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Discussion Starter #1
What would you consider the limit on power / boost of this?
Stock block poured, 1/2" stud conversion, 3.800 bore, ARP main studs, stock crank, 799 heads just touched to be sure they were straight and slightly softened chambers, Molnar power adders rods, Wisco K474M965 pistons, LS9 gaskets, E85? I understand it's all in the tune but where should I hold up on pushing forward?
 

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With cam and intake to run 8500rpm and IAT < 120F. I'd figure fuel (CC temps higher than M1), thin deck head and MLS HGs (no fire/sealing ring) will probably limit you to 1300whp. Pour on the boost after 6500, don't get greedy with timing and let us know.
 

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Went out yesterday. Went mid 5.40s at 131-132. Ran it up to 32-33 pounds on conservative timing. IAT was in the low 100s. (Measured in the plenum of a carb setup "wet") Coolant pressure and pan vac seamed steady so I think it was happy. I'll probably not go up on boost and creep up on the timing.
I'm 3330 pounds. Per the Wallace calculator, that falls close to the same power as [B]gbeauregard[/B].
 

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Discussion Starter #6
I have a hard time reading fuel on this combo. But yes I'll keep and eye on them while creeping up on it.
 

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Well done. 1075ish whp. Drop back rpm on shift? What rpm and timing with peak boost? What plug and what do they show? BTW - what turbo(s)? Thanks for sharing.
 

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similar setup .... but stock size studs, TFS heads and not filled L33 block. 30 psi from s485 turbo. 8000 rpm all year ran [email protected] 3000lbs . tore it down this winter and every thing looked new.
How long has this combo been together? I'm also running an unfilled L33 block, and over the xmas holidays switched from a solid motor mount to a motor/mid plate to get the stress off the sides of the block. 23.5# on C16, shifting at 7000. I broke the block after a driveshaft failure, and after 3 years of street driving and 90 passes, the bearings looked like it just went together. Block limitations is what I'm trying to gather data on.
 

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This engine has been in the car for 31 passes. The first 15 with a converter that was tight. Shifting at 7700 it dropped to 6100 at 30 psi. (1.80 powerglide). This converter shift at 7700 it drops to high 7000s. It's been pretty hard to nail this down because all of my testing has been toward noprep setup, so it's been on crap track with varying amounts of wheel speed/spin. I'm running motor and midplate. Turbo is a S485. CSU blow through on E85 with Holley Dominator ECU.
 

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How long has this combo been together? I'm also running an unfilled L33 block, and over the xmas holidays switched from a solid motor mount to a motor/mid plate to get the stress off the sides of the block. 23.5# on C16, shifting at 7000. I broke the block after a driveshaft failure, and after 3 years of street driving and 90 passes, the bearings looked like it just went together. Block limitations is what I'm trying to gather data on.
one season , about 50 passes.plus some dyno time. no motor plate , switched from s485/96 to s491/102, gonna push it a little harder. going to cecil on the 21st if it doesnt rain
 

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one season , about 50 passes.plus some dyno time. no motor plate , switched from s485/96 to s491/102, gonna push it a little harder. going to cecil on the 21st if it doesnt rain
Im going to the same turbo , from basically the same turbo ....lol

My S484 is maxed also . I just hope my short times dont suffer with the 91 . Or the street driving .

I just got in the 1.24 sixties the other night and its going 5.60 to the eighth . I dont want to lose that and just gain on the big end .

But its a bolt on switch , so I can always just pull it back off and keep on keeping on . :)
 

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This engine has been in the car for 31 passes. The first 15 with a converter that was tight. Shifting at 7700 it dropped to 6100 at 30 psi. (1.80 powerglide). This converter shift at 7700 it drops to high 7000s. It's been pretty hard to nail this down because all of my testing has been toward noprep setup, so it's been on crap track with varying amounts of wheel speed/spin. I'm running motor and midplate. Turbo is a S485. CSU blow through on E85 with Holley Dominator ECU.
Why a holly dominator with a blow thru carb?
 

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Im going to the same turbo , from basically the same turbo ....lol

My S484 is maxed also . I just hope my short times dont suffer with the 91 . Or the street driving .

I just got in the 1.24 sixties the other night and its going 5.60 to the eighth . I dont want to lose that and just gain on the big end .

But its a bolt on switch , so I can always just pull it back off and keep on keeping on . :)
I made the switch from a 80/96 to a 91/102 last season and it’s a monster lol it was a little slow on the spool up but a little work in the tune and boost controller and it makes 24lbs in .48 seconds from t brake release.
 

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I made the switch from a 80/96 to a 91/102 last season and it’s a monster lol it was a little slow on the spool up but a little work in the tune and boost controller and it makes 24lbs in .48 seconds from t brake release.
Nice .

Im hoping for 150 to 200 more HP .

Right now calculators says it takes 1325 hp to go 8.76 @ 155 . 4600lbs

1475 = 8.50 @ 160 < what Im shooting for
1525 = 8.35 @ 162 < probably not gonna happen
 

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Nice .

Im hoping for 150 to 200 more HP .

Right now calculators says it takes 1325 hp to go 8.76 @ 155 . 4600lbs

1475 = 8.50 @ 160 < what Im shooting for
1525 = 8.35 @ 162 < probably not gonna happen
wallace calculator puts me right about the same power as you 1325-1350 on 28lbs of boost at that power level the turbo is still 1.1 with gate pressure and it’s not making any heat so I believe it’s still a long way from running out of steam

op I make 1320-1350hp on a s.b.e. Ls3 so with a built motor I would just keep turning it up
 
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