I have a 91 rs it came with the 305tbi 5 speed, i swapped for a 350 30 over 4 bolt main, still has cast iron heads, but a comp cam, hyperputic pistons etc..

hooker comp headers
no cat

anyway i still have the factory tbi set up with the stock computer, i had to street time the motor to get it to drive nice, but i know its far from its potential, i was gonna get a chip from summit designed but i figured there would be cheaper ways around it,

any advice on injecters
or chip

thanks

 

I believe you will need a knock sensor for a 350 CID. I would use a cop car sensor.

Also I think you need a ESC module from a 350.

Higher fuel pressure and to accomodate that you will most likely benefit from a TPI fuel pump. Add a FP gauge.

You will need a corrected "chip" aka corrected .bin with changes in tune. You could try a cop car chip but it wont be the best idea-tune.

Check out stickies DIY-PROM on this site.

 

I would like to get a tune port set up, but i just had a kid and money is tight, i was just trying to get the computer up to speed with the motor, i know i could always get a comp from a 350 gm around the same year but i figure if i am gonna spend some money it should be twords the direction of aftermarket computer systems

btw the car runs and drives great right now, i can just feel it really leans out when you get on it, and runs rich at idle, has new 02's and knock sensors, just wanted to know what other people have done, i would imagine alot of you have done this kind of swap to loose the 305

 

check out dynamicefi.com

and the megasquirt site

 

Anyone here use the dinamicefi set up? sounds like the right choice for the money, Any suggestion on injectors other than get a set for a 350 tbi?

 

alot of guys on here use ebl its awesome and as far as injectors go, yea go with a set of 65lb ones, if you can find a pair of 68lb cop car ones..go with them.

 

thanks just trying to get the most for the money, the cars going to my cousins shop to finally get painted next week im pretty pumped

 

what is a cop car sensor?

 

think he meant a knock sensor from the cop cars with the 350's

 

what i did was buy the moates g2 adapter and had it sodered to the stock ecm so i could run a flash chip on it and then tuned it using tuner pro, quite a bit cheaper then going ebl and has worked great for me even with the new engine combo

 

Where can i get that system? does it work off the lap top like ebl

if had a hell of a time finding the 65lb injectors found a set for 200 but they just say caprice ltz so im not positive if their 65lb cause there were a few choices in thoose

 

http://www.moates.net/product_info.p...products_id=36

that is the adapter, then you run a zif socket on top so the flash chips can be removed easily. This method requires you to pull the chip and stick it on a burner, burn the tune then retest. Alittle more of a hassle but works none the less

If your not too cocerned with having GM injectors, go to advance auto..you can pick up Borg warner injectors for about 70$ a piece brand new

 

gmpartsdirect.com can provide you with part #'s.

I posted this one B4 but it may not be 100% accurate.

http://z28boy.cz28.com/main.htm

 

Figure out your engine requirements by using this formula ; Fuel requirement in lbs./hr = (Max HP x BSFC) / (number of injectors x duty cycle) BSFC in tbis are typically .5 . Then follow this link
http://users.erols.com/srweiss/calcpchg.htm
and play with the fuel pressure until you get the injector size that you want .