turbotime

Ok so i am rebuilding for summer and my power goals are around 500-600whp on 16psi. I am running a drag t3/t4 turbo kit, with the spearco ic and drag mani. Engine is a built b17a1, stock sleeves, 9:1 CR. Although i realize i may have issues running 16psi on this setup (maxing out manifold, maxing out turbo (turbonetics says it maxes at 22psi), maxing out ic) i am still going to try and see what comes up on the dyno and then choose changes in the above listed things AFTER that.

My question is what size injectors should i run to make that kind of power? I want to remain as fuel efficient as possible so the correct sizing of the injectors is really important to me. I was running dsm450s but they max out at around 300 or so ive heard.

I was thinkin 770cc injectors, would this be good enough? Or is that a lil overkill? Also, what brand injectors? Rc? Saturated or Unsaturated?

Thanks

b18bturbo

780cc is gonna be too small go with 95lb 1000cc and that will be ideal for the 600hp goal you are setting

Adriano

1000cc injectors, walbro 255hp pump, an AFPR, and a fuel management should do. I dont think that turbo will make that much power specially at 16psi.

Adriano

turbo*s2k

1000cc injectors should be good for 500-600hp, but I don't see you hitting 500-600hp on a drag turbo kit. Your going to need a bigger turbo, and better manifold...

liam821

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Adriano &raquo;</TD></TR><TR><TD CLASS="quote">1000cc injectors, walbro 255hp pump, an AFPR, and a fuel management should do. I dont think that turbo will make that much power specially at 16psi.

Adriano</TD></TR></TABLE>

Agree. 1000cc injectors with a good fuel management setup. But that turbo kit wont put out those numbers, maybe 500whp at high 20s psi, but not 16psi. You need a bigger turbo for that, and maybe a new manifold and downpipe at the same time (if you are running the 2.5" drag downpipe).

liam

turbotime

yeah the manifold concerned me, and i suspected i may be pushing the turbo a lil past its limits.

My fuel setup currently is: walbro 255 hp, s200b, and b&m commandflo. Still using the oem fuel lines and fuel rail.

So 1000cc injectors seems to be the going recommendation. How bad will my mpg be effected by injectors this large?

If i just used 770cc injectors with all the same turbo/mani etc, what do u think the max power i could get would be?

liam821

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbotime &raquo;</TD></TR><TR><TD CLASS="quote">yeah the manifold concerned me, and i suspected i may be pushing the turbo a lil past its limits.

My fuel setup currently is: walbro 255 hp, s200b, and b&m commandflo. Still using the oem fuel lines and fuel rail.

So 1000cc injectors seems to be the going recommendation. How bad will my mpg be effected by injectors this large?

If i just used 770cc injectors with all the same turbo/mani etc, what do u think the max power i could get would be?</TD></TR></TABLE>

You gas milage wont change as long as the car is tuned correctly. The OEM fuel lines are good to around 600whp give or take with a walbro 255. 770cc injectors with enough fuel pressure with make ~500whp...

liam

99B16Si

your goals and ideas are in the right direction but you have A LOT more to upgrade in order to get close to 500whp. Most of the components on the drag kit are not designed for over 300whp....the injectors are a good start tho

SOHC_MShue

1000's for sure. Get it tuned and your gas mileage will be fine.

f1 vtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">1000's for sure. Get it tuned and your gas mileage will be fine. </TD></TR></TABLE>

i dont think that turbo will get u there ecspecially not on 16psi.

h22 civic

1000cc

turbotime

ok so the turbo i have wont make 500whp, then what will it make (guesstimate of course) on 16psi?

I am going to upgrade my manifold soon, i dont see that much more i need to upgrade other than the turbo/downpipe/manifold. I was thinkin a gt28 or gt35, but those are real expensive and i wont have $$ for them for months.

Think i could make 450whp with the current turbo?

I would just "upgrade" the whole topend of the exhuast (turbo, dp, manifold) but i been wastin all my $$ getting the engine workin again lol. Dropped valves cause much damage confucious say

oh yeah, and exhuast is the 2.5" drag downpipe with the reducer cutoff. That goes right into a 3" kteller exhuast.

booja

damn good luck on making 500whp at 16psi on a b17 with the turbos mentioned above

youre gonna need something bigger than a gt35 or a gt28. the t3/t4 will not do it for sure, on that turbo setup you have now at 16psi i say youd make around 320-340whp

im barely breakin 500whp on a h22 with a gt35 at 17.6psi...

youre gonna need to go with more boost

most b series vtec's around here ive seen make around mid 300's on 16psi... and thats if everything is going well

turbotime

really? i thought the gt35r was easily capable of those numbers? maybe im thinkin gt40r.

A big concern for me is the power/spool ratio.. i dont want to make 600whp if its only gonna be there from 7-8krpms. I would much rather make 450whp and have it from 5-8krpms.

So i guess that would bring me to my next question lol, what turbo sounds best suited for my goal? I think the gt28/gt35 would do that right? I know my current turbo, although it doesnt make nearly 300whp still hits full spool (10psi) right around 5krpms.

suggestions on turbo? if it came down to it id rather have 400whp and a shorter spool than 600whp and a long spool....

thanks again!

TurboGSR96

You aint going to do it with what you got, a GT35R with diff combinations is rated to 600+hp. I dont see you getting there without headwork and big injectors, your stock sleeves will be an issue at 20+psi, the boost level in which you are going to have to run to make that kind of power. You do not need to dish out that kind of money on a GT35R, a T3/60-1 is a good 500whp turbo and can be configured to make over 550hp with the right combination of wheels and housings

riceball777

theres really no way your going to get close to 500whp with that turbo and that manifold.
to make 500whp on only 16psi you need a really big turbo
most people with gt35's get about 400-450whp running pump gas at about 14-16psi. and 600+whp at 25+psi
you probably need like a gt40 to hit 500+whp on only 16psi

White Smoke

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbotime &raquo;</TD></TR><TR><TD CLASS="quote">really? i thought the gt35r was easily capable of those numbers? maybe im thinkin gt40r.</TD></TR></TABLE>

IT IS! He is only running 18psi, you need to add about 10psi to that to see the sick #'s

The 35r turbo does not even see efficiency till around 13-15 psi.

And you will never see 500HP at 16 psi even with a 42R on a street b-series.

booja

yeah i dont think there is anyway youre gonna reach 500whp on a b series without:

more than 16psi or
more displacement... alot more or
a HUGE turbo with MAJOR lag

JDM00SI

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99B16Si &raquo;</TD></TR><TR><TD CLASS="quote">your goals and ideas are in the right direction but you have A LOT more to upgrade in order to get close to 500whp. Most of the components on the drag kit are not designed for over 300whp....the injectors are a good start tho </TD></TR></TABLE>

turbotime

can someone recommend a turbo which balances power and spool time??

White_EK49

GT3082R drag kit

Full-Race Geoff

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White_EK49 &raquo;</TD></TR><TR><TD CLASS="quote">GT3082R drag kit </TD></TR></TABLE>

are you sure? have you tried that turbo?

Full-Race Geoff

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">
And you will never see 500HP at 16 psi even with a 42R on a street b-series.</TD></TR></TABLE>

i realize its apples to oranges, but my civic did 600 at 20 psi, street b series

komat

i talk to jeff evan about my setup with a t3/t04e 57trim .63a/r
he said it would take 15-18psi to reach 400hp on pump gas. just a clue on how 16psi willget you but the setup probably completely diff from y ours

Benson Sleeve B18b
83mm bore
9:1 CP Pistons
Eagle Rods
ACL bearling
balance and polished crankshaft
B16a 2nd gen Head
Gsr Cams
ajustable cam gears
AEBS or Blox intake manifold
mini equal length
3inch dp reducer to 2.5 for my exhaust (will upgrade to 3 later)
Garret T3/T04E 57trim .63a/r
2.5" cold side , 2" hot side charge pipes
maxrev intercooler
1000cc injectors
GM 3Bar map sensor

D@nnY

A good turbo for you would be a sc34 or sc61
I would go with a sc6152e (the smaller of the 3 exhasut wheels) .63 ar....capable of high 500s all day

if you want a quick spooling turbo that will do 450-500 at the wheels aroung 22 psi with race gas Id go with a sc34 .48 Ar