dyno results suck
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From: Tacoma, WA
dyno results suck check sig for mods
before headers, y and cam 313hp 332tq
after cam and headers 346hp 356tq
a friends 01 WS6 with same mods, cam, FLP's no cats and FTRA pulled 375hp what is the deal. to long tubes really make that much of a diff? also since I don't have the ls6 intake yet is that it. I know all cars are different but 30hp??? can long tubes and the intake get me the 30hp?
before headers, y and cam 313hp 332tq
after cam and headers 346hp 356tq
a friends 01 WS6 with same mods, cam, FLP's no cats and FTRA pulled 375hp what is the deal. to long tubes really make that much of a diff? also since I don't have the ls6 intake yet is that it. I know all cars are different but 30hp??? can long tubes and the intake get me the 30hp?
Re: dyno results suck I think it's the tuning not the headers. The MAC's in someways are one of the best designs for pure hp. The MAC cats aren't as good as stock.
My guess is the car is running a little richer than it should, this happens fairly often with headers.
I would suggest tuning or least a MAFT and A-tap to tweak the car in a little better. MTI did my mail order tuning, this was way cheaper than Predator, LS1 Edit or Ed Wright. My car isn't finished and so I haven't dyno'd etc but usually MTI can get the mail order tune very close. If you can get a dyno tune with LS1 Edit that best of all.
The LS6 intake will help too. I would do all the mod's then get the tuning so you don't have to redo the tuning. Predator might be a good way to go if you want to tune and then add mod's then retune. I would at least get a MAFT and get a friend to help dial the car in with Atap.
Good Luck
My guess is the car is running a little richer than it should, this happens fairly often with headers.
I would suggest tuning or least a MAFT and A-tap to tweak the car in a little better. MTI did my mail order tuning, this was way cheaper than Predator, LS1 Edit or Ed Wright. My car isn't finished and so I haven't dyno'd etc but usually MTI can get the mail order tune very close. If you can get a dyno tune with LS1 Edit that best of all.
The LS6 intake will help too. I would do all the mod's then get the tuning so you don't have to redo the tuning. Predator might be a good way to go if you want to tune and then add mod's then retune. I would at least get a MAFT and get a friend to help dial the car in with Atap.
Good Luck
Launching!
Joined: Mar 2002
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From: PA
Re: dyno results suck Most cams like to breath. Long tubes and a LS6 intake should help you get much closer to your buddy. Your air/fuel could have been out of wack from the mods, did you have wideband on it?
Re: dyno results suck the intake is probly worth 10, the LT's will do better with the cam than the midlengths.... but i dont think it'd do that much better. What was your a/f when you dyno'd?
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From: Tacoma, WA
Re: dyno results suck I had JohnB run A-tap while we were doing the runs he said everything was good. both me and my buddy have stock tuning also. everything we could think of just pointed back to the LT's and the intake. thanks for the feedback guys, anyone else have some.
Re: dyno results suck </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> I had JohnB run A-tap while we were doing the runs he said everything was good </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Things didn't look bad at first blush, however, I have had time to do a further review of the ATAP data and also a chance to compare your ATAP dyno run to Nate's.
Your O2's were right around 0.910-0.930, LTFT's were at zero during WOT (this is great!) and timing was at 25° which is reasonable for stock programming on a 2000. What I didn't notice at the time is that you had knock retard from the moment you nailed it at 2955 RPM up to the redline fuel shut-off. By the time the rev limiter kicked in you only had 1.3° of KR but still, this will cost you a few ponies.
Based on the KR (causing lower total timing), no LS6 intake, mid length headers vs. LT's and the fact that your motor has 30K+ miles versus Nate's 12K every car is different and 30 RWHP isn't that far out of reach recognizing these differences. He also de-screened his MAF.
Don't beat yourself up over this...it's possible that due to the size of the cam, it really needs more breathing potential and that's exactly what the LS6 intake and LT's provide not to mention your problem with less timing.
Get the LS6 intake, some good gas (Nate also cheated...he followed my instructions and went to Centex and filled up w/94 octane before his dyno run <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> ) and re-dyno. I think you'll close the gap a lot.
Your O2's were right around 0.910-0.930, LTFT's were at zero during WOT (this is great!) and timing was at 25° which is reasonable for stock programming on a 2000. What I didn't notice at the time is that you had knock retard from the moment you nailed it at 2955 RPM up to the redline fuel shut-off. By the time the rev limiter kicked in you only had 1.3° of KR but still, this will cost you a few ponies.
Based on the KR (causing lower total timing), no LS6 intake, mid length headers vs. LT's and the fact that your motor has 30K+ miles versus Nate's 12K every car is different and 30 RWHP isn't that far out of reach recognizing these differences. He also de-screened his MAF.
Don't beat yourself up over this...it's possible that due to the size of the cam, it really needs more breathing potential and that's exactly what the LS6 intake and LT's provide not to mention your problem with less timing.
Get the LS6 intake, some good gas (Nate also cheated...he followed my instructions and went to Centex and filled up w/94 octane before his dyno run <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> ) and re-dyno. I think you'll close the gap a lot.
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Thread Starter
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From: Tacoma, WA
Re: dyno results suck thanx john since I'm leaving it will have o wait till I get back. but I will take your words to heart. I, hopefully we can take this in to account when I am ready to do the really big mods and not spare on the details. once again thanx john for helping out with this. I come by and talk w/ you before I go. J
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From: Brentwood, Ca
Re: dyno results suck </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 99 Black Bird T/A:
<strong> I would at least get a MAFT and get a friend to help dial the car in with Atap.
Good Luck</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What's a MAFT? Mass air flow tuner?
What's Atap? ??
<strong> I would at least get a MAFT and get a friend to help dial the car in with Atap.
Good Luck</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What's a MAFT? Mass air flow tuner?
What's Atap? ??
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From: Tacoma, WA
Re: dyno results suck MAFT= mass air flow translator
A-tap= a computer tool to read all the curent readings of your computer. like air fuel, o2's, idle settings etc's. it is a diagnostic tool. but you can't adjust anything with it. you need ls1 edit or the diablo to change anything.
A-tap= a computer tool to read all the curent readings of your computer. like air fuel, o2's, idle settings etc's. it is a diagnostic tool. but you can't adjust anything with it. you need ls1 edit or the diablo to change anything.
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From: McChord AFB WA
Re: dyno results suck Jeff, get that LS6 Intake and better Y-pipe or X-pipe and your there <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John, thanks for running Atap on my car and for all of your help getting my car to where it is today <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
When I come back from my trip I'm installing a ASP pulley, Shanner TB, HPPIII to raise limiter then I should dyno 390+RWHP. Then shortly thereafter, it's time for MTI heads, rearend and gears <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" />
See you guys next year, take care <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Nathan
<small>[ November 18, 2002, 03:02 AM: Message edited by: '01WS6/'99SS ]</small>
John, thanks for running Atap on my car and for all of your help getting my car to where it is today <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
When I come back from my trip I'm installing a ASP pulley, Shanner TB, HPPIII to raise limiter then I should dyno 390+RWHP. Then shortly thereafter, it's time for MTI heads, rearend and gears <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" />
See you guys next year, take care <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Nathan
<small>[ November 18, 2002, 03:02 AM: Message edited by: '01WS6/'99SS ]</small>
Joined: Dec 2001
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From: Central Indiana Honors: 4th grade spelling bee contestant
Re: dyno results suck Some modifications due more harm than good in my opinion. You sometimes need the right combination of parts to see any gains.
Re: dyno results suck </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by y2k_ta:
<strong>Some modifications due more harm than good in my opinion. You sometimes need the right combination of parts to see any gains.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">This is true!!! My '02 WS6, with just a lid and muffler, dyno'd at 335rwhp/353rwtq... I figured I will research for the right combo's that people are getting positive results from, then work that way. I'd like to get around 375rwhp/400rwtq without breaking any seals (other than exhaust gaskets) <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<strong>Some modifications due more harm than good in my opinion. You sometimes need the right combination of parts to see any gains.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">This is true!!! My '02 WS6, with just a lid and muffler, dyno'd at 335rwhp/353rwtq... I figured I will research for the right combo's that people are getting positive results from, then work that way. I'd like to get around 375rwhp/400rwtq without breaking any seals (other than exhaust gaskets) <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />