69 camaro running in the 10s - Page 4

SSRSBOB · #31 01-09-2010, 09:46 PM

Just found another round at the Dutch Classic race. Look at the wheelstand here. 10.58 on the brakes. Both cars ran too quick by one. Wow. Great eye candy for Stock Eliminator.

https://www.youtube.com/watch?v=L-2GZtY9REY

Bob

70 ls6 convert · #32 01-28-2010, 08:34 PM

Well i tore down the ram jet 502,what a big bore ,ive decided im gonna build that for my car,i dont want to run the fuel injection unit i want to run a nice intake and carb,its an older 502 looks like 2000 build,from arizona speed and marine,the bore is 4.5 inches and the stroke is 4 inches, could i put a 4.25 crank in this engine,the heads look pretty nice alum 12363391,the rods are pressed in,i have it all torn down, every thing looks realy good,the pistons dont have a part number on them but they look low compression,what i was thinken is higher compression bigger cam and a 4.25 crank,any advice would be greatly appreciated Thanks again kris...

**markjohnson** · #33 01-28-2010, 11:04 PM

You have the makings of a great combination there. Eagle makes a 4.25 Stroke crankshaft that will go right in that Gen 6 block. You'll have yourself 540 CID. Eagle also makes complete Crankshaft Reciprocating Assemblie that will include a forged crankshaft, H-Beam rods, and either high or low compression pistons. I'd also slide in a mild streetable solid Roller camshaft too (NOT a hydraulic roller!) and you will have one bad-ass motor that will have very little or no equal to whatever pulls alongside you!

VintageMusclecar · #34 01-29-2010, 12:46 AM

You can actually slide a 4.500" crank in there with a little extra work and a few extra $$$...with a 4.500 bore you've got 572".

At that point traction becomes a rather serious issue...

**mockingbird812** · #35 01-29-2010, 12:56 AM

[ QUOTE ]
You can actually slide a 4.500" crank in there with a little extra work and a few extra $$$...with a 4.500 bore you've got 572".

At that point traction becomes a rather serious issue ...

[/ QUOTE ]

...in a GOOD way!!

**markjohnson** · #36 01-29-2010, 03:11 AM

I've owned & fooled around with these big engines quite a bit and I've built 540 CID's based on GM Gen 6 502 blocks and you can get a 4.25 stroke crankshaft for less than $800. A 4.500 Stroke crank starts to get pretty expensive. Plus, I've NEVER seen or heard of anybody making a 572 from a short deck block such as the 502 CID. I'm sure it can be done with terribly short connecting rods in that short deck height block but it's really just not a good idea. Even on GM's very own 572 Crate motor, they avoided that 4.500 stroke crank shaft and chose to only go with a 4.375 stroke in a Tall deck block. 540 CID short deck engines have become immensely popular and represent the best bang for the buck.

VintageMusclecar · #37 01-29-2010, 03:58 AM

...............

-edit-

No need to further derail the OP's topic...

70 ls6 convert · #38 01-29-2010, 04:22 AM

Thank you so much,Thats what route im goin 4.25 crank,When i order the rotating assembly,do i want to just order a new fly wheel and balencer and get the whole setup ballenced,and then on the cam side im racing a 4sp m22 and 373,whats the best cam set up and valve spring for my engine thanks again kris...

**markjohnson** · #39 01-29-2010, 05:07 AM

Something nice about the newer Eagle 540 Recip. assemblies is that they come Internally balanced compared to the older Externally balanced ones. You can also have the choice of .250 or .400 longer rods but with the short deck of your block, I think I'd go with the .250 longer rods just to try to keep the wrist pin out of the lower ring lands. As far as camshafts go, pick your favorite camshaft company with a solid Roller with around 250-260 @.050 lift, .650-.670 lift and 110 degree lobe centers. Use the recommended valve springs of whatever camshaft you choose. Now, you're really pushing the outer limits of your particular cylinder head casting and while there would be power to gain from a larger head, I think you could still get away with using the heads that you have. With the stock location exhaust ports on your heads, just make sure you used a dual-pattern camshaft instead of a single pattern and that it has about 8-10 degrees more duration on the exhaust lobe. I don't know what you're going to use for an intake manifold or what kind of hood clearance you have but I'm a big fan of Dart intakes and 950-1000 4150 Double Pumpers. While we seem to have drifted off topic a bit here, I hope this information is helpful and if I can be of any more assistance, just PM me. Thanks.