What all do I need to change in my tweecer with this 418 setup?

bjl95mustang

Founding Member
Jan 18, 2000
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Austin,TX
Ok, I'm running stock wiring a 90mm lmaf and 42lb green injectors. I'm also running a holley 95mm tb w/o the iac. Besides loading the maf tables what else sould i check so I can get this thing running?
 
Brandon

Change your cubic inch scalar to reflect the new motor size. This most likely will not be right on the money but you'll be a whole lot closer with your load values by doing it.

The maf curve needs to built as you pointed out.

Load in your inj values of low/high slope, breakpoint, offsets, and minimum pulse width.

The larger size motor is gonna play havoc with air flow so it most likely won't idle too good without a little tweecing on the following:
throttle body airflow scalar
isc neutral idle air flow function
maf [email protected] volts and below

You most likely will have cold/hot start issues with the 42's so check on the Tweecer site for the old threads that deal with that. Lots of guys run 42's so you can find that stuff with ease.

Those are a few things that come to mind at this time.

btw, whats the deal with a tb that has no isc?

Later
Grady
 
It's a race tb with no iac holes drilled in it. There is space there to add one I just need to go get it drilled out.

Well, this week it's going to get up and running so I will be teching you to death lol.
 
Grady, since I changed my starter so the car will actually start when it's hot, I have noticed that I DO have some hot start issues. But, if I push the gas pedal down just a little, it'll start right up.

The car always starts right up when cold. :nice:
 
bjl95mustang said:
Grady, do you think I should start out with the 95 cobra R tune? Have you ever looked at it?
I have heard good things about that for stroker motors, i would give it a shot. I would also do the ISC as fast as possible because i think that will help your idle quality a TON.
 
WhiteDevil said:
I have heard good things about that for stroker motors, i would give it a shot. I would also do the ISC as fast as possible because i think that will help your idle quality a TON.

Brandon

I'm with John about the ZAO :nice: .

You can load in the stuff needed to get started with it and see how things go.

It also would be simple to do the same thing with the j4j1. :D

Gotta love the flexibility :banana:

Let us know how things go!

Later
Grady