427 SBF

600hp n/a small block street car is old news now in the LS world.
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Dude, you understand he's trying to get good with God?
Not go down the path to Hell...
 
Patriot Racer said:
For comparison, here are flow numbers for SBF AFR 220’s

IMG-9029.jpg
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One thing I find odd about weingartners flow tests..

The AFR 205s flow better than the afr220s on his machine except in 2 places, the .500 and .600 lift flow numbers.

Speaking of numbers, the promaxx heads on average (.200 to .600) are within 6 cfm on intake. The exhaust is where the afr's kick the shit out of the promaxx, 18 more cfm average.

But this is comparing the promaxx as cast vs cnc afr's, so really they are pretty fuckin good castings, but I wonder why the exhaust performs so poorly
 
BOSS#1540 said:
Good guess, you already knew, lol. 🤔
1-3/4" headers to fit foxbody. 3300lbs with me. Ran 11.7 at 125.4 mph, lol. I was leaving at an idle to not bust shit.
It dynoed 583hp, 503ft/lbs but i had a better intake and oil pan on it at the track.
I was happy after dyno. Very happy with it on the street. Buddy that helps me now says something wrong with that dog 🤣🤷‍♂️.
Lots to be said about having the right combo.
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You could have told me an hour ago and I would have forgotten by now! :)
I watch re-runs all the time because......... Over half the time they are kinda new to me, again!
 
BOSS#1540 said:
Hey! 🤷‍♂️
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The reason I say that is because years ago I went on Drag Week with a friend of mine.
At one point one of the fast cars drove along with our small group of cars.
Well, it was a Pro Mod, a real Pro Mod. But he stuck some big ass street-legal tires on it and drove right alongside us. We hit a HUGE, and I mean a HUGE rainstorm on our way back to Bowling Green. We all relied on Rainex to keep the windshields sort of clear. It was torrential rain. That same storm blew-out the timing system at the track.
But, that Pro Mod made it there!
It was "street legal" from Texas if I remember right.
 
89 Fox 427 said:
One thing I find odd about weingartners flow tests..

The AFR 205s flow better than the afr220s on his machine except in 2 places, the .500 and .600 lift flow numbers.

Speaking of numbers, the promaxx heads on average (.200 to .600) are within 6 cfm on intake. The exhaust is where the afr's kick the shit out of the promaxx, 18 more cfm average.

But this is comparing the promaxx as cast vs cnc afr's, so really they are pretty fuckin good castings, but I wonder why the exhaust performs so poorly
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Is now a good time to say flow numbers don't matter 😆🤣
I think it'll have a very nice tq curve. If you can call a straight line a curve 😉
 
89 Fox 427 said:
One thing I find odd about weingartners flow tests..

The AFR 205s flow better than the afr220s on his machine except in 2 places, the .500 and .600 lift flow numbers.

Speaking of numbers, the promaxx heads on average (.200 to .600) are within 6 cfm on intake. The exhaust is where the afr's kick the shit out of the promaxx, 18 more cfm average.

But this is comparing the promaxx as cast vs cnc afr's, so really they are pretty fuckin good castings, but I wonder why the exhaust performs so poorly
Click to expand...
Do the afr heads have raised exhaust ports or are they in stock location?
 
BOSS#1540 said:
Is now a good time to say flow numbers don't matter 😆🤣
I think it'll have a very nice tq curve. If you can call a straight line a curve 😉
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The coefficient of discharge is also better on the afr 205s than the 220s almost everywhere.

I'll take a straight line torque curve as long as it makes a hp line cross 600 for fucks sake
 
89 Fox 427 said:
One thing I find odd about weingartners flow tests..

The AFR 205s flow better than the afr220s on his machine except in 2 places, the .500 and .600 lift flow numbers.

Speaking of numbers, the promaxx heads on average (.200 to .600) are within 6 cfm on intake. The exhaust is where the afr's kick the shit out of the promaxx, 18 more cfm average.

But this is comparing the promaxx as cast vs cnc afr's, so really they are pretty fuckin good castings, but I wonder why the exhaust performs so poorly
Click to expand...

Raised exhaust ports vs stock location?
 
Stop looking at fucking youtube and weingartner's and vizard's and others bench racing dick pulling vids and listen to the people with already running fast cars. They all told you to buy AFR 220's or Trickflow raised ports. And you ignored them and now you are complaining that it won't make enough HP.... fucking hell @Steve439 :facepalm:
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Steve439 is just messing with you 'cause you keep bringing up LS motors in a SBF thread.
He has thousands of dollars in his motor, he's not going to put it in a dumpster and buy an LS.
 
Steve439 said:
Steve439 is just messing with you 'cause you keep bringing up LS motors in a SBF thread.
He has thousands of dollars in his motor, he's not going to put it in a dumpster and buy an LS.
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Don't worry, he typically goes back and deletes his posts after an ls bender. The post numbers all line up again..

It's not the engine platform that's the problem. It's the builder.
 
Shims didn't work. The crank is beveled. If I buy bigger shim it won't exactly be centered back there. No clue if the matters

20250624_150353.jpg
 
What does the shim look like that comes with the gold kit that was mentioned previously
 
There were no shims in my gold kit. No idea what the other shims look like, not even sure if they're for crank side or cam side
 
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