Billet 7875 Results thread
my buddy had the cast on his heads/ boost cam 5.7l ls1 . He made 570 on 12# . In my opinion . The billet is was more efficient
maybe. But here’s what I figured up. Without knowing either motors hp before the turbo, I estimated the hp gain at 30hp per psi. His motor would have made about 240hp more on 19lbs (remember, estimate because we all know that too many variables and his turbo may have not supported that much hp). So that would have put him in the 800hp range. The billet is supposed to be more efficient and spool faster and be capable of more hp, but I wish someone had the cast, ran their car, put a billet on with no other changes and ran or dynonit again. That would be a true testament.
Joined: Aug 2007
Posts: 24,241
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From: Turnin' Wrenches Infractions: 005
No dyno numbers, but i finally got this one running and tuned. With the Huron speed kit, and a 7lb spring it makes 11.5ish psi. It goes into positive boost at 2500rpms (which i thought was good) Pulls real nice as is, timing is between 17-19 on pump e70, afr is 11.2.
No dyno numbers, but i finally got this one running and tuned. With the Huron speed kit, and a 7lb spring it makes 11.5ish psi. It goes into positive boost at 2500rpms (which i thought was good) Pulls real nice as is, timing is between 17-19 on pump e70, afr is 11.2.
https://www.youtube.com/watch?v=EmnO8pPmXow
https://www.youtube.com/watch?v=EmnO8pPmXow
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
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Verdad Gallardo Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
do what? you lost me
Let me clarify, the 80e tuning isn't/wasn't done there. I didn't tune the manual tables, I had it in 2nd coming over the hill, because i wasn't 100% throttle the ****** shifted to third before i moved the shifter. It's in a table in the tune I just haven't corrected it yet, if that's what you're referring to.
Let me clarify, the 80e tuning isn't/wasn't done there. I didn't tune the manual tables, I had it in 2nd coming over the hill, because i wasn't 100% throttle the ****** shifted to third before i moved the shifter. It's in a table in the tune I just haven't corrected it yet, if that's what you're referring to.
TECH Junkie
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8 Second Club
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4.8, BTR Stage 2, BTR springs, 7875 VS Billet, 4l80e w/HD kit, Circle D single unlocked, 8.8 w/3:73 gears, A2A, E85. 93 Mustang, 3400lbs with driver. Best run to date 10.30 @ 135 with a 1.6 60', 15psi 1rst and 2nd, 10psi 3rd to keep my speed at 135 or less (6pt no cage). Dyno soon to tune to 20psi.
https://youtu.be/q7QwN61oFPE
https://youtu.be/q7QwN61oFPE
Last edited by fegoins; May 5, 2019 at 11:03 PM.
6.0 LQ4 7875, tick stg1 turbo cam, 317s, 3” down pipe with 3” cutout, t-56 car made 711/779 on 17 psi. 530/570 on 10 psi. It makes peak boost around 5,300 rpm and drops off after that.
6.0 LQ4 7875, tick stg1 turbo cam, 317s, 3” down pipe with 3” cutout, t-56 car made 711/779 on 17 psi. 530/570 on 10 psi. It makes peak boost around 5,300 rpm and drops off after that. https://youtu.be/QN8B6BRMJ4U
Nice numbers, I’m curious if you have it in 4th gear and nail the gas at what rpm does it start making boost? Is that the cast or Billet 7875?
if I do that in any gear, boost take a split second to hit. If you want I can take a video of it. Just tell me what gear and rpm you want me at. Mines an auto tho.
Last edited by Kfxguy; Dec 8, 2018 at 09:21 AM.
