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turtle · 03-22-2006, 08:35 AM

PorscheDoc - if you are some way offended I apologize, or perhaps I am reading too much into it. The way you describe a knock sensor is only half the job for the VQ45 sensor. Intake air volume and temperature play a big part for it as well. All the chips were modding exactly as you specified - but as soon as more air started coming in, it would jump all over the ignition curve - even with new maps from such suppliers as Technosquare and Stillen. In this case, with all the extra fuel flow, it would be hard to see knocking unless you are in a high boost FI application.

We are a dealership that has been in business over 30 years, and we have been in tuning ever since previous owners son bought a new 260...tens of thousands of hours of performance work has been performed here, and all the techs that do it are master certified, and many of them race, track or strip, and sometimes both.
The mods to the knock sensor and the MAF have always been performed on cars that have already been remapped and have had extensive airflow work done on it. Perhaps you thought I was advocating it as a mod in and of itself. Not the case.
986Jim - good to see someone who has actually done it. I thought that it may be VQ45 specific. We recorded an increase of around 10% over the modded baseline on all of the Nissans we have done it to.
We only work on Nissans and Fords though, so the reason I posted here is to see if anyones has used it on a Porche.

It may or may not work, but untill someone tries,we won't know. I am waiting for LNS Motorsports, who seems to be the Porchse builders around here, to comment. I will let you guys know what goes on.
Cheers,
Turtle

03-22-2006, 08:35 AM	#14
turtle Registered User Join Date: Mar 2006 Location: tn Posts: 22	PorscheDoc - if you are some way offended I apologize, or perhaps I am reading too much into it. The way you describe a knock sensor is only half the job for the VQ45 sensor. Intake air volume and temperature play a big part for it as well. All the chips were modding exactly as you specified - but as soon as more air started coming in, it would jump all over the ignition curve - even with new maps from such suppliers as Technosquare and Stillen. In this case, with all the extra fuel flow, it would be hard to see knocking unless you are in a high boost FI application. We are a dealership that has been in business over 30 years, and we have been in tuning ever since previous owners son bought a new 260...tens of thousands of hours of performance work has been performed here, and all the techs that do it are master certified, and many of them race, track or strip, and sometimes both. The mods to the knock sensor and the MAF have always been performed on cars that have already been remapped and have had extensive airflow work done on it. Perhaps you thought I was advocating it as a mod in and of itself. Not the case. 986Jim - good to see someone who has actually done it. I thought that it may be VQ45 specific. We recorded an increase of around 10% over the modded baseline on all of the Nissans we have done it to. We only work on Nissans and Fords though, so the reason I posted here is to see if anyones has used it on a Porche. It may or may not work, but untill someone tries,we won't know. I am waiting for LNS Motorsports, who seems to be the Porchse builders around here, to comment. I will let you guys know what goes on. Cheers, Turtle Last edited by turtle; 03-22-2006 at 08:39 AM.