AG porting pictures
I should have the after flow numbers about the 3rd or 4th of February and then if Scody21 doesn’t care we can post them. Scody21 has some dyno numbers but that will be with iron heads and a different cam but maybe he will post them.
So the current 340 setup in the car now is...
1969 340 at .040 over with Fed Mogal L2316f-40 forged pistons, scat I beams.
J heads with 2.02/ 1.60 valves not ported, just machined, port cleaned new seats and valve job.
Comp cam 20-228-4 AKA XE285HL-10 xtreem high lift installed at 105.5 (yes we know, not a great cam selection. That’s why we’re changing it)
Comp springs at 1.65 at 140# open. running comp 1622-16 roller tip rockers and comp lifters. With the rest of the goodies like HV oil pump, air gap intake, MSD 6AL, pro billet distro, holly 750DP, mini starter, TTI step headers etc....
On the dyno, after brake in, adding the 2nd springs and dumping the green juice and adding fresh green juice (penn grade) we got the following on the Northwest Dyno services dyno, which is a Superflow 902.
382.8 TRQ at 4,400
364.4 HP at 6,000
We did run to 6,800, but the cam was tapering off at 6,300 and I can’t find the sheet from that run. Was not super happy with the cam and power delivery to 3.23’s through a 4 speed. The motor is way happier with the 3.91’s. This all was before YR curved my disto/ 6AL and found issues with the box retarding and did some carb tuning.
Thus why YR is porting the eddy heads and intake, we’re also going to change the cam for something that’s more auto cross / road race focused as that’s how I have this car set up. My 70 duster is going to be the 1/4 mile car...
