Standard blocks are very weak. I have never seen a T-block but the standard block has 7/16" main bolts instead of 1/2" on 1-4 and 1/2" instead of 9/16" on the rear. I had one that seized up and broke the crank in 3 pieces and ripped the 3 center main webbing's out of the block. The main webbing was very thin. I would be afraid to use a standard block for any of this. It was a 79 301 in a Grand Prix.
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Stock cranks were subcontracted to Lenox.:rolleyes::D
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Tom very cool. Post this on 301garage forum. I know they will love to see this.
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Better to build the engine and show them that it takes 326-400 parts to make a better 301. Geno |
LOL,actually posted there days ago but no pics.There is someone on there already that is doing a 4in stroke CV1 race type engine,looks hi dollar,diff from my on the cheap(sort of) street build.Tom
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Although the more I learn about the 301T block, the less I like it (the block, as the foundation for this build). I've read rumblings of a possible short deck block from the AllPontiac folks (or was I dreaming again???:)) I hope the 383 holds up, and meets your expectations!!! You must have picqued Dave Bisshop's curiosity a lot, to get him to build that intake. As busy as we all know he is, it's a great looking piece. The single plane setup makes the most sense, from ease of fabrication point, a dual plane would have been a lot more difficult w/ the sharp turns and getting everything lined up, at the head..... Keep on keeping on.... |
As far as I know there is NO short deck block on the drawing board.There is and has been "shorter" deck blocks on the market.It would take a change in the oil filter pad to make a true short deck block.Tom
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Wow what a neet piece. Can't wait to see the turn out on this build.
I'd like to see a big cam and make it a high winder but thats another story. This is a very interesting build though and can't wait to see the results. It's going to be a neat piece. GT. |
Crank went to the machine shop for turning today.Shim is being built.Joe and I have decided to run the 3122-3115 cam with 1.65s on the intake and 1.50 on the exhaust.The 3122 I is a 380 lobe and the 3115 E is a 400 lobe.Still not sure about lifters,Comp told me the pontiac hyd roller lifter should be good(SHOULD?)Tom
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Tom
How goes the 301??? |
Crank is done,have bearings,waiting for my friggin machinest to make the bearing shim.He is holding up the whole deal.Called Rick Johnson this morning to see if he could knock a couple out for me.If there are any machinest reading this,I need a shim 3 1/4 ID and 3 3/4 OD and 69thou thick.Need a couple ASAP.Tom
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What do you need the shim for?
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the thurst bearing web is 69 thou narrower on a 301 block than a 400 bearing.Much like a 428 block compared to a 400.Tom
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This may be easier to have laser cut out of 14 gauge cold rolled then lightly sanded down. What holds it in place?
http://www.sheetmetalguy.com/sheet_m...auge_chart.htm |
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:Ithink: |
Nope, the "HD 301" blocks were leftover 303's that had been stacked in the shop, someplace.
I do wonder this: would hard-blocking a 301T block help with some of the strength issues? Anxious to see how this one turns out. Have always regretted that Pontiac killed the traditional V-8 for the SBC in the Third Gen Firebird. The lighter V8 with the turbo woulda been a killer in that one. Likewise, always wondered what a true 303 Turbo in the last of the Second Gen Firebirds would have been able to muster... with real Pontiac heads, a good crank and decent rods. |
I'm waiting with great interest as well- small-bore Ponchos have always been ignored as a real performance engine, and a 301/383 stroker would definitely bring the 301 into the fold as real Pontiac high-performance V-8. I don't think a turbo would really be necessary unless you're trying to get power like a built N/A 455 (500-600 hp)- and at that level the stock 301T block would no doubt be the weak point. I think the point of the build is to make as much N/A power as possible with as many off-the-shelf 326-455 parts as possible and still retain use of the 301T stock block.
Even a 301/383 with traditional ported iron heads and a HFT cam should be able to pull down 400-425 hp with some revs. The 3.75" stroke crank should give it more than enough torque to impress most Pontiac guys. Geno |
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