Hi guys, I have a stock set of 416 (early 305 tpi perimeter bolt) heads on my 327 because the 58cc chamber gives me around 9.6:1 compression w/ flat top pistons. The 1.84 valve size is a little small considering my cam size but not the end of the world -- the short stroke 327 will pump less air per stroke than a 350 would. I also have a set of 081 heads (nearly identical to the 416 but better spark plug placement, and center bolt valve covers) that I will end up porting at some point. However, for now I am running the 416s uncut. My combo is the following

1967 327, .030 over
Holley Stealth Ram
I burn my own chips and datalog
Isky 280 HL flat tappet hydraulic Cam (.485/.485 lift, 280 adv duration, 232 @.050) Manufacturer's rated powerband 2500-6800 rpms. I usually shift around 6300
untouched 416 (305) heads 1.84/1.5 stock valves
dual mandrel bent 2.25" exhaust w/ dynomax race magnums
BW World Class T5
3.73 gears

This car ran 14 flat spinning really bad, at 99 mph back when it was carbureted and had 350 open chamber heads (7.8:1 compression) and had the same cam -- it was waaay overcammed for the compression and had a muncie 4 spd, but still ran that well. I haven't been to the track yet but the car definitely runs stronger with the multiport EFI, great tune, and compression ratio that matches the cam a lot better.

How fast has anyone gone with STOCK 305 416 or 081 TPI heads? Carbureted vehicles included. I'm especially interested in non 305s w/ stock 305 heads, but 305s count too. Also how fast have you gone with midly ported, STOCK VALVED 416 or 081 heads.

Thanks!

 

Anybody?

 

On my 305 I had stock 081 heads and was running 13.80'S with bolt on's and 99 MPH.

 

my 081 heads had larger valves so I was not stock

 

Thanks guys. Sounds like these heads are not the end of the world when I expect to be running high 13s.

 

13.9 with stock 416 heads

 

Hey roughskin, are those 416s on the 350? Thanks

 

yeah 350

 

Stock 305 heads on a slightly modded 305, in a 92 Formula, went 13.90s, once! This was at a fast track (Island dragway), in great air. Normally, the car ran 14 teens all day long.

 

[B]

Wow! I just realized how old I'm getting. That was a long time ago.