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Another 78/75 goes 9s

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Old Jul 10, 2022 | 05:08 PM
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Default Another 78/75 goes 9s

Basic rundown on the combo
00 Firebird Formula
Stock bottom end LS1
Patriot Stage 2 ls6 heads
Summit stage 2 turbo cam
Ls1 intake
80lb injectors - (2) walbro 450s intank
OG VS racing cast 78/75 - 3" bumper exit exhaust
Th400/brake
PTC 9.5 15-0 sprag less
MWC 9", 3.50 gears
5 year old MT 28x10.5 stiff wall slicks
Terminator X

The car is running on e85, 14psi and I just double-checked the logs 12.5* of timing.
1st pass was 3000rpm 2-step 0psi launch off the brake
2nd pass was 3000rpm 2-step 1psi launch off the brake
3rd pass was 4000rpm 2-step 10psi launch off the brake
4th pass was the same as the 3rd just backing it up

1st pass

2nd pass

3rd pass

4th pass
Old Jul 10, 2022 | 05:11 PM
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1st pass -
2nd pass -
3rd pass -
4th pass -
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Old Jul 10, 2022 | 06:33 PM
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Nice work!
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Old Jul 10, 2022 | 10:06 PM
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Congrats!
What is your RPM through the traps with the 3.50 gears?
Assuming the fueling is good, it sounds like you can crank some more timing in it to run even quicker
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Old Jul 11, 2022 | 06:06 AM
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Curious what the duty cycle was on the 80's, congrats on the passes.
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Old Jul 11, 2022 | 07:57 AM
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Wow. Nice. definitely respectable runs for a SBE. May be on borrowed time though. I suggest setting up a boost controller to limit boost off the line to help eliminate that hard launch. Smooth that out and it will help 60' and the overall run. Yes it's cool to pull the wheels for show, but doesn't help the go when it's bouncing. I see a 9.5ish in the future though.

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Old Jul 11, 2022 | 08:02 AM
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RPM is right around 6000 - 3.70s would have been better but without overdrive cruising would have sucked.
Duty cycle is 80% - I think I'm close to tapping them out. I could play with the alcohol content and push them a little further- fuel is reading 74%, so 60-65% would give me a little more to work with.

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Old Jul 11, 2022 | 08:15 AM
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Couple more clicks in the shocks will calm the wheelie even more. I went 3 clicks tighter on the fronts between passes 3 and 4, and it made a huge difference. I've got the Holley boost control wired/plumbed and have played with it a little, but in the end, I said screw it and stuck another spring in the gate to get to 14psi. One less thing to deal with on the first time out.
I love how no one has any love for the sbe ls1. Let's say this one owes me nothing and I have an L33 ready to go. I'm not saying it'll live forever but it's definitely not on borrowed time.
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Old Jul 11, 2022 | 08:48 AM
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12.5 degrees at 14 lbs. definitely has room to go w/ E85, I'm running 12.5 degrees at 10 lbs. on pump swill right now lol.
Just a precursor to more boost....
Congrats on the 9 second pass!
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Old Jul 11, 2022 | 09:33 AM
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nice passes. my 80's were near their limits on E @ 14psi boost, 60psi base fuel pressure as well.
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Old Jul 11, 2022 | 07:13 PM
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Nice combo!!
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Old Jul 11, 2022 | 11:20 PM
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excellent work man.

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Old Jul 12, 2022 | 01:20 PM
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What does it weigh?
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Old Jul 12, 2022 | 04:26 PM
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Originally Posted by Forcefed86
What does it weigh?
I don’t have an actual weight I’d guess 3500-3600 race weight
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Old Jul 12, 2022 | 06:54 PM
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What ar on the turbo
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Old Jul 12, 2022 | 07:30 PM
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.96 turbine housing
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Old Jul 13, 2022 | 11:56 AM
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Nice passes!
Any details on the yellow 5th gen? Seems to be rolling for a NA deal.
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Old Jul 13, 2022 | 01:40 PM
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Sorry I don’t have any info on that Camaro. It was pretty nasty, and I don’t think he even made a full pass
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Old Jul 13, 2022 | 03:09 PM
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I wouldn't say no one has love for a sbe LS1, they just have a pretty solid track record of checking out around 650 wheel.
Congrats on the pass, now stuff the L33 in it, and sell that LS1.
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Old Jul 14, 2022 | 06:15 AM
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wish i could get a 1.3 60ft!! holy cow!
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