DeloreanJoshQ
05-27-2011, 10:18 PM
Tonight I decided the time was right to take VIN 3307 to the track to see the performance increases over the stock engine set-up.
Let me first set you up on the background....
I have drag raced casually for over 12 years, not professionally, but I know my way around the track, tree, and driving techniques comfortably....
I did not get to drive or test my car before the performance upgrades to have a comparison...The car runs great; no hesitation, smooth acceleration, etc. However, I don't have a stock car to drive and compare to.....
Below are the parts that differ from stock:
DMC-CA Performance Camshafts (advertised +62HP)
http://www.dmccal.com/102707hp_high_performance_cams.html
Ported and Polished Heads,Valve Job (HP increase unknown)
Cat Converter Delete Pipe (HP increase unknown)
K&N Filter/Hervey Cold Air Intake (HP increase unknown)
Taylor 8mm Wires, Pertronix Coil (HP increase unknown)
There is only one major variable which has been brought up: The exhaust. I have stock manifolds, cross-over pipe, no cat, and stock muffler. More on this later...
Before I went to the track I researched what a stock Delorean would do in the quarter-mile.I went to Tamir's site and found the following sources to give me a good estimate:
I didn't want to trust one source for fear of manipulation of the magazine writers...but they all showed results in the 17-17.9 second/76.5-79mph range....
Road and Track - Dec '81
http://www.entermyworld.com/cat/articles/roadandtrack/rtdec81e1x1.jpg
17.9 seconds/76.5 mph
Car and Driver - Dec '81
http://www.entermyworld.com/cat/articles/caranddriver/cddec81f1x1.jpg
17.0 sec/79 mph
Motor Trend Dec '81
http://www.entermyworld.com/cat/articles/motortrend/mtdec81e1x1.jpg
17.61sec/77.4 mph
Motor Trend April '82
http://www.entermyworld.com/cat/articles/motortrend/mtapr82g1x1.jpg
17.45 secons/77.7 mph
Alright, so now I have something to compare to...so here we go...
First run, in-car camera(wife)
http://www.youtube.com/user/joshjegs?feature=mhee#p/u/3/EYSH1QHELMA
[email protected]
Shifted at around 6000 rpms, stayed in 3rd gear
Second run...
http://www.youtube.com/user/joshjegs?feature=mhee#p/u/2/ymO2iX6Hrbs
[email protected]
Shifted at 5500 rpms, stayed in 3rd gear
Third and final run..
http://www.youtube.com/user/joshjegs?feature=mhee#p/u/1/U0tX6N6yJ-w
[email protected]
Shifted at 6000 rpms, stayed in 3rd gear
At this point I decided my driving skill would not improve the cars performance significantly any further....
So now I am frustrated because I am lining up with stock performance after all of the hard work(ex. 2nd run nearly identical to Road and Track results)to improve it and now I want to figure out why my car is peforming exactly like a stock Delorean....
The camshafts were supposed to add the most HP to my car, so they are the first to research and rule out in a few ways....
-Below is a video of the idle of my car:
http://www.youtube.com/user/joshjegs?feature=mhee#p/a/u/0/QGYuTaLD060
Can anyone confirm by audio comparison if the idle matches that of the idle of a car with the DMC CA camshafts?
Does anyone know the camshaft lift for the intake and exhaust for both stock and DMC CA camshafts? I would like to remove a valve cover and mic the intake and exhaust lobes to check lift...
I have close access to a performance shop with a Mustang dyno and can take the car there to check HP figures...but I am guessing they are going to align with stock engine specs based off of tonight's runs....
As I stated, the car starts up great cold, warm, or hot, idles nicely, no hesitation, smooth acceleration....just doesn't appear to have the performance that I believe it should with what was done....
I talked to Danny B at DMC CA, he said he had never heard of any issues with the cams and that everyone he had talked to were happy with the performance increase...he did not have the specs on the stock and peformance cams; I have to wait until Tues for Don to be available to get them...
Danny said that they always have the stage one exhaust on their cars with the camshafts and recommended it....I understand that the stock exhaust would decrease some of the HP potential...but it is hard for me to believe it would restrict nearly all of it...
Anyone have any other ideas or opinions on what parts and where to check?
I'd really appreciate it!
Josh Q
Let me first set you up on the background....
I have drag raced casually for over 12 years, not professionally, but I know my way around the track, tree, and driving techniques comfortably....
I did not get to drive or test my car before the performance upgrades to have a comparison...The car runs great; no hesitation, smooth acceleration, etc. However, I don't have a stock car to drive and compare to.....
Below are the parts that differ from stock:
DMC-CA Performance Camshafts (advertised +62HP)
http://www.dmccal.com/102707hp_high_performance_cams.html
Ported and Polished Heads,Valve Job (HP increase unknown)
Cat Converter Delete Pipe (HP increase unknown)
K&N Filter/Hervey Cold Air Intake (HP increase unknown)
Taylor 8mm Wires, Pertronix Coil (HP increase unknown)
There is only one major variable which has been brought up: The exhaust. I have stock manifolds, cross-over pipe, no cat, and stock muffler. More on this later...
Before I went to the track I researched what a stock Delorean would do in the quarter-mile.I went to Tamir's site and found the following sources to give me a good estimate:
I didn't want to trust one source for fear of manipulation of the magazine writers...but they all showed results in the 17-17.9 second/76.5-79mph range....
Road and Track - Dec '81
http://www.entermyworld.com/cat/articles/roadandtrack/rtdec81e1x1.jpg
17.9 seconds/76.5 mph
Car and Driver - Dec '81
http://www.entermyworld.com/cat/articles/caranddriver/cddec81f1x1.jpg
17.0 sec/79 mph
Motor Trend Dec '81
http://www.entermyworld.com/cat/articles/motortrend/mtdec81e1x1.jpg
17.61sec/77.4 mph
Motor Trend April '82
http://www.entermyworld.com/cat/articles/motortrend/mtapr82g1x1.jpg
17.45 secons/77.7 mph
Alright, so now I have something to compare to...so here we go...
First run, in-car camera(wife)
http://www.youtube.com/user/joshjegs?feature=mhee#p/u/3/EYSH1QHELMA
[email protected]
Shifted at around 6000 rpms, stayed in 3rd gear
Second run...
http://www.youtube.com/user/joshjegs?feature=mhee#p/u/2/ymO2iX6Hrbs
[email protected]
Shifted at 5500 rpms, stayed in 3rd gear
Third and final run..
http://www.youtube.com/user/joshjegs?feature=mhee#p/u/1/U0tX6N6yJ-w
[email protected]
Shifted at 6000 rpms, stayed in 3rd gear
At this point I decided my driving skill would not improve the cars performance significantly any further....
So now I am frustrated because I am lining up with stock performance after all of the hard work(ex. 2nd run nearly identical to Road and Track results)to improve it and now I want to figure out why my car is peforming exactly like a stock Delorean....
The camshafts were supposed to add the most HP to my car, so they are the first to research and rule out in a few ways....
-Below is a video of the idle of my car:
http://www.youtube.com/user/joshjegs?feature=mhee#p/a/u/0/QGYuTaLD060
Can anyone confirm by audio comparison if the idle matches that of the idle of a car with the DMC CA camshafts?
Does anyone know the camshaft lift for the intake and exhaust for both stock and DMC CA camshafts? I would like to remove a valve cover and mic the intake and exhaust lobes to check lift...
I have close access to a performance shop with a Mustang dyno and can take the car there to check HP figures...but I am guessing they are going to align with stock engine specs based off of tonight's runs....
As I stated, the car starts up great cold, warm, or hot, idles nicely, no hesitation, smooth acceleration....just doesn't appear to have the performance that I believe it should with what was done....
I talked to Danny B at DMC CA, he said he had never heard of any issues with the cams and that everyone he had talked to were happy with the performance increase...he did not have the specs on the stock and peformance cams; I have to wait until Tues for Don to be available to get them...
Danny said that they always have the stage one exhaust on their cars with the camshafts and recommended it....I understand that the stock exhaust would decrease some of the HP potential...but it is hard for me to believe it would restrict nearly all of it...
Anyone have any other ideas or opinions on what parts and where to check?
I'd really appreciate it!
Josh Q