[vin63]

Originally Posted by Tom Vaught

This is the ORIGINAL POSTERS (fastgoat's question). NATURALLY ASPIRATED.

Uneasyrider added a second question in the middle of the thread.

You answered Uneasyrider's part of the question but not the original question.

Tom Vaught

I didn't realize we're not allowed to answer additional questions in a thread without answering the initial post.

[Half-Inch Stud]

Originally Posted by vin63

I didn't realize we're not allowed to answer additional questions in a thread without answering the initial post.

I think VIN63 has the prize for making AND running at > 2HP/ CID using a 40 year old cast iron crank.

Billet
Forging
Factory cast iron <-- hey let's build a 6second blown funnycar using that.

[vin63]

Originally Posted by Half-Inch Stud

Billet
Forging
Factory cast iron <-- hey let's build a 6second blown funnycar using that.

It was all we could afford at the time and through good machining we made it work to that point...the old castings are a lot better than today's overseas castings. We were able to buy a forged crank last summer, and have been running one since. I was only addressing the question about factory block strength.

[Tom Vaught]

Originally Posted by vin63

I didn't realize we're not allowed to answer additional questions in a thread without answering the initial post.

Do not think I ever made up that rule.

If we had been talking Boosted engines I would have or Marty P would have mentioned his 1967 Factory Block that lived with over 1600 HP or 4 horsepower per cubic inch on methanol for a few YEARS using a Factory RA-V 400 forged Crankshaft.

But since you opened up the topic, Stan's Boosted Engine and Scott's Boosted Engine (Marty's friends) both made a lot of power using factory parts, over 2 hp per cid. Marty built both engines.

Tom Vaught

[NHRASuperStock455SD]

Horsepower = cfm x HPfactor x 8

HP Factors
reg Bracket Eng .240
Good Bracket Eng .250
Super Stock engines .270 to .295
NHRA Comp style engines .300 to .320(some single carbs some duel carbs)

My 455SD is .280(low compression)
HP = .280 x 8 x 305 = 683HP

Stacy's 428 is .310(13 to one)
HP = .311 x 8 x 305 = 759HP

Turbo engines are built for handling boost, heavy pistons, billet rods, piston below the deck causing severe quench trying to run nomally aspirated. They also have small headers limiting HP without the turbos on so typically peak torque is higher than peak HP. Tony's flow bench is a little off so we use the corrected values per Tom Vaught's awesome flow plates for a correction curve for more accurate results. It is spot on!

HP = .320 x 8 x 400 cfm = 1024HP
HP = .320 x 8 x 470 cfm = 1203HP

Higher cubic inch engines make more power. So we are hoping for a bit more on the 620 eng. We have seen Tony show big numbers, we are up big time. Langer is up big time. Phil Monteith is up big time. Tony gets numbers higher than most. We cant wait to get these engines on the dyno/track.

[Dragncar]

What about the 2.15 claim on KREs website with High Ports ? said NA, not sure of the cid.