supercharger timing

[Foxbodyguy49]

looking to free up some more low end torque out of my tune. I don't have access to a dyno to do it and was wondering if anyone could suggest some changes to my timing map and my accel enrichment. attached is my tune and a datalog with a pull on the parkway.

 

[a91what]

Well you are a bit lean, the AFR does not match the AFR target under load.. If you are running 93 octane and aluminum heads [ I think you are if memory serves] you can easily increase the timing at WOT 100kpa up to 33-34* from 30*

 

[Foxbodyguy49]

Thanks Steve! And yeah I’m still trying to get WoT fueling dialed in I don’t get much chance to really let it rip on the streets only cruise and light throttle any pointers on best way to go about that? Just do 4th gear pulls?

 

[Foxbodyguy49]

And yes I’m running 93 and AFR165 alumium heads with 1.6 RRs

 

[a91what]

nah, 2nd or 3rd gear pulls will do to get you within 2%... give me a minute and ill trim it for you and bump your ign table..

 

[a91what]

here ya go

 

[Foxbodyguy49]

You the man thanks! Overall the car is great I’m super happy with the microsquirt so far beats the hell outta my old chip that’s for sure lol

 

[Foxbodyguy49]

looking alot better now thanks. but question what do you think about my duty cycle? im only running 30lb injectors right now and my duty cycle hit 97 on this last datalog so im thinking new injectors are in the near future what size do you suggest?

 

[Blown88GT]

LU-47's
You might need connector adapters which Ford no longer makes.

LMR still has the kit.

Ford Performance Mustang Fuel Injectors - EV6 - Uscar w/ Jetronic Adapters - 47lb (86-04)

Upgrade your 1986-2004 Mustang's fuel system with this Ford Performance 47lb fuel injector kit!

lmr.com

 

[Foxbodyguy49]

Thanks so when changing injectors with MIcrosquirt will I have to re-tune the whole fuel map or will changing required fuel info make the switch that easy

 

[Blown88GT]

Ideally, just the required fuel, but it didn't work for me. It developed a low load stumble. Was probably there all the time but wasn't noticeable until the injector change. Steve figured it out.

I upgraded because I, too, was maxing out the duty cycle. Mine's a bit different because I use the MAF for fuel & MAP for spark.

 

[Foxbodyguy49]

Gotcha okey thanks I appreciate it will prob up the injectors over the winter hopefully with a few other things

 

[a91what]

Either lu47 or deka-60 will do nicely.. I think the deka-60 would be the better choice as they dont require the adapters.