305 to 350 prom (i am a newbie help please) - Third Generation F-Body Message Boards

MTPFI-MAF · 12-28-2003, 05:40 PM

Ok I have read (intro to prom burning) I have a 1985 camaro with a 305 TPI w/MAF The car originaly had a 700r4 But Now Has A T-5 and still has the stock chip Is there any thing to change in the chip that will make a difference since there is a t-5 Now.
Also I purchased a GM goodwrench 230hp 350Long Block. I will be swapping the tpi On to this engine in about 3 months. What equipment do I need to burn chips (i don't want to data log anything yet.) also What chips do I need for a 1985, I think that in 85' the prom just pulls out. And how do I get the right .Bin file and Ecm File for a starting point for a 350 tpi w/t-5

Thanks.

ps I know that i should swap harrness to a 86'-89' because the ecms and ALDL connection and ecm are faster but just want to get it right for now. Ecm and harrness swap will be late next year.

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3.8TransAM · 12-28-2003, 05:53 PM

Tunercat i belielve has the software for your 85 tpi...

Everyting else u ask of is in all the stickies at the top of the page. Pay special attention to Trax's guide/intor to prom burning...lots of great info for newbies....

Read thru that and other stickies and do some searches for what u are looking for, than if u have more questions feel free to post :-)_
Later
Jeremy

Morley · 12-28-2003, 09:05 PM

Quote:

Originally posted by MTPFI-MAF

ps I know that i should swap harrness to a 86'-89' because the ecms and ALDL connection and ecm are faster but just want to get it right for now. Ecm and harrness swap will be late next year.

Well, you don't need to swap the harness, justthe ECM. The harness you do a little repinning and like 5 splices to work with the 165 ECM.
Tuning the 870 prom to work right with the 350 would be a waste of time if you plan on doing the 165 swap a little later because you'll be doing a re-tune of the prom in the 165 also.

You could just get the prom for the 85 Corvette and a set of 24# injectors to get you by with the 350 until you get the 165 swap done.

MTPFI-MAF · 12-29-2003, 07:09 AM

where can I get a prom from a 1985 corvette, Besides the junk yard , can I buy one new from a part store.

Morley · 12-29-2003, 11:01 AM

Quote:

Originally posted by MTPFI-MAF
where can I get a prom from a 1985 corvette, Besides the junk yard , can I buy one new from a part store.

From GM

z 28 jari · 12-30-2003, 02:00 AM

Is it so that -85 vette uses 35 psi fuel pressure with 24 lbs injectors,and is that -85 (870)350 chip direct swap?

Morley · 12-30-2003, 04:10 AM

Quote:

Originally posted by z 28 jari
Is it so that -85 vette uses 35 psi fuel pressure with 24 lbs injectors,and is that -85 (870)350 chip direct swap?

Yes, the 85 Vette used 38 PSI with 24# injectors. The chip should be a direct swap, the Vette, T/A & Camaro's all used the 870 ECM in 85 (TPI apps that is)

z 28 jari · 12-30-2003, 04:41 AM

Morley,
do you know how "forgiven"is that -85 vette chip at modified engine?(cam ,exhaust,better heads)

Morley · 12-30-2003, 06:48 PM

Quote:

Originally posted by z 28 jari
Morley,
do you know how "forgiven"is that -85 vette chip at modified engine?(cam ,exhaust,better heads)

Being a MAF system it will be somewhat forgiving, more so than a MAP system will be. The cam would really be the kicker, depends on how much more duration and lift over the stock one you'd be going.