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Old 05-31-2014, 07:56 PM   #2
BR3W CITY
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Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: i have some questions about my swap

Quote:
Originally Posted by 1970 C10 MJW View Post
I have a few questions...
2) How do I tune this function in? (i am not a tuner i just want to know so i can discuss it with my tuner hes never tuned a gm car, but he is an experienced tuner we will use hp tuners)

there is a Fan1 and Fan2, he shouldn't have an problem locating them. I will say tho, I would be very cautious about having someone tune your car who hasn't dealt with the way GM handles tq management and similar. I had a very good local tuner do mine, and after sitting down with a an o.e.m tuning engineer, we found issues all over. You can make a car run decent on a crap tune and never be the wiser until it blows up.

3) on lt1swap.com it says we can use a pin for a tow haul mode

Hart Rod and some others had a thread on this a little while back. If you dig back through the Lsx section they have a few pages on setting it up. The GenIII and GenIV handle it a little differently.

5) the tach output pin, I have an older sun 8k tach, what do i need to do with the one pin that i have on the ecm?
I may have more questions... but im not by the truck so i dont remember anything else atm. thanks for any input
There is a thread called Conventional Tach on LS2 that gives the part # for a pullup resistor allowing the use of regular tach's
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