Turbochargind my D15B!!

[civic92jak]

Hey, i know a little about turbocharging but i have questions. I am lookin into turbocharging my D15B in my 92 Civic DX. I am currently thinking of running a T25 turbo. I was lookin to get about 7psi so i can stick with my stock pistons and valve train. As far as injectors go and fuel pressure, will i need to upgrade any of this or will it support a 7psi boost? Any and all info would be helpful.

 

[posol]

t25's are pretty small dude. I really wouldn't recommend it for any motor.

look for a small t3... like .42/.48 or something from a saab, or thunderbird or something.

while i'd recommend a larger turbo, here's what you need.

stock injectors, 12:1 FMU, missing link map bypass check valve
OR
dsm/etc 440-450cc injectors, resistor box if necessary, apex VAFC

while there are other options, you really don't need to go there for a small turbo on low boost.

 

[dohch22a4]

B, I think the T25 is fine for his application. Second gen DSM's run them on a 2 liter motor, and while I hate DSM's as much as the next guy, they do a pretty good job boosting at low psi.

 

[posol]

trust me... granted, its on a 2l, but they also run 14+ psi and make 200 hp.
they top out/stop making power at 5000 rpms. its just too small

 

[civic92jak]

Thanks, guys. I just was lookin for a turbo that could spool up fast but not to big for my app. I was hopin to stick with the stock pump and injectors. But if i gotta upgrade i will. If anyone could give me some models of T3's that you are recoommending would help me out. Keep the feedback comin.

 

[posol]

you can use your stock injectors with an FMU, but you're going to want to at least run an inline pump.

 

[civic92jak]

Ok, and i will have to disconnect my stock pump correct? Still need model numbers for the recommended turbos.

 

[civic92jak]

just wonderin as to why i have to run a FMU with a 12:1 disc in it when all i am runnin is 7psi. Wouldn't an 8:1 be the more realistic way to go. i am not lookin for balls to the walls power guys. Just a little pic me up.

 

[BigJ]

8:1 Is like 12-15 mpg blowing black smoke all the time rich mang.

 

[civic92jak]

true. alrighty, thanxs guys

 

[posol]

run a 12:1.

8:1 and 12:1 are fmu dics, NOT a/f ratios.

inline pumps works WITH your stock pump. that's why its called inline.

stock pump - - -- inline booster - - -- filter - - - rail - -- inj's - - - combustion

 

[Loco Honkey]

Hey B, ever run a T25 on a D15? I have. It's perfect. Use the T25.

 

[posol]

2 threads down you were saying that its too small too.. wtf

 

[civic92jak]

alright, thanks for the heads up pissedoffsol. Like i said, i know a little about it. and as far as the fmu disks, i though it was psi related.

 

[Seany-izzle]

Originally posted by pissedoffsol@Mar 9 2004, 01:30 AM
2 threads down you were saying that its too small too.. wtf

same thread you said that the t25 is a good turbo for a cx motor, which is a d15b. honkey said that its too small for a 2.2 litre.

 

[Loco Honkey]

Originally posted by pissedoffsol@Mar 9 2004, 12:30 AM
2 threads down you were saying that its too small too.. wtf

Too small for a 2200cc F22, but not too small for a 1500cc D15.

 

[Slo86GT]

Originally posted by pissedoffsol@Mar 8 2004, 02:10 AM


run a 12:1.

8:1 and 12:1 are fmu dics, NOT a/f ratios.

inline pumps works WITH your stock pump. that's why its called inline.

stock pump - - -- inline booster - - -- filter - - - rail - -- inj's - - - combustion

Little off there, man.

stock pump - - - filter - - - inline booster - - - rail - -- inj's - - - combustion

That's better.

You can mount the inline after the filter in the soft hose before the rail using some barb fittings.



As far as 8:1/12:1 disks are concerned, it has to do with boost pressure and fuel pressure.

The theory is that for every pound of boost over atmospheric that the FMU "reads". it adds 8 pounds of fuel pressure, which is 8:1.

So say you have a base fuel pressure of 38 PSI, and you boost 7 psi with an 8:1 disk. You'd be making 38 + (7 * 8) = 94 PSI of fuel pressure, which is too much for a stock pump to keep up with reliably. That's why you'd need the inline pump to help boost the flow capabilities at that high of fuel pressure.

 

[civic92jak]

thats what i thought, but like i said, don't know all that much. I just wanna run a 7psi boost on my stock D15B. What turbo would be good for this app? Some say T25 won't cut it, others say it will. Some say to use a T3. Some please confirm on what turbo i should use. And my a place where i can get the inline booster.

 

[civic15.8]

Originally posted by SiR Kid+Mar 10 2004, 06:04 AM-->

pissedoffsol

@Mar 8 2004, 02:10 AM



stock pump - - -- inline booster - - -- filter - - - rail - -- inj's - - - combustion

Little off there, man.

stock pump - - - filter - - - inline booster - - - rail - -- inj's - - - combustion

That's better.

You can mount the inline after the filter in the soft hose before the rail using some barb fittings.

:wacko: for a sec i thought i did mine wrong.