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450-550RWHP seems like a pretty big range. I would be willing to bet that the bored engine twin turbo's will make similiar power as my all stroker engine twin turbo. A normal compression 378-388 CID bored LS1 should make about 450RWHP. With low compression 9.0:1 pistons you will be about 395-405RWHP naturally aspirated. With a decent turbo cam (231/232,114,560/560), LS6 intake, and good heads you should pick up 35-40RWHP per psi of boost. Starting off with say 5 psi of boost (5 psi x 35 HP) you should be able to make 575-600RWHP without too much work. As always the key will be in tuning and the cam selection. My cam responded very well at low boost levels, where as some of the newer cams don't start really picking up alot of power until 7-10 psi. My personal belief is to optimize the engine to make as much power as possible on as little boost. Because you can always put in race gas and run a little more boost for the Supra races. :)
Don't let Feldman's BPU talk underestimate his car. I saw what should have been a low 11/high 10 second bike barely pull away from his "BPU" Supra.
Congrats, Godspeed. I'm curious as to what your previous oil pressure readings were that prompted your change? Thanks.
On cold start up I would have a "Low Oil Pressure" message on the DIC and oil pressure would read 0 for about 5-10 seconds. At idle I was only seeing 15-20psi and at WOT I was seeing about 45-50. Sustained WOT (for 4 gears) or what seemed to be hard cornering would also give me another "Low Oil Pressure" message on the DIC and the guage would read 0 psi until I backed off.
I think the problem with mine was a sticking OPRV (Oil Pressure Relief Valve.) The ARE LS6 pump is modded - I believe the pickup valve is ported and it includes a thicker shim for the spring. Bottom line is plenty of oil pressure now and idle and WOT. :)
thanks for the compliment jermey.. but the car really isnt that fast:)
heh... i did almost spill my pepsi when i saw godspeed his DIC had low presure:)
BAHAHA! His DIC has low pressure...*spills Pepsi also*
Chris - a cam is going in soon, then a wet kit I think...I'd like to see 410rw NA before thinking about the bottle though...that's a ways off, I get to go do things like take care of outstanding warrants and such first.. :boxing
thanks for the compliment jermey.. but the car really isnt that fast
heh... i did almost spill my pepsi when i saw godspeed his DIC had low presure
jermey = Jeremy :cry
For those that can't undestand the above statements, I have translated:
Thanks for the compliment Jeremy, but my car (like all Supras) really isn't that fast. I almost spilled my Pepsi when I read how your DIC had a Low Oil Pressure warning.
For the ignorant/Supra owners reading this DIC = Driver Information Center.
i know what DIC is:) but it was funny anyway:)
3 way race between chris,jim and jeremy sounds good though..just need to find a car fast enough to keep up:)
Is it alright if a 99 Hardtop plays, my car is slow , but what the hell I wanna play. Jim what you got up your sleeve for the Z06. Fledman congrats on the supra, I like to see it in person.
Ahh yes, another one of those slow 10 second cars. :rolleyes:
Come on Jeremy, its alright, but wishes it was faster. Jeremy make sure you call me when you pick it up I wanna check out the cage and the mini-tub, you have my number just give me a call. Jim good luck up on your new set-up, what cam are you going to go with?
Chris as always be careful with those nitrous shots. The stock in-tank fuel pump is only good to 525RWHP. Before spraying a second stage I would add at the minimum an in-line pump. Preferably you should look at either the ARE dual in-tank setup or a seperate fuel pump/fuel system just for the nitrous.
I have never sprayed the 2nd shot and I am not until I put my secondary fuel setup on the car. Santa brought me the stuff for the second stage fuel setup, so its just a matter of hooking it up. The numbers in the sig are on a 150 rich shot, and after we plumb the fuel setup I will run 150 stage 1 and 100 stage 2. Also I did find out for sure the vets have 2 fuel pumps with 2 seperate gas tanks, that may be why the car runs way rich, but I am not going to chance. Hopefully next week we are going to use ARP head studs and I got good headgaskets. Then its on to the fuel setup.
I have never sprayed the 2nd shot and I am not until I put my secondary fuel setup on the car. Santa brought me the stuff for the second stage fuel setup, so its just a matter of hooking it up. The numbers in the sig are on a 150 rich shot, and after we plumb the fuel setup I will run 150 stage 1 and 100 stage 2. Also I did find out for sure the vets have 2 fuel pumps with 2 seperate gas tanks, that may be why the car runs way rich, but I am not going to chance. Hopefully next week we are going to use ARP head studs and I got good headgaskets. Then its on to the fuel setup.
Good luck Chris, keep the A/F's rich and let us know how it turns out. Also if you plan to run that much power for any length of time start planning on building a forged bottom end (at least pistons and rods) at some point. I'm sure with the second stage you will be dipping very low into the 10's. :cheers:
Yeah if it can stay together until, march, then I will pull the motor and build a bottom end, pistons and rods and good bearings. Thanks and call me later this week so I can check out your ride.