Customized STS Twins
8 second mod
iTrader: (37)
Joined: Nov 2002
Posts: 17,879
Likes: 1
From: East Side Performance! mASShole
just build it to spin to 12k rpm, and throw som 5:00 gears out back. hehe
i think if its set up right, it will work out good. maybe not the best 1/4 mile car, but street wise, i think you'll be good. this isnt going on a stock motor either
i think if its set up right, it will work out good. maybe not the best 1/4 mile car, but street wise, i think you'll be good. this isnt going on a stock motor either
Originally Posted by JZ 97 SS 1500
Hmm I have a customer running a single PTE76 GTS with a STS setup. Car doesn't spool till ~5600-5800rpms...hehe. I hope you have alot of paitence.
Jose
Jose
Thats with a 6spd car and the motor is no where near stock (bigger cubes 6.0 block, LS6 heads,fast intake..etc). Car made 727rwhp, which is a nice peak #, but the curve looks like crap. The car will more then likely run well short of what a conventional 700rwhp front turbo setup runs.
Originally Posted by JZ 97 SS 1500
Hmm I have a customer running a single PTE76 GTS with a STS setup. Car doesn't spool till ~5600-5800rpms...hehe. I hope you have alot of paitence.
Jose
Jose
In 4th gear he makes full boost of 10 psi by 2500 rpms with a redline of 6700. I also personally have a 76R on my 3.0 liter 7mgte mkiii supra, in 4th gear I make full boost of 18 psi by 4700. A 76 is not that large of a turbo, especially for a 6.0 liter motor. The 76 I have will spool as fast as a 67.
I also tuned another STS car with a 67 on it and he hit full boost before 3k in 4th. The car you're referring to must have some serious issues to spool after 5k. My guess would be an exhaust leak before the turbo. On a proper STS setup and tune the 76 should spool no later than 3500 on that motor.
If it were me i'd put a GT80R on a STS setup, but i have a sickness. People who complain about lag are pussies. I see you drive supras, 74's 76's are common on those cars and they drive pretty nice.
Last edited by Zombie; Dec 15, 2004 at 10:50 AM.
He spins the motor to 6900rpms.
Zombie, peak torque is where peak boost is at. You will see positive manifold pressure earlier of course, but that is not where you do the comparison. Also a 76GTS with a .96A/R is a far cry from a 67 p-trim.
Jose
Zombie, peak torque is where peak boost is at. You will see positive manifold pressure earlier of course, but that is not where you do the comparison. Also a 76GTS with a .96A/R is a far cry from a 67 p-trim.
Jose
Originally Posted by JZ 97 SS 1500
He spins the motor to 6900rpms.
Zombie, peak torque is where peak boost is at. You will see positive manifold pressure earlier of course, but that is not where you do the comparison. Also a 76GTS with a .96A/R is a far cry from a 67 p-trim.
Jose
Zombie, peak torque is where peak boost is at. You will see positive manifold pressure earlier of course, but that is not where you do the comparison. Also a 76GTS with a .96A/R is a far cry from a 67 p-trim.
Jose
You come from the world of the supra, doesn't that seem odd to you that it's so laggy? I'd be willing to put money that if we put a 76 on my friend kane's setup that he would make 7 psi by 3300 rpms in 4th. Hell, my 3.0 liter makes 1 psi at 2200 rpms, 10 psi by 4000, after 4500 it just takes off.
I would use a .81 vs a .96 housing though. The .81 will flow enough for 800+ rwhp.
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Verdad Gallardo Well first the 76GTS is peaking boost at around 5000-5500 on the 2JZ's depending on cams, head and exhaust differences. Also we have already seen that the STS cars with the rear mount setup dyno very similar to the 2JZ with convential turbo setups. So with that being said the #'s for the LS1 are quite fine. Also check most of the LS1 STS setups out there and take a look at the dyno sheets. Where you see peak torque, that is where they are hitting full boost at.
As for the .81A/R making 800rwhp, that will depend on the size of the motor. With a smaller PR the lower the efficiency % will drop. Remember that the PR and air consumption are related to each other. Thats what the compressor maps are for. A turbo that makes 900rwhp on a supra won't necessarily make 900rwhp on a big cube motor.
Jose
As for the .81A/R making 800rwhp, that will depend on the size of the motor. With a smaller PR the lower the efficiency % will drop. Remember that the PR and air consumption are related to each other. Thats what the compressor maps are for. A turbo that makes 900rwhp on a supra won't necessarily make 900rwhp on a big cube motor.
Jose
this will be interesting to see how it turns out...so both are going where the muffler goes? are you going to make any kind of shroud or casing for them? I dont know what kind of problems you run into with one in back such as speed bumps and such, but id imagine it will get tight back there with 2 of em...and are they going to merge into one pipe in back then come forward or are you going to run 2 pipes forward and into seperate sides of an intercooler? im curious as to how its beneficial to do this if youre going to just slap it all back into one pipe right away.
Originally Posted by JZ 97 SS 1500
Well first the 76GTS is peaking boost at around 5000-5500 on the 2JZ's depending on cams, head and exhaust differences.
2JZ motors rule! WOOT WOOT!
Originally Posted by JZ 97 SS 1500
Hmm I have a customer running a single PTE76 GTS with a STS setup. Car doesn't spool till ~5600-5800rpms...hehe. I hope you have alot of paitence.
Jose
Jose
how about the vette making 750 hp and 800+ tq by 4500 dont see you in that thread. Last edited by PurEvl; Dec 15, 2004 at 03:24 PM.
Originally Posted by smokinHawk
ya he has the turbo in the back 
Mike, how is it that your cam is smaller, your turbo is smaller and it's in the BACK of the car but both of you peak at the same point expect you make 100+ more hp.
That's weird man. He has a front mount too.
That's weird man. He has a front mount too.
Last edited by Joe "Preachers Sheets" DIESO; Dec 15, 2004 at 03:35 PM.
PurEvl , yeah pretty sad that peak boost/torque wasn't till ~4700 rpms with a 410ci LS1....lol. On top of that I didn't see where the owner mentioned which 76 he is using. Its sad enough if its a 76GTS, but its horrible if its a standard p-trim unit. Nice try though... 
Originally Posted by JZ 97 SS 1500
PurEvl , yeah pretty sad that peak boost/torque wasn't till ~4700 rpms with a 410ci LS1....lol. On top of that I didn't see where the owner mentioned which 76 he is using. Its sad enough if its a 76GTS, but its horrible if its a standard p-trim unit. Nice try though...
you and smokin win the prize
Originally Posted by PurEvl
oh ya got me...not....hows your kit going, got 50 a month out yet like sts, oh hows that lt1 that blew up, keep up the good work buddy
you and smokin win the prize
you and smokin win the prize
Typical STS owner response. When the facts are thrown out....its time to start the child like responses.... nice.
BTW, I think you meant the bone stock LT1....well it doesn't take a rocket scientist to figure it wouldn't last long under those conditions, nor would any other turbo kit. Now you have seen where the 355 LT1 is going 153mph right
, oh and its a daily driver. Jose
JZ, i'm guessing that you are not a STS fan. They do seem to work quite well. I don't understand why so many people still want to play the big endian little endian card on where the turbo is located. It's still gonna make power and a lot of it.
I've tuned many turbo cars and two STS cars. The STS cars ran awesome, I sure didn't notice any difference except all the extra power. I personally am a big supporter of STS. Making power with a turbo setup is really very easy, even if it's not the normal way.
PureEvl, those are great numbers from your setup. I'm hoping to join the STS club in the near future.
I've tuned many turbo cars and two STS cars. The STS cars ran awesome, I sure didn't notice any difference except all the extra power. I personally am a big supporter of STS. Making power with a turbo setup is really very easy, even if it's not the normal way.
PureEvl, those are great numbers from your setup. I'm hoping to join the STS club in the near future.
Launching!
Joined: Jan 2002
Posts: 275
Likes: 0
From: Bardonia, NY
Not to put this thread back on-topic or anything but figured I'd take a quick stab at the following.
Just for reference sake, The winter 2004 Engine Masters magazine has a 482 ci, 2,886 HP twin 91 mm turbo pontiac. Headers have 2" primaries into a 2.5" Collector. As per the article: "Though the collector size sounds a bit small, it was purposely built that way to increase exhaust gas velocity to quicken the response of the turbos and build boost quickly. Rodney says that the flow is not restricted by the smallish collectors; the turbo is the only restriction in the exhaust tract." I don't know at what point I would seriously start thinking about larger than 2.5" crossover pipe (or exhaust between collector and turbo for that matter)... but I think it is probably beyond what we would likely be able to reliably make from an LS1. That being said, you know if you go with small tubing, every douche you meet at a gas station is going to say that you shoulda gone with 3" 
Originally Posted by Jammer
If anyone has any input its not to late..my biggest concerns we whether to run dual 3" and dual 2.5" and weather to have an "h" or "X" and if it makes any difference having either.
Last edited by XJGPN; Dec 15, 2004 at 07:04 PM.