New Tune - Running Smooth - ZR-1 Net Registry Forums

gbmidyear66 · 08-01-2010

I have not been happy with my cars idle behaviour. I have a DRM PROM, and it was set to idle high - about 800 RPM (presumably for a single mass flywheel), also - the car would hang at 1200+ RPM for four or five seconds AFTER coming to a complete stop. I find this annoying as I routinely get stuck in stop and go traffic.

I had some dialogue with Dominic (XfireZ51) who offered to tune my cars idle behaviour for me at a very reasonable cost. I bought a Moates adapter (so that the original PROM is not touched) - the calibration changes reside in an external EPROM on the Moates adapter, which plugs into the original ECM slot.

So I installed the new tune today - and it is a huge improvement.

Domenic reduced the IAC delay so that the car comes down to baseline idle (now 650 RPM) quickly after stopping (this feature is not avail on any of the other PROMS out there that I am aware of)

He also reduced the knock retard to 5 degrees from 10 degrees, on hard acceleration - which adds a few extra HP.

I think I am done now till the fall when I'll be looking at porting the Plenum and IH.

-=Jeff=- · 08-01-2010

COOL DEAL!! glad it worked for you

FYI keep an eye on the moates adapter, They have been known to fall out of the ECM socket..

XfireZ51 · 08-01-2010

Glenn,

Thx. always a pleasure when things work out. Let me know how it continues to run as you take it out.

08-01-2010	#1
gbmidyear66 Join Date: Feb 2008 Location: Vancouver, BC Posts: 252	New Tune - Running Smooth I have not been happy with my cars idle behaviour. I have a DRM PROM, and it was set to idle high - about 800 RPM (presumably for a single mass flywheel), also - the car would hang at 1200+ RPM for four or five seconds AFTER coming to a complete stop. I find this annoying as I routinely get stuck in stop and go traffic. I had some dialogue with Dominic (XfireZ51) who offered to tune my cars idle behaviour for me at a very reasonable cost. I bought a Moates adapter (so that the original PROM is not touched) - the calibration changes reside in an external EPROM on the Moates adapter, which plugs into the original ECM slot. So I installed the new tune today - and it is a huge improvement. Domenic reduced the IAC delay so that the car comes down to baseline idle (now 650 RPM) quickly after stopping (this feature is not avail on any of the other PROMS out there that I am aware of) He also reduced the knock retard to 5 degrees from 10 degrees, on hard acceleration - which adds a few extra HP. I think I am done now till the fall when I'll be looking at porting the Plenum and IH. __________________ [SIGPIC][/SIGPIC] __________________ 1990 Corvette ZR-1 #2824 4.10's, Custom PROM, Flowmaster, Top End Port NCRS BC Chapter

08-01-2010	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,150	Re: New Tune - Running Smooth COOL DEAL!! glad it worked for you FYI keep an eye on the moates adapter, They have been known to fall out of the ECM socket.. __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

08-01-2010	#3
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,696	Re: New Tune - Running Smooth Glenn, Thx. always a pleasure when things work out. Let me know how it continues to run as you take it out.