just came back from dyno
setup:
b18c5 ,
gsr camshaft
8.8:1 je piston,
sc44 precision turbo(60 trim,63 a/r),
inlinepro manifold,
3"downpipe--->exaust
cooler dim(core):24*7*2.75
at 10.5 psi i made 278.8whp 202.7 torque tuned
18psi i made359.3whp 255.1 torque untuned
at 20 psi i made 383.9whp 279 torque tuned (375.4whp untuned)
a/f ratio are perfect goes from12.5--->top end 12.3
i know that people make more whp at the same level boost @20 psi i was thinking that my intercooler is out of efficiency range
so what do you think?

 

I dont think its your intercooler its probably more related to your low compression. The intercooler should be able to flow that. It littler smaller than skyline core soi dont see why it shouldnt handle it.
Your low compression is probably lowring hte power compared to what others have. The 8.8 is very low compared to what we run..

Most people including my self run 9.8+ compression wiht the turbo and at the same boost its over 400 easily.

If you look at it most stock GSR at 7 psi are putting what you do at 10.5 psi

The compression definitely has something to do with it.




[Modified by b18bturbo, 3:10 PM 2/7/2003]

 

DOOD....8.8 JE piston, Eagle Rod

I was seriously praying for 400whp@10,000 rpm. On a serious note...I agree with V, the lower compression is probably what is causing you to need so much boost for that amount of power. Good numbers tho...

 

LOL
ok its not 8.8 they are 9:1 gsr piston but whit the b18c5 head you drop compression like .2 or something like that!!
anyway thx for your input

 

I think the remark was not made because of the compression, but the failure to pluralize piston.

 

Your compression is holding you back a little bit. But then again it's all about the tuning.

Who tuned it for you??

 

Well actually..for some of us that have been around a while....it was an old remark from FI....funny none the less.

 

I tuned my car, but like i said upper, i did get a perfect a/f mixture whit a 8-15whp more whit gears adjusting
aniway like you said compression is holding me a bit so guess what im going to do when rebuilt time come!

 

Hey, I say it looks good.

You have a nicely tuned car putting out some serious power - and it looks like your setup/tune should be pretty safe.

Congrats!

By the way, what are you using for engine management?

 

Despite popular opinion, I say 8.8:1-9.2:1 is GREAT street compression and every single turbo motor we did that makes supreme HP has 8.8:1 through 9.2:1 compression.

The dish piston is extremely efficient.

I think the HP you got was fine, I think that the answer to your question lies into the "extra's you can buy for your motor.

For example, if you bought the Venom Manifold for your car, you would probably gain like 30 WHP.

Also, do you know the CFM rating of your intercooler? It its over like 700 something, thats not the problem.

That turbo is not nec that large. Its not going to make super duper power because it just can't push the air.

Those are my thoughts. If I was closer to you, I could give you more direct counseling.

Also, its a 1.8 liter. Alot of the graphs you see and hear about are 2+ liters. A HUGE difference.

So I think your results are very typical of what you bought and paid for, so far.

Jeff

 

I would be happy too. Was the 10.5 psi run on pump gas?

 

... nice numbers!!!... i am hoping for similar results... btw, what are you using for engine management?...

 

what management are you running by the way??

 

I'd agree, 91 octane owns in cali.

 

venom manifold 30whp over the b18c5 manifold ???
if i change my turbo for a 60-1 compressor can i expect a huge diff at the same boost level?

 

You will get a increase in power, that's for sure.


However I have to disagree with the compression. I still stand very strong on 10:1 compression is best for the street. We have made excellent power on turbo motors with 10:1 compression as compared to lower compressions at the same boost levels with most of the other variables constant.

The popular opinion and internet myth is that you have to go with really low comperssion to be able to run turbo safely.

I find that Flat Top pistons work really well on my turbo setups.

Edit- Stop by my way, and I'll help you out, as much as I can.




[Modified by ekb18c, 5:47 AM 2/8/2003]

 

well said, thats what i have stock, and will keep till it blows

 

weven made 328 whp at 11.7 psi stock block stock internals. Completely stock. If u can tell me how i can get the pic of the dyno hosted for free ill post dynos...

 

and colin can make some crazy hp at 10:1. hes crazy him self

 

go to http://www.imagestation.com for free hosting of pics.

Also the 8.8 JE piston and eagle rod comment is an old joke from like 2 years ago.

 

is there a reason why you have missed this question 2 times?? what management are you using???

 

i dont think he s using any management mike.

prolly on a fmu/afc/smc..one of those controllers

 

thats what I'm guessing too Roby.

 

i don't know what he's using but with his set up those are the kinds of numbers you would see using 440's, 12:1 fmu, afc, and race fuel. the compression is definitely causing him to have to run those boost levels in order to make those numbers. obviously, with a stand alone and higher compression you would make more power @ those boost levels.

 

WERD.