930 rwhp is it possible with this setup?
09-20-2008, 06:06 PM
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930 rwhp is it possible with this setup? My goal is around 930 rwhp and torque to around the same. Will a forged 408 with comp star rods and crank and mahle pistons with 8:5:1 comp. Topped off with 225 afrs and a victor jr intake and an elbow from intake elbows.com. will this get me there if a pair of 67mm turbos are strapped to it. Id like to keep boost around 15 to 18 psi. And it will all be controlled by a BS3, and all run through a fully built t56. It would be nice to be able to run 93 in the car but there is 100 octane at alot of the gas stations around here if that is what it comes too. The car will be mostly a street toy with moderate track use. Cam is still undecided at this point thanks.
09-20-2008, 06:29 PM
#6
nope, you'd only make 929rwhp so sucks for you 
Seriously tho, id say go big single or twin 70's or even twin 76's with the right a/r in the turbine housing and with pump gas, meth, enough boost, and enough supporting mods for that power level, you'd get 900rwhp rather easily.
Seriously tho, id say go big single or twin 70's or even twin 76's with the right a/r in the turbine housing and with pump gas, meth, enough boost, and enough supporting mods for that power level, you'd get 900rwhp rather easily.
09-20-2008, 06:30 PM
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It doesnt need to be that exact number if i was at 914 id be thrilled i just dont want 899 and lose out by one pony. And i do understand Meth injecton works great but what happens if that pump decides to stop working on a day where im at full boost at the track or what not. id hate to burn up an engine just because i wanted to save on fuel.I understand it works great for many on here but id be afraid to trust something like that. For track only cars i can see that being fine bc it only runs for 1/4 at a time but what about a street car when its on all the time. Has anyone ever expirienced this on there street car or are they really that reliable.
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09-20-2008, 06:33 PM
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i was thinking about turbonetics 76s but everyone i see with twin 76 cars have a 427 or bigger, wasn't sure if a 408 would have the flow to spin them without a ton of turbo lag.Some turbo lag is fine for me im not that fussy about it but i just wants sure if they were to big and would be ineficient.
09-20-2008, 06:38 PM
#9
Well you can tune down some on the street also. You are not going to be hooking up much over 600rwhp on the street.Feel free to try though.I also have big goals want to hit 800 rwhp with an auto on a dyno but realistically expect to run around on the street with maybe 500 to 600rwhp tops.
Heck I can't hook my 96z with 325 hp and a 2800 vig and 3.42 gears and nittos on the street. How the heck can you hook up much over 600rwhp.Answer you can't! Track well different animal of course.
I don't see any problems at all hitting 900rwhp or even 1000 with 408 good heads, a reasonable cam and twin 67s or 76s or one big snail.
Guys are also making great power with e85. I wish we get it up here someday. Might be a long weight though. I set my compression ratio up a bit high at 9.5. I plan to run meth and not too worried. For track run at max boost could put in race gas to be safe.For street dialed down to 600rwhp would be able to get that with very safe timing and afr. You can push timing with meth but yeah then can be in trouble if the system fails.
Always some risks with any FI build. You need to have deep pockets although few local guys are running low 11s and will likely be in the 10s with some pretty budget mostly ebay turbo stuff. Impressive. I went mostly with proven stuff. Hope to have some numbers but think it will be next spring. If fall a bit short of my 800rwhp then have a zex kit for a bit extra if its needed to hit my dyno number goal.
Heck I can't hook my 96z with 325 hp and a 2800 vig and 3.42 gears and nittos on the street. How the heck can you hook up much over 600rwhp.Answer you can't! Track well different animal of course.
I don't see any problems at all hitting 900rwhp or even 1000 with 408 good heads, a reasonable cam and twin 67s or 76s or one big snail.
Guys are also making great power with e85. I wish we get it up here someday. Might be a long weight though. I set my compression ratio up a bit high at 9.5. I plan to run meth and not too worried. For track run at max boost could put in race gas to be safe.For street dialed down to 600rwhp would be able to get that with very safe timing and afr. You can push timing with meth but yeah then can be in trouble if the system fails.
Always some risks with any FI build. You need to have deep pockets although few local guys are running low 11s and will likely be in the 10s with some pretty budget mostly ebay turbo stuff. Impressive. I went mostly with proven stuff. Hope to have some numbers but think it will be next spring. If fall a bit short of my 800rwhp then have a zex kit for a bit extra if its needed to hit my dyno number goal.
09-20-2008, 06:52 PM
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Check this out, https://ls1tech.com/forums/forced-induction/973844-ofi-98-t-epp.html
It has more of a peak powerband, but it does make the big hp, just about what you want 930rwhp
lol.
On that particular setup, we used 93oct for 14psi (700rwhp/760rwtq) and 116oct for 21psi (921rwhp/880rwtq).
This car has 275 radials on it and it does not hook on low boost, at all period! lol.
A setup like this is more race oriented due to the fabricated headers and also the large single turbo 91mm.
A aps 427 setup would put you where you need to be, the larger turbos on a low 400in motor would make stupid torque.
It has more of a peak powerband, but it does make the big hp, just about what you want 930rwhp
lol. On that particular setup, we used 93oct for 14psi (700rwhp/760rwtq) and 116oct for 21psi (921rwhp/880rwtq).
This car has 275 radials on it and it does not hook on low boost, at all period! lol.
A setup like this is more race oriented due to the fabricated headers and also the large single turbo 91mm.
A aps 427 setup would put you where you need to be, the larger turbos on a low 400in motor would make stupid torque.
09-20-2008, 08:26 PM
#12
It doesnt need to be that exact number if i was at 914 id be thrilled i just dont want 899 and lose out by one pony. And i do understand Meth injecton works great but what happens if that pump decides to stop working on a day where im at full boost at the track or what not. id hate to burn up an engine just because i wanted to save on fuel.I understand it works great for many on here but id be afraid to trust something like that. For track only cars i can see that being fine bc it only runs for 1/4 at a time but what about a street car when its on all the time. Has anyone ever expirienced this on there street car or are they really that reliable.
09-20-2008, 08:56 PM
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beotch. i'm contemplating going with a black top half chip foose style
paint for next summer...just wanna see how the contrast looks on yours.
thanks
09-20-2008, 09:04 PM
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"And i do understand Meth injecton works great but what happens if that pump decides to stop working on a day where im at full boost at the track or what not. id hate to burn up an engine just because i wanted to save on fuel.I understand it works great for many on here but id be afraid to trust something like that".
any pump can fail, this we know. you allready rely on your fuel pump to not break, that's the number one part in the whole show, so why wouldnt you question that?
bottom line, the pump wont let go, and if it does, it's just shyt luck,... but i would rather that pump let go, than my fuel or oil pumps.
welcome to extreem sportz! now fire your engines.
any pump can fail, this we know. you allready rely on your fuel pump to not break, that's the number one part in the whole show, so why wouldnt you question that?
bottom line, the pump wont let go, and if it does, it's just shyt luck,... but i would rather that pump let go, than my fuel or oil pumps.
welcome to extreem sportz! now fire your engines.
09-21-2008, 01:47 AM
#16
My engine is similar to your, with twin 67's.
1) You need a very very good fuel system
2) You had better have a damn good tuner
3) Don't even think of running 93 and think you will get 900rwhp
4) You'll need at least 114
5) Plan on 20+ boost to get to 900
Best dyno on the SS - 1003.5rwhp on 114. 160lb injectors using a kick *** fuel system
Good Luck
David
1) You need a very very good fuel system
2) You had better have a damn good tuner
3) Don't even think of running 93 and think you will get 900rwhp
4) You'll need at least 114
5) Plan on 20+ boost to get to 900
Best dyno on the SS - 1003.5rwhp on 114. 160lb injectors using a kick *** fuel system
Good Luck
David