496ci revamped

So Your Hellcat still has more HP in the real world yet.

The 496 is powerfull.
New 112+4 will deliver additional power, justify the expense & labor to install.

Peak torque is 500 rpm higher than I want mainly because of the good airflow present in the AFR 290 Oval ports.

Cam is a bit Funky as I call it because its made for EFI use.

4000-6500 A good range for drag race.

4500-6500 a 2000 rpm window to work with, toirque converter choice will make make or break.

Mufflers kill power in a BBC.
Think Hooker Aeroflow best bang for the dolllar. Sound Great too ! Not too loud but have Race authority on the gas.
 
Definate lose the Pypes mufflers.
Don't trust that add.
I know those TA pro tour guys...hanging on and it died 100 percent in the Corvette world.
Drag Race Street Outlaws Took Over !
 
One advantage, I have cutouts
So at the track I can crack it open
The way I put O2 sensor in at it is 22" from cutout which at least 18" recommended.
I just have to create a map for it
As well as map for e85 which is cheap
At 2.10 a gallon around here.
 
Another 496 I'm helping on of my brother in law's we're trying to get it done before June
Mechanical fuel injection methanol
15:1 compression. Shooting for 900hp
Or more, it's a tall deck so he was able to go with longer rods 1.6 rod ratio
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Maniacmechanic1 said:
So Your Hellcat still has more HP in the real world yet.

The 496 is powerfull.
New 112+4 will deliver additional power, justify the expense & labor to install.

Peak torque is 500 rpm higher than I want mainly because of the good airflow present in the AFR 290 Oval ports.

Cam is a bit Funky as I call it because its made for EFI use.

4000-6500 A good range for drag race.

4500-6500 a 2000 rpm window to work with, toirque converter choice will make make or break.

Mufflers kill power in a BBC.
Think Hooker Aeroflow best bang for the dolllar. Sound Great too ! Not too loud but have Race authority on the gas.
Click to expand...
But Camaro is 1000lbs lighter then the hellcat
 
Speedlink1973 said:
But Camaro is 1000lbs lighter then the hellcat
Click to expand...
Not really a big factor drag racing after 300 feet.
Comparing Corvettes C5 1997- to 2019 C7 Corvettes at 3500-3700 lbs.
C4 actually ideal to drag with at 3200 lbs.
No one sees them as drag competitive and gave up on them. Became street cruisers.
Took too much money to make a 10 or 9 second car...someday like to make my 87 c4 10 second fast....have to literally throw everything away Chevy built in the drivetrain. Build a real drag car.
Chassis is awesome otherwise.
 
Nice.

Speedlink1973 said:
Another 496 I'm helping on of my brother in law's we're trying to get it done before June
Mechanical fuel injection methanol
15:1 compression. Shooting for 900hp
Or more, it's a tall deck so he was able to go with longer rods 1.7 rod ratio
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index.php
Click to expand...
Nice.
1.7 : 1 Rod ratio is real good in a 496 BBC.

Most say it does not matter R/S ratio.
Most part it's true.
Street and cruising most.
Never see above 4000-5000 rpm those guys.
Drag Race entire different ball game.
1.77:1 is Ponch 350- 389-400. Known to wind up fast with compression used.
TA 455 will have R/S ratio like 421 has.
Extra long rods Ti.

Some Engine simulators I have used show a 40-50 Hp gain higher R/S used.
HO Racing my favorite.
True or not find out.
Build it. Race it. Know for sure then.
 
what length connecting rod and what piston pin height are you using, building the 496 BBC?
yes Im assuming its a tall deck 10.2" block and a 4.25" stroke

a 4.25" stroke,6.8" rod and 1.270 pin height, for that 10.2 deck height block

6.8" rod divided by a 4.25" stroke=1.6 ratio

displacement = bore x bore x stroke x 8 x .7854

1/2 stroke + rod length+piston pin compression height,
should roughly equal block deck height ,

plus or minus a few thousandths,
minor adjustments in compression,
due to head gasket thickness and what the piston deck height is are common

http://garage.grumpysperformance.co...-about-your-potential-dream-bbc-combos.14607/

http://garage.grumpysperformance.co...od-rod-length-too-stroke-info.510/#post-10311

http://garage.grumpysperformance.co...onnecting-rod-rod-length-too-stroke-info.510/

http://garage.grumpysperformance.com/index.php?threads/measuring-rod-and-pin-heights.3760/#post-9968
 
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Grumpy said:
what length connecting rod and what piston pin height are you using, building the 496 BBC?
yes Im assuming its a tall deck 10.2" block and a 4.25" stroke

a 4.25" stroke,6.8" rod and 1.270 pin height, for that 10.2 deck height block

6.8" rod divided by a 4.25" stroke=1.6 ratio

displacement = bore x bore x stroke x 8 x .7854

1/2 stroke + rod length+piston pin compression height,
should roughly equal block deck height ,

plus or minus a few thousandths,
minor adjustments in compression,
due to head gasket thickness and what the piston deck height is are common

http://garage.grumpysperformance.co...-about-your-potential-dream-bbc-combos.14607/

http://garage.grumpysperformance.co...od-rod-length-too-stroke-info.510/#post-10311

http://garage.grumpysperformance.co...onnecting-rod-rod-length-too-stroke-info.510/

http://garage.grumpysperformance.com/index.php?threads/measuring-rod-and-pin-heights.3760/#post-9968
Click to expand...
Yes I was incorrect 1.6 not 1.7 6.8 rod
And 1.27 pin height
 
Hey guy's, I got a bit off track with my project.
New cam installed it revs to 6500 now
I did a compression test on all 8 cylinders

Lowest one to the highest one.

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Speedlink1973 said:
Hey guy's, I got a bit off track with my project.
New cam installed it revs to 6500 now
I did a compression test on all 8 cylinders

Lowest one to the highest one.
Click to expand...
Looks pretty good.
Should be just fine on premium gas like Shell 93 With Nitro .
E10 just tune for it.
Stochiometric correct is 14.3 :1 light part throttle cruising on highway for E10.
Not 14.7 :1 as stayed often that's for pure 100 % uncut unleaded gasoline.

Race gas 110 is 13.0 :1 Stochiometric at light cruise.
 
Maniacmechanic1 said:
Looks pretty good.
Should be just fine on premium gas like Shell 93 With Nitro .
E10 just tune for it.
Stochiometric correct is 14.3 :1 light part throttle cruising on highway for E10.
Not 14.7 :1 as stayed often that's for pure 100 % uncut unleaded gasoline.

Race gas 110 is 13.0 :1 Stochiometric at light cruise.
Click to expand...
I'm switching to pump E85
My understanding is it's 102 to 105 at the pump 110 ish from a barrel of VP
 
Speedlink1973 said:
I'm switching to pump E85
My understanding is it's 102 to 105 at the pump 110 ish from a barrel of VP
Click to expand...
Ok .
You want to Tune then in Lamba Wide Band O2 . It's #1 to watch and get the Tune set to it. Main Reference.

1 Lamba is Stochiometric correct for E85 and all fuels.
E85 at pump is allowed by federal law to vary + - 15 percent.
More gasoline is added in our Midwest Indy and IL fall, winter , and early spring weather for easier engine startup.
And it's hard to light off E85 engines built for race when stone cold in the morning.
Only a Magneto gives the hot spark to light off cold easy.
Not going to work with your New Edelbrock EFI system.

Can buy E85 pure consistent from VP racing fuels and others. 5- 55 gallons at a time.
Kinda pricey then. Not far off from 110 race gas.
 
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