Adjusting tune for new manifold
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Joined: Jan 2008
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From: Middle of No where AK
Adjusting tune for new manifold
Ok so Im gonna be changing my factory manifold over to a fast manifold. I know Im going to need to take a few degrees of timing out from what I understand to compensate for the extra air flow. But what else do I need to adjust to correctly compensate for the new air flow? Thanks for the insight.
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....probably will want to recalibrate MAF and VE to get your AFR's back on the mark. What do your STFT/LTFT values look like after the install?
....assumption is that you have either HP Tuners or EFILive
....assumption is that you have either HP Tuners or EFILive
Last edited by Motorhead-47; Feb 20, 2010 at 08:12 PM.
Thread Starter
Safety Car
Joined: Jan 2008
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From: Middle of No where AK
I have hp tuners. I havent done the install yet. I want to know where to look after though. Im not sure how to adjust all of the parameters youre talking about. Im pretty novice as far as tuning goes but I really want to learn thats why Im asking.
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Fully understand your position...I still consider myself a "novice" with HP Tuners even after a year of tweaking on my car. Your comfortable with logging data correct? What you want to do is see where your Short Term Fuel Trims and Long Term Fuel Trims are running. IMHO if your LTFT's are running > +/- 5% you should look at calibrating both your MAF and VE. Stroll over to HP Tuners Forums and start reading until you are blue in the face. Learning to calibrate the MAF and VE are where you want to start...MAF being easier to grasp than the VE side.
Thread Starter
Safety Car
Joined: Jan 2008
Posts: 4,711
Likes: 3
From: Middle of No where AK
Fully understand your position...I still consider myself a "novice" with HP Tuners even after a year of tweaking on my car. Your comfortable with logging data correct? What you want to do is see where your Short Term Fuel Trims and Long Term Fuel Trims are running. IMHO if your LTFT's are running > +/- 5% you should look at calibrating both your MAF and VE. Stroll over to HP Tuners Forums and start reading until you are blue in the face. Learning to calibrate the MAF and VE are where you want to start...MAF being easier to grasp than the VE side.
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Joined: Sep 2007
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.... no doubt there are some experts over on that forum who are more than glad to tell you just how much smarter they are than you....just develop a thick skin, read all you can, experiment and then come back and ask questions when you've run out of ideas.
Thread Starter
Safety Car
Joined: Jan 2008
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From: Middle of No where AK
.
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
Been there...still doing that! To be fair to those guys though I have found if they feel you are truly trying to learn and can provide them with data to work with there are a few guys that will jump in and assist. I've recently learned a ton from "WSTAAB" who also frequents this forum. 
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