06 GT N/A Dyno With Brenspeed cams
08-05-2012, 01:51 AM
#12
5th Gear Member
Join Date: Oct 2009
Location: Maui
Posts: 4,752
08-05-2012, 07:32 AM
#14
Thread Starter
Join Date: Feb 2012
Location: PA
Posts: 30
Yes. I love'em haha
Without bragging I did notice most people nail low 13s with the same set up, so I smiled hehe.
Hoping for 12.3 or faster now with the same Nitto 555s hehe
Hoping for 12.3 or faster now with the same Nitto 555s hehe
08-05-2012, 03:21 PM
#16
Thread Starter
Join Date: Feb 2012
Location: PA
Posts: 30
I picked Brenspeed because they were NSR cams. Their price was also reasonable and Brenspeed is a blessing to deal with. I have seen only a few dyno for the Hot Rods and they don't seem to gain much? Maybe I haven't seen enough of them?
08-06-2012, 06:27 AM
#19
Thread Starter
Join Date: Feb 2012
Location: PA
Posts: 30
Again, don't take my word for it, I don't know enough about them but The Rockers are proven over and over.
08-08-2012, 07:06 AM
#20
Thread Starter
Join Date: Feb 2012
Location: PA
Posts: 30
**** times! The car ran SLOWER. Here are my only guesses.
My limiter was originally set to 6800 but I would shift at 6600. When I got the car dyno tuned, the limiter was 6500 for some reason. My guy told me it was set that way since the cams stop BUILDING power at that point. Which is true BUT they had not dipped yet. They have shown in other dynos I have searched that they hold steady until about 7k. I do not have the valve train for 7k so 6800 is the highest I can go safely.
Since cams make power up top vs down low, the limiter being lower is killing my shift point for the land point. I ran 13.087 @ 107.80 with a 1.852 60'. The new 60 is a personal best despite everything else so I was excited for a great run but I banged the limiter in 1st, 2nd and 3rd. By it pulling harder, coupled with a lower limiter, my shifttiming was horribly off.
I reflashed it with the same tune, only change being the limiter from 6500 to 6800. Ran again. With a 1.9 60' I got a 13.026 at 109.00 MPH. This is not right, good launch, no banging the limiter. Throttle response was also a huge issue since the cams.
My explanation is simply on the dyno the car obviously is accelerated slowly but at the track it may be pulling timing, or simply, the peak HP is a nice number but the tune itself may have an issue.
So after 4 ****ty *** runs I go home. I know the heat played a factor but with a composite manifold, it isn't as huge an issue. I should have still trapped 110.5 to 111.5 in the 82 degree 78% humidity.
I go home frustrated and go load an email tune I got before I installed the parts from my original tuning solution. All my old runs were on email tunes. The dyno tune should only been better BUT that was not the case.
After loading the bama email tune and the limiter being at 6800, I go for a test drive.
WOW!! ANYONE could tell how much better it ran. The car raped in all 3 first gears on the email tune vs the dyno tune, which again, obviously should have been better. I was breaking the tires loose on the street in 2nd by just punching it around 35 MPH. Something I could not do on the dyno tune.
So, now I am going back next Tuesday to try the new tune, then I will bring the tuner in case there is need to revert or compare tunes.
I am happy I seem to have resolved the issue, but sad that the extra money spent on a dyno tune did not yield positive results.
Tires were not an issue at the track having nailed a 1.852 60' despite the new goodies launching at 4500 RPM
My limiter was originally set to 6800 but I would shift at 6600. When I got the car dyno tuned, the limiter was 6500 for some reason. My guy told me it was set that way since the cams stop BUILDING power at that point. Which is true BUT they had not dipped yet. They have shown in other dynos I have searched that they hold steady until about 7k. I do not have the valve train for 7k so 6800 is the highest I can go safely.
Since cams make power up top vs down low, the limiter being lower is killing my shift point for the land point. I ran 13.087 @ 107.80 with a 1.852 60'. The new 60 is a personal best despite everything else so I was excited for a great run but I banged the limiter in 1st, 2nd and 3rd. By it pulling harder, coupled with a lower limiter, my shifttiming was horribly off.
I reflashed it with the same tune, only change being the limiter from 6500 to 6800. Ran again. With a 1.9 60' I got a 13.026 at 109.00 MPH. This is not right, good launch, no banging the limiter. Throttle response was also a huge issue since the cams.
My explanation is simply on the dyno the car obviously is accelerated slowly but at the track it may be pulling timing, or simply, the peak HP is a nice number but the tune itself may have an issue.
So after 4 ****ty *** runs I go home. I know the heat played a factor but with a composite manifold, it isn't as huge an issue. I should have still trapped 110.5 to 111.5 in the 82 degree 78% humidity.
I go home frustrated and go load an email tune I got before I installed the parts from my original tuning solution. All my old runs were on email tunes. The dyno tune should only been better BUT that was not the case.
After loading the bama email tune and the limiter being at 6800, I go for a test drive.
WOW!! ANYONE could tell how much better it ran. The car raped in all 3 first gears on the email tune vs the dyno tune, which again, obviously should have been better. I was breaking the tires loose on the street in 2nd by just punching it around 35 MPH. Something I could not do on the dyno tune.
So, now I am going back next Tuesday to try the new tune, then I will bring the tuner in case there is need to revert or compare tunes.
I am happy I seem to have resolved the issue, but sad that the extra money spent on a dyno tune did not yield positive results.
Tires were not an issue at the track having nailed a 1.852 60' despite the new goodies launching at 4500 RPM