MRL Performance
Well-Known Member
Here is our latest build fresh off the dyno. Its not a Barn burner but interesting non the least.
Its for a racer that runs in a restricted 2bbl class and has to run stock un-ported heads, stock iron intake, yup you guessed it un-ported. Limited to 11.1 to 1 compression, .500" lift, 1 Holley 4412 2bbl carb, non roller cam.
We built his last engine and he Wiped the track up with those silly little 350 chuvys. Won every race but 2 and took the Championship by a mile. That was a 400 and it broke an axle shaft and tore up a trans, those were the 2 races he didnt win. The rest were run-aways for him. That 400 made 357HP 455TQ.
This year we upped the ante a little with a 440. 1 class up from the 400 engine so the rules were a little more free, but not much. Little bigger solid cam, small tube shorty headers, and roller rockers. Thats about it.
Power time.
HP peaked at 4800-5100 at around 410HP
TQ peaked somewhere below where we started, but made 490+TQ from 3000-4100
This is not bad considering the setup. Stock UNPORTED 452 heads with 2.08/1.77 valves and a 1967 bone stock 4bbl intake. 239/251 cam with .500" lift.
I know I know, GOLD AND BLACK???? Its the color scheme of his main sponsor so we had to bow down to that a little.
Its for a racer that runs in a restricted 2bbl class and has to run stock un-ported heads, stock iron intake, yup you guessed it un-ported. Limited to 11.1 to 1 compression, .500" lift, 1 Holley 4412 2bbl carb, non roller cam.
We built his last engine and he Wiped the track up with those silly little 350 chuvys. Won every race but 2 and took the Championship by a mile. That was a 400 and it broke an axle shaft and tore up a trans, those were the 2 races he didnt win. The rest were run-aways for him. That 400 made 357HP 455TQ.
This year we upped the ante a little with a 440. 1 class up from the 400 engine so the rules were a little more free, but not much. Little bigger solid cam, small tube shorty headers, and roller rockers. Thats about it.
Power time.
HP peaked at 4800-5100 at around 410HP
TQ peaked somewhere below where we started, but made 490+TQ from 3000-4100
This is not bad considering the setup. Stock UNPORTED 452 heads with 2.08/1.77 valves and a 1967 bone stock 4bbl intake. 239/251 cam with .500" lift.
I know I know, GOLD AND BLACK???? Its the color scheme of his main sponsor so we had to bow down to that a little.
. And 400+hp either side of 5k with that combo is another "feat of strength". You are the Man. :thumleft:
