383 with fitech

[91stepside33s]

hey guys new to the forum and new to modifying trucks. I have some experience rebuilding motors stock for stock and doing swaps, but am looking to go further. I currently have a 91 k1500 with 350 tbi and is starting to need some tlc. I am looking to scrap this motor all together and put in a 383 stroker motor, probably a ht383 from gm performance. Just looking for some direction on what would all need to happen with distributor and the computer stuff. I would like to use a fitech efi system, not sure if it can control timing and what i could all keep with the stock ignition system or what could be taken out all together. Any helpful tips would be appreciated, i am fairly new to this and am still learning. Thanks in advance.

 

[shovelbill]

you may want to contact this gent at tbi chips.......check through his website, i found it very informative.

http://tbichips.com/?page_id=103

 

[RichLo]

The simplest would be a fit-tech stand alone efi and a GM HEI distributor.

 

[Dubs]

I have the 600hp fi tech. It's older, about 2yrs I think. You can't control active timing. What you do is set your curve from idle to WOT and tune it for your application. I don't have mine controlling timing yet. I use a standard GM HEI dizzy. The website below is about the best forum I've found for help. There are a lot more youtube vids now too.


http://www.chevelles.com/forums/89-...-tips-info-sharing-ideas-settings-etc-12.html

 

[1997]

have you seen these, seems like a good upgrade replacement, imo.

https://blueprintengines.com/collections/gm-compatible-crate-engines/products/gm383-base-truck

 

[Chewy1576]

have you seen these, seems like a good upgrade replacement, imo.

https://blueprintengines.com/collections/gm-compatible-crate-engines/products/gm383-base-truck

I have that exact engine in my 1990, it has required some additional tuning but it's a beast.

 

[91stepside33s]

awesome thanks for the info guys, i will definitely be looking into a couple of these options. I like that direct 383 swap from blueprint, chewy1576 how much tuning did it need after install?

 

[Chewy1576]

awesome thanks for the info guys, i will definitely be looking into a couple of these options. I like that direct 383 swap from blueprint, chewy1576 how much tuning did it need after install?

I had to correct the fuel maps and some of the O2 PID parameters because there was a pretty good surge at idle (really lean) and under deceleration. I made the spark advance table a little more aggressive also. I have a bored out intake and big block throttle body ready to go also to try to squeeze a little more out of it.


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