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-   -   Few questions on a 350 sbc build up... (http://www.hotrodders.com/forum/few-questions-350-sbc-build-up-221708.html)

Uniryan2008 07-15-2012 01:45 AM

Few questions on a 350 sbc build up...
 
I have a '73 sbc 350 w/flat tops not sure if it's been bored, I've bought a melling mtc-1 to go in it and I'm going to slap a 300-36 Holley Street Dominator intake that has been polished but not ported on top of it, I only have a 600cfm vs Holley right now with stock E.manifolds. First of all is that cam going to be to much lift for my pistons?? Second will I need to rejet that carb for more fuel?? And third,what kind of numbers should I be pushin after if it all plays out fine???
I will later be putting long tube full lengths on her with a 770cfm street avenger, it's in an '81 gmc long bed. Thank you for any replies.

spinn 07-15-2012 05:05 AM

350 is great for a performance engine build. The power is made from the package. Use parts that are made to work together and are proven.

Melling is the performer cam 420/442 lift , correct. I would use the performer intake. Not the RPm intake unless you have a lot of gear 4.10+ . Stay away from most single plane manifolds on the street.

NA hydraulic cammed, 9 ish to 1 engines I have built are good for .75-.85 power per inch. A sbc making 300hp is a fast engine with a good amount of power.

Lift should clear the pistons. Do not really worry about that till over .450 lift.

Not sure about rejeting , but a 600 holley at baseline should be pretty close. Better than a 770 in a heavy longbed.

Uniryan2008 07-15-2012 09:24 AM

Yes that is the cam I have, and that street dominator is the dual plane z28 style, I knew gears were a givin if I want it to have any jump at a stand still, so that will be a part of this build, it has the stock rear end which I can't find any gearsets for, i was thinking an early 90's reared should be a lot better seems how I can hop it up a bit easier, any suggestions???. What about a throttle spacer should I put it on or leave it off??, one of my wrenchin buddies says some offer brutal low end add, and I was told also they where for tuning not all that?? All I know is you can slap together a bunch of ****** ****,but if ain't tuned right it ain't gonna be worth a ****, I've built a lot of power jus gettin it all dialed in and tuned perfect

vinniekq2 07-15-2012 10:12 AM

estimate
 
My estimate might be fairly accurate for your application.The engine I took out of my 1981 vette was 030 over 350 with a holley street dominator manifold,modified 650 holley DP with 850 baseplate,420 lift 198/208 @ 050 cam,small tube headers.The engine was built by professional builder Jack Muzzomo. Chasis dyno tuned on a dyno jet it put down 205 HP at 4500 rpm and torque peaked just under 280.
with 2.73 gears the car was not spectacular. I now use 3.50 gears and a stroker engine.

Uniryan2008 07-15-2012 10:28 AM

Ok! Thank u both so much for yalls input, it's my first sbc build, jus didn't want a bone stock in my truck, my next build will be a destroked 352.

454C10 07-15-2012 03:56 PM

what is a destroked 352?

Uniryan2008 07-16-2012 10:42 PM

Sbc 400 block stock pistons 6 inch rods and 327 crank, they are screaming beasts that like it high.

vinniekq2 07-16-2012 10:59 PM

352 cubes times 1.2 HP/= 420 horse power?

Uniryan2008 07-16-2012 11:07 PM

I havent built it yet, but that would be nice if that's what I get to start with, where did the 1.2 come from?

vinniekq2 07-16-2012 11:18 PM

1.2
 
thats a good amount of HP per cube.I would like a 4.155 bore x 3.62 stroke for 392 cubes,big bore 350,heads would breathe better and rev like a 350.no need for reduced diametre cam

Uniryan2008 07-16-2012 11:44 PM

Sounds like a nice setup, Im jus tryin to get away from the stereotypical sbc, make it a little interesting next time around, somethin not many see or even hear of, know of any other somewhat simple to build unusual sbc's?

vinniekq2 07-17-2012 12:08 AM

some 350s can be bored 060,so 4.06 bore x 3.875 stroke = small bore 401. American racing engines offers this combo.


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