Hi All, Not sure if I posted in the right place. I was curious to see if anyone has run TA V6 Aluminum heads on a N/A configuration and was wondering what kind of performance they were getting out of it. I have a 1975 231 Odd fire and want to do a high compression build of it. I know some people believe that the 231s or the Odd fires belong in dumpsters but I like the unique sound that comes from them due to the Odd fire setup. Any thoughts?
old odd fire hi-po parts are hard to find even though they used them in jeep hill climbs and all other racing. best to check out some old jeep racing sites for info. nascar busch north use to run the stage 2 v6's. they made tons of them. try and find those engines now. good luck
It should work fine. The odd fire has a stronger crank since the journals are not split. If you run e85 can push up to 11 to 1 , 12 to 1. Compression on the street. Not sure who makes headers anymore, you may want to go roller cam. It will rev pretty high. champion irons are a cost effective choice for heads.
Fortunately I have an old set of mid length headers that was given to me. I’m hoping to get some forged Buick 350 pistons and bump to 10:1 as I feel that’s a safe margin with aluminum heads with pump gas. I was thinking a hydraulic roller cam as well as either 1.6 or 1.65 roller rockers.
I say do it I had an '82 Regal 231 V6 I built up with the Kenne Bell #1 intake (SP 4bbl) mild cam, Holley 390 4 bbl, 3.42 GN rear, and a GN exhaust from the cat back. Stock iron heads, and probably less than stock compression .030 pistons. I WANTED the Kenne Bell 10 to 1 pistons for the V6, but they were outta stock forever Ran ok, probably would have run better with more compression, degreed cam, and better heads.
The uem 1734 pistons would work well and be cheap. Can be got from eBay for 70-80 bucks for 6 . flat tops. Mill block.020 . Roughly 9.8 to 1 . Still low for aluminum heads imo. But cheap and easy. Factory 350 pistons would net about 9.2 So gn stuff will fit, some guys run 10 to 1. On the turbo engines. So you can get some custom light forged pistons if you look. Or contact Scott Brown at buyracingparts.com for custom piston. And cam. I would not be afraid to push the compression up with aluminum heads. A 206/206 or 212/212 roller cam from a turbo v6 would be good also.
You should ask TA if the heads will work on the oddfire block. Stock 79 and up evenfire high port heads water jacket holes are different. You can make them work by comparing head gaskets and drilling and welding on the block.
I’m not sure how much the stock 231 oddfire Rods can take, I now they can take a hell of a lot more than the crummy 225 rods but I’m wondering if I should look into forged rods as well. I think 10:1 would be my comfortable zone on the stock rod. It also depends how high I can push compression while staying on 91 cause I’m out in California. Maybe I can run a resized Chevy 283 rod with the autotec forged 350 pistons?
You will need the 6" or 6.2" length, custom pistons and rod journals turned down to Honda size. https://www.ebay.com/sch/i.html?_fr...l1313&_nkw=nascar+connecting+rods&_sacat=6028
Stock rods with arp bolts should be fine if they are cap screw. At 10 to 1 on the v6 you probably will only make 300 hp unless you hog the heads out and get a big tunnel ram.
That's why I put a 350 in my 76 Skylark. My Harley dyno's out at 101hp and weighs about 850lbs or so and the skylark is over 3500lbs. Had the 231 odd fire in it before.
I like the Harley style sound of my oddfire and I like the idea of working on an oddball motor. I know a Buick 350 would make gobs of torque and power but I already have the oddfire so why not?
''hard to find, but they made a mercruiser aluminum v-6 odd fire 225...very rare, but internals are the same as all the other odd fire buicks'' i didn't know that
