Hot Rod Cam results. Seem low to you? Also driving issues
07-02-2012, 01:14 PM
#1
3rd Gear Member
Thread Starter
Join Date: Mar 2007
Location: Houston, Texas
Posts: 814
Hot Rod Cam results. Seem low to you? Also driving issues
Sorry for the long post...
I did do a good amount of research before buying cams and i know the power increase is mostly different from car to car. First off, here are my power mods. JLT2 Cold air intake, SLP Longtube headers, catted xpipe, steeda CMCV deletes, FRPP Hot Rod Cams. This was taken on a mustangdyno(which can read low). 2005 Mustang GT Manual Horsepower without the cams 303/tq 318... with cams rwhp 319/tq 327. Dyno sheets posted below.
I've had cams in for a couple months and the car has been driving so-so. I know jumpy idle is normal but when i let off the gas, engage the clutch, or coast, the RPMs fall down to 500, then the car sounds like its trying to keep itself from stalling and jumps up to 1000rpm, then falls back to 800 and idles right around there. Its even worse with the A/C on, and i even had the A/C switch and motor replaced a few weeks ago bc they went out, and this problem occurred before and after. I also read clutch chatter is normal and i noticed a good amount when first installed, but it has been incrementally getting worse since the install, and turned from chatter to clanking, and like before 100times worse with the A/C on. I dont know if this is all just normal and the side effects of having cams, and if so i just need to get used to it, but im also concerned if i am getting enough power.
The only thing I can think of is a tuning issue, and i have talked to the tuner about it multiple times just for him to say that its either normal, or he doesnt notice anything wrong with it and they will not retune the car without charging me another $250 for retune.
Sounds good though! Video here
I did do a good amount of research before buying cams and i know the power increase is mostly different from car to car. First off, here are my power mods. JLT2 Cold air intake, SLP Longtube headers, catted xpipe, steeda CMCV deletes, FRPP Hot Rod Cams. This was taken on a mustangdyno(which can read low). 2005 Mustang GT Manual Horsepower without the cams 303/tq 318... with cams rwhp 319/tq 327. Dyno sheets posted below.
I've had cams in for a couple months and the car has been driving so-so. I know jumpy idle is normal but when i let off the gas, engage the clutch, or coast, the RPMs fall down to 500, then the car sounds like its trying to keep itself from stalling and jumps up to 1000rpm, then falls back to 800 and idles right around there. Its even worse with the A/C on, and i even had the A/C switch and motor replaced a few weeks ago bc they went out, and this problem occurred before and after. I also read clutch chatter is normal and i noticed a good amount when first installed, but it has been incrementally getting worse since the install, and turned from chatter to clanking, and like before 100times worse with the A/C on. I dont know if this is all just normal and the side effects of having cams, and if so i just need to get used to it, but im also concerned if i am getting enough power.
The only thing I can think of is a tuning issue, and i have talked to the tuner about it multiple times just for him to say that its either normal, or he doesnt notice anything wrong with it and they will not retune the car without charging me another $250 for retune.
Sounds good though! Video here
Last edited by 05slpGT; 07-02-2012 at 01:40 PM.
07-03-2012, 07:01 AM
#6
4th Gear Member
Join Date: Apr 2009
Location: The Rocket City, AL
Posts: 1,881
You didn't mention what headers you have installed. Stock? I had the same issues with my stock headers. Driveability was so-so and at slower speeds (45mph and below) in 5th gear the car would buck. 6 months later I had some Kooks LT's installed and the difference was night and day... 200% improvement.
07-03-2012, 08:08 AM
#7
2nd Gear Member
Join Date: Mar 2010
Location: Illinois
Posts: 473
Sorry for the long post...
I did do a good amount of research before buying cams and i know the power increase is mostly different from car to car. First off, here are my power mods. JLT2 Cold air intake, SLP Longtube headers, catted xpipe, steeda CMCV deletes, FRPP Hot Rod Cams. This was taken on a mustangdyno(which can read low). 2005 Mustang GT Manual Horsepower without the cams 303/tq 318... with cams rwhp 319/tq 327. Dyno sheets posted below.
I did do a good amount of research before buying cams and i know the power increase is mostly different from car to car. First off, here are my power mods. JLT2 Cold air intake, SLP Longtube headers, catted xpipe, steeda CMCV deletes, FRPP Hot Rod Cams. This was taken on a mustangdyno(which can read low). 2005 Mustang GT Manual Horsepower without the cams 303/tq 318... with cams rwhp 319/tq 327. Dyno sheets posted below.
07-03-2012, 10:51 AM
#9
2nd Gear Member
Join Date: Mar 2010
Location: Illinois
Posts: 473
They should work fine with stock headers though as well. I'm thinking when you had stocks and you went to LT's, you probably wrote a new tune for it. There was probably something not exactly right with your stock manifold tune. Just a hunch.
07-03-2012, 02:21 PM
#10
4th Gear Member
Join Date: Apr 2009
Location: The Rocket City, AL
Posts: 1,881
That could have something to do with it. I did load a new tune after installing the LT's. But I also was told and read around that the LT's help the engine breath better which I'm sure also helped.
