Bob on the "other" site Jon posted dyno results between the AFR 325's, P51's and his new SR-71 heads all on the same short blocks, one 521, the other 598........so very interesting........
Yes i seen that..........what's interesting is the p-51 made more than afr on both the 521 and 598.........and almost 50hp more on the 598..........WOW!!
That link was just a picture. Is there a link to an article along with it? Those are some impressive numbers. I'd like to read more about what is below the SR-71's.
So long post worth the read! Charlie Evans Presley Rae Wilkerson, and Jon Kaase dyno tested my intake manifold today against an Afr,Victor, and a Mafia. The results are as followed.
Number 1 The Air Boss
Number 2 The Mafia
Number 3 The Victor
Number 4 The AFR
The test was run with the same fuel and no vac pump, and all manifolds were out of the box. THE MAFIA IS A VERY STRONG COMPETITOR as it was down a little in torque and about 15 hp, the victor and AFR were down 60 horsepower, thats right 60hp! We wanted a true apples to apples test, thats why all testing was done with a spec fuel and no vac pump. SPECIAL THANKS TO THE TWO icons above and the nice young lady for putting this together! Case closed the Air Boss is the most powerful out of the box single four manifold almost available period!
MOST people will never have an engine that large (611) or run those intakes on an eng like that , would love to see the test of those intakes done on a 500 to 540ci engine AGAIN
Block sonic checked. Bored .080 over. Plenty of meat in the block. No core shift. DOVE 4 bolt block with custom caps.
SR-71 heads. 1.75 rockers T&D shaft system.
Billet solid roller from Bullet. 276/289 .755/.740 111.5
Racetec custom piston 12.5:1
New 1300 cfm E85 Dominator from Horsepower Innovations. Mafia intake.
Locked MSD dizzy at 28. Will try 30. Kaase made his best power with his 521 dyno mule at 28.
Hoping to see 1000hp.
This is the engine I’ve done for Dragweek this year. Went 9.70’s last year with “issues”. We’re losing weight, picking up at least 250hp and playing with the converter and rear gear. Hoping to see an 8.9x
Thanks Bob. I went back and looked. You are correct. It was 938.9hp. Here’s the specs on his short block:
“Callies 4.3 crank, Lunati 6.8 rods, The cam is Comp 273-280, 109CL .460" lobe, 1.73 Comp rockers.
Pistons are Diamond shelf flat top with 1/16, 1/16, 3/16 rings. No gas ports. .020" deck clearance. It's all pretty tame stuff
Compression is 12.4”
We have more cam, more displacement, more carb and a vacuum pump with the same compression. We should definitely make more than 940. We might not get to 1000 but it should be close.
Correction: Kaase made his best power with the SR-71s at 27 degrees not 28 degrees.
Oh yeah I wanna see this too I wanted to get the Boss 9 heads for a build in my F350 4x4 Good luck!
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