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11-15-2005 08:39 PM #16
Yes I have ARP connecting rod bolts in there.
I have a TH350 tranny in the truck right now, with a ultrabell and moderately high stall convertor. The way I understand it, the stall is based off the engine right? With the stock SBC right now the stall speed is about 2400-2600, so with the BBC the stall speed should go up to around 3000-3200? I'm just guessing, but a buddy of mine that was helping me get started said the tranny and convertor should be fine with the 468, so I haven't worried about it.
What I do think about is getting the right sized heads. Pat mentioned more seating pressure (140#). Why Pat? The springs I listed were what Crane recommends.
Also, can cast heads get me to where I want to go (with some work of course), or do I have to go aluminum aftermarket?
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11-15-2005 08:44 PM #17
Originally posted by trashburner
My computer crashed and I just got it back. I never imagined I would get such a response, especially about a little comment. I love to talk about bbc's, but insight about our wifes vs. our passion in the garage is also interesting. Believe me, the ol' motor projects have been a sore spot with her since we've been together. They just don't get it, do they?
Anyway, thanks for the response, I appreciate it. As a man on a strict budget and engine knowledge in progress, I love talking to people about chevy motors.
So as the 100th person to ask on this forum, any suggestions as far as heads and valvetrain?
What we've got so far:
1990-91 Chevrolet 468 short block. 4 bolt main, Mark IV.
Cam is a Crane Cams Mechanical Commander (older cam, but never used) 272/280 @.050" Duration, .659"/.679" lift.
Valve springs will be Crane Cams 1.460" diameter, 120# seat pressure, 394# @1.175" open load pressure.
TRW pistons .580" domed forged aluminum, dome volume 50cc.
Rods are cast.
Crank is cast, unfortunately, but oil holes are radiied(?) and chamfered, prepped and lightened, as I was told.
Rotating assembly has been balanced.
Carb is a Holley 750 3310-3 with vacuum secondaries, but should be good for now.
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11-15-2005 09:52 PM #18
Originally posted by trashburner
Yes I have ARP connecting rod bolts in there.
I have a TH350 tranny in the truck right now, with a ultrabell and moderately high stall convertor. The way I understand it, the stall is based off the engine right? With the stock SBC right now the stall speed is about 2400-2600, so with the BBC the stall speed should go up to around 3000-3200? I'm just guessing, but a buddy of mine that was helping me get started said the tranny and convertor should be fine with the 468, so I haven't worried about it.
What I do think about is getting the right sized heads. Pat mentioned more seating pressure (140#). Why Pat? The springs I listed were what Crane recommends.
Also, can cast heads get me to where I want to go (with some work of course), or do I have to go aluminum aftermarket?Last edited by pat mccarthy; 11-15-2005 at 10:06 PM.
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Changed the shocks yesterday to OEM spec Monroe, they are still gas shocks. Disappointed that the ride is still very firm, it is not as bad but I was hoping for better. Might have something to do...
Stude M5 build