SLP LT GIVE ME NO GAIN ?
SLP LT GIVE ME NO GAIN ? My prev. best was 12.9 @ 109 w/ 2.0 60' went and ran it after the Header install and could only run consistant13.0x-13.1x with the same mph and also the same 60's. Could i be running to rich or to lean. I did notice up top(around5200-6000rpm) i thought i felt a small vibration in the motor. Could this be bent pushrods. I've heard some good things about LT's especially when i put the new cam in next week but this is disappointing to spend that kind of money and gain E.T? When i have the cam installed i'm also having the car Dyno-Tunned will this find/cure my lost power? Any feed back is TRULY APPRECIATED.
Re: SLP LT GIVE ME NO GAIN ? Sometimes its tough to measure gains by track time alone, especially if you're a six speed. Weather plays a large role in your car's e.t.'s so check out the conditions pre and post header install.
Good luck.
Good luck.
Re: SLP LT GIVE ME NO GAIN ? I think most of the time LT cause cars to run richer. Need to ATap based on what I've been told and see if the car is lean or rich and tune according with a MAFT or LS1 edit.
Did you try the car at the track with and without the HPP3 tuning?
Also vibrations or banging are not good, might cause knock retard which could reduce power.
<small>[ July 07, 2002, 10:38 AM: Message edited by: 99 Black Bird T/A ]</small>
Did you try the car at the track with and without the HPP3 tuning?
Also vibrations or banging are not good, might cause knock retard which could reduce power.
<small>[ July 07, 2002, 10:38 AM: Message edited by: 99 Black Bird T/A ]</small>
TECH Resident
Joined: Mar 2002
Posts: 770
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From: WA
Re: SLP LT GIVE ME NO GAIN ? Try getting rid of those crappy SLP long tubes.
I just talked with a guy that only saw 1 Phuckin RWHP gain. Amazingly. the torq gain was 3x that. 3RWTQ! WOW that awsome!!!!
The shity thing about SLP. Some people make power, some don't. <That sucks.
SLP claims to have one of the first LT tuned header. It shows. They came out with that header design years ago. They haven't improved it yet. And they won't as long as people still buy it. Nothing is at it's best the first time out. Do you ever wonder if all those crazy bends make a differance? Mac's, TTS, Grotyohann, FLP, Bassani, and Hooker. All make their headers considerably straiter. Check out some pics on the web and compare. Volocity is lost through turns and bends. Straiter is better. Think about it.....
I just talked with a guy that only saw 1 Phuckin RWHP gain. Amazingly. the torq gain was 3x that. 3RWTQ! WOW that awsome!!!!
The shity thing about SLP. Some people make power, some don't. <That sucks.
SLP claims to have one of the first LT tuned header. It shows. They came out with that header design years ago. They haven't improved it yet. And they won't as long as people still buy it. Nothing is at it's best the first time out. Do you ever wonder if all those crazy bends make a differance? Mac's, TTS, Grotyohann, FLP, Bassani, and Hooker. All make their headers considerably straiter. Check out some pics on the web and compare. Volocity is lost through turns and bends. Straiter is better. Think about it.....
Re: SLP LT GIVE ME NO GAIN ? my slp's work great. not only do i have gobs more low end torque, but at wot, i can definitely tell i gained power...vibrations are bad for the motor from what ive heard...may cause knock retard, but maybe im wrong??? also the conditions may have been a lot worse when u raced w/ your longtubes.
Trending Topics
TECH Enthusiast
Joined: Nov 2001
Posts: 712
Likes: 1
From: Dallas,Texas
Re: SLP LT GIVE ME NO GAIN ? With hotcam+lid+catback ( stock manifold and cats)
330/330
added SLP LT's kit.. ( cats and y-pipe )
351/364
This setup has worked great for me.. car made a
2000 mile vacation trip.. ran great.. !
330/330
added SLP LT's kit.. ( cats and y-pipe )
351/364
This setup has worked great for me.. car made a
2000 mile vacation trip.. ran great.. !
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From: Maryland
Re: SLP LT GIVE ME NO GAIN ? Bad02WS6 - are you talking from hearsay or experience? The former, I think. I had SLP's and switched to Grotts. No gain. And, FWIW, the fit and y-pipe of the SLP's blow most of the others away, including the Grotts. I would own the SLP's again in a heartbeat. These were headers that delivered good power WITHOUT the hassles of some other designs.
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Joined: Nov 2001
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From: San Diego, Ca / Tucson,AZ
Re: SLP LT GIVE ME NO GAIN ? I too have SLP LT on my car and Ive had them for a while. I've also made several long road trips. Once to Phoenix the other to El Paso. I havent dyno'd my car but I could tell a difference after getting them. Mostly I feel the difference at highway speeds (Mid range).
I'm going to have a cam installed prety soon so I'll be taking my car to get dyno'd before and after so I'll actually know how much power Im gaining with the cam.
I'm going to have a cam installed prety soon so I'll be taking my car to get dyno'd before and after so I'll actually know how much power Im gaining with the cam.
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Joined: Feb 2002
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From: Brook Park, Ohio
Re: SLP LT GIVE ME NO GAIN ? Moz,
I ran 13.60 @ 104.80 mph (2.29 60'). After I installed a lid, filter, SLP LT's, Y-pipe, and cats I ran 13.48 @ 106.40 mph. Then I bought Autotap and a MAFT. It turns out I was running rich. I recently tuned the car with the MAFT and checked it with an air/fuel meter. The car seems to run a little stronger now, but I haven't been back to the track to prove it. I know I'm not the best driver (60' are bad)so these numbers may be deceiving, but overall I am a little disappointed. Hope that helps, for whatever it's worth.
I've been thinking about going to 4.10's. How do you like them? What E.T. and mph gains did you see? and do you have a 12 bolt?
Thanks
I ran 13.60 @ 104.80 mph (2.29 60'). After I installed a lid, filter, SLP LT's, Y-pipe, and cats I ran 13.48 @ 106.40 mph. Then I bought Autotap and a MAFT. It turns out I was running rich. I recently tuned the car with the MAFT and checked it with an air/fuel meter. The car seems to run a little stronger now, but I haven't been back to the track to prove it. I know I'm not the best driver (60' are bad)so these numbers may be deceiving, but overall I am a little disappointed. Hope that helps, for whatever it's worth.
I've been thinking about going to 4.10's. How do you like them? What E.T. and mph gains did you see? and do you have a 12 bolt?
Thanks
Re: SLP LT GIVE ME NO GAIN ? My first mod on the T.A was the gears and they are great but have no time slips before the 4:10s.I do not have a 12 bolt buti did dyno today and the numbers tell a different story on the LT's. Check out my post in the internal engine section (Heres some numbers guys tell me what you think.)
Re: SLP LT GIVE ME NO GAIN ? My stock dyno was like 307 RWHP and 317 RWTQ and with a lid, filter, ported TB, the SLP LTs, no cats and the Loudmouth, I dynoed 350 RWHP and 360 RWTQ. Thats basically all the boltons I have for HP performance on the dyno. I also had to do some SERIOUS tuning with the MAFT.
They work...
<small>[ July 08, 2002, 07:49 PM: Message edited by: Country Boy ]</small>
They work...
<small>[ July 08, 2002, 07:49 PM: Message edited by: Country Boy ]</small>
Staging Lane
Joined: Nov 2001
Posts: 97
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From: Ottawa, Canada
Re: SLP LT GIVE ME NO GAIN ? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Bad02WS6:
<strong>ONYXSS
If you think the SLPs are so much better than the Grotyohanns. Why don't you switch back to SLPs?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">he didn't say they performed better than the Grotts. He said the Grotts didn't perform any better than the SLP's. So if they perform the same, there's no sense switching back. Too much hassle.
maybe he sold the SLP's already ??
<strong>ONYXSS
If you think the SLPs are so much better than the Grotyohanns. Why don't you switch back to SLPs?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">he didn't say they performed better than the Grotts. He said the Grotts didn't perform any better than the SLP's. So if they perform the same, there's no sense switching back. Too much hassle.
maybe he sold the SLP's already ??
Staging Lane
Joined: Jul 2002
Posts: 69
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From: El Paso
Re: SLP LT GIVE ME NO GAIN ? I just installed a set of SLP LT's and noticed an immediate difference in performance. I notice a power gain in every gear. I have not dynoed again yet, but I am sure of at least 20rwhp.
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From: Maryland
Re: SLP LT GIVE ME NO GAIN ? rick, yes, I sold them when I bought the Grotts. And you are correct about what I'm trying to say. With no measurable difference, why switch back even if I still had the SLP's?
I actually like the looks of the Grotts better. They are beautiful headers. But to sell them with a ghetto ypipe is inexcuseable, IMO. So I will be going with a custom y........money I shouldn't have to spend. I may actually buy the SLP y and have it fitted.
I actually like the looks of the Grotts better. They are beautiful headers. But to sell them with a ghetto ypipe is inexcuseable, IMO. So I will be going with a custom y........money I shouldn't have to spend. I may actually buy the SLP y and have it fitted.
Re: SLP LT GIVE ME NO GAIN ? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Moz:
<strong>My first mod on the T.A was the gears and they are great but have no time slips before the 4:10s.I do not have a 12 bolt buti did dyno today and the numbers tell a different story on the LT's. Check out my post in the internal engine section (Heres some numbers guys tell me what you think.)</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I saw the numbers, and they look good, especially through a set of gears. According to your A/F though, it looks like you could use some tuning, as you had mentioned.
As for your track times.... I can say that the summer heat and humidity absolutely kills mine. For my setup that runs very strong on a good day, it will have KR problems that just kill the HP on a hot humid one. I have yet to run lap times to compare, but I'm sure I would be dissappointed.
Anyways, congrats on the new headers (SLP's are just fine) and good luck with the tune. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<strong>My first mod on the T.A was the gears and they are great but have no time slips before the 4:10s.I do not have a 12 bolt buti did dyno today and the numbers tell a different story on the LT's. Check out my post in the internal engine section (Heres some numbers guys tell me what you think.)</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I saw the numbers, and they look good, especially through a set of gears. According to your A/F though, it looks like you could use some tuning, as you had mentioned.
As for your track times.... I can say that the summer heat and humidity absolutely kills mine. For my setup that runs very strong on a good day, it will have KR problems that just kill the HP on a hot humid one. I have yet to run lap times to compare, but I'm sure I would be dissappointed.
Anyways, congrats on the new headers (SLP's are just fine) and good luck with the tune. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />