Possible to use conventional 400 block and build a 377ci LT1?
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Joined: May 2003
Posts: 6,661
From: LA (lower Alabama)
Re: Possible to use conventional 400 block and build a 377ci LT1?
Originally Posted by Mike Comp T/A #57
I think you went off topic on this.
In theory, the cylinders should be perfectly round. The thicker the wall thickness the better chance that it will stay round and have a good ring seal. This is were you pick up the horsepower. That's why engine builders use torque plates and block filler. The also check several blocks with the ultasonic gauge before they pick one to use. You can machine 2 different blocks exactly the same and one will make more horsepower than the other on the dyno.
In theory, the cylinders should be perfectly round. The thicker the wall thickness the better chance that it will stay round and have a good ring seal. This is were you pick up the horsepower. That's why engine builders use torque plates and block filler. The also check several blocks with the ultasonic gauge before they pick one to use. You can machine 2 different blocks exactly the same and one will make more horsepower than the other on the dyno.
I build engines and am well aware of WHAT bores do and don't do..
IF ya take two different blocks that are identical ya won't see a difference, but if ya did like Mike said switch from a block that was to thin and cracked and went to a Bowtie or dart then ya may see some gains.
Ya got 2500 for the block and 2500 for the machine work to get it ready to go? I don't and below 550/600FWHP the factory block is good enough for most.
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