Small Block & Big Block Chevy Specific - big block time?
03-30-2007, 08:50 PM
Hi guys i am new to this web-site and am looking for some advice on my 95 Z-28 , t-56 trany. i have a 383 stroker in the car with ported heads and a custom cam and other stuff but i dont see the need to go in to detail on all of it. My question is this..... i am wanting to go with a all aluminum BBC (454 CID) but have no idea how much mod work is needed under the hood for it to fit ( motor mounts, cut fire wall, custom headers, EXC. ) and is all the work done realy worth the power gains over what can be done with SBC . I would be looking to build one with about 11 to 1 com. strong mid range cam, about 9 Psi super charger ( or what ever PSI would be best ) and a " Mass Flow EFI" fuel setup ( no carp ). The car has a roll cage, unibody supports, moser 12 bolt with locker and 33 spline axels , 4" single pipe exhaust. the suspension is all beefed up too so it should handle the HP , or i will do what ever it needs but i am just realy looking for some info on the converion from SBC to BBC in a 4th gen car so i can think about if its worth it or not. Thanks
03-30-2007, 10:52 PM
Just remember the "little things" that add up when you swap from SBC to BBC. Brackets, adapters, intake, headers, etc etc. You can make a small block run 9s with the right combo of parts with pump gas, it just depends on getting the right person to build it or building it correctly yourself. Big blocks have the potential to build more power without getting as radical, but it costs money and weight!
03-31-2007, 12:34 AM
1st things 1st, if u go to all the trouble why stay small with a 454" u can go up to 582" with a short deck.
2nd, if ur going blower anyway, stay with the block u have, spend the money on strength and pick the PSI u need to run what u want. U need to know what u want to run and what u can afford to run 1st. It's pretty cheap to run a 12 and with very little breakage. It's very expensive to run a 6 and there is a lot of after costs that are needed to keep it running.
03-31-2007, 10:44 PM
thanks for the pearls of wisdom on this. I am not sure what motor i am going with at the moment but have been enternaining the idea for a BBC for some time now ( cose i have many of the parts already ) but after you think about somthing for too long its good to get some other peoples perspective. Thanks for the info!
03-31-2007, 11:34 PM
Whats your budget on this 'all aluminum' big block?
What aluminum block are you going to use?
04-01-2007, 02:10 PM
well i am building a 2000 square foot house right now so my budget is slow ATM. When i am done with the house tho, i will be able to build what ever i want.
As for the block i like the ZL-1 block from GM part#12370850 witch is a 427 Cid and summit sales it for $5070 and Brodix has some nice blocks for a little under 5k but i like the ZL-1 best so far, think it would be cool to have a reproduction block of a block that was in some of the first camaro's in a 4th gen camaro, it has splayed 4 bolt caps, 110 pounds, wet or dry oil sump, and its a GM part. what ever i end up doing it is not going to be a over night project i will spend some getting all my ducks in a row and than go at it.
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