hey hows it going? one of my buddys is building a low compression full roller 383 and he wants to use a car to brake it in, which will most likely be mine. i have a lo3 right now runnin on a hypertech thermomaster chip.... with its calibration, could i run his engine without any tuning? im not trying to tune a chip for power out of this engine, just to break it in. will it run okay with this chip? i might end up buying the engine after break in, then tune the chip, get a better tbi, so on.....ect. i just want to know if it will run okay with this tuning for at least 3000 miles.

 

If I were you, I would want to break it in with a carb on top of it. You'll ruin that motor trying to break it in with a stock TBI and that sh*tty chip. You'll choke it on air and it won't get nearly enough fuel; I think it would just be bad news without chip burning.

I say break it in with a carb. Learn to tune chips, throw a Holley 670 TBI back on it after break-in and tune it up right.

 

All I did was TPI heads, an L98 cam and headers and I having some pretty major tuning issues. I can't imagine what the tuning would be like with a 383 and a big fat cam!!!!

 

I second breaking it in with a non-cc carb setup. Not too sure it's worth going through the PROM burning and tuning process, unless, of course, he funds it in which case, it's up to him.

 

did you say break it or break it in?

 

if you're not going to keep the engine in the car, you'd be nuts to go through all the work necessary to tune it.

 

so <sean> are you suggesting if i keep it in, i go with a carb setup and rip out all electronics?

 

this represents a dilema. not many of us were able to break in a brand new motor in a car that does not have a prior good tune. i would expect the tune would need to be close. not too lean not too rich. each i assume would hurt the break in. here is where an experienced tuner could be of help. some of us (ben73) run a 383 TBI. that person could help you with the basic tune but still i would think a hands on tuner would be better. tuning is trial and error. no room for error in a break in. IMO. seems a WB would be a BIG help. i think the carb idea needs some consideration however that in itself complicates things but would most likely result in a better break in process. carb tuners can get it right quickly. IMO.