ls question

NesbittRacing1 · 06-01-2012, 06:14 PM

so all this talk lately about ls motors has got me wondering, what would it take to get a ls motor in a fox in the 5teen 5.20 range

CHEVYMAN434 · 06-01-2012, 06:18 PM

I would think around 1100-1200 rwhp....

spdracr0 · 06-01-2012, 06:19 PM

depends on the LS motor..

spdracr0 · 06-01-2012, 06:24 PM

A well built 550hp ls plus 300-400 hp nitrous should do it in a typical race fox body @ approx 2700lbs I think. I have been 5.50s with a raggedy windsor and a plate that would just barely make 700 on Tutens dyno

ShawnBoyMoody · 06-01-2012, 06:25 PM

Ask Bad Bob!

LXtasy · 06-01-2012, 07:07 PM

I assume this is for ultimate street. 6.0 h/c/i 300 shot nitrous, Nitrous converter and your 275/60/15. You might need cubic inches, but not much.

1998ta__1991rs · 06-01-2012, 07:08 PM

Quote:

Originally Posted by LXtasy

I assume this is for ultimate street. 6.0 h/c/i 300 shot nitrous, Nitrous converter and your 275/60/15. You might need cubic inches, but not much.

a head cam intake 6.0 with a 300 isnt going to run 5.teens in ultimate street trim, maybe at 2000lbs

ShawnBoyMoody · 06-01-2012, 07:16 PM

Quote:

Originally Posted by 1998ta__1991rs

a head cam intake 6.0 with a 300 isnt going to run 5.teens in ultimate street trim, maybe at 2000lbs

Back halfed miata?

cmd · 06-01-2012, 07:54 PM

Quote:

Originally Posted by ShawnBoyMoody

Back halfed miata?

HYHD!!!!

LXtasy · 06-01-2012, 07:39 PM

Quote:

Originally Posted by 1998ta__1991rs

a head cam intake 6.0 with a 300 isnt going to run 5.teens in ultimate street trim, maybe at 2000lbs

There is other variables as well for that class. I know what i plan on running in that class but wont be teens. I know roughly hp. I bet you can go 5.teens to 5.2x with 402 ci

1998ta__1991rs · 06-01-2012, 07:07 PM

turbo or nitrous?? what's the weight? It would be easier with a turbo. a higher compression 370-408 would do it on a 88mm or so turbo with a 245cc or larger head, thats considering the block has larger diameter head studs, etc..., the stock 4 head bolt blocks can handle 1200 or so rwhp with a spot on tune

a nitrous motor would need to be larger, more in the 420-460" range, on a 6 head bolt block (LSX block, ERL Superdeck, or a RHS Block), and a good bit of compression, with not too much gas on top should get you there.

most of the nitrous guys in the 4's are running canted valve mozez headed 6 bolt blocks with a good bit of spray or a 88-9x turbo.

Matts94Z28 · 06-01-2012, 07:58 PM

Get an lt1...

BAD BOB · 06-01-2012, 08:05 PM

i would personally say i dont think its worth all the work to switch. sbf has proved to work pretty well with the right stuff like any combo. you could have to switch bell housings if you have a glide, new motor plate and stuff. thats just what i think. oh and ls stuff isnt the cheapest stuff when you get away from stock stuff!

bwelch · 06-01-2012, 08:39 PM

408 ported l92 with 400-500hp worth of nitrous.

BigdaddyDupree · 06-01-2012, 11:13 PM

Quote:

Originally Posted by bwelch

408 ported l92 with 400-500hp worth of nitrous.

Sounds familiar. I'd like to go 5.90s one day.

TurboWS6 · 06-03-2012, 04:25 PM

Quote:

Originally Posted by bwelch

408 ported l92 with 400-500hp worth of nitrous.

I don't think L92 heads will take that much of a hit. Deck is too thin, great N/A head though.

bwelch · 06-03-2012, 08:39 PM

Quote:

Originally Posted by TurboWS6

I don't think L92 heads will take that much of a hit. Deck is too thin, great N/A head though.

find somebody who has actually had a problem with them then I will believe that rumor...I know I cant.

TurboWS6 · 06-03-2012, 10:04 PM

Quote:

Originally Posted by bwelch

find somebody who has actually had a problem with them then I will believe that rumor...I know I cant.

Ive seen it first hand out of Steen Racing on two separate occasions when I worked with them.

I will play. Below are a couple pics of a L92 head that was under a S480 turbo @ 12 psi, car was making 650ish belonged to a buddy of mine in Va. This is the direct result of pushing L92's to far with a power adder. When you push these heads past the 600 RWHP range they don't handle it well or for long there are always exceptions to the rule but not many, This motor also had 1/2" studs and LS9 head gaskets. FYI.

Doesn't matter if you go turbo or nitrous the end result is more cylinder pressure and this will eventually be the result.

[IMG]

[/IMG]

schardbody · 06-01-2012, 10:32 PM

ton o spray

ShawnBoyMoody · 06-01-2012, 10:44 PM

Im with Robert on this, Josh your shit is riding out I'd stay Ford!

06-01-2012, 06:14 PM	#1
NesbittRacing1 Senior Member Join Date: Dec 2011 Location: georgetown, sc Posts: 456	ls question so all this talk lately about ls motors has got me wondering, what would it take to get a ls motor in a fox in the 5teen 5.20 range

06-01-2012, 06:18 PM	#2
CHEVYMAN434 Senior Member Join Date: Nov 2009 Location: pineville sc Posts: 671	............ I would think around 1100-1200 rwhp....

06-01-2012, 06:25 PM	#5
ShawnBoyMoody Senior Member Join Date: Aug 2009 Location: In the lab.... Posts: 8,159	Ask Bad Bob! __________________ The Krusty Koupe "Luck favors the oblivious, and boy am I lucky!"

06-01-2012, 07:07 PM	#6
LXtasy Senior Member Join Date: Dec 2006 Location: Summerville, SC Posts: 9,564	I assume this is for ultimate street. 6.0 h/c/i 300 shot nitrous, Nitrous converter and your 275/60/15. You might need cubic inches, but not much. __________________

06-01-2012, 07:07 PM	#11
1998ta__1991rs Senior Member Join Date: Jun 2008 Location: West Ash Posts: 4,283	turbo or nitrous?? what's the weight? It would be easier with a turbo. a higher compression 370-408 would do it on a 88mm or so turbo with a 245cc or larger head, thats considering the block has larger diameter head studs, etc..., the stock 4 head bolt blocks can handle 1200 or so rwhp with a spot on tune a nitrous motor would need to be larger, more in the 420-460" range, on a 6 head bolt block (LSX block, ERL Superdeck, or a RHS Block), and a good bit of compression, with not too much gas on top should get you there. most of the nitrous guys in the 4's are running canted valve mozez headed 6 bolt blocks with a good bit of spray or a 88-9x turbo. __________________ Funny

06-01-2012, 06:19 PM	#3
spdracr0 Senior Member Join Date: Apr 2011 Posts: 568	depends on the LS motor..

06-01-2012, 06:24 PM	#4
spdracr0 Senior Member Join Date: Apr 2011 Posts: 568	A well built 550hp ls plus 300-400 hp nitrous should do it in a typical race fox body @ approx 2700lbs I think. I have been 5.50s with a raggedy windsor and a plate that would just barely make 700 on Tutens dyno

06-01-2012, 07:58 PM	#12
Matts94Z28 Senior Member Join Date: Apr 2008 Location: Summerville Posts: 12,039	Get an lt1... __________________ Charleston Performance Solutions 4560 Rivers Ave. N. Charleston SC 29405 843-225-1142 https://www.facebook.com/CharlestonPerformanceSolutions www.facebook.com/Selepack

06-01-2012, 08:05 PM	#13
BAD BOB Senior Member Join Date: Mar 2008 Location: SUMMERVILLE Posts: 3,681	i would personally say i dont think its worth all the work to switch. sbf has proved to work pretty well with the right stuff like any combo. you could have to switch bell housings if you have a glide, new motor plate and stuff. thats just what i think. oh and ls stuff isnt the cheapest stuff when you get away from stock stuff! __________________ IM BAD BOB

06-01-2012, 08:39 PM	#14
bwelch Senior Member Join Date: Aug 2009 Posts: 3,774	408 ported l92 with 400-500hp worth of nitrous. __________________

06-01-2012, 10:32 PM	#19
schardbody Senior Member Join Date: Sep 2008 Posts: 1,158	ton o spray

06-01-2012, 10:44 PM	#20
ShawnBoyMoody Senior Member Join Date: Aug 2009 Location: In the lab.... Posts: 8,159	Im with Robert on this, Josh your shit is riding out I'd stay Ford! __________________ The Krusty Koupe "Luck favors the oblivious, and boy am I lucky!"

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