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Old 08-01-2010, 07:39 PM
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any cam guru's out there please help with my sbc build

can some one please help me figure out the best combo for my build. i have an 86-88 4bolt main 350 bored .060 over. i have bowl blended,portmatched and polished vortec heads with performance valves, worldproducts crosswinds intake, carb can be what ever needed. i'm using electric water pump, 3:73 posi rear and 700r4 trans. i know you need to know what pistons ... i dont know they come with the short block. the guy told me they were flat top but they have a dish in them with 4 D shaped groves in them. do i need to take a depth mic to these to find out how deep the dish is? i'v listed the parts being used for this build and my goals are as much hp as i can get without blowing those vortecs off the block roller or solid or hydrolic.... i dont know. i have not bought the cam, lifters, or rockers yet. please someone help me out even part #'s if possible. i think i'v listed everything other then the pistons.

thank you
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Old 08-01-2010, 07:56 PM
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I would not begin an engine build with those pistons. There is no way to get a good squish with that narrow little band around the crown and the remainder of the crown sunk down in like that. In other words, there is not enough flat surface area on the crown to come up against the underside of the cylinder head to generate squish. I keep this photo in my gallery just to show what not to use.....

The link shows a piston with a generous flat area on the crown in the right of the photo. Compare the two and perhaps you will see how one will work well and one won't work so well.
http://www.kb-silvolite.com/test/kb_...tails&P_id=156

Why an electric water pump? Is this a drag-only motor? Does the block have provisions for a roller cam?
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Old 08-01-2010, 08:03 PM
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really, well i'v read a lot of your posts and i'll trust what you say new pistons i can buy can anyone still chime in on a good cam and maybe a good matching set of pistons to go with it lol please anybody i'm ready to get this motor into my camaro and hopefully drive it before summer is over.
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Old 08-01-2010, 08:18 PM
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What will the motor be used for? Pump gas? And again, why the electric water pump? Also, why the +0.060" overbore? Aren't there any standard 350 blocks in Michigan? Will it stay a 350 or enlarge itself out to a 383? And again, does the block have provisions for a roller cam.
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Old 08-02-2010, 05:53 AM
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i dont think there is any standard block in mich. we are trying to be the next tennissee where everything is rigged .. i plan on using duct tape to hold my heads down lol

the block came the way it is. i traded for it off craigslist. i dont plan on doing a 383, i plan on pump gas, why electric water pump... cuz i had one laying around.

i'm not a gear head but nothing wrong with trying to have a little fun. you smart guys can be the only ones with fast cars i have a some extra sbc parts and the 305 in my camaro was getting....... well it's a 305 lol so thought i'd try and build a nice motor. i dont know if the block is set up for rollor or not. the block #'s came back as 86-88 motor. i have not bought anything for the valve train yet.

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Old 08-02-2010, 08:57 PM
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Is the top of the tappet bores machined flat? Are there 3 bolt holes in the middle of the lifter valley to use for bolting in a sheet metal tray to hold the dog bones? If the bores are not machined and there are no 3 holes in the center of the lifter valley, then it is not a roller cam block.
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Old 08-03-2010, 05:08 AM
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i'll have to check that when i get home tonight.

thanks
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Old 08-03-2010, 07:49 AM
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Look at the 2nd Pic in this Post by Doober and you can see the areas Tech is asking about>> http://www.maliburacing.com/forum/vi...747732#p747732
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Old 08-03-2010, 07:54 AM
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ya i'll look tonight when i get home. i know i ran the block #'s and it said it was a 1986-1988 block. im going to buy some better pistons like he suggested, should i go with better then stock rods as well? i would love to see this motor over 400hp.
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Old 08-03-2010, 04:02 PM
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What about the rest of the car ? Gear ratio, exhaust, tourque converter etc.
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Old 08-03-2010, 04:11 PM
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mentioned all that in the first post. if i need to change things i can do that my budget is'nt spent yet so i have some room for play.

thanks
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