Well we just got home from the dyno with the 370 inch motor. you can't wipe the smile off my sons face. He built this thing with a little guidance from me but he did all the core work he bored, honed, ported the heads and intake. He did all the over size valve cutting and assembly. I did the Burton rocker conversion on the heads but for the most part he did it all. This is the basics of the combo.
The crank was cut for a set of Yates NASCAR take out rods the crank was stroke to reach a stroke of 370 inches.
Pistons are a set of wiscoe pro tru 3.8 Buick forged pieces we used the rings that came with them.
The rods are steel 6.300 1.850 big end with pressure oiled pins.
Cam is a custom competition components pieces ground for us as a blower motor cam
roll master 9 key way
new front cover
73 iron heads ported by a 16 year old to 235 intake 195 exhaust Burton machine rocker conversion with prw roller rockers
ta dual plane intake ported by my son also
with no boost we used a 750 vacuum secondary pro series p^%-F*&M
and when we but it on boost we used a 650 quick fuel blow thru unit (thanks Doug)
So here are the numbers
N/A it made peak torque at 4800 @ 449 ftlbs HP was at 5300 and was 422.
this thing was an animal with torque at 3500 it made 423 and never dropped below 400 until 5500 and was still 396
Then we added a P1SC procharger and with 6LBS yes I said 6LBS it made 588 FTLBS of torque and 630 HP all of that on 92 octane peak HP was at 6000 and peak torque was at 5200 but once again 4000 it had 549 ft-lb’s and at 6000 it had 551. we started the pull with the charger at 4000 we figured not point in pulling it down lower than that we set cruise and idle AFR's just loading it down low. this thing will idle at 700 all day long it is crisp and clean it is going to make a hell of a driver for sure
I LOVE BOOST
I do have another pulley but I did not have a shorter belt and to be honest he doesn't need anymore power he 17 now for Christ sake. he will start out N/A then once he is comfortable he will get the belt and off he goes.
I know allot of guy's have been waiting on this so I hope you all are as happy with the results as us.