Does anyone have experience with a 383 using 6' rods? I'm mostly concerned about the oil ring groove being up in the pin boss and possible oil control issues.
While I understand from a drag racing point of view, it doesn't matter much however this particular build will also see a lot of street and highway miles.
I don't want to build an oil burner.
Any experience you can relate would be appreciated.

 

Have you seen the pistons a stock LS7 uses? I think you'll be fine as long as you go with a good quality, name brand piston.

 

im running 6 inch rods with je pistons in my 383, not a single problem,just buy good ones and u will be fine

 

Very interesting. LS7 on the left. 383 w/6" rod on the right

 

Do you have a part number?
May I ask what size heads?

 

I ran the SRP's in my 383 with 6" rod. i have 6" rods in my turbo 401 motor with JE pistons.

383 I beat on alot with alot of track time, mostly street time and some nitrous abuse. Never ate oil, never had a problem. That was a 6800 rpm shift point car Has hit 7000 a few times.

401 is still fresh and doesnt get street driven alot, atleast not yet since its only been on the road for 6 months and I'm no longer living near the car to play with it. No problems so far as none are expected but its early to tell. The turbos leak some oil and so do the drain lines so i'm losing oil between changes but its not from the oil ring location, its more of a boost/blowby problem.

The 383 was fine tho. You just run the rings with the oil rail ring supports then the oil ring. It should be fine with that. The JE's i have did have the oil ring inthe wrist pin area but the oil rail support ring makes it possible to do so.

 

I run 6 inch rods in the 350, still has the same cut out for the wrist pin. It's been together for 6 1/2 years with quite a few street miles on and it hasn't lived an easy life. I shift at 7000 rpm and has bounced off the limiter a few times at 7500 screwing around. Doesn't burn oil and doesn't have a hint of blue smoke while driving. The one time I did take the heads off to up the compression, everything looked perfect inside.

 

have to dig up part# at work, but i am running vortec heads, 64cc i belieave.... o92 casting number, came from 98 350......lower block is 69-79 350, 3970010 casting number for my block, lm completly happy with my setup, nothing wrong with 6 inch rods,

 

Thanks for all that everyone.
The plan is starting to come together.
What I'd like to do is build this 383 with the vortecs ans keep static compression at or below 10:1. That can be accomplished with a 7cc piston, stock deck height (.025") and a hefty head gasket of .051". I know my quench will be less than desirable at .076". This setup will yield a 9.98:1 scr. A .040" gasket bumps it up to 10.23:1 which still may be managable on 94 octane.
Once the aluminum heads are installed (64cc), I can go for the engine specs I'm really after and that's a static compression of around 11:.1. A .015" gasket will get me there (10.86:1 actually) and the quench will be near optimal at .040".
So far this is the best way for me to sort of have my cake and eat it too.

 

[QUOTE=Orr89RocZ;4526646]I ran the SRP's in my 383 with 6" rod.
383 I beat on alot with alot of track time, QUOTE]

What was your 383's best NA pass?


Same block as mine. Vortecs too.

To all of you: What ring packs are/were you using? 1/16th, 5/64ths? I assume moly faced.

 

Best pass was 11.47 at 118 with best trap of 119.1. This was in summer heat with less than optimal 3.42 gear. Car had 11.2's in it but I started spraying it and never ran n/a again.

 

Hmmm. Do I see 11's in my future?
Currently 12.7@105 in a 3700lb car.
The new car will be 200 or 300 lbs lighter. A refined 383 build (with much better exhaust than the 350 ever had) that should produce at least another 40 horsepower (just based on horsepower/cube of my last build).
It'll be close.

 

What heads were you running and im guessing auto with 3500 stall?

 

Box stock AFR 195 eliminators with 8019 springs shimmed for 165lb seat pressure. That motor was a blast but needed abit more head and abit more cam to be really nasty.