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#1 |
Registered User
Join Date: Jan 2003
Location: Nashville, Tn
Posts: 38
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383 question?
When I bought my 78 suburban it had a tired ol 350 it was definatly needing a rebuild well for the last few weeks i have been pulling the front clip off (rusted fenders), and been trying to figure out what im going to do with the engine. I know im defiantly going to rebuild it but the last week i have been contemplating on building a 383. now here is the questions what comp. ratio whould i hunt for to make it run on 87 octane gas and using the stock cast iron heads 76cc (gas prices are kinda going up). I wont be doing to much hot rodding to this suburban just a drive around vehicle and maybe a few time hualing stuff. i like the power of the 383 because i live in tn ad we have alot of hills here. This kit i saw on ebay http://cgi.ebay.com/ebaymotors/ws/eB...tem=2402460187 looks like a pretty promising kit and i email the guy and said he could get me on with 8.7-1 comp raito with 76 cc heads will that run on 87 octane. sorry about the dumb question i can build the engines dead on i have had plenty of expreience build engine and transmission for other people just never really had a chance to build one for myself. and help is apprciated.
thanks, Ben |
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#2 |
Senior Member
Join Date: Jan 2003
Location: Atlantic City, NJ
Posts: 1,073
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Make sure the 400 crank has 350 journals and don't forget to ask about the pistons .030, .040 ect. I would reccomend flat tops for 76cc heads. Check all the performance web sites cause everyone offers a 383 rotating assembly.
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86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction ![]() |
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#3 |
driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,720
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Its a standerd 383 kit. I wouldnt buy it just because of the keith black pistons. Too many people I know have bad exsperiences with them. Just find Tracy Fotch on this board, he'll tell ya.
A 9:1 compression is fine for 87 octane. Try not to go below 9:1. Add a edelbrock EPS intake, comp 260H cam [216@.050] 600-750cfm carb, HEI with MSD internals, and 1 5/8" into 2.5" full length headers. I had this almost exact same combo on my 383 way back, and it was a awsome daily driver, torque motor. Then I added some vortec heads [which bumped compression up to 10:1] and I was about as pleased as can be ![]()
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-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
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