Engine Brake programming
Thread Starter
Racer
Joined: Nov 2004
Posts: 482
Likes: 7
From: Greenville Texas
Engine Brake programming
07 Z06, full exhaust, intake, untuned making 485rwhp.
I have a fairly nasty 94 Z28. 383 H/C/I. Used to have spray and ran high 10's, etc.
My question is this: The Camaro used to engine brake hard. If I left off of the gas in gear at 5k rpm, it would slow me down quite a bit. The Z06 seems to sit at the same rpm and slowly drop. Without any major modifications, what is the possibility of getting this car to engine brake better? Any damage foreseen to the stock components?
I have a fairly nasty 94 Z28. 383 H/C/I. Used to have spray and ran high 10's, etc.
My question is this: The Camaro used to engine brake hard. If I left off of the gas in gear at 5k rpm, it would slow me down quite a bit. The Z06 seems to sit at the same rpm and slowly drop. Without any major modifications, what is the possibility of getting this car to engine brake better? Any damage foreseen to the stock components?
Racer
Joined: Dec 2012
Posts: 319
Likes: 30
From: Mesa/Phoenix Arizona
This is an interesting idea. I have a c6z too and would like if it would "brake" a bit harder when off throttle/down shifting. I used to have a 350z and it would engine break much better than the Vette.
Any answers out there?
Any answers out there?
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
I would mess with DFCO and min airflow to see they make any difference. Drastically reduce the min airflow able above 1200 RPM's and see if it makes any difference at all
Also see if DFCO is using stock settings or if it has been disabled.
It's a total guess on my part but that is what I would try..
Also see if DFCO is using stock settings or if it has been disabled.
It's a total guess on my part but that is what I would try..
Last edited by schpenxel; Feb 4, 2016 at 03:01 PM.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
If you alter the minimum idle airflow table you risk having the engine DIE wen you lift off the gas---On a stockish engine I wouldn't mess with it
The DFCO is deceleration fuel cut-off------You can try disabling the DFCO---But I doubt you will get any engine braking--
The DFCO is deceleration fuel cut-off------You can try disabling the DFCO---But I doubt you will get any engine braking--
Thread Starter
Racer
Joined: Nov 2004
Posts: 482
Likes: 7
From: Greenville Texas
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Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
I'm telling you, try lowering min airflow and if you really want RPM's to drop fast when press the clutch in then enable clutch fuel cutoff (CFCO). I've had mine where it drops faster than I can shift without looking like a maniac before.
May not help on yours but I bet it does.
May not help on yours but I bet it does.