bluestreak98

iTrader: (21)

I recently bought a 2000 SS roller that has a lot of suspension and drivetrain upgrades and it will be the perfect platform for me to build a turbo car. After doing some research I called Huron Speed and put my deposit on the V2 A/C Kit but I haven't picked a turbo yet.

So, a little bit about my goals for the car. First off, the car will be an auto and I'd like to do a 4L80E swap. The 4L80E will be attached to a '99 5.3L with stock 241 heads, LS9 head gaskets, new LS7 lifters, LS6 intake, aftermarket valve springs, and a cam I haven't decided on yet. As far as fuel system goes, I'm not sure what to do about a fuel system and if E85 is going to be necessary or not. I would like to make in the neighborhood of 650RWHP with the potential to go for more . For now, I'd also like to keep the stock radiator placement.

I have a good friend who has had a lot of good experience with Garrett Turbos and he recommended the GT42R. He is also a dealer and I can get a pretty good price on it.

When I asked Huron Speed for their opinion, they recommended the PTE 7675cea, Turbonetics T7575, or Comp CT43 7679.

But, I wanted to ask my fellow LS1tech members for their opinion because I'm so new to the turbo game! Help me out!

Meth Sled

iTrader: (1)

I'd run a Turbonetics turbo, they've got killer customer service and products! A 75/75 seems a little overkill for your power goals, however, you should be in the peak efficiency area of the compressor, and leaves you a few hundred horse to grow when you're wanting to get greedy

Meth Sled

iTrader: (1)

Beautiful car by the way!

And to touch on the other subjects. 650+ can easily be made on regular pump gas, no need for E85, and I'd suggest a BTR Trunion upgrade while you're in there.. Just one more little thing that can go wrong.

SLOW SEDAN

iTrader: (13)

I'm a fan of the PTE 7675CEA, I made right around 600whp on 10PSI through an auto but that's on a 6.0L so you may need a a few more lbs on a 5.3. I haven't dynoed it at 20PSI but I turn it up from time to time and she runs hard. I don't think you can go wrong with Garrett turbos either, I used them for years and never had an issue. In this case I liked the PTE better for packaging since they are physically smaller.

I'm running the Aeromotive Eliminator pump and it holds everything I've thrown at it.

LT1RAY

iTrader: (21)

I would run a Turbonetics 7875.

bluestreak98

iTrader: (21)

Thanks for your inputs everyone. I'm sure there are more people with the same power goals as me, anyone else?!

RedRocketZ28

iTrader: (19)

I loved my Turbonetics 7875 1.15 ar. Powered my Camaro into the 9's very easily.

bluestreak98

iTrader: (21)

What was your motor setup? My car will also have a 4L80E and a 9".

RedRocketZ28

iTrader: (19)

Stock bottome end 03 LQ4, Speed Inc. TU1 cam, dual springs, LS6 intake. I have a build thread on here as well if you want to take a look.

Here's a video of it at the track.

bluestreak98

iTrader: (21)

I think I'm sold

Your setup is going to be pretty similar to mine. I look forward to reading your build thread!

RedRocketZ28

iTrader: (19)

Good deal! The 7875 on a 5.3 would be much happier. I was on 14-15 lbs. when mine went 9's as well. That was around 650 rwhp.

SLOW SEDAN

iTrader: (13)

Whats the spool like on the 7875? With the 7675 I'm in boost by 2800-3000RPM and at whatever I have the boost controller set to by 3800 RPM whether that be 10lbs or 20lbs. Seems fair amount of guys are making 800-900whp at 18-21lbs, need to get my pig on a dyno.

Does the 7875 have the same room for growth? Guys are making 900+ at 18lbs on the 7675.