Guess the HP session

[Cudatali]

Volunteering my build for a keyboard dyno session LOL. Just curious what the experienced forum members think my current build will output.

440 .030 over
L2355 pistons flattop 4v relief
Trickflow 240’s
SFT .534/.540 239/242 @ .050 112LSA
10.5:1 CR
6bbl with port matched Edelbrock intake
1-7/8 longtube headers

Thanks for any feedback.

Also my goal was a mildly aggressive streetcar going in my 69 RR backed by a 727 and 3.55’s. I plan on using A/C in the car. It’s the car my wife enjoys cruising in so I want it to be a great comfortable cruiser. Brakes are manual. Do you guys think my build will achieve its objective?

 

[PurpleBeeper]

575 hp engine dyno

 

[WileE]

Is there a prize for the closest guess ?

 

[eldubb440]

is this like the price is right? 576

 

[496 polara]

I think it will do what you want it to.Should cruise without bucking,spitting,or jerking and have plenty of torque so you won't "need" a high stall converter.
550-575 HP.

 

[RR Fan Dan]

504 RWHP

 

[dvw]

I am building nearly the same combo for a freinds wife's car. With the exception that it is a .030" over 440 with a 4.50" stroke crank. 10.5-1, 6 pac, headers, TF 240's hyd roller 235/241 .564/.572 on 112 lca. Going a V code 70 Challenger with 727, 3.54 Dana.
Doug

 

[70bigblockdodge]

I'm sort of on the same page.
Same pistons
SFT cam 264/[email protected] .578,.584 ,107 LSA
Using some seriously modified iron heads (probably way worse than ootb 240's) and my measured CR is 11.17:1.
I know all would be better with aluminum heads, but I already own the iron ones, and that gives me room to improve. I was hoping to get 550. You will probably be at that and have a better driving engine.

 

[DanielSlocum]

500 -525 hp at the flywheel.

 

[451Mopar]

I'll guess 530 HP

 

[Sahara]

I gotta go 525, also. Torque should be good.

 

[fullmetaljacket]

Torque band should be good enough to be shaking your pants throughout. I'm not even thinking HP, but taking a crack at it, I would suspect 550.

 

[oldkimmer]

I am building nearly the same combo for a freinds wife's car. With the exception that it is a .030" over 440 with a 4.50" stroke crank. 10.5-1, 6 pac, headers, TF 240's hyd roller 235/241 .564/.572 on 112 lca. Going a V code 70 Challenger with 727, 3.54 Dana.
Doug

Except it’s 100 inches bigger

 

[dvw]

Except it’s 100 inches bigger

Come on, it's only 92 inches bigger. Had a repaired 4.50" Molnar crank and set of 7.100 Molnar rods. Bought a set of Mahle pistons, pins, rings that fit that stroke and rod length for a good price. A guy gave me a motorhome block, Won a ATI damper in contingency from racing. Somewhere along the line ended up with a timing chain cover and a set of main studs. So it was time to pay back a friend. He donated the short block for my racecar 14 years ago. So now I'm donating parts and labor.
Doug

 

[PRHeads]

Because the numbers can vary greatly between dyno services, I’ll stipulate that my guess is what I’d expect to see here………

I’m in that 550-575hp range.

 

[451Mopar]

I think the heads flow more than the 6-pack intake which might limit the power?
Cam is a bit on the mild side, but should make a great street engine!

 

[RemCharger]

Optimal would be 620. Deduct 25hp from the 6 pack intake.

 

[33 IMP]

I made 500 crank with a bit more cam, and way worse heads (mild bowl blend 906s).
I think the 240s are at least 50 better than mine, so..... 500tq/550 hp.

 

[Sahara]

I agree with @33 IMP, only with the numbers reversed. My 511 with an almost identical build made 535hp and 580tq on the dyno with bigger headers and pump gas into a Holley Sniper.