Limited Late Model HP question

[RCJ]

One other thing that screws with numbers is how the motor is set up on the dyno.Electric water pump,header and exhaust , ventilation system (fans),air bell.How hot is the oil and cold water.A good dyno man can jack the numbers and you will never now it.

[swingarm4life]

My all time favorite dyno number response is from Byron Koury. He built us a limited engine to run Ga, Fl, and AL with. I asked him what it made on the dyno, his response was "enough". That was it, and he never cracked a smile. So if you want a no nonsense guy who doesn't sugarcoat it and who doesn't fudge the numbers, he's your guy. Builds some bada$$ engines too. We asked him what we need to turn it, he said "as much as your pocketbook can take, but I recommend around 7500-7600". lol

[old17ford]

He's got Mastersbuilt in his screen name, but i happen to know he still has a soft spot for them swingarm cars from indiana!

I think he is a little kin to CJ ! I mean that in a good way . I know he loves swingarms .

[LateModel B23]

About 10 years ago had a local guy back out on buying one of the my used motors after he saw the dyno papers on it. He felt that the numbers were just too low for the way it ran all season. We had won almost every heat, a couple of trophy dashes and finished 2 in points for the year. It was a SUPR spec that only peaked at 603 and he was convinced that there was something wrong.

[RW57]

We here the same crap about the motors we run .4 eyebrow hypers 600 Holley 425 lift cam smog heads cut to 70cc min 1.94 1.50 valves l would figure an a good day maybe 350 HP. I have about 1500$ in our motor. We race against people who pay 8 to 10 grand who their engine builder claims makes 450 HP on the dyno I call BS all I know is my junk is as fast as their high dollar motors if it blows next already have another 1500 grenade ready by the way the motor is 4 years old I have freshened it once. By the way it has stock rods with stock rod bolts with God knows how many miles on them and is not balanced .

[LeafMaster41]

My all time favorite dyno number response is from Byron Koury. He built us a limited engine to run Ga, Fl, and AL with. I asked him what it made on the dyno, his response was "enough". That was it, and he never cracked a smile. So if you want a no nonsense guy who doesn't sugarcoat it and who doesn't fudge the numbers, he's your guy. Builds some bada$$ engines too. We asked him what we need to turn it, he said "as much as your pocketbook can take, but I recommend around 7500-7600". lol

How do you get in touch with Byron Koury?

[Krooser]

FWIW... I bought a small block Mopar 383 a few years ago that came out of a WISSOTA A mod. A brand name, small town builder did the original complete build. With an obsolete Mopar 590 cam and some mildly ported W-2 heads/intake that flow just north of 300 on the intake the dyno sheet showed 575 HP @7200 RPM... now that's a number anyone can believe in.

We've come along way from what we ran 30 years ago as far as HP goes but we haven't come to 700HP+ iron engines AFAIK.

[perfconn]

700hp is entirely within reason if you use the right parts.You can't do it with convenital 23* heads like Dart Platinum and flattop pistons.If you want 700hp out of RHS raisedrunner steelheads then it is very possible.In fact you can make considerable more than 700hp but it wouldn't be a good dirt track engine because of the need for torque to get you off the corner.I sold one 360ci raised runner steelhead to a dude in Delaware that made 714hp but it didn't race worth a darn and I had to put a smaller cam in it to get it off the corner.

[Krooser]

You're right about the 23 degree heads and the driveability deal with some engines.

[President Clinton]

So y'all have went from impossible to its possible? Like I said in the beginning, by the series rules the original poster asked about 690- 700 is reachable. And as far as contacting John about my motor, you are totally confused.The motor I have is his, RHS not raised runner, meets series rules,and makes the power I stated. So before you put down another builders claims, maybe you should get your facts about the engine in question before you "assume "? By all means please contact John about the motor he has in Ga. Maybe he can give you some insight on the hp obtainable by this combo? Also ask him why it wasn't swapped to raised runner? The 15-20 hp wasn't worth it. Thanks for finally coming full circle on steel motors.

[perfconn]

You sir have a problem understanding what you read.The original poster never put a HP number on his post.He asked what was possible,you were the one who said 690-710 HP
As for your engine that you have for sale.It is the one I asked John about & no one said it was a RAISED RUNNER.That is the reason it will not make 690-710hp.If you will take that engine to Phantom Race Engine and it makes 690-710hp then we will buy it just to see what's in it.Now put up or shut up.

[President Clinton]

I never said the hp it had? I said 690-710 was achievable? What did John tell you it made? You spoke with him? It is close to 690. I never questioned your engine for sale, but why don't we dyno mine without raised runners right beside the 700+ hp raised runner one you have advertised? If mine is not close to yours, I apologize. If it is then you lose face value. I am not an engine builder and very seriously doubt I would get into an argument questioning another's integrity if I were. Doesn't seem like a very wise business move to be on social media doing that. But to each there own.

[perfconn]

I am not questioning John's integrity.He builds some fine engines,You are the one that said a standard RUNNER 23* engine would make 690-710hp.There are some very knowledgeable people on here and you can't make unreasonable claims without expecting to get called out.

[President Clinton]

I said my 23* engine has right at 690.I guess accusing someone of fudging dyno numbers isn't questioning their integrity? If you talk to John like you say why not ask him instead of get on social media and argue. I know you haven't spoken to him about me. The motor is big bore, short stroke, roller cam, everything done that will remain "in the rules" and it makes what I said on his dyno. Like I said I will come put it beside your raised runner on your dyno and one of us will be wrong. You will never gain trust and respect in business arguing with a potential customer on social media. All your idea of "calling me out" has done, is brought attention to the fact you could be wrong. If you don't want to continue acting like kids on here pm me, I will give you my phone # and gladly talk to you. Otherwise continue on.

[fastford]

i might be wrong to prez, but i would have to see those numbers myself. I have two friends with dynos , one in childersburg Al and the other in south side AL close to the old green valley speed way , if you guys want to duke it out, i will set it up...