Just curious
What kind of Power has anybody seen these heads make ?
As in "whats the most anybody's made with them" ?

I've worked on & off over a few years with a set for a Customer, actually far beyond whatever someone ever SHOULD do, because far better Heads out there, but, nonetheless, I'm a sick puppy, and as long as I could just go over them again, while refreshening the Engine over the years, a little here, a little there, it was OK and kept burnout away.

Anyways, just Dyno'd the 540 using the "magic" SR's and got 849.2 hp @ 6700 rpm and 753 Ft/Lbs @ 5100 rpm.
Unfortunately, I DIDN'T Flow them before I put them back on this time !

Now you're really gonna laugh !
Using Crane Gold Rockers and a 230# seat Pressure grind Roller(easy on parts)
We just cycle the Gold's out about every 250 pulls or so, but they work fine.

So, how far have you guys seen SR's go ?

I'm now officially DONE with them !

Awesome numbers! That has to be on the high end of what SR's will make for sure! Good Job!

what car, weigth and what did it do 1/4 mile

what is the whole combo

The Car is a 74 Dart Sport, a White one. He's on his way home now to Install, and slam to make Vegas next week.

He used to run real low 9's @ 150-151 ? in the 2800 lb Car, but at 2300 ft elevation(Edmonton)
I think he's gonna get an 8 now in Vegas next week with the SR's
Too Funny !

540 Combo
Mega Block 4.500
Source 4.250 Crank
Source 7.100's W/2000 upgrade
J.E. 13.7 Slugs
INDY SR (highly modified, but NO welding & still 2.19
INDY Intake, downthroat adaptor
Dominator
Comp .690 Roller(easy on parts, 230 # Seat)
CRANE GOLD's

Real "K.I.S.S." Deal.
I've made lots more Power, but always with 440-1 or 572's. But thats my BEST with an "SR".

any pics

what was the cam, lift /duration

An 8 might be tough then, figure he's only "up" about 30 from before ?
Shoulda Dyno'd last time I re-freshened last year, woulda had better reference from 2 years before that(up 60 from there).

340cfm MW sized SR's, 13:1 493 RB motor, bracket roller cam, dynoed 736hp.
has gone 8.73 @ 156 in a 2600-ish lb A body, in like 1400ft air.

its a bit of an over achiever.

I've got a set on a 493 with a stock block. It made 773hp on the dyno.

I have set on my low deck 512. It made 810 hp and 712 ft pds of torque with a small roller. I have gone 9.50's in Edmonton in a 3200 lb car. My buddy has gone 9.00's with the twin to you customers car with a 451 low deck stroker in his Demon. Both sets have been ported - Mine by Jeff at Modern - his were done locally.

A guy that lives north of me Jerry timberman I believe ran a rail a few years back 470 low deck with sr heads made around 910-930 hp. His had epoxy in them mainly on the pushrod walls. I think he went to bigger heads and a aluminum block. He had a website and might have even had been in a magazine.

The little 446 that Dwayne put together for me made 688 on his Dyno with SR`s. So far the best ET has been 10.09 with a DA of 1700 ft through Flowmaster 2 chamber mufflers last July N/A.