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[R72K5]

kjhgfds

 

[75-K5]

According to Mortec they are 76cc heads off a 71-72 400sbc.

 

[DesertDueler2]

I would just use your 882 heads. My friend has had really go luck using those heads on his bracket car. He has those heads on a 9:1 compression motor with an edlebrock performer rpm, holley 750, headers, and dual exhaust. His bracket car runs low 14s. Its an all steel 65 malibu.

Dan

 

[R72K5]

882s ar ebad they warp and one is burnign oil really bad foulidn g plug
i always throw away 882 they are all junk and risky to run

i just got done rmeoving another set of 882 from another CMJ 1974 cast 350 engine cuz drive side one was burning water real bad, they were both warped badly

882 are complete crap heads, cannot trust them for a second, just liek gov lok units, same deal!

i will never do anything with 882 cept put in scrap iron, they are total crap, too risky to use, those who run them and no problme are ticking time bomb and are damned lucky, also the 624's they are light cast and crack all the time, 78-85 or so years mostly on 350 engines also,



so these 493 are 400 heads cool




thanks

 

[beater_k20]

Randy, you are aware that 882s are one of the best vintage small block heads available short of double humps, right? all small block heads with 1.94+ valves are prone to cracking just like you claim the 882s are so bad about.

 

[dyeager535]

I think his comments are about how light the castings are. I know nothing of the '882's, but I KNOW the Vortecs have thinner castings than other heads, (and they are 1.94's of course) which can lead to problems you might not see with heavier heads. At the very least you can't mill them as much as a head with thicker material.

 

[R72K5]

882 are total crap im not gonna sit and argue about i know they are from personal experience, many a time have i seen 882 heads ruin a perfectly good 350 or 400 engine due to warpage and/or cracking, they are total crap,

however each to his own, as in all cases in this life,
if you run 882 and no problems then yay go buy a lottery ticket cua youre one lucky mo-fu!

also i would run any voretec any day of the year, i have neve rheard of nor sene any problem associated with any later light cast heads such as vortecs, never, ever, no worries there

just with the 624's and the 882's, these are the two gm heads to junk, they are not worth the iron they are cast/smelt from, by any means, but unfortunately they are one of the top most mass produced heads from gm, so everyone runs them, its really sad,,

for your reading pleasure: http://hotrodders.com/forum/t61029.html


last post in this one:
http://www.hotrodders.com/t61029.html&highlight=882


6th post down into this thread on the vortec heads:
http://www.carkb.com/Uwe/Forum.aspx/gmc/2123/Dissappointed-in-the-350


and yay after some previous research i found that the 493 heads are 68.8 cc :
www.nhra.com/tech_specs/engine/blueprints/CHEV-71.rtf





thanks

 

[beater_k20]

also keep in mind that there are no Vortec heads out there that are over 10 years old. they havnet been subjected to the heating and cooling cycles that many older heads have, so there's less chance of them cracking, even though they are a "lighter duty" casting. working a GM service parts counter at a dealership, for 2 years, who services several fleets of K3500 Vortec 5.7 equipped trucks, i have yet to see a set of Vortec heads that were cracked, despite nearly 300,000 miles on some of them. i also havent heard of a set cracking anywhere else. the deck surface thickness on the heads is nearly identical between a set of Vortec heads and a set of 882s, besides cracking issues were between the valve seats, and didnt have anything to do with the deck surface itself. BTW, 882s are heavy castings.

 

[R72K5]

also scroll down to 882 section: http://www.chevytalk.com/tech/engine/SBC_Heads.html

for reading pleasures.,

oh and this thread; another good one:

http://www.hotrodders.com/t4743.html

and starting about third of way down page here too: http://srt.suddenlaunch.com/index.cgi?action=display&board=gm&num=1082764310&start=135


:P

 

[beater_k20]

keep believing everything you read on the internet Randy, especially since it has no credible source or proof to back up the statments. demolition derby board as fuel for an arguement on engine performance? give me a break!

 

[R72K5]

keep believing everything you read on the internet Randy, especially since it has no credible source or proof to back up the statments. demolition derby board as fuel for an arguement on engine performance? give me a break!

grow up..


thanks