Twins or single?? LY6 600hp goal
The twins had instant spool, but fell off fast. I believe the exhaust housing were too small .58's. There's another member on here with the same turbos I had (turbonetics 61-65's) on a 370 w/ 317's and a 6-speed that made over 900 whp with them. I'm not too sure why they made good power on his combo and not on mine.
The big single pulls hard once it gets going, but because of my converter (PTC) it's hard to get it going. From what I've read the converter is hard to get right with the 4L80's and retain the lock up feature. I also swapped out the cam (which I think helped a lot too).
If I were to go back with twins, they would be larger (at least on the exhaust side).
I like your sig about PTC, so true.
The big single pulls hard once it gets going, but because of my converter (PTC) it's hard to get it going. From what I've read the converter is hard to get right with the 4L80's and retain the lock up feature. I also swapped out the cam (which I think helped a lot too).
If I were to go back with twins, they would be larger (at least on the exhaust side).
I like your sig about PTC, so true.
Teching In
Joined: Jan 2016
Posts: 15
Likes: 0
Don't make the mistake of thinking smaller is better in this regard.
It is entirely dependent on how much flow you can have at what pressure ratio at what RPM.
Here's the thing, on a stock 6.0, yeah a set of twin 57/58mm comps would do fine if say limited to 5,500RPM. But throw in a bigger cam & rev to 6500 & those turbos could start blowing hot air at 80lb/min. That doesn't leave a lot of headroom for growth later, but it's up to the end user.
It is entirely dependent on how much flow you can have at what pressure ratio at what RPM.
Here's the thing, on a stock 6.0, yeah a set of twin 57/58mm comps would do fine if say limited to 5,500RPM. But throw in a bigger cam & rev to 6500 & those turbos could start blowing hot air at 80lb/min. That doesn't leave a lot of headroom for growth later, but it's up to the end user.
The twins had instant spool, but fell off fast. I believe the exhaust housing were too small .58's. There's another member on here with the same turbos I had (turbonetics 61-65's) on a 370 w/ 317's and a 6-speed that made over 900 whp with them. I'm not too sure why they made good power on his combo and not on mine.
The big single pulls hard once it gets going, but because of my converter (PTC) it's hard to get it going. From what I've read the converter is hard to get right with the 4L80's and retain the lock up feature. I also swapped out the cam (which I think helped a lot too).
If I were to go back with twins, they would be larger (at least on the exhaust side).
I like your sig about PTC, so true.
The big single pulls hard once it gets going, but because of my converter (PTC) it's hard to get it going. From what I've read the converter is hard to get right with the 4L80's and retain the lock up feature. I also swapped out the cam (which I think helped a lot too).
If I were to go back with twins, they would be larger (at least on the exhaust side).
I like your sig about PTC, so true.
Thanks 408!
Thread Starter
Staging Lane
Joined: Dec 2015
Posts: 74
Likes: 0
From: Macon, GA
408GT Im on the northwest side near zebulon/bass.. From what I've seen on ebay I might as well throw on a pair of on3 76mm and just have a boost controller and modify then engine along and along for more boost.. A lot of guys seem to be using the on3 turbos and for 320 bucks instead of a china turbo for 200-250 I think it'd be worth it. I want the car to pull through 6500 rpms without maxing out the turbos or blowing hot.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Oh ok. I'm not too far from you then.
I was told to turn mine hard from the previous cam grinder I had, but on SBE stuff I think it's best to keep the rpm low. I would talk to JFR (Stock48) about a cam, and maybe call Viren at VS racing to ask him about turbo selections.
I would go with Circle D or Yank if it's a 4L80e. Might want to get the triple disc so you can lock it under boost.
I was told to turn mine hard from the previous cam grinder I had, but on SBE stuff I think it's best to keep the rpm low. I would talk to JFR (Stock48) about a cam, and maybe call Viren at VS racing to ask him about turbo selections.
I would go with Circle D or Yank if it's a 4L80e. Might want to get the triple disc so you can lock it under boost.
Thread Starter
Staging Lane
Joined: Dec 2015
Posts: 74
Likes: 0
From: Macon, GA
Joe Nova what do you mean by tighter? Lower rpm stall? Sorry for all the dumb questions..
408GT Nice! What track do you usually go to? Yeah its a 4l80e.. Ive gone a ton of different directions with this build since I'm learning a ton in the process.. but I'm going back to the ly6/4l80e harness and Im wondering how I'm going to incorporate the TCU into my 95 camaro.. Ive built a standalone DBC harness for it and had the DBC throttle body to convert it but long story short I'm going back to the original harness with DBW..
408GT Nice! What track do you usually go to? Yeah its a 4l80e.. Ive gone a ton of different directions with this build since I'm learning a ton in the process.. but I'm going back to the ly6/4l80e harness and Im wondering how I'm going to incorporate the TCU into my 95 camaro.. Ive built a standalone DBC harness for it and had the DBC throttle body to convert it but long story short I'm going back to the original harness with DBW..
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
Joe Nova what do you mean by tighter? Lower rpm stall? Sorry for all the dumb questions..
408GT Nice! What track do you usually go to? Yeah its a 4l80e.. Ive gone a ton of different directions with this build since I'm learning a ton in the process.. but I'm going back to the ly6/4l80e harness and Im wondering how I'm going to incorporate the TCU into my 95 camaro.. Ive built a standalone DBC harness for it and had the DBC throttle body to convert it but long story short I'm going back to the original harness with DBW..
408GT Nice! What track do you usually go to? Yeah its a 4l80e.. Ive gone a ton of different directions with this build since I'm learning a ton in the process.. but I'm going back to the ly6/4l80e harness and Im wondering how I'm going to incorporate the TCU into my 95 camaro.. Ive built a standalone DBC harness for it and had the DBC throttle body to convert it but long story short I'm going back to the original harness with DBW..
If your turbos spool faster than that, then go for a converter that is better matched to them. For a street car, it's usually best to get the lowest stall that still puts you above the boost threshold RPM. Gives a good balance between manners and performance.
Thread Starter
Staging Lane
Joined: Dec 2015
Posts: 74
Likes: 0
From: Macon, GA
Man thats awesome. What size hot/cold piping are you running? Im thinking cheap ebay twins or a single on3 t76.. If I can come up with the money ill do two on3s Ill just have to see.
Tony Reiners used two of these on a 351-W and went low 9's: http://www.speedyracer.com/GT45-HUGE...5-V-Band-1-05-
Thread Starter
Staging Lane
Joined: Dec 2015
Posts: 74
Likes: 0
From: Macon, GA
Joe Nova thanks for the info that makes sense.. So would my best bet be to try to get my motor running with the turbos before I purchase the converter? Or just research some guys with the same setup and see about where their turbos start to produce boost? I know theres more to take into account than just that I know id have to look at other upgrades.. Ill have the ls3 intake and ls9 cam and thats it for now so Ill try to figure out when twin t76s with close to that setup start to produce boost?
j
Just went PT88 dual pumps and 1000cc injectors and bigger cam, waiting to finish it up
Joe Nova thanks for the info that makes sense.. So would my best bet be to try to get my motor running with the turbos before I purchase the converter? Or just research some guys with the same setup and see about where their turbos start to produce boost? I know theres more to take into account than just that I know id have to look at other upgrades.. Ill have the ls3 intake and ls9 cam and thats it for now so Ill try to figure out when twin t76s with close to that setup start to produce boost?
80#'s would be fine on the injectors.