ASP Pulleys are Awesome
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On The Tree
Joined: Nov 2001
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From: Charlotte, NC
Re: ASP Pulleys are Awesome [quote]Originally posted by YOOFORMULA:
<strong>Chuck, I autotapped before and after and there is definetly a change. I hit the rev limiter, while the tach showed only 5500rpms. I am guessing less rotating mass might be the reason, but I'll know for sure when I install the new tach I just ordered.</strong><hr></blockquote>
Wow, that would stink if the pulleys short change you in the rpms. That would be losing way more than your gains just in rpms..
So I guess this means the ECM and the tach are polling from 2 seperate locations? That seems kinda odd, but these days I wouldn't put anything past GM.
Kick_*ss's has apparently gone in the other direction as far as he feels, He said it sounds like it is at 6k+rpms when his tach shows 51-5200.
I guess we will not know for sure until he gets it over here, I am hoping it is just a change in SOTP that has got him worried...
Chuck
<strong>Chuck, I autotapped before and after and there is definetly a change. I hit the rev limiter, while the tach showed only 5500rpms. I am guessing less rotating mass might be the reason, but I'll know for sure when I install the new tach I just ordered.</strong><hr></blockquote>
Wow, that would stink if the pulleys short change you in the rpms. That would be losing way more than your gains just in rpms..
So I guess this means the ECM and the tach are polling from 2 seperate locations? That seems kinda odd, but these days I wouldn't put anything past GM.
Kick_*ss's has apparently gone in the other direction as far as he feels, He said it sounds like it is at 6k+rpms when his tach shows 51-5200.
I guess we will not know for sure until he gets it over here, I am hoping it is just a change in SOTP that has got him worried...
Chuck
Re: ASP Pulleys are Awesome hey chuck, i helped yooformula put in the cam and the pulley. his is doing the same thing your buds is doing, sounds really high and the tach shows it really low. does your buddie's hit the rev limiter?
Chris
Chris
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On The Tree
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From: Charlotte, NC
Re: ASP Pulleys are Awesome [quote]Originally posted by z28kid98:
<strong>hey chuck, i helped yooformula put in the cam and the pulley. his is doing the same thing your buds is doing, sounds really high and the tach shows it really low. does your buddie's hit the rev limiter?
Chris</strong><hr></blockquote>
I think he is a little afraid to push it much farther, I will take it for a spin tomorrow and see if I can get it to bang the limiter at a lower rpm..
Sounds like we have hit on something funny here..
hopefully it is easy to fix..
Do you know if the ls1 has a sensor or something at the front of the crank that we are pulling RPMs from? I haven't had the chance to pull a timing cover off of one of these things yet so don't know.
Chuck
<strong>hey chuck, i helped yooformula put in the cam and the pulley. his is doing the same thing your buds is doing, sounds really high and the tach shows it really low. does your buddie's hit the rev limiter?
Chris</strong><hr></blockquote>
I think he is a little afraid to push it much farther, I will take it for a spin tomorrow and see if I can get it to bang the limiter at a lower rpm..
Sounds like we have hit on something funny here..
hopefully it is easy to fix..
Do you know if the ls1 has a sensor or something at the front of the crank that we are pulling RPMs from? I haven't had the chance to pull a timing cover off of one of these things yet so don't know.
Chuck
Re: ASP Pulleys are Awesome I am very happy with the ASP pulley set.
Like lunaticTA said above, I am stomping it and at around 4k-5k it sounds like it did at 6k before but still keeps going to 6k.
I haven't hit the rev limiter yet, but after IM'ing lunaticTA I will purposely hit it tomorrow morning after it warms up on the way into work.
But truthfully after the last dyno runs I've had, my power always started to dropped off at 5200-5500 anyway, so now I have even more reason to shift at that range.
Letcha know tomorrow.
PS. first post on this board <img src="images/icons/grin.gif" border="0">
Like lunaticTA said above, I am stomping it and at around 4k-5k it sounds like it did at 6k before but still keeps going to 6k.
I haven't hit the rev limiter yet, but after IM'ing lunaticTA I will purposely hit it tomorrow morning after it warms up on the way into work.
But truthfully after the last dyno runs I've had, my power always started to dropped off at 5200-5500 anyway, so now I have even more reason to shift at that range.
Letcha know tomorrow.
PS. first post on this board <img src="images/icons/grin.gif" border="0">
Re: ASP Pulleys are Awesome About the tach issue. The only reason why its like that is because the tach cannot keep up with a fast revving engine. Mine couldnt keep up when the car was stock. Its bad now in first with the pulley and 4.10s. Get a shift light.
Also, to the above post, with your mods, you should be shifting as close to the rev limiter as possible for the best ET. Yes, your hp peaks lower than 6200, but its been long proven this is the way to do it...unless you are running N2O.
Brad
Also, to the above post, with your mods, you should be shifting as close to the rev limiter as possible for the best ET. Yes, your hp peaks lower than 6200, but its been long proven this is the way to do it...unless you are running N2O.
Brad
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Joined: Nov 2001
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From: Chicago (Elgin), IL
Re: ASP Pulleys are Awesome My tach has been off long before I even started modding the car. <img src="images/icons/grin.gif" border="0">
One of the reasons to hold out and shift just before redline is so that when you hit the next gear, you are in the meat of your power range. It takes less time to rev the engine from around 5500rpm where your peak power is made to 6200rpm than it is to drop it to low and re-spool the engine in the next gear.
One of the reasons to hold out and shift just before redline is so that when you hit the next gear, you are in the meat of your power range. It takes less time to rev the engine from around 5500rpm where your peak power is made to 6200rpm than it is to drop it to low and re-spool the engine in the next gear.
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Re: ASP Pulleys are Awesome I like the gains from the pulley don't get me wrong, I like how fast engine revs, plus with the new cam it just keeps on pulling! <img src="images/icons/grin.gif" border="0"> I just needed to know if its a common occurance for the stock tach to become slow after the install.. My factory tach was fine before the install, then afterwards it seems like its just way off. I ordered a new tach w/shift light so no big deal, but I thought it was just me or maybe we did something wrong.
On The Tree
Joined: Nov 2001
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Re: ASP Pulleys are Awesome TTT Anyone else with ASP pulleys notice a difference on the tachometer?
[quote]Originally posted by LunaticTA:
<strong>
I think he is a little afraid to push it much farther, I will take it for a spin tomorrow and see if I can get it to bang the limiter at a lower rpm..
Sounds like we have hit on something funny here..
hopefully it is easy to fix..
Do you know if the ls1 has a sensor or something at the front of the crank that we are pulling RPMs from? I haven't had the chance to pull a timing cover off of one of these things yet so don't know.
Chuck</strong><hr></blockquote>
[quote]Originally posted by LunaticTA:
<strong>
I think he is a little afraid to push it much farther, I will take it for a spin tomorrow and see if I can get it to bang the limiter at a lower rpm..
Sounds like we have hit on something funny here..
hopefully it is easy to fix..
Do you know if the ls1 has a sensor or something at the front of the crank that we are pulling RPMs from? I haven't had the chance to pull a timing cover off of one of these things yet so don't know.
Chuck</strong><hr></blockquote>
Re: ASP Pulleys are Awesome [quote]Originally posted by 02 'Hawk:
<strong>you could do what I did, and **** people off in the process <img src="images/icons/smile.gif" border="0">
i posted in the gp section and asked, who's got an ASP pulley set for me? bought it the next business day. done. no shopping/waiting/bitching, etc.</strong><hr></blockquote>
I did the same thing <img src="gr_stretch.gif" border="0"> I had mine from www.ls1speed.com 4 days after I posted.
<strong>you could do what I did, and **** people off in the process <img src="images/icons/smile.gif" border="0">
i posted in the gp section and asked, who's got an ASP pulley set for me? bought it the next business day. done. no shopping/waiting/bitching, etc.</strong><hr></blockquote>
I did the same thing <img src="gr_stretch.gif" border="0"> I had mine from www.ls1speed.com 4 days after I posted.
TECH Junkie
Joined: Nov 2001
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From: Los Angeles
Re: ASP Pulleys are Awesome There is no sensor that reads the crank pulley for rpms. If anything, because its revving faster it looks like you are hitting the limiter quicker...the stock tach is lagged and probably cant keep up as well.
Staging Lane
Joined: Dec 2001
Posts: 78
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From: SW Florida
Re: ASP Pulleys are Awesome Don't forget guys that our tachs are notoriously slow to begin with so if you are twisting up that much faster you would be having this problem. Take your rpms up and hold them and see if the tach catches up, that is the easiest way to tell if your tach is slow.
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From: Auburn, AL
Re: ASP Pulleys are Awesome So, once I install mine in a A4, it isn't gonna make a difference in performance if the tach can't keep up is it? The computer will shift at the same RPM whether the tach keeps up or not, correct?
Re: ASP Pulleys are Awesome [quote]Originally posted by quickWS6:
<strong>So, once I install mine in a A4, it isn't gonna make a difference in performance if the tach can't keep up is it? The computer will shift at the same RPM whether the tach keeps up or not, correct?</strong><hr></blockquote>
The tach has nothing to do with the computer. Finally got my ASP on this morning (sweet). I have a Phantom tach, and it's always been way faster than the factory one. Although I did verify on atap that the factory tach is right on, and the Autometer is actually the one 200 rpm's off <img src="gr_sad.gif" border="0"> The only reason I don't sell it is because it looks cool. After my pulley the tach readings are the same, and the same speed as before. BTW, the pulley makes my car go like:
<img src="graemlins/formula.gif" border="0" alt="[Pontiac]" />
<strong>So, once I install mine in a A4, it isn't gonna make a difference in performance if the tach can't keep up is it? The computer will shift at the same RPM whether the tach keeps up or not, correct?</strong><hr></blockquote>
The tach has nothing to do with the computer. Finally got my ASP on this morning (sweet). I have a Phantom tach, and it's always been way faster than the factory one. Although I did verify on atap that the factory tach is right on, and the Autometer is actually the one 200 rpm's off <img src="gr_sad.gif" border="0"> The only reason I don't sell it is because it looks cool. After my pulley the tach readings are the same, and the same speed as before. BTW, the pulley makes my car go like:
<img src="graemlins/formula.gif" border="0" alt="[Pontiac]" />
