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Old 07-08-2004, 02:20 PM
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350 Build Up Please Look Over

Hey

Im curently building a 350 for my S-15 i was wondering if anyone could take a look over it.

350
4btl main
bored .60 over
10:1 flat tops
Vortecs Heads 2.02/1.60
650 CFM Edellbrock Carb
Vortec Intake
Hugger Headers
Comp Cams XE274H @0.050, 230/236 ,0.487/0.490
Solid Lifters
Th350 (Stock Converter)
Rear End i have a 9" that it 3.10 and a 8" that i have yet to figure out the ratio

This truck is a daily driver but, i have a heavy foot
I hope this is all the info needed , thanks alot

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  #2 (permalink)  
Old 07-08-2004, 03:14 PM
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SBC-S-15 welcome to the board.

You may want to change your Cam to the XE268 it will work much better with a stock tranny and stock stall converter, if you insist on going with the XE274 you will need a trans cooler and around a 2200 stall converter.
The rest of your motor looks good to me, but I sure the experts here will chime in and let you know if they see a problem.

406chevelle
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Old 07-08-2004, 03:43 PM
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Hey

Yes i had considered Comp Cams XE268H still in debate over getting new converter or not if money permits, i forgot to mention the TH350 will have a shift kit as well


Thanks Alot
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Old 07-08-2004, 04:44 PM
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I run the 274 in my 400 and love it. If I was doing it again I would go with the 284 but for a smaller CI 350 the 274 will be perfect. Buy the stall !!!! I run a holeshot 2400 and it works fine. Use the 9" if you can parts are cheap and it will hold up better if you like to melt the tires. Sounds like you have a good combo and have done your homework. Good luck with your build-up.
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Old 07-08-2004, 05:40 PM
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DO NOT USE SOLID LIFTERS ON A HYDRAULIC CAMSHAFT

The opening ramp on the hydraulic lobe is way too steep and theres no cushion to absorb the shock. If it ran long enough to get it on the road, it would likely do some very funky things to the valvetrain.

Other than that the combo looks good.

Larry
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Old 07-08-2004, 05:41 PM
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What do you mean by vortec intake?

Good catch coldknock, I didn't even see that.
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Old 07-08-2004, 06:12 PM
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Unless the vortec heads have been modified; the cam you have selected has too much lift for stock vortec heads.

You will need a higher than stock stall speed converter.

Need more rear gear. Go with around 3.55-1 with the 9" or 3.50-1 with the 8".

You will also need some sort of traction bar setup.

As already stated; you can not use solid lifters with either of the cams mentioned.

You will probably not be able to run pump gas with that compression and cast iron heads.

Use a trans cooler as well.

Good luck and post some photos.
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Old 07-08-2004, 07:40 PM
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First, I have and my friend has vortec heads, that cam is too much for stock vortec springs, I would suggest changing out the springs if you run that cam. I ran a 262 and i had a stuck spring as soon as i started up my car. Either because of too much lift or just a bad spring you decide. About compression, 10:1 you can run on 93. My friend has a vortec-headed 10:1 motor, 268 cam motor and he runs on 87 no detonation or pinging(i still don't know how, don't ask, but its true).
Heres my motor
350, 4bolt main
Cast reground crank, Northern auto reconditioned rods/arp bolts
Hypereutectic 9.35:1 flat-tops, Vortec heads w/ comp roller-tips, XE262,performer RPM airgap, 6210-650double pumper,dynomax headers. TH350 w/ 2300-2500hughes stall with stock 2.41 gears. It was quick thats all i gotta say.The main concern would be springs, gotta get better springs if you run a bigger cam, BTW vortecs don't flow worth crap after .500lift.

-Eric
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Old 07-09-2004, 04:43 AM
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Hey i would like to say thanks for all the input already, i appreciate it

this is just my plan so far i have the majority of the parts but still fine tuning if you will with the rest, i will probably go with the higher stall converter, i will buy the appropriate springs once i have decided on the right cam, the only problem now is, probably an dumb one but the solid lifters and a hydraulic cam, what should i use instead??

thanks allot
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Old 07-09-2004, 07:22 AM
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hydraulic lifters

Your best bet is to buy a cam kit, that way lifters are included.
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Old 07-11-2004, 03:42 AM
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Hey

Yeah i have checked into cam kits that is probably the way im going to go, but if i did use solid lifters anyone have a suggestion on a suitable cam?


thanks
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Old 07-11-2004, 03:51 AM
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I would go to either a smaller cam, or high stall converter.
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Old 07-11-2004, 03:58 AM
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Hey

Well i do belvie i will fork out the money for a higher stall converter, any suggestions on a cam for this engine if i did use solid lifters??

thanks allot
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Old 07-11-2004, 06:52 AM
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dude wtf? WHY DO YOU WANT SOLID LIFTERS???????? trust me you want a hydrollic cam unless you plan on drag racing this beast only!
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Old 07-11-2004, 07:52 AM
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Thats true, you'd flatten those lobes in no time driving it as an everyday car. You really need to go with hydraulic. Especially with todays oils.
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