Dyno and Track Analysis of Exhaust Systems
Senior Member
Joined: Jun 2000
Posts: 258
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From: Oak Park, CA USA
Nice post bobcmt.
What model # cats were you testing from Magnaflow and Bassani?
I sometimes get confused as there seem to be many model numbers (duplicate???) for what look like the same 2 1/2 in--2 1/2 out Cat.
Thanks,
Douglas
What model # cats were you testing from Magnaflow and Bassani?
I sometimes get confused as there seem to be many model numbers (duplicate???) for what look like the same 2 1/2 in--2 1/2 out Cat.
Thanks,
Douglas
Last edited by Big1Daddy; Jan 3, 2003 at 07:55 PM.
Former Sponsor
Joined: Mar 2001
Posts: 453
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From: Freehold, NJ, USA
RESULT: 12-15 hp increase in peak hp at ~ 5000 rpm. While that does not sound like much, at 3800 (lowest measured rpm) torque was up 50-60 lb-ft and hp 40-50! This level of gain slowly tapered to the 12 -15 at 5000 rpm and stayed at that level or greater until 5700+. A lot of new area under the curve and very noticible at seat-of-pants. The same level of gain was seen with two different chip programs and and one program was run twice in both BEFORE and AFTER configurations to verify consistency of the numbers. Gains were likely higher at still lower rpm and more so had I started with a full set of stock cats.
Bob,
Thanks for calling me and sharing the information with me. You and the HALO guys are doing the Lightning community proud with your testing. I know your truck has ran a best of 12.0 with the JDM chip and now with the JDM Long Tube Headers there's no doubt you should be an 11.80 truck. I know your goal was to get into the 11's and becuase of all your research and testing now that you have the right combination you should definitely meet your goal. Good luck. You should send your chip back in for a little more fuel after seeing your dyno graphs.
Jim@JDM
PS- I went over to the HALO board and I see the top 3 fastest trucks all are JDM enhanced. Same goes for the TALON club and the Austin club.
Senior Member
Joined: Nov 2001
Posts: 633
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From: Houston, TX
Jim@JDM
PS- I went over to the HALO board and I see the top 3 fastest trucks all are JDM enhanced. Same goes for the TALON club and the Austin club.
PS- I went over to the HALO board and I see the top 3 fastest trucks all are JDM enhanced. Same goes for the TALON club and the Austin club.
Former Sponsor
Joined: Mar 2001
Posts: 453
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From: Freehold, NJ, USA
MadNess,
Just went back to the HALO board...
I just clicked on the fastest Gen2's. I didn't realize you separated the nitrous users. Sorry.
HALO's fastest non-nitorus.
1/4 Mile'ers - Time - Tracks HRP, HRW, RCR
1. - Paul G. - 11.76W - HRP
2. - Keith S - 11.90W - HRP
3. - Bob C - 12.095W - HRP
4. - Steve S - 12.11W - HRP
5. - Shane Mc - 12.120W - HRW
6. - Andre T - 12.129S - HRP
7. - Jerrod G - 12.205W - HRP
8. - Brian E. - 12.26W - HRP
9. - Chris S - 12.26W - HRP
10. - Dale O - 12.33W - HRP
HALO's fastest nitrous trucks..
1/4 Mile'ers
Sal M - 10.48 - 200 Shot - Gen 2
Andre T - 11.41 - 90 Shot - Gen 2
John B - 11.89 - 150 Shot - Gen 2
Jerrod G - 11.97 - 100 Shot Gen 2
Chuck S. - 12.18 - 100 Shot Gen 2
Tim V - 12.30 - 60 Shot - Gen 2
Jacob L - 12.33W 50 Shot - Gen 2
Just went back to the HALO board...
I just clicked on the fastest Gen2's. I didn't realize you separated the nitrous users. Sorry.
HALO's fastest non-nitorus.
1/4 Mile'ers - Time - Tracks HRP, HRW, RCR
1. - Paul G. - 11.76W - HRP
2. - Keith S - 11.90W - HRP
3. - Bob C - 12.095W - HRP
4. - Steve S - 12.11W - HRP
5. - Shane Mc - 12.120W - HRW
6. - Andre T - 12.129S - HRP
7. - Jerrod G - 12.205W - HRP
8. - Brian E. - 12.26W - HRP
9. - Chris S - 12.26W - HRP
10. - Dale O - 12.33W - HRP
HALO's fastest nitrous trucks..
1/4 Mile'ers
Sal M - 10.48 - 200 Shot - Gen 2
Andre T - 11.41 - 90 Shot - Gen 2
John B - 11.89 - 150 Shot - Gen 2
Jerrod G - 11.97 - 100 Shot Gen 2
Chuck S. - 12.18 - 100 Shot Gen 2
Tim V - 12.30 - 60 Shot - Gen 2
Jacob L - 12.33W 50 Shot - Gen 2
Member
Joined: Mar 2002
Posts: 96
Likes: 0
From: Houston
Originally posted by Jim@JDM
MadNess,
Just went back to the HALO board...
I just clicked on the fastest Gen2's. I didn't realize you separated the nitrous users. Sorry.
HALO's fastest non-nitorus.
1/4 Mile'ers - Time - Tracks HRP, HRW, RCR
1. - Paul G. - 11.76W - HRP
2. - Keith S - 11.90W - HRP
3. - Bob C - 12.095W - HRP
4. - Steve S - 12.11W - HRP
5. - Shane Mc - 12.120W - HRW
6. - Andre T - 12.129S - HRP
7. - Jerrod G - 12.205W - HRP
8. - Brian E. - 12.26W - HRP
9. - Chris S - 12.26W - HRP
10. - Dale O - 12.33W - HRP
[/i]
MadNess,
Just went back to the HALO board...
I just clicked on the fastest Gen2's. I didn't realize you separated the nitrous users. Sorry.
HALO's fastest non-nitorus.
1/4 Mile'ers - Time - Tracks HRP, HRW, RCR
1. - Paul G. - 11.76W - HRP
2. - Keith S - 11.90W - HRP
3. - Bob C - 12.095W - HRP
4. - Steve S - 12.11W - HRP
5. - Shane Mc - 12.120W - HRW
6. - Andre T - 12.129S - HRP
7. - Jerrod G - 12.205W - HRP
8. - Brian E. - 12.26W - HRP
9. - Chris S - 12.26W - HRP
10. - Dale O - 12.33W - HRP
[/i]
Sal's coming in next week to do some tuning....Enjoy it while we can...
JDM.......
Senior Member
Joined: Aug 1999
Posts: 5,438
Likes: 1
From: Palm Coast, FL
Originally posted by Silver_2000_
!
Andre Is Sal an honorary member ? Or did he run 10.48 in Texas while he was there ?
Doug
! Andre Is Sal an honorary member ? Or did he run 10.48 in Texas while he was there ?
Doug
I am an honorary member, but I really don't think I belong on that list.
Senior Member
Joined: May 2000
Posts: 1,363
Likes: 0
After looking at those dyno graphs again I got to thinking and I wonder why in 1999 and early 2000 a lot of L owners installed the full Bassani exhaust and netted little if any hp increase and virtually no ET improvement. Now after seeing the Halo club tests we are seeing 40+ hp at the rear wheels by the addittion of the full headers and high flow cats. I wonder if bobcmt's truck was just a freak?
Senior Member
Joined: Mar 2000
Posts: 1,151
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From: President HALO
Originally posted by Silver_2000_!
Andre Is Sal an honorary member ? Or did he run 10.48 in Texas while he was there ?
Doug
! Andre Is Sal an honorary member ? Or did he run 10.48 in Texas while he was there ?
Doug
I am getting ready for the 2003 CCB which is on a 1/8 mile track with little or no traction most of the time. Sorry for the long explanation but "The Truth Will Set You Free"
Senior Member
Joined: Jan 2000
Posts: 2,328
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From: Houston, Tx, USA
WINNINGEST TRUCK IN HALO!
Noel
Sorry guys couldn't resist; I am not in the fastest as consistantcy rather than speed is my goal and I do not run the 1/4 mile as my truck is set up for the 1/8. I did run a 7.92 last night but that's only about a 12.43 in the 1/4. My truck is fixing to get slower as I will be removing my 2400 stall and replacing it with a stock stall. Stalls SUCK for bracket racing. This will cost me about .17 but by lowering my launch rpm from 2500 to 1500 my 60's will become much more consistant.
noelvm
Noel
Sorry guys couldn't resist; I am not in the fastest as consistantcy rather than speed is my goal and I do not run the 1/4 mile as my truck is set up for the 1/8. I did run a 7.92 last night but that's only about a 12.43 in the 1/4. My truck is fixing to get slower as I will be removing my 2400 stall and replacing it with a stock stall. Stalls SUCK for bracket racing. This will cost me about .17 but by lowering my launch rpm from 2500 to 1500 my 60's will become much more consistant.
noelvm