Club Cobra - How do you make an 815 CI engine ?

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- - How do you make an 815 CI engine ? (http://www.clubcobra.com/forums/all-cobra-talk/92738-how-do-you-make-815-ci-engine.html)

CobraEd

10-31-2008 08:37 AM

How do you make an 815 CI engine ?

With all the gear heads here pushing the "limits" in so many posts, why has no one here done this??

http://www.youtube.com/watch?v=htTogHf153E

.

Silverback51

10-31-2008 10:18 AM

If I remember right, the Mountain Motors that the IHRA Pro Stock boys run are all at 800 Cubic Inches.

nevermind65

10-31-2008 10:50 AM

Just contact this guy...he'll build it for you.

http://www.jonkaaseracingengines.com/engines.php

CobraEd

10-31-2008 11:35 AM

I guess what i don't get is that we have a huge argument about if you can build a 582 from an FE or not:

http://clubcobra.com/forums/showthre...threadid=91730

And then you see an 815 CI engine. What do they use a Mack Truck block ??? :confused:

Obviously not, but then what ????????????????

.

John Owen

10-31-2008 01:07 PM

They are custom aluminum blocks with wider bore spacing and higher deck. With hemi heads, the 815 is 36" wide and much taller than a 460.

Fordzilla

10-31-2008 01:52 PM

Quote:

Originally Posted by CobraEd (Post 894243)

Hi Ed, If I am not mistaken, The max you can safely go with an aftermarket 427 block (Pond, Genesis, Shelby) is 542. The max on a factory FE is 482 & it has to be a true 428 stamped service block. Not just a service block with the extra webbing but a stamped 428 service block with the thicker cylinder walls. The max on a Ford 385 series block is 815 & they are run by the Top competitors in NHRA & IHRA producing about 9000 hp.
Come to think of it, I wonder how they Dyno them?? :eek:
Just my 2 cents.
Regards,

wtm442

10-31-2008 03:37 PM

Quote:

Originally Posted by Fordzilla (Post 894288)

The max on a Ford 385 series block is 815 & they are run by the Top competitors in NHRA & IHRA producing about 9000 hp.

9000 HP ??????????????????

Try about 1800 to 2000 HP in a Top Sportsman car.

What class in NHRA allows an 815 cu in motor?

Great Asp

10-31-2008 03:56 PM

Quote:

Originally Posted by wtm442 (Post 894329)

9000 HP ??????????????????

Try about 1800 to 2000 HP in a Top Sportsman car.

What class in NHRA allows an 815 cu in motor?

Top Fuel, and on a good day Top Alcohol get up to 8,000 hp @ 456ci?

456ci is tops right?

E

Tom Wells

10-31-2008 04:49 PM

Here's a bit of info about top fuel from Kenny Bernstein's web site:

Quote:

Engine

Supercharged 500 cubic inch TFX aluminum hemi V-8 block

Bore & Stroke
4.19 x 4.50 inches

Horsepower
7,000 to 8,000

Acceleration
Zero to 100 miles per hour in .8 seconds
Zero to 275 miles per hour in 3 seconds
Zero to 330 miles per hour in 4.5 seconds

I understand they can go 0-60 in one car length...

Here's the pro stock mountain motor info from Jon Kaase's site:

Quote:

815 Cubic Inch Pro Stock Ford HEMI Engine
1700+ horsepower

Since the deck height is much greater than the production block based engines, you could probably fit one of these in a Cobra if you moved the hood upward by about a foot...

Fordzilla

10-31-2008 05:08 PM

Quote:

Originally Posted by Great Asp (Post 894339)

Top Fuel, and on a good day Top Alcohol get up to 8,000 hp @ 456ci?

456ci is tops right?

E

Hi E, Yes, Top Fuel. Tony Schumacher runs 500 cubes. I'll try posting a link to a good read. I don't know if it will be a hot link or if you have to copy & paste into your search engine.

http://www.edmunds.com/insideline/do...ticleId=120159

Also, I think the Pro Stock & Pro Mod classes run 815 cubes. Anyway, The Top Fuel & Pro-Stock/Mod engines are incredible & huge dollars. Just to stand next to one when it's launching is an experience all by itself.

Regards,

Silverback51

10-31-2008 05:42 PM

All Pro classes in the NHRA are limited to 500 CI engines.

Tom Wells

10-31-2008 06:14 PM

Quote:

All Pro classes in the NHRA are limited to 500 CI engines.

Correct!

Sorry to confuse by not being more specific: IHRA allows "mountain motors", currently topping out around 815 cubic inches :eek:

MChat

10-31-2008 06:18 PM

From the 2008 NHRA Rule Book...

Pro Modified:
No supercharger: 820
Supercharged: 527

Top Alcohol Dragster:
No supercharger (uses nitromethane instead of methanol): 456
Roots supercharger (methanol): 528
Screw-type supercharger (methanol): 466

Top Alcholol Funny Car:
Roots supercharger: 565
Screw-type supercharger: 528

Pro-Stock: 500

Top Fuel Funny Car: 500 (also has a minimum of 490)

Top Fuel Dragster: 500 (w/ 490 minimum)

Fordzilla

10-31-2008 06:34 PM

Thanks for posting the rules. I didn't realize there was a minimum in the 2 top fuel classes. That's interesting.

Silverback51

10-31-2008 07:04 PM

Quote:

Originally Posted by MChat (Post 894389)

I forgot about the Pro-Mod class. Thanks for correcting me.

Rick Parker

10-31-2008 08:44 PM

If you think this will fit in a Cobra ..Think Again. This is 698" Kaase from a couple of years ago:

[IMG]http://www.clubcobra.com/photopost/d...cubic_inch.jpg[/IMG]

MChat

10-31-2008 09:07 PM

Quote:

Originally Posted by Silverback51 (Post 894399)

I forgot about the Pro-Mod class. Thanks for correcting me.

No problem. :) I wasn't trying to "correct" anyone though, just had the book here at my desk so I looked it up and posted what I found.

I didn't realize how "limited" the Top Fuel class really is. Basically it looks like everyone is running the same car, it's just a matter of how good your tuner and driver are.

I also didn't realize that you could run a Naturally Aspirated dragster on Nitro in Top Alchohol either. I wonder if anyone actually does that?

wtm442

10-31-2008 09:16 PM

Quote:

Originally Posted by MChat (Post 894433)

I also didn't realize that you could run a Naturally Aspirated dragster on Nitro in Top Alchohol either. I wonder if anyone actually does that?

Quite a few run that way, and a couple are always in the running to win any race.

Rick Parker

10-31-2008 09:37 PM

The nitro cars that run in TAD generally get beat by the tuning as they are much more difficult to get right. They often put out a cylinder during the run.

Silverback51

11-01-2008 06:35 AM

Quote:

Originally Posted by Rick Parker (Post 894441)

The nitro cars that run in TAD generally get beat by the tuning as they are much more difficult to get right. They often put out a cylinder during the run.

That's the problem.

If they run good, they have a real good chance of winning. They just need to keep all eight cylinders lit.

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