86 heads / mod

86 heads are HORRIBLE for flow.. my E cam doesnt even give as much power as it should bc of them and my gt40 doesnt flow as good as it should bc of them.. yeah they suck

(EDIT: Removed excessively negative comment)

I'm putting my engine together tomorrow -- a dual-quad tunnel rammed '86 H.O. -- and I should have it alive by the end of the weekend, so I'll tell you on Sunday how porting the hell out of the heads works. It oughta go like the proverbial raped ape.

I ported my '86 heads clear out to match my headers and gasket-matched the intake with my 289 tunnel-ram intake. I'll be running it with a custom cam with a longer intake duration (so as to come alive right where the secondaries start pulling on the tunnel ram), keeping the original .444 lift. (Safety first!)

The factory heads on the '86 are poorly designed but the '86 only makes 25 HP less than the '87, and I've read that most of that is from the exhausts, which makes sense because the exhaust ports are about the size of peanut shells and have that stupid nub in them, to boot. Porting your heads well should make a huge difference. Plus, the '86 heads have the shallowest torque curve of any of the stock heads, and torque, of course, is what you should be concerned about. I'm eager to see how mine runs.

Of course, this is all academic until I turn the key this weekend. I could be sorely misguided, here; but then, I am doing this myself. I'll keep you posted.

Nemesis, are you running an E cam in a stock '86 block?

ya e cam with gt40 intake.. basically doesnt help much since all the nice flow just gets the crap smacked out of it once it comes to the heads.. with whatever new car i get im just gonna put all the stock back on the 86 and put the e cam, gt40 intake, tb, maf, 24# inj, 1.6 rollers, headers.. basically everything the 86 doesnt need bc those heads kill it all.. cam just changed the sound.. actually less power with it instead of more since it kicks in at 3500 and the heads die at 3500

the e7 heads are cheap used. get those ported and make a ton more power than those crap e6's

Nemesis, you run the e cam without any p/v clearance issues on the stock flat-top '86 pistons?

yea.. they have enough clearance with a cam as long as its like.. less the .500.. which im cuttin it with the E cam and 1.6 rollers.. this bottom end hasnt been fly cut.. and the heads have new valves and springs.. but they still are crap..

daniel: can't, flat top pistons will murder the valves in the first 5 mins of runnin.. and im 15.. i cant affoard to pull down my driver car, put new pistons and everything else in it.. if i did that i would do a 306 kit.. but i need money out the *** to do that lol