Pushing coolent?????
The et sounds right but what about the trap speed I thought that was what showed horse power? They are Arp bolts that were torqued to 94lbs. I have never messed with Arp bolts before so I just torqued them down the first time and left them at that, but I've talked to afew different people and they said they needed to be torque cycled.
60' 1.71
1/8' 7.02@103mph
1/4' 10.76@132mph
That was the 243 heads fast intake/tb stock head bolts and 22degrees of timing. I had ran that setup with 24deg before with no issues.
So now with the 317's and Arp head bolts it won't hold 22deg for more than two pulls.
I can tell you this. I ran to about 950 rwhp without water problems. After that, oring receiver groove, retorque, 1/2 " studs over torqued, thick deck heads, special head gaskets $500.00, rub your belly while eating peanut butter with a special snap on pink edition torque wrench. I've tried all of that!! Your wasting your time and money!!!! Btw, the heads don't lift. The cylinders move around letting combustion in the water jacket = you push water! TRUST ME.
The only reason I say ease up on the timing is that everone usually gets about 900 + rwhp before pushing water.
Good luck.
The only reason I say ease up on the timing is that everone usually gets about 900 + rwhp before pushing water.
Good luck.
My 10.7 pass was on a 26in Dr with some wheel spin and shifting into od.
60' 1.71
1/8' 7.02@103mph
1/4' 10.76@132mph
That was the 243 heads fast intake/tb stock head bolts and 22degrees of timing. I had ran that setup with 24deg before with no issues.
So now with the 317's and Arp head bolts it won't hold 22deg for more than two pulls.
60' 1.71
1/8' 7.02@103mph
1/4' 10.76@132mph
That was the 243 heads fast intake/tb stock head bolts and 22degrees of timing. I had ran that setup with 24deg before with no issues.
So now with the 317's and Arp head bolts it won't hold 22deg for more than two pulls.
my next-door neighbor who owns a well-known machine shop for 5000hp blown hemi's suggested that i torque the heads from the outside in, apposed to gm sequencing. he said it would help from "squeezing out the gasket." i said what the hay, and tried it. so far so good. 17psi at the track. gm 5-layer, std arp studs, iron 4 bolt block, AFR heads.
the tune is VERY important in keeping the heads down. KEEP TIMING LOWWWWW. i only run 15*, and i have zero problems making stupid power. don't mess around with pump gas on higher boost either. i FINALLY got that through my head. it's just not worth the aggravation. i even had the boost up to 21psi on the dyno. so far, so good. not a drip
the tune is VERY important in keeping the heads down. KEEP TIMING LOWWWWW. i only run 15*, and i have zero problems making stupid power. don't mess around with pump gas on higher boost either. i FINALLY got that through my head. it's just not worth the aggravation. i even had the boost up to 21psi on the dyno. so far, so good. not a drip
Thanks for all the input guys and I will keep the timing down for now. But this still makes no sense what so ever that I ran higher timing with a higher cr before this head swap. (243's vs 317's) can anyone explain that?
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