TunerPro Question
Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
TunerPro Question
Can somebody tell me were the injector constant is & how to get to it please? It seems like I've looked everywhere but I can't find it........I've searched every term I can think of on the help function & I know it's gonna end up to be a simple answer 
Thanx
Thanx
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Great, thanks! I thought it might be something simple
Don't confuse my being a noob with not looking hard enough, as I said I looked everywhere. Here, 3rd Gen, TP Help, and other tuning sites. Most people refer to the term "injector constant" as being a preliminary step in setting a tune's parameters & that's just not on TP's Help page. Nor are the terms Injector, Flow, Constant (as it relates to injector), BPW, etc. Heck, the very phrase "single fire FI" isn't even in the Help Section
Terminology that's second nature to experienced people might as well be a foreign language to a noob like me. I'll eventually get thru it though. 
Thanks again!
Don't confuse my being a noob with not looking hard enough, as I said I looked everywhere. Here, 3rd Gen, TP Help, and other tuning sites. Most people refer to the term "injector constant" as being a preliminary step in setting a tune's parameters & that's just not on TP's Help page. Nor are the terms Injector, Flow, Constant (as it relates to injector), BPW, etc. Heck, the very phrase "single fire FI" isn't even in the Help Section
Terminology that's second nature to experienced people might as well be a foreign language to a noob like me. I'll eventually get thru it though. Thanks again!
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Steep learning curve getting your head around the terminology .As with the above case what you and I would call one thing ,the writers of the program have called something completely different
And with TunerPro , there is no instruction manual .It is feel as you go with help from the tuning forums
Former Vendor
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
I had the same problem when I started. Be sure to change both the single and double. If your car is still too rich or lean, you can go up or down a pound or two to get things closer. My 30* injectors work better with constants set at 31*.
Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
I'm running 30# lb injectors too, what F/P are you using? I'm at 46#, so I'm going to have to do the math if I want to change my current constant.
Former Vendor
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
I think I have mine set at 45*. I have a wideband O2 and it was showing a little rich at some rpm and richer at others. So I changed the constants to 31* thinking that would be easier than going through a table and now the numbers look much better.
Race Director
Joined: Jun 2004
Posts: 13,949
Likes: 705
From: WI
Glad you got that answered. I started using TurnerPro as well. What are people doing with the PE vs RPM table? I was thinking of leaving the enrichment % there set to zero and add where needed, is that a good plan?
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Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
I can't find my **** with both hands right now
On a serious note, it's stuff like this: fundamental strategy, terminology, and T/P familiarity that causes us noobs fits. I got half a mind to do a thread for the archives solving these very questions from a noob's point of view if I can ever wrap my own head around it.
........one of these days.................
Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
My constant is currently set at 27# (don't ask me why, this is exactly why I need to learn tuning.......)
and I'm showing BLMs at intermittently rich. 114 on the low side up to an occasional 138 across the lean side; with a good amount of my part throttle close enough to 128. I'm wondering if being a noob it might be best to leave the constant as it is for now because I'll have much less to deal with on my first go-round. Then, make the constant change after I've had some experience 
What do you experienced guys recommend?
Former Vendor
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
It depends on what blocks your BLMs are rich or lean in. The most important thing is not to go lean under accelleration. Also you don't want it so rich it washes out the rings. To me this is where a wideband is really useful. You can see while you drive what's going on.
Be forwarned, I do not claim to be an expert at this.
Be forwarned, I do not claim to be an expert at this.
Last edited by Paul Ruggeri; Jun 14, 2010 at 12:16 PM.
Safety Car
Joined: Sep 2001
Posts: 4,153
Likes: 553
From: Glenbeulah Wi
If you are starting with a clean sheet of paper you can leave the PE vs RPM at zero but if you are starting with a factory tune just leave those settings in place until you can get some real data. Just make sure you set the PE AFR at a decient number like 12.5 to 1 AFR which is = to 1.176 when the car is warmed up. 14.7/12.5 is how you determine the number.
Race Director
Joined: Jun 2004
Posts: 13,949
Likes: 705
From: WI
If you are starting with a clean sheet of paper you can leave the PE vs RPM at zero but if you are starting with a factory tune just leave those settings in place until you can get some real data. Just make sure you set the PE AFR at a decient number like 12.5 to 1 AFR which is = to 1.176 when the car is warmed up. 14.7/12.5 is how you determine the number.
Safety Car
Joined: Sep 2001
Posts: 4,153
Likes: 553
From: Glenbeulah Wi
The table needs you need to add 15% more fuel in PE to get an AFR or 12.78 so the table should read 15% not 11.5%. 11.5% would give you a commanded AFR or 13.18. After that you need to adjust the PE vs RPM table to fine tune the WOT AFR.
Last edited by bjankuski; Jun 10, 2010 at 01:35 PM.
