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low buck junk SBC

General engine tech -- Drag Racing to Circle Track

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CGT
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Re: low buck junk SBC

Post by CGT » Mon Nov 25, 2019 10:54 pm

I seem to remember a tbi 4.3 "Z" in S and T series being referred to as "vortec"....but not the lo3 and lo5 "K" and "M" engines.....could be wrong ....4.3 W prior to 96 for sure....vortec name has been thrown around at GM for a long time.
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prairiehotrodder
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Re: low buck junk SBC

Post by prairiehotrodder » Wed Nov 27, 2019 10:18 am

I just realized that my old 78 chevy deck truck has a stock 350 vortec in it that i installed about 6 or 7 years ago and have been running a stock HEI distributor ever since. Never even thought about the cam wanting a mellonized gear on the distributor.
BTW - anyone ever hone out the vortec dist gear to fit on an HEI and save the $96 from GM or $86 from compcams ?

Brian
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turbo camino
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Re: low buck junk SBC

Post by turbo camino » Wed Nov 27, 2019 11:55 am

DON'T PANIC

prairiehotrodder
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Re: low buck junk SBC

Post by prairiehotrodder » Wed Nov 27, 2019 12:27 pm

Thanks, now you know what its like being Canadian !

I ordered the comp cams one for $86, will be here tomorrow from a wholesaler i deal with in Edmonton. My local GM dealership wanted $96 for the GM gear. i could have bought the Comp bronze gear cheaper.
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turbo camino
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Re: low buck junk SBC

Post by turbo camino » Wed Nov 27, 2019 12:37 pm

Weird, Comp 412M is $80 USD, why no 3x markup on that one like the GM gear has?

https://www.summitracing.com/search/par ... =Ascending
DON'T PANIC

prairiehotrodder
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Re: low buck junk SBC

Post by prairiehotrodder » Wed Nov 27, 2019 1:38 pm

turbo camino wrote:
Wed Nov 27, 2019 12:37 pm
Weird, Comp 412M is $80 USD, why no 3x markup on that one like the GM gear has?

https://www.summitracing.com/search/par ... =Ascending
i get wholesale pricing on the comp gear. Its 86 canadian dollars. Wonder if its the exact same gear as the GM ?
The Word of God is quick and powerfull
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prairiehotrodder
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Re: low buck junk SBC

Post by prairiehotrodder » Thu Nov 28, 2019 9:26 pm

Got the junkyard 350 running today ! Runs good with that vortec cam in it. Now i have to wait 6 months to see how it goes. Currently i know that it spins the tires on ice. My $100 turbo 350 even seems to work good. Only new parts in the whole deal are :

oil and filter
Comp 412M dist gear
weiand aluminum water pump
intake gaskets
oil pan gasket
timing cover gasket
ACCEL shorty spark plugs for header clearance.

the motor is out of a 94 chevy pickup
all the roller cam stuff is out of a 98 tahoe
the intake is off an 84 chevy pickup 305
The Word of God is quick and powerfull
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tchapps88
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Re: low buck junk SBC

Post by tchapps88 » Tue Dec 03, 2019 3:37 pm

I'm in the process of building an almost no buck 350 also, got a 1993 truck 350 for $200, gona use the roller setup out of a 1991 camaro 305 engine im scraping, 081 305 tpi heads with home porting and drill press back cut valves, a performer intake i have laying around and looking like the cheapest new cam i like is the melling 22280 which is a step nose cam with 220/224 duration, .495/.503 lift on a 110 lsa for $200 on a cast iron core and has fuel pump lobe.

prairiehotrodder
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Re: low buck junk SBC

Post by prairiehotrodder » Tue Dec 03, 2019 3:59 pm

sounds like my kinda build !! Have you researched the 305 head swap ? I did it once and it was a waste of everything. Maybe you'll have better luck. My experience was that the only thing i gained was compression and it was to much. Detonated like crazy. Put some plain 882 350 heads back on and it worked great.
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tchapps88
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Re: low buck junk SBC

Post by tchapps88 » Tue Dec 03, 2019 5:32 pm

416 or 081 has same chamber size as a L98 / zz4 head, main thing is gotta be a factory dish piston engine, with 58cc chambers and a .020 steel head gasket you should be at 9.8- 9.9:1 compression, shouldnt be an issue for premium if quech is decent. if you wanted to lower it a tad to play safe probably could un shroud the chamber a couple cc and end up making more power.

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