Got the heads back, flow numbers post

[69 N.O.X. RATT]

I got the heads back today. I was hoping for a little more peak flow #s, but am more than impressed with the low and mid lift areas. These are Edelbrock ovals tested at 28in Intake: cfm .200 / 148 .300 / 242 .400 / 282 .500 / 305 .600 / 313 .650 / 318 .700 / 322.5 Exhaust cfm .200 / 130 .300 / 155 .400 / 179 .500 / 210 .600 / 220 .650 / 222 .700 / 227 Looking at the heads it is obvious there was a lot of work done to them. The chambers have been laid back a lot and looking down the ports on intake and exhaust sides shows almost no untouched area. The Victor jr. was also matched to the intakes. The work on the Victor jr. goes all the way up the the plenum area. The heads were also flat milled .035 to raise the compression to almost 11 to 1. The chambers are 110 cc stock they are now 108. The porter assured me the milling would not weaken the heads enough to worry about running NOS Does anyone see any problems, i.e valve train geometry, etc. Any thoughts are appreciated

[korvetkeith]

Yeehaw, looks like you might be makin 600+ on the motor.

[Glenn454]

Great numbers John! Did you flow the heads before you had them ported?
You should make some serious power. :)

[427Hotrod]

Great numbers. You can feed 600 HP with those with enough cam. Which you have!

Were the exhaust numbers done with a test pipe?

How long before it's running?


JIM

[69 N.O.X. RATT]

Glenn,

The heads were flowed before. I will post the numbers when I get the rest of the paperwork back.

Jim,

I should have asked but I do not know if they were done with a pipe or not. I should have it back together in 2-3 weeks.

When is yours going to be done.


[Modified by 69 N.O.X. RATT, 4:31 AM 4/15/2003]

[427Hotrod]

I'm working on it, but work is been awful busy. Plus I got sidetracked a couple of days this last weekend because the Top Fuel guys were in town and I had to go out and get my annual "nitro fix"!!!

I got new TTII's installed with bigger tires, plumbed line lock last weekend, shortblock is all built. Cam sent out for a little "upgrade". Had a bad rocker, so Comp is rebuilding them under warranty. Had to return a bunch of fuel fittings. Summit decided somehow that along with all that Aeroquip braided line and A/N fittings, I must have wanted half of them to be push-lock type! Hopefully this weekend I'll install the Aeromotive fuel pump, regulator and tank sump possibly.

Still waiting on my heads, so I know what you've been through. Then I gotta port intake etc. Lots to do, but progress is being made.

I really wanted to make the Forum Cruise in...I dunno if I can pull it off. Time is getting tight. But spring is here and it sure hurts to have a convertible sitting in the garage!

Keep us up to date on yours. You're ahead of me!


JIM

[norvalwilhelm]

Good numbers Glenn and with the formula of CFM x .257 x 8 cylinders you get a rough idea of what the heads can support for horsepower.
But this doesn't take into account intake loss. An intake can easily take 20% off the numbers and if it reaches 25% they recommend a different intake.