077 aluminum heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69trk · 07-25-2009, 07:30 PM

What do you guys think about a set of aluminum 077 gm heads? rectangle port with valves, studs, guide plates and have been ported for $750.00 dissassembled. 225 /188 valves. do you think they will flow better than my 14097088 iron heads with tons of work done to them? And if so, is this a good price? thanks

Marv D · 07-26-2009, 11:13 AM

I am not a bigblock guy at all, but if that is for the pair of bare castings, that is still pretty cheap! However, if it's not the ultimate head that you want,, it's a waste. As far s what flows better,, if neiher have been on a flow bench,, it's a guess. I've seen "tons of work" not help sbc heads one bit (in fact hurt low lift volocity and flow so bad it makes them useless for anything other than WFO at the track) and I've seen it turn them into some really sweet heads. So again were back to the flow bench.

Super73 · 07-26-2009, 05:44 PM

Flow benches give you a lot of good info, but they are not the end all be all.. To Marv's point there is good info to be had with them, but flow numbers do nothing if there is a huge valve with bad valve angles and hogged out ports compared to a head that has a little less flow numbers yet smaller port/valves to keep velocity up. Reversion can be the enemy at low RPM. Add to that, the cam profile needs to be matched to the heads, intake and exhaust.

With out comparing the full setup it's a crap shoot.

Ont67shortbox · 07-26-2009, 08:08 PM

I would take them to a machine shop first and have them checked.As mentioned porting can hurt if not done correctly,your also dealing with 40 yr old technology,there are some excellent heads out now at decent prices that may flow better,with more advancements than the 077s.

BossHogg69 · 07-27-2009, 03:24 PM

Those are the "winters" big block heads. They were produced as a racing piece and where the shiznit in the 70's. Even against some of todays stuff, they perform well, esp the factory iron rectangle ports. I think the intake ports are like 295cc or so, and a C-shaped exhaust port. Of course, if you know your 088's perform well and are happy with them, the only advantage you'll likely reap would be the weight reduction. Depending on what's been done to your 088's I'm not sure you'd be blown away by swapping heads.

07-25-2009, 07:30 PM	#1
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	077 aluminum heads What do you guys think about a set of aluminum 077 gm heads? rectangle port with valves, studs, guide plates and have been ported for $750.00 dissassembled. 225 /188 valves. do you think they will flow better than my 14097088 iron heads with tons of work done to them? And if so, is this a good price? thanks __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=494388 431 big block times, changed to a 6.0 ls with turbo 1.58- 60' 7.18- 1/8th mile@95.18 11.37- 1/4 @115.81

07-26-2009, 11:13 AM	#2
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: 077 aluminum heads I am not a bigblock guy at all, but if that is for the pair of bare castings, that is still pretty cheap! However, if it's not the ultimate head that you want,, it's a waste. As far s what flows better,, if neiher have been on a flow bench,, it's a guess. I've seen "tons of work" not help sbc heads one bit (in fact hurt low lift volocity and flow so bad it makes them useless for anything other than WFO at the track) and I've seen it turn them into some really sweet heads. So again were back to the flow bench. __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.

07-26-2009, 05:44 PM	#3
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 077 aluminum heads Flow benches give you a lot of good info, but they are not the end all be all.. To Marv's point there is good info to be had with them, but flow numbers do nothing if there is a huge valve with bad valve angles and hogged out ports compared to a head that has a little less flow numbers yet smaller port/valves to keep velocity up. Reversion can be the enemy at low RPM. Add to that, the cam profile needs to be matched to the heads, intake and exhaust. With out comparing the full setup it's a crap shoot. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 Last edited by Super73; 07-26-2009 at 05:45 PM.

07-26-2009, 08:08 PM	#4
Ont67shortbox Registered User Join Date: May 2003 Location: Ontario Posts: 279	Re: 077 aluminum heads I would take them to a machine shop first and have them checked.As mentioned porting can hurt if not done correctly,your also dealing with 40 yr old technology,there are some excellent heads out now at decent prices that may flow better,with more advancements than the 077s. Last edited by Ont67shortbox; 07-26-2009 at 08:09 PM.

07-27-2009, 03:24 PM	#5
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: 077 aluminum heads Those are the "winters" big block heads. They were produced as a racing piece and where the shiznit in the 70's. Even against some of todays stuff, they perform well, esp the factory iron rectangle ports. I think the intake ports are like 295cc or so, and a C-shaped exhaust port. Of course, if you know your 088's perform well and are happy with them, the only advantage you'll likely reap would be the weight reduction. Depending on what's been done to your 088's I'm not sure you'd be blown away by swapping heads. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!



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