Hi folks! I can get this zz4 alu heads #10088113 really cheap.At the moment i have a bone stock '69 300hp 350ci out of a camaro in my ride.The "041" heads. Valve's are the same size,but i heard good about the flow on those newer heads. Whats you're opinion,worth the swap? Thanks, Ollie
I say yes. The combustion chamber design is way advanced on the ZZ4 heads. It is the same as that in the Vortec iron head (that out flows the ZZ4, by the way) and was derived from the LT1 chamber of the late 90's. You will need to do a lot of work on the 041 to make it an even comparison.
Thanks Scotty! I know i'll need a vortec intake.But what about exh manifolds(yeah,i know..)? Will my straight plug manifolds fit these angle plug heads? Ollie
Ollie i have a set of those heads on my dirt modified 350 engine they really make a difference in performance. The combustion chambers are 58cc and have no problems getting spark plugs in or out with my old headers. Hank 37
do a zz4 hydraulic roller cam and you'll really like the difference. There are zz4 take out cams all over ebay new. I bet the plugs would work - especially if you get shorty plugs - got a picture of the current exhaust manifolds?
Yep, you're on the right track. Plug clearance may be tight, but no worse than any previous design. Watch the compression ratio and make it up with a gasket choice as needed.
Actually the ZZ4 heads do not require a Vortec intake. The standard old pre Vortec intake bolts right on and works great. The exhaust ports are D ports but you can port your straight plug manifolds to work and the spark plugs clear easily. Plus ... I like the fact that the ZZ4 heads are aluminum. They save you about 50 pounds over the iron heads. That's 50 pounds of weight right off the front end
Hi Hank,good to hear from you! A local guy is upgrading,so i will chime in gladly.Dunno what cc my 041 heads have,but i can get 100okt on every pump here so comp can skyrocket a bit..LOL..(if you don't look at the price). @tudor:I know roller is by far the best,but then i have this new comp XE274H flying around.. I used exh manifolds from a monza/vega,since they were the only ones i could get in my 58 at that time.Very narrow in there,and they don't let you modify the frame too much here.Its a gov security inspection thing... Ollie
Hey deuce,thats really good news!Glad i can keep my(not so hamb,but) fast brodix intake. Man,I'm onto something.Gotta be prepared for next season..haha.. Thanks everybody, Ollie
In some cases ( not many in my opinion) technology is a wonderful thing. Those are prolly the best GM heads you can get for a small block.
Actually, the ZZ430 you (and I) have uses the aluminum head #12464298 or the #12367713. 10088113...88-up...350..........Aluminum, 58cc, angle plug, raised "D" port exhaust, 1.94"/1.5" valves 12464298...99-up................"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake port, 2.00/1.55 valves, 62cc chamber
CORRECT ... But I had a ZZZ 350 cubic inch 345 HP crate engine with the #10088113 heads in the roadster before I got the ZZ430 ... The ZZZ crate was a forerunner of the ZZ4. Chevrolet had the 1) ZZZ 2) ZZ1 3) ZZ2 4) ZZ3 and then 5) ZZ4
In any event- all these aluminum heads are superior to the old heads even though the 041 is a decent casting for it's day. You can make them look more traditional by painting them black or engine color.
Good cam choice - you'll love it. I have an xe268H in a 383 with alum heads, it runs real well. Just doing the heads wouldn't be as impressive as adding the cam at the same time. Keep us posted on how it goes! Prost.
From memory, the 113 heads are the second version of the '80's Corvette aluminums, when they went to D shaped exhaust?? They are very well covered, as are the 041's, in Dave Vizard's book on Chevy heads...full flow information and highly detailed porting instructions and tests.
Cool,im gonna look out for the vizard book as well.These are d-ports,Bruce. Thanks for all the infos! and "Prost!",Tudor. Oh,yeah:Can someone do the compression math for me? My '69 350 is advertised as 10:3:1 with the 64cc chamber. How much will the 58cc heads rise that on a standard bore+stroke? I'll be using a standard blue felpro gasket.All i can get here.. Ollie
The ZZ4 engine came from Chevrolet with a .051 thich head gasket to help keep the compression down. I would use them if possible. Aluminum heads usually require a different head gasket
I plugged in the 64cc to my calculator using a .028 gasket and got 10.29 to 1. Changing to 58cc it jumped to 11.07, add the .051 gasket to get 10.44 to 1.
Ok,guys i'm gonna use the recommended gasket.Have to buy it stateside. Even though i would love the 11:1! Ain't no fun in changing head gaskets all the time,cause they were the wrong type.. I'll let you know how the deal worked out.And esp how the performance went up. Ollie
I once bought some take-off Corvettte parts from the place that built expensive turbo vettes...I have a set of German Mahle flattop pitons that came on late small block corvettes that the man said gave about 11;1 as standard equipment with the 113 heads. He said this was OEM and worked fine!
Yeah,thats my idea Bruce.They say aluminium heads can tolerate a full point compression more on the same setup.That and the very high octane fuel available here makes it very tempting! I had a 11:1 4 banger in my 57 opel wagon,that i built for E85.But just with a little less timing it ran flawless on gas.Cast pistons and all.. I don't know,GM says on there website to use "a steel flame ring head gasket".. All blue felpros i used had that feature. What do you think? Ollie
they take a regular intake with 6 bolts per side.....those heads were out waaaay before the vortec , as they were a factory head on the 85 or so and up corvette.
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