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I have a very nice used 350 2 bolt Bare Block, which i want to do up into a mild but grunty performance street car. Before i get started , What are your suggestions as to the type and size of pistons ,Rods and Crank ETC I should go with that wont break the bank
I have a nice pair of Power Pac Heads with Roller Rockers to go on it.
Matt
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My 2 cents worth:
Scat (or similar) brand new 3.75" stroke nodular crank (about $400).
Cast pistons to suit.
Standard LJ Chev rods with new bolts.
You might be able to use the powerpack heads with the 380 or so cubes, but you'll need pretty big di |
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anyone got any other suggestions, what i can do ?
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WHY CANT I USE FLAT TOP PISTONS
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You can, but not with a 350 with powerpacks, unless you intend to run 10.5:1 compression, big overlap cam and 98 octane fuel. None of which are normally associated with a mild street engine.
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Agree with everything Byron has said, except with the 882 heads, these Chev units don't have the heat riser, which would be of use with unleaded fuel. My choice of head would be the 624's with 1.94 inlets, and 1.5 exhaust with a 76cc chamber. These heads
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By heat riser do you mean the exhaust crossover? If it is all the 882 heads i've had have all had it. The only ones that i've had missing it are the 292 heads. As far as I knew 882 heads are stock unleaded 76cc large port 1.94/1.5 valve 350 or 400 heads.
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Yes Byron the crossover, you are correct all 882's are 1.94 and 1.5, except the 3238882 which are 2.02 and 1.6
The above heads were from 1968 and 1969 fitted to 350 and some 400 blocks, but did not have the heat riser and were leaded fuel heads only.
33
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Its all good info, but Just getting back to the Pistons, do you think " 383 CHEV DISH TOP HYPER PISTON +040" would do the job ???
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or maybet these " Chev 350-DH 1.560/4.030/.927/1 "
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The "383" Chev dish top +0.040" will work if you use a 3.75" stroke crank and your bore needs to go to +0.040". But it won't be a 383, it'll be a 385cui engine (people often call a 3.75" stroked 350 a 383, but it's really a 377 - 383 cubes is at 30thou ov |
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GREAT ADVICE AND INFO. i think i'll look at some other heads, more suitable.
Thanks a lot
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Do the calcs first, once you find some big dish topped 383 pistons. They might be alright with a blower piston, if you can find a hyperutectic in a blower piston.
The other problem powerpacks have is they don't have any accessory bolt holes making it dif |
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Hi Byron, The Book " How to rebuild a small block chev ".. is the Jim Richardson one OK
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The one I have is by David Vizard, published by HP books.
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I CAN GET A HOLD OF A SET OF THESE
Speed Pro Hypereutectic Coated pistons # H859CP +30
CHEV 3.75 stroke, 4.030 bore with 5.7" rod and Holden strokers
-12cc dish giving approx
9.5:1 with 64cc head
9.1:1 with 72cc head.
I AM NOT SURE HOW MANY
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I'm pretty sure they are 64 or 67cc. OzChevy will probably know.
The book I told you about has photos of combustion chambers so that you can compare to your heads.
If the info is right then those are the pistons for you, assuming the block is OK at 30th |
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Hi all,
the Power pack heads were casting number 3927186 and were in production between 1968 and 1972.
Two valve set sizes available with these heads 1.94/1.5 and 2.02/1.6 (This I thought was not correct, but have researched Sallee Chevrolet website and
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Powerpacks were much earlier than that. They were around on 4BBL and twin 4BBL '56 or 57 Chevs. IIRC they carried through into the later rocker cover designs too. They have a single triangle casting mark. The pair I have at home are off a '58 I think. The |
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Thanks Guys, The Numbers cast on the heads are 854484 - E28 76
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