single turbo all steel 496 BBC 8.81@157mph

grumpyvette

grumpyvette

Administrator
Staff member
991a26b.jpg

Single big turbo on E85.
He made his runs at 9 PSI, which basically overwhelmed his NA converter.
On the 7200 limiter for the last 300 feet.
Drag radials.

8.81 @ 157
It has AFR 345 heads,496 cubic inch big block chevy, Comp street roller 254/260, 9.5CR, edelbrock intake, CSU blowthru carb. I think it is a 101mm turbo by Precision.
NA it ran 10.40@130.
TH400 9" with 3.25 gears.
For next year it will have a PTC turbo converter and 3.08 gear.

Of course it will be WAY faster than his cage is certified for.

All steel car, still has the back seat. And he drives it.
 
8

87vette81big

Guest
That's Awrsome Grumpy !!!!

Was the 427 Truck Tall Deck Block used ?
That's the question for many here.
Dart of course maked BBC Tall decks along with others.$$$$.

Blow through Carb setup too.
Impressive .

I still Love Carbs best.
But want tp try Barrel Valve Hilborn or Crower stack injection someday.
 
8

87vette81big

Guest
That Racer is going to snap off the Ford 9" pinion shaft from pinion head eventual.
1.313" Shaft size only.

Needs A Dana 60.
 
grumpyvette

grumpyvette

Administrator
Staff member
points to ponder here!
http://www.intercepteft.com/calc.html
use of E85 allows the 9:1 static compression
(E85 typically has an octane rating of 105 octane but requires 30% more fuel volume to produce the same power)
the 345cc port heads would be too large, on a 496 displacement engine, for max efficient port air flow speeds, if it was not supercharged, with a turbo.
496 cubic inch displacement,larger forged parts and larger bore and stroke plus the large head bolts have a, at least in theory,a huge advantages over spinning a smaller displacement chevy LS series engine that seems all the rage recently.

Big-Block Chevy OE And Aftermarket Block Variants

Generation Gap: Big-Block Chevy OE And Aftermarket Block Variants By GREG ACOSTA AUGUST 07, 2018 When it comes to big-block engines, there are quite a few variants across multiple manufacturers. However, when you hear the words “big block” with no other qualifier, there is one engine that...
garage.grumpysperformance.com
 
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8

87vette81big

Guest
Racers tend to use equipment they are familiar with Grumpy.
I never seen the LS Engine as superior in 1400-3000-8000Hp Drag Racing.
Just a strong competitor .

Phil LOVES LS POWER.
I Love Pontiac Still.

The 87 Corvette may get the Tall Deck 427 eventual.
Want to know block HP limit. No one knows for sure here.

Pontiac 455 4.21" stroke & 496 ci 4.25 stroke.....real secret is the high piston speed doing the work.
2 Different head technolgies getting the job done.
 
philly

philly

solid fixture here in the forum
you want big LS power gotta use the aftermarket blocks and heads for the 6bolt per cylinder configuration... and there arent alot of guys with LS based combinations going 6.99 or faster. well there are, but it dont seem like alot compared to the other combos in the world. and e85 can run alot more than 9:1 compression DYNAMIC... nevermind static, im starting to think thats a made up number that doesnt really mean much.


apart from its higher octane ability the fact that its an organic alcohol means it makes the combustion literally cooler. alot of e85 cars have lukewarm to cool exhaust at idle if you put your leg up to the tail pipe. theres more going on than a 105 octane... its like a 105 octane with methanol injection on top.
 
philly

philly

solid fixture here in the forum
this guys going 4.30-4.40 @ over 150 in the 1/8th with an LS on a drag radial so its got atleast 1600-1800 horsepower

https://www.youtube.com/watch?v=mN8YboD-j18

https://www.youtube.com/watch?v=Fim_LVAHmAY

so theres guys out there doing it... but right now the masses are just doing motor swaps naturally aspirated on a budget and enjoying the reliable 11-12 second cars theyre building and i cant knock that... a dead nuts reliable, all i do is change oil, 11 second car is ALOT of FUN
 
8

87vette81big

Guest
The neat aspect of Pontiac V8 Engines Phil,
if you stick with old school factory iron heads the static compression ratio can be varied from 5.0:1 to 15.0:1.
Using 389, 400, 421, 428 , & 455 blocks & respective factory crankshafts.
Factory heads were all fully machined combustion chambers.
Not as high tech as modern heart shaped chambers but still work nice.
Most only need 32-34 BTDC Timing to make max HP On any gas normally aspirated.
Heads had from 53cc to 128 cc chamber volumes depending upon year & casting numbers.
No piston swaps required.
Swap the heads only...
 
8

87vette81big

Guest
9'S Flat or 8.99 1/4 mile & I will die a Happy Man Phil.
Gets way too expensive to run faster without sponsors kicking in $100,000-$1,000,000 bucks per year to keep going Real Fast.
 
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