re-tune with 3500 stall?

**nathanWS6** · 07-29-2012, 04:43 AM

i'm having a 3500 stall put in this week and was wondering if i need to send my computer back to frost to tune for it?
will it be ok without for awhile? only asking cause in amonth i'm having 3.73 gear installed..

**chevuman260** · 07-29-2012, 05:48 AM

I went with a 3200 and drove around for 500 miles before getting it tuned. Car did fine but i never beat on it in that 500 mile period.

**nathanWS6** · 07-29-2012, 04:30 PM

ok, i can get a deal on a new FTI billet 3800 stall converter 9.5 with an STR 2.5
is that too high for my car or just right?

**0rion** · 07-29-2012, 05:04 PM

I would wait until you have the gears in there but you will most likely need a tune with that stall. Your shift points will need to be adjusted.

**Firebirdjones** · 07-29-2012, 06:18 PM

You may also find a tune needed to desensitize the engine misfire tables when that converter is installed.

I found with my 3400 the computer thought the trans was slipping and would set off the engine misfire codes, then put the engine in limp mode thinking there was a problem.

I had to go back in the tune and lower the misfire tables a little at a time until it quite setting the code. Same thing happens when camshafts are installed. Some guys find they have to eliminate the misfire tables completely.