Got the HD on the dyno!
04-29-2003, 09:42 AM
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Got the HD on the dyno!
The new shop is coming along. The dyno was dropped into the ground last Friday, and we were strapping down our own cars on Saturday. 
Jason put his '02 Avalanche 5.3L on and put down 241 RWHP with the UPD induction being the only mod. It seems that Jason was worried about me cracking the Ave on the dyno. After my truck was strapped down, Jason unplugged the MAF sensor when I wasn't looking. The first pull was no good because I still had the stock limiter in place. A quick reprogram with the HPP3 took care of that. With the limiter removed, the second run only netted 216 RWHP! 
I was still clueless as to the MAF being unplugged and was flat-out stumped. After laughing until he couldn't breathe, Jason admitted to unplugging the MAF. LOL! We plugged it back in, and she belted out 255 RWHP. I felt much better. 
I was pleased considering the 4.10's and 4L80E trans, much less the 265's! The mods include UPD induction, HPP3 87 octane tuning (added at LEAST 20 RWHP 
), and custom Corsa cat-back exhaust. Next time she gets strapped down on the dyno she'll be sporting a new cam. 
The goal with the cam swap is to gain added low-end power for better pulling ability while also adding quite a bit of top-end horsepower with the stock tuning.
We didn't forget about all of the truck guys! Once we have some new results, I'll post up a graph with an overlay of old vs. new power, as well as complete cam specs. We want to have some first-hand experience with a cam in the 6.0L and how the specs affect the low-end, mid-range, and top-end before making any suggestions. Jason did have a 216/220 114 LSA and 220/220 112 LSA in his 6.0L, but we don't have any dyno results from them since his Silverado is already taken apart. I'm considering duration @ .050" in the 212-214 degree range on a 112 or 113 LSA. We have a few different specs in mind, but we'll keep everyone posted.
FYI, for all of the local guys, we hope to have a grand opening with the new shop in the next 30 days.
Trevor
Jason put his '02 Avalanche 5.3L on and put down 241 RWHP with the UPD induction being the only mod. It seems that Jason was worried about me cracking the Ave on the dyno. After my truck was strapped down, Jason unplugged the MAF sensor when I wasn't looking. The first pull was no good because I still had the stock limiter in place. A quick reprogram with the HPP3 took care of that. With the limiter removed, the second run only netted 216 RWHP! I was still clueless as to the MAF being unplugged and was flat-out stumped. After laughing until he couldn't breathe, Jason admitted to unplugging the MAF. LOL! We plugged it back in, and she belted out 255 RWHP. I felt much better. I was pleased considering the 4.10's and 4L80E trans, much less the 265's! The mods include UPD induction, HPP3 87 octane tuning (added at LEAST 20 RWHP ), and custom Corsa cat-back exhaust. Next time she gets strapped down on the dyno she'll be sporting a new cam. The goal with the cam swap is to gain added low-end power for better pulling ability while also adding quite a bit of top-end horsepower with the stock tuning.We didn't forget about all of the truck guys! Once we have some new results, I'll post up a graph with an overlay of old vs. new power, as well as complete cam specs. We want to have some first-hand experience with a cam in the 6.0L and how the specs affect the low-end, mid-range, and top-end before making any suggestions. Jason did have a 216/220 114 LSA and 220/220 112 LSA in his 6.0L, but we don't have any dyno results from them since his Silverado is already taken apart. I'm considering duration @ .050" in the 212-214 degree range on a 112 or 113 LSA. We have a few different specs in mind, but we'll keep everyone posted.
FYI, for all of the local guys, we hope to have a grand opening with the new shop in the next 30 days.
Trevor
04-30-2003, 08:52 AM
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Re: Got the HD on the dyno!
We'll definitely keep everyone posted!
Neil - The HD was a little over 300 lbs./ft. of RWTQ once it leveled off at around 4,000 RPM. If I remember right, the 5.3L was right around 285 lbs./ft. I'll have to look at the graph again to see at what RPM, though. We're gonna have to have the dueling of the HD's sometime.
Trevor
Neil - The HD was a little over 300 lbs./ft. of RWTQ once it leveled off at around 4,000 RPM. If I remember right, the 5.3L was right around 285 lbs./ft. I'll have to look at the graph again to see at what RPM, though. We're gonna have to have the dueling of the HD's sometime.
Trevor
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