My somewhat coherent thread on the topic of street/strip turbo LS combinations.
08-19-2012, 11:30 AM
#21
Well I'm sure you've seen Jason (lt1camaroman) mustang when u guys tuned it with the s480 and Phil's teal mustang with a s480 also and made stupid power. You'll be tuning my s480 here shortly also so you'll be able to report back with your opinion on those units 
08-19-2012, 01:44 PM
#23
You are to be commended for taking this thread on.Great info,and direction for folks that want to turbo but don't know enough to get started on their own.That first street /strip setup you described with gt35's or simular turbos sounds like the ticket for me.
08-19-2012, 05:24 PM
#28
Stroke and rod length has more to do with turbine size than actual cubic inches.
For comparison a 5.3 and a 5.7 should be looked at very similarly in turbine size for each because they both share the same stroke. Similar not identical though, I would say the 75mm turbine is as small as I would go on a 5.3 and a 75-83mm would be as small as I'd go on a 5.7 where as on a 6.0 I'd want no smaller than a 87mm-92mm turbine.
08-19-2012, 08:04 PM
#30
FormerVendor
Thread Starter
08-19-2012, 10:28 PM
#33
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Which turbos would you recommend for a 383 c.i. ls1, twin set up, street/strip, automatic transmission? I know there are other variables involved, just looking for suggestions.
08-19-2012, 10:58 PM
#34
I bought a used TC78 with 1.15 A/R turbine and ballbearing center section to run on an L33 alum 5.3 with ported 5.3 heads, LS6 intake, 225/223 cam, and Chiseled A/W intercooler with a 6speed in a '69 Chevelle. Putting a 9" out back and 3.25 gears.
Hoping for 800rwhp on e85. My buddy made 830rwhp with this exact turbo on a built LS3 with ported heads/LS3 intake and 6spd.
Hoping for 800rwhp on e85. My buddy made 830rwhp with this exact turbo on a built LS3 with ported heads/LS3 intake and 6spd.
08-20-2012, 12:16 AM
#35
I agree with los, it's small even for a street car.
Stroke and rod length has more to do with turbine size than actual cubic inches.
For comparison a 5.3 and a 5.7 should be looked at very similarly in turbine size for each because they both share the same stroke. Similar not identical though, I would say the 75mm turbine is as small as I would go on a 5.3 and a 75-83mm would be as small as I'd go on a 5.7 where as on a 6.0 I'd want no smaller than a 87mm-92mm turbine.
Stroke and rod length has more to do with turbine size than actual cubic inches.
For comparison a 5.3 and a 5.7 should be looked at very similarly in turbine size for each because they both share the same stroke. Similar not identical though, I would say the 75mm turbine is as small as I would go on a 5.3 and a 75-83mm would be as small as I'd go on a 5.7 where as on a 6.0 I'd want no smaller than a 87mm-92mm turbine.
08-20-2012, 11:01 AM
#37
I am so mad you posted this.....NOW I HAVE TO BUILD A TWIN SETUP THIS WINTER!!!! LOL
Great info....I can crunch numbers and try to build a "theoretical turbo setup" but you have the true data and knowledge to know what works and what fails.
Thanks Jim
Great info....I can crunch numbers and try to build a "theoretical turbo setup" but you have the true data and knowledge to know what works and what fails.
Thanks Jim
08-20-2012, 03:50 PM
#40
Great read, this validates a lot of my assumptions. Seems like most turbos are oversized by manufactures also. Garrett states the 3076 is sized for up to 2 litres making twins too small for 390 cubes, but looking at the compressor maps I came to your same conclusion. Being no expert, I was doubtful as this info is hard to come by.