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Single 66mm Turbo too small for LS1?

Old 11-08-2018, 04:40 AM
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Default Single 66mm Turbo too small for LS1?

Hi, I'm pretty new to the LS engines and I'm looking to do a budget turbo build on my LS1 that is in my GQ Patrol 4x4, I'm not really looking for power just want a bit more torque and have that **** factor haha.
I can pickup a BorgWarner 300SX3 for a reasonable price and figured it's a bargain if it's not too small for my LS1, Has anyone got experience with a similar sized turbo? Thanks in advance.

I'm planning on doing this with a stock LS1 and no more than 7psi of boost.
Compressor Wheel: 66 mm inducer / 91.4mm exducer
Turbine Wheel: 80 mm inducer / 73 mm exducer 0.91 A/R
https://www.jegs.com/i/BorgWarner/156/177275/10002/-1

Alternatively if anyone has any sub $1000 turbo recommendations that would also be greatly appreciated.

Last edited by FreakyGQ; 11-08-2018 at 04:46 AM.
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Old 11-08-2018, 11:30 AM
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I ran that turbo on the cam only stock long block 5.3 in my c10 for a long time. It reliably made 545 to the tire in it and spool was very quick. It was a fun truck to drive for sure!
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Old 11-08-2018, 07:45 PM
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That would be perfect for your setup , had a t4 S475 on a 6.0 , it would make about 5 psi starting at 2000rpm . So being similar displacement and smaller turbo it should spool quick .
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Old 11-08-2018, 08:22 PM
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I'm going to run that turbo on my L33. I have it left over from another project so I'll be seeing how it does.
I'm aiming for right around 550whp and it should do that pretty easily.

Guess it just depends on how much power you want to make.
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Old 11-08-2018, 10:43 PM
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Originally Posted by Lsx Rubi View Post
That would be perfect for your setup , had a t4 S475 on a 6.0 , it would make about 5 psi starting at 2000rpm . So being similar displacement and smaller turbo it should spool quick .
​​​​​​
Wouldn't that be too soon for highway cruising?

From my understanding you don't want to be in spooling range while cruising do you?
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Old 11-08-2018, 11:58 PM
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boost threshold.

it's not gonna spool at 2000 rpm cruising. maybe 2000 cruising and you stab WOT it'll spool.
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Old 11-09-2018, 01:19 AM
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Originally Posted by truckdoug View Post
boost threshold.

it's not gonna spool at 2000 rpm cruising. maybe 2000 cruising and you stab WOT it'll spool.
Would it be particularly bad for fuel economy or wouldn't matter much? Does that also mean that cruising at 2500rpm or even 3000rpm it wouldn't be boosting?
Thanks for the help so far fellas you all have been really helpful.
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Old 11-09-2018, 02:16 AM
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Originally Posted by FreakyGQ View Post
Would it be particularly bad for fuel economy or wouldn't matter much? Does that also mean that cruising at 2500rpm or even 3000rpm it wouldn't be boosting?
Thanks for the help so far fellas you all have been really helpful.
I don't know if you have driven a turbo vehicle before , but boost depends on how much you are loading the engine . You can have the engine revving at 5000 rpm and still be pulling a vacuum if there's no or low load . Your right foot controls the boost . As for fuel economy if you are cruising and staying out if it you'll get same , if not better than N/A .
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Old 11-09-2018, 10:16 AM
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Originally Posted by FreakyGQ View Post
Hi, I'm pretty new to the LS engines and I'm looking to do a budget turbo build on my LS1 that is in my GQ Patrol 4x4, I'm not really looking for power just want a bit more torque and have that **** factor haha.
I can pickup a BorgWarner 300SX3 for a reasonable price and figured it's a bargain if it's not too small for my LS1, Has anyone got experience with a similar sized turbo? Thanks in advance.

I'm planning on doing this with a stock LS1 and no more than 7psi of boost.
Compressor Wheel: 66 mm inducer / 91.4mm exducer
Turbine Wheel: 80 mm inducer / 73 mm exducer 0.91 A/R
https://www.jegs.com/i/BorgWarner/156/177275/10002/-1

Alternatively if anyone has any sub $1000 turbo recommendations that would also be greatly appreciated.
If you only scrolled down a bit, you would have found this:

https://ls1tech.com/forums/forced-in...s366-step.html

Andrew
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Old 11-10-2018, 06:07 PM
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Originally Posted by Project GatTagO View Post
If you only scrolled down a bit, you would have found this:

https://ls1tech.com/forums/forced-in...s366-step.html

Andrew
Welp I can't believe I didn't see that, I think for the price point I'll give this turbo a go, Thanks for the help fellas.
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