd up.
its hard for us to tell,
