2000GSRT

Here is my set up:
bone stock '00 b18c1
hondata s200b
rc 440's
revhard kit @ 10psi
2.5" exhaust all the way back (cat, resonator, es oval muffler)

I know my exhaust is a little restrictive, but I was kinda hoping for bigger #'s.
The thing is, I only made 205 hp @ 6psi and a 2.5" exhaust shouldn't be a restriction at that boost level.

Are these #'s normal? They seem a little low to me.
blue = 10spi
red= 6psi
green = 6psi baseline

Mr. Softee

#s are quite low, that is about how much hp an LS motor makes at those PSIs.

PrecisionH23a

Where is your air fuel curve at? It looks like right around vtec it REALLY needs fine tuning.

Mase

Could be better, but they arent all that bad.....

what trim turbo?

ineedhelp

i wouldnt say its that low. i think whats holding you back is the exhaust. i made about 270whp and 190lb @ 8psi with a drag kit useing the afc hack, with an n1 apexi exhaust(about 2.4 inches)
i say lose the cat and get a custom 3 inch exhaust system and youre good to go.


Modified by ineedhelp at 9:41 PM 2/22/2004

Spooled1.6L

what do you mean you wouldn't say its THAT low? Your telling him you made 70 MORE WHP at 2 less PSI lol

Mase

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spooled1.6L &raquo;</TD></TR><TR><TD CLASS="quote">what do you mean you wouldn't say its THAT low? Your telling him you made 70 MORE WHP at 2 less PSI lol</TD></TR></TABLE>

you mean 20 more whp at 2 psi less.

ineedhelp

considering he was held back because the restriction of his exhaust system, i would say its not that low.

2000GSRT

do you guys really think my exhaust is THAT restrictive.

I only made 205 @ 6psi. at that boost level I don't think a 3" exhaust would make much of a difference.

ineedhelp

i dont know how much more power youll make but, itll feel a lot better. as eveyone knows...the best exhaust system for a turboed car is no exhaust system....

but we cant have that...thats why the best next thing is a 3" exhaust system with NO cat good luck

Mase

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2000GSRT &raquo;</TD></TR><TR><TD CLASS="quote">do you guys really think my exhaust is THAT restrictive.

I only made 205 @ 6psi. at that boost level I don't think a 3" exhaust would make much of a difference.</TD></TR></TABLE>

no, your exhaust isnt that restrictive, I made 270 whp/229 ft/lbs at 10.5psi on my stock b18b (drag 3 kit w/ a smaller t04b turbo) w/ a greddy sp, and thats a really small exhaust

its probably a really conservative tune maybe?

FredoSP

Do a compression test, I'd like to know your #'s.

2000GSRT

wouldn't your boost guage give you an indication of how well your motors compression is by how much vaccum you are pulling? mine is usually between 18-21

808b18c1boosted

not always my vacuum reads 18 and i have 50% leak down in #4 cyl. and my compression is at 65psi on #4 and 130psi the rest.

Cramerox

whats the trim on the turbo?

kabaroo

you could try running open down pipe to see if the exhaust is holding you back.

2000GSRT

I'll try and find out what trim the turbo is and get a compression test done too.

Cramerox

well there could be alot of things you can also look at. Are you leaking boost? exhaust leak? I dont think your exhaust system is that restrictive....im just saying there could be other factors.

m R g S r

Those numbers look fine, just get some timeslips and if your not happy then upgrade.

FredoSP

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 808b18c1boosted &raquo;</TD></TR><TR><TD CLASS="quote">not always my vacuum reads 18 and i have 50% leak down in #4 cyl. and my compression is at 65psi on #4 and 130psi the rest.</TD></TR></TABLE>

yupp same with me, 3rd cyc was shot but I had a good vac, so as I said before do a compression test, it will tell you a lot.

b18b1hmtlove

you are missing about 20-40whp at 6psi and about 50whp at 10psi.

compression test is imperative as well as a leak down test. also it would be nice to get the AFR from the dyno. maybe their tune isnt too solid. I think if i was tuning your car and noticed about 20-50whp missing i would have given you atleast a compression test seeing it takes all of 10-20 mins.

also your exhaust is fine. a lil restrictive b/c you have the cat, resonator, and muffler, but nothing that should make you lose that much power.

also if its a revhard kit for that car, the turbo should be a .63/.60 t3/t04b. thats more or less a guess

2000GSRT

What's the difference between a leakdown test and a compression test and why do I need to get both?

Also the tuner wasn't using the dyno's wideband so the A/F ratio did not show up on the sheets. He used his own O2 sensor which screwed into where my primary O2 goes. I guess it's supposed to be more accurate that way.

mike1114

iTrader: (1)

I got a pretty stock GSR running hondata @10lbs 450ccc dsm injectors, t3/t4 .60/.63 a/r's. 2.5 inch dp and exhaust not cat. I dynoed at 261 and 174 tourqe.

My chart is choppy as hell!!

I thought my numbers were a little low, yours are a bit lower even, could be the cat that thing when you look at it gets so small in diameter inside!!!!!!

I did run a 13.3 with everything the way it its. In EK coupe. stock tires. spinning badin 1st, 2nd.

boosted_dc2

id ditch the cat for sure, and in addition the vtec point can be moved down to smooth out the curve in that area. that willl get you a little more HP as well.

Landon

Nextelbuddy

hey man great numbers they do seem a little low... i dont think it could be your exhaust ..... when i got tuned before i was running a stock b18c1 with a drag t3/t4 e turbo and @ 5 psi i made 260 to the wheels and @ 12 psi i made 326 wi the wheels and tha was with 2.25 in piping with 2.5 in down pipe with a CAT and muffler lol... so i know you can make some more power