I have built a vortec headed 383 and I was just wondering if I will be able to get it started and running on the stock chip without any damage to the engine from an over lean condition or anything else. I just want to get it broken in on the stock chip and then I plan to buy the supplies to start burning my own chips. Thanks -John

 

Come on guys I've searched the boards and can't find a clear cut answer to this question. I know optimal performance means new chip but am I gonna hurt anything by just staring it up on this chip?

 

WELL.. I wouldn't start it on the stock chip, my quess is that is it would be WAY to lean, which of course is what you don't want...
other know more about this than me so TTT...

By the way My 388 vortec KICKS ***! (carbed, and "worked" a bit)

 

BumpaD82 ,

Are this the original valve covers?
What kind of heads are they?

It looks super

 

Easy now...

Need more input. What cam? What ECM?

Chances are, it'll be fine. Reprogrammed chips are generally for optimization of the available power, not prevention of sure meltdown.

 

I am building a 383, vortec heads, GM LT4 HOT cam, SDPC intake, stock runners, plenum, tb, edelbrock headers, and stock exhaust. I do not have an AFPR. I was just wondering if I could start and run the car on the stock chip without hurting anything. I want to get it broken in this way and get the bugs worked out then start burning my own chips and making more mods. I am really nervous about this and could really use some help. Thanks guys

 

I have the stock 89 350 TPI ecm

 

I dont see any problem in you running that car. The larger engine will help mask the cam, and that will make the computer more happy. I'm running a slightly larger cam in a 350 that was on the stock chip for a while until I decided that I needed something better in there.

If it trips a code 33, set the TPS lower (like .35v) and it shouldnt be a problem anymore.

 

NO the valve covers are off an 88-up truck repainted, and the heads are GM performance parts Vortec's, upgraded with comp cams brand valvetain 268 XE "kit", and machined for higher lift / springs....

 

John (383 RB), I'm planning a 383 similar to yours, how much $$$ have you put into your engine (parts and machine work)? I need a rough estimate on how much to get started.

wes

 

I imagine it would be fine for break in at least. It is mass air flow so it will compensate at least to the ability of the maf sensor. It might be possible that you would lean out in the upper rpms, but like I said I would think it would be fine for break in.

Ben

 

I ran on the stock chip for along time, like a year, with no problems.

 

Hey, madmax, I just noticed your location. Has it always been anti-tbi school, or is that just because of those people arguing about making power from a tbi?

Ben

 

I've probably got about 3,500 into it right now and all the odds and ends will be calculated because I am hoping to drop it in tomorrow. Good luck with your build up

 

Actually I was called the Anti-Christ of TBI.

But yea, thats when it changed.

 

Well, I think you can get power out of any kind of induction if you have the money/time(forced induction helps also lol) but some are just a more worthwhile starting point than others.

 

If you run tha stock 350 chip it's gonna be waaaay lean, youc an buy a programmer though, they aren't too hard to use : :lala: :rockon: :rockon: :lala: :lala: :lala: :lala:

 

He said he is planning on getting a programmer eventually. It is mass air flow so it will not be lean until he max's out the mass air flow sensor. I seriously doubt that he will max it out at part throttle breaking it in. If he max's it out then programming it wont be as easy either though because he will have to add fuel by rpms I believe instead of by how much air is entering the engine.

Ben