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I have a vp efi 304 v8. which i am putting in a hx holden. the question i wanna know and would like your guys knowledge on whether to keep the motor as a 304 and make it strong. or is it cheaper in parts to just put a 355 stroker kit in it.
As it stand the 304 has 130,000 on the motor and in needs a total rebuild. so a crank grind, the bore is standard and may just need a hone etc. I have a brand new 218 blue racer cam shaft for it, 70mm throttle body ready to go on. so what else would anyone suggest for a decent street set up. (Flat top piston, compression, cam, injectors etc) or a good setup with this cam and throttle.
Or for the price of a 355 kit (new pistons, crank, rods, bearings, gaskets, etc) starting at the cheap end of the market $1500 is that a better option. And can anyone recommend pro-comp gear.
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They are pretty strong to start with. A rebuild with standard parts other than good pistons, new rod bolts and a new oil pump will see it pretty damn good. It will be no weaker than if you stroke it to 350.
If you go down the 350 path a COME kit at $19 |
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drury asked the question can anyone recommend pro comp gear please any feedback
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Hi all
I would also go the COME kit at $1990,dont know about too many other brands
and dont slag off about them just because of the names .I have known of come racing for a long time and never heard anything bad yet.So reading between those lines,thats |
Jim in Adelaide.. |
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COME does top shelf work. I agree.
These days you can get a SCAT stroker crank and rods for a very good price. I just supplied a 355 crank and H-Beam Rods for $1100 , Pistons are extra depending on what your doing with the motor..
SCAT also make a cra
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Thanks heaps for your knowledge. COME sounds like a safer bet! Now another question. What needs to happen to the block to get it ready for a 355 kit. i know its not as easy as just putting one in. things like clearances need to be done im told. Can someon
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Clearanced in the base of the bores for the rod bolts. Simply copy off a mid VR onwards 304 block (or use one of them). The block you want is one that is blank on the side where yours will say 5.0.
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a few more questions about the stroker, would a mild 355 be equal to a wild 308/304?
What pistons are used on 355 some? sort of off the shelf chev?
When you get a crank balanced do you get the balancer and flywheel/flexplate to suit.
Can you use standa |
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No. 350 will have more torque.
Depends upon rods. If you use a crank with Holden big ends you just use Holden 5.7/350 pistons. If you use a crank with LJ Chev big ends then pistons are different. I think you can use Chev 377(aka383) stroker pistons with |
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what is the offset on a stroker crank with 5.7? and you would use just standard chev 5.7 pistons for that crank? i see alot of 3.48" cranks that use a 5.627"rod. |
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A Holden 5.7 is 350 cubes. Same bore/stroke as a 350 Chev ie 4" bore, 3.48" stroke. The only difference between available cranks is one uses a Holden big end so you use standard Holden rod (HT to VSIII 253 or 308) and the other uses a Chev big end so you |
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Byron, you're on the money with those ebay cranks. Seen 2 failures in the last 2 months with my own eyes, and there's been more reports on forums around the place too.
Cheers,
Mick
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Cheers,
Mick
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Byron, youre on the money with those ebay cranks. Seen 2 failures in the last 2 months with my own eyes, and theres been more reports on forums around the place too.
Cheers,
Mick
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Cheers,
Mick
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The cheap cranks to stay away from are -
Pro Comp (on ebay and in car magazines)
RPM (sometimes on ebay)
CAT (sometimes on ebay)
The Good cranks are -
SCAT (on ebay and in car magazines)
COME Racing (Car Magazines
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another question, i have a set of mild ported HQ heads with L34 valves they come of an engine that made 250rwhp on a 330 stoker. now for my LC torana i already have extractors to suit these heads and a redline maxi torker. so to run VN heads. the manifold Edited by user Monday, 1 September 2008 1:46:55 AM(UTC)
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Sounds like a much better deal for you running the HQ heads. They will work just nice.
Of course the VN heads are better for making a bit more power, but with a HUGE $$$$ changeover cost for you.
Better off spending your money on a crank & pistons rathe
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sorry they are HT/HG heads not much diferant i dont think? does a scat crank come balanced? and i will be using A9L rods. now i have to run 10.5:1-11:1 comp for this type of cam i know the block has been decked in a previous rebuild and would say the head Edited by user Monday, 1 September 2008 5:03:20 AM(UTC)
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You will need to measure head chambers, measure if block has been decked, look at different piston options and head gaskets to work out your engine compression. Lots of work involved, this is the difference between professional engine builds and a back ya
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I usually try to do a profesional job i have rebuilt diesel engines and transmissions on underground trucks and loaders at work and rebuilt standard 308 and a 253 just never a 355 which is why all the questions. will balance my rods and pistons myself but |
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Bundy
Talk to COME before you do anything. Their 350 kit includes nearly everything, and comes completely balanced ready to go. You'll find by the time you add up all the stuff you'll need to do it yourself it's not that far off, maybe you'll be paying |
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