I think the new Scat Cadillac rod could be a great buick rod. Hbeam with 2.250 big end and with 1" pin or .990 bushed. 7" rod for $355 price from rocketracing. With a .090 over chevy flat top piston would be just above the deck. A little off the top and new valve notches, volla! A light, strong 461.55cui BBB short block. Anyone see a problem? http://www.realoldspower.com/phpBB2...0&postorder=asc&highlight=buick+rods&start=30
What size rings does that piston take? 1/16 or 5/64? Also, is the big end of the rod the same width as Buick?
I am not sure about your chevy pistons but I run a 6.7 inch bbc H beam rod with a Keath Black piston that I cut the positive dome off. This puts the piston .0020 down in the cylinder and gives me about 12 to 1 compressoion ratio.The valve realiefs provide plenty of clearence for a .51 inch lift cam. The motor has a well ported set of iron heads a Performer intake manaforld with a 850 cfm Holly carb. This runs my 3000 lb GS10 down the drag strip in 11.1 seconds @120 mph OH did I mention that our avrage air density is about 5800 feet. Ron J PS I bet your are wondering what a GS10 is. See above pix.
6.7 rod with the piston .020 in the hole. Is that a 1.88-1.90" piston? Mopar? Sounds like a cool build!
Guys, We have sold a 470 Cu in combination for almost ten years with a 6.800 BBC rod and a custom piston. We off set the crank to 3.950 with the journal at 2.200. In the last couple of years we have modified a 6.625 Pontiac rod to Buick dimensions so you can use it with the Wiseco pistons on a stock crank.
Mike, Is there a specific reason you use Wiseco pistons with the Pontiac rods? Have you used other brands of pistons with the Pontiac h-beam rods in BBB? What is the total displacement achieved with the Wiseco piston Pontiac rod combination ? Thanks
Mike whats the cost of the Pontiac rods compared to buying a Chev rod? And can you use any other piston like Ross for a Buick.
I started modifying the Pontiac rods when the Wiseco's came out because they were an economical way to use upgrade the rod. The Pontiac rod is bushed so it only works with a piston (any piston that is meant to use a stock length Buick rod) with locks. The Wiseco piston is 4.350 bore so you get a 464 cu in. The Modified Pontiac rod from us is $549.00. In answer to the question about the difference in price between the modified Pontiac and the Chevy is about $150 more for the Pontiac but you don't have to modify the crank to use it. To sum up the explanation the modified Pontiac rod is for stock Buick crank dimensions and stock compression distance on a piston with locks. The Chevy rod is for a modified crank dimension and a custom piston.
I guess with the chevy 6.635" you would just turn the crank to 2.200" and bore .990 pin hole to 1". I guess the advantage here is use the wider chevy bearings. Another one of those cost verses performance things. In my case I'd use the pontiac rod from Mike because I have Ross pistons and my block is decked .050 at .005 in the hole. My pistons may need a haircut. Great info! a)TA rod, fairly big bucks b)Mikes mod' poncho rod, best deal c)chevy 6.635 rod, another good deal especially if we had weisco w/.990 pin
One note of caution: 455 deck height 10.570 (varies) 1/2 stroke -1.950 Stock rod length -6.605 (varies) Compression distance -1.980 Wiseco piston .035 deck height If you use the Pontiac rod at 6.625 the deck reduces to .015 David says his block is cut .050, it would be .035 out of the hole!
Would the modified Pontiac rods use off the shelf bearings for a bbb? Is the major advantage to using the modified Pontiac rods, is the block doesn't need to get decked as much? Allen
The modified Pontiac rod has every dimension the same as a stock 455 Buick rod (except length ) so it uses regular 455 Buick bearings. You do get the benefit of not having to deck the block so much but the main benefit is that it is a 900HP+ rod that is not over 30 years old and it is much easier to balance.
Sounds great. Now all I need to do is find std. size pistons or close to the 4.3125 bore size with the proper floating pin diam.. Ray
Thanks Mike for this info. I am going to assume that the set of SD rods I have with Ross ultra lite pistons at .030 with std deck will reslut in a good combination with a set of Stage 2 Aluminum heads from TA? This is the set up I had hoped to build.
I got a question then? If you use the Pontiac rod Plus the wiseco piston on a stock block you could raise the piston in the block to be .15 in the hole. So this would be a gain in total compression ratio. So you would not have to deck the block .30?
