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5.3 s475 731rwhp 16lbs https://cimg8.ibsrv.net/gimg/ls1tech...e9fd12a31.jpeg Update: Ended up making 780 rwhp before running out of turbo. Really happy with how it turned out It made 780 rwhp on about 19lbs before running out of turbo Truck was tuned a couple of days ago and I wanted to post my results. Mods: Forged 5.3 s475 83 1.10 T6 TFS220 Heads LJMS Stage 2 Cam TBSS Intake E85 and Meth 4l80 Build was completed by Lucas Performance and tuned by Bluecat. Engine was assembled by Croppers Racing Engines. I’m really happy with the results! The truck drives really well with the cam and it’s definitely making good power for only being a 5.3. This dyno run was on only 16lbs and we had to stop here due to running out fuel from the two walbro 255s.https://cimg2.ibsrv.net/gimg/ls1tech...0c18cc3f7.jpeg |
Awesome numbers! |
Those are great numbers. Carries the power very well with the smaller turbine and housing. But spools up nicely (assuming the normal 4500 full spool on the 5.3L and the 130mph=6500RPM or higher). |
I’m really happy with how it turned out. We’re putting a couple bigger fuel pumps in it to see if we can squeeze some more out of the little turbo. |
I know someone with almost the exact same setup. Cam is a little different. He shoves 24#'s in it and it put down 880ish. Same heads, 5.3 same turbo. You have more on tap once the fuel is there. He has 210's on E. |
We actually put it back on the dyno yesterday. We ended up making 780 on 19lbs of boost. We tried to make more but the turbo was just running out of steam and wasn’t wanting to make anymore power. I’m really happy with how it turned out though. |
I would have though that T6 75mm on 5.3 wouldn't be done at 19psi 780rwhp? by out of turbo do you mean adding wastegate DC isn't increasing boost, or increasing the boost isn't adding power? what size is the off side manifold, crossover pipe and manifold diameter? what gate spring? |
It might not have been completely tapped out but it was definitely starting to slow down. We upped the boost quite a bit at the end and it wasn’t making much more power. |
Cast wheel can do probably 900 to the tire on a 5.3 with a 6-speed with the 83 turbine. Through a 4L80 it's eating it up somewhat. Converters on a 4L80 are usually tighter than TH400s/PGs and eat up more power too. I would have thought you'd get into boost a little sooner though. That looks like a 96/1.32 dyno without the extra oomph uptop. |
Originally Posted by JakeFusion
(Post 19942045)
Cast wheel can do probably 900 to the tire on a 5.3 with a 6-speed with the 83 turbine. Through a 4L80 it's eating it up somewhat. Converters on a 4L80 are usually tighter than TH400s/PGs and eat up more power too. I would have thought you'd get into boost a little sooner though. That looks like a 96/1.32 dyno without the extra oomph uptop. |
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