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Old 07-15-2010, 07:07 AM
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86 L05

Hey guys one of my first posts here and have a few questions that my sound stupid. I have bought several books and i have been reading up on the SB 350.

Two days ago I bought a 1986 L05 V8 out of a suburban from texas. It is a TBI but I will be converting it back to Carbration I found it in a junk yard in NY and it only had 74000 original miles so when i paid 180$ for it I think i did well. the problem with this motor is the low HP at 210 its not a burner.

I have been thinking of what I can do to it and I would like your opinions.

1. Get rid of the L05 heads bc they blow and replace them with either vortec heads or if I can find them 202 heads. From what I understand the low hp output of this engine is bc of the heads.

2. Would I be better off with the vortec heads with the edlebrock intake to convert it back edelbrock part #2716 to carb or should I find and run 202 heads due to the larger valves.

Not sure what to do. Also if i run vortec heads what should I be looking to do to the rest of the engine to make it accept the heads and not have any problems.

Thanks guys...any help is awesome

Bret

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Old 07-15-2010, 07:31 AM
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Go Vortec heads. While your at it replace the cam and timing chain as you can bet the timing chain is shot and the factory cam is so small it may as well have round lobes. Use a edelbrock performer plus cam or the summit eqivilent. Add a Q-jet carb, headers, a good tune up and you`ll have a excellant street driver with good mileage. Make sure you use edelbrock intake gaskets.
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Old 07-15-2010, 07:40 AM
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Forgot to mention i building a rat rod
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Old 07-15-2010, 03:42 PM
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Quote:
Originally Posted by RenegadeRedneck
Hey guys one of my first posts here and have a few questions that my sound stupid. I have bought several books and i have been reading up on the SB 350.

Two days ago I bought a 1986 L05 V8 out of a suburban from texas. It is a TBI but I will be converting it back to Carbration I found it in a junk yard in NY and it only had 74000 original miles so when i paid 180$ for it I think i did well. the problem with this motor is the low HP at 210 its not a burner.

I have been thinking of what I can do to it and I would like your opinions.

1. Get rid of the L05 heads bc they blow and replace them with either vortec heads or if I can find them 202 heads. From what I understand the low hp output of this engine is bc of the heads.

2. Would I be better off with the vortec heads with the edlebrock intake to convert it back edelbrock part #2716 to carb or should I find and run 202 heads due to the larger valves.

Not sure what to do. Also if i run vortec heads what should I be looking to do to the rest of the engine to make it accept the heads and not have any problems.

Thanks guys...any help is awesome

Bret
I think you mean 2116 intake- the Performer Vortec. It will accept a spreadbore or squarebore carb. Or the 7116 RPM Vortec, it takes a squarebore only.

The Vortec heads require self aligning rocker arms. If you choose to get a used set of heads, try to get them w/the rocker arms included.

The Vortec heads will only take about 0.450-0.470" lift w/o modification to the guide boss. They also need stiffer springs.

A LOT of info on Vortec heads and mods to them, etc. is HERE.

If your engine has a roller cam, you can reuse the lifters and (maybe) the pushrods, as long as they are in good condition. The pushrod length will need to be measured after the engine is mocked up to get the exact length needed.
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Old 07-15-2010, 06:50 PM
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Quote:
Originally Posted by RenegadeRedneck
Forgot to mention i building a rat rod
i wouldn't have said that......
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Old 07-16-2010, 08:08 AM
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Im 28 I dont have 50 K to spend on making a frame up restore so the way i see it buidling a RR is still getting into the sport unlike most guys my age sitting in front of the tv playing videogames...someday i will build a nice HR when my wife is done with college
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Old 07-16-2010, 08:14 AM
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Just build it safe- a LOT of guys say "If it runs, it's DONE!"
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Old 07-16-2010, 09:28 AM
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I think bigdog was just trying to express that the term is generally not well liked. I'm also young and not made of money, but I wouldn't call my vehicles mean names like "rat rod"

In all seriousness though, Follow the advice given to you by Cobalt and DoubleVision, they're giving you about the best advice you can get.
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Old 07-16-2010, 10:58 AM
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deffinatley. I have a couple old hottrodders taking me under their wing and i pick their brings to learn alot.. one will even help me with the chassis.
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Old 07-16-2010, 11:34 AM
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Quote:
Originally Posted by Valkyrie5.7
I think bigdog was just trying to express that the term is generally not well liked. I'm also young and not made of money, but I wouldn't call my vehicles mean names like "rat rod"
I said that because last time i mentioned building a rat rod it seemed to make some people kinda angry at me. I personally like rat rods, they're pretty cool looking in my opinion.
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