Throttle Body Bump Stop Mod ???
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From: Earth
Re: Throttle Body Bump Stop Mod ??? I believe it can be adjusted at the "little black knuckle" in the middle of the throttle cable.
I've popped off the clip that covers the throttle cable, but I still don't see how to adjust it.
I've popped off the clip that covers the throttle cable, but I still don't see how to adjust it.
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From: Earth
Re: Throttle Body Bump Stop Mod ??? LOL! I got it. I put that little clip in my pocket. Little did I know that it was the key to holding the throttle cable!
ND4SPD:
Once again, thanks for your help brother. I really appreciate it.
Dan
ND4SPD:
Once again, thanks for your help brother. I really appreciate it.
Dan
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From: Earth
Re: Throttle Body Bump Stop Mod ??? Ken,
I took it for a spin after finishing the mod. It felt a little more responsive. It's hard to tell though. For some reason my car is faster on certain occasions: freshly washed & waxed, oil change, brake job, etc. Maybe it's just my heavy right foot! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I'll be going to the track Wednesday. I'll shoot you a pm to let you know the results.
Dan
I took it for a spin after finishing the mod. It felt a little more responsive. It's hard to tell though. For some reason my car is faster on certain occasions: freshly washed & waxed, oil change, brake job, etc. Maybe it's just my heavy right foot! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I'll be going to the track Wednesday. I'll shoot you a pm to let you know the results.
Dan
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From: LaConner WA
Re: Throttle Body Bump Stop Mod ??? I just came across this thread and decided to just go check mine to see where it was at ..... it was 4.24v. I ground down the stop until I reached 4.63 and decided that was enough. I then had to completely reset my NOS throttle switch. That was probably the hardest part <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> Can anybody actually verify by dyno a hp gain to this mod ? I'm putting down 338 rwhp now and was wondering what this mod was actually worth .
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From: Canada
Re: Throttle Body Bump Stop Mod ??? Hey Dan!
I know it's difficult to notice such a small change but you just know that the air has got to be getting in more smoothly with the throttle blade at 90 degrees rather than bouncing off the blade set at 70 degrees WOT.
Make sure you give it a wash before going to the track so that layer of dust doesn't slow you up any. LMK how you make out!
Ken <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />
I know it's difficult to notice such a small change but you just know that the air has got to be getting in more smoothly with the throttle blade at 90 degrees rather than bouncing off the blade set at 70 degrees WOT.
Make sure you give it a wash before going to the track so that layer of dust doesn't slow you up any. LMK how you make out!
Ken <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />
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From: Canada
Re: Throttle Body Bump Stop Mod ??? You don't need a dyno! Just look at the difference between the throttleblade at 70deg. versus 90deg. @ WOT. With the mod, air doesn't have to hit such a large portion of the throttle plate so even if it is undetectable, it's gotta help.
Dan: LMK how you make out at the track!
Dan: LMK how you make out at the track!
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From: Earth
Re: Throttle Body Bump Stop Mod ??? I'll definitely let you know my track results. I'm really curious to see the difference. I'm hoping to drop from a 13.4 to a 13.29-13.35. I'd love to get up to about 107mph. My launch techniques are improving. That in combination with better air flow might put me there.
Dan
Dan
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Staging Lane
Joined: Jan 2002
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From: Michigan
Re: Throttle Body Bump Stop Mod ??? I hooked my scanner up to the car last night and found that my TPS voltage is 4.26 at WOT. The PCM was commanding 99% at 4.04 and 100% at 4.06
I verified the actual voltage at the sensor by back-probing the connector while I swept the throttle. The voltages agreed so I am going to do the bump stop mod based on my scanner readings (my scanner cartrige is only thru model year 2000)
I noticed that the throttle blade is at an angle when I installed the lid last week.
PS - If anyone is in the west Michigan area I could hook you up and help out
I verified the actual voltage at the sensor by back-probing the connector while I swept the throttle. The voltages agreed so I am going to do the bump stop mod based on my scanner readings (my scanner cartrige is only thru model year 2000)
I noticed that the throttle blade is at an angle when I installed the lid last week.
PS - If anyone is in the west Michigan area I could hook you up and help out
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From: SmartAss, Ca
Re: Throttle Body Bump Stop Mod ??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ND4SPD:
<strong>You do not have to have engine running, only ignition on so power is supplied to TPS.
Disconnect plug from TPS on opposite side of throttlebody. Pull back the rubber insulation so that you can place (3) small gauge wires in each of the (3) holes. Now you have to connect plug back to TPS but will have (3) wires sticking out. Turn on Ignition keeping wires separated (not touching one another). The 3 wires are for voltage, ground, and variable voltage. You need to hook the two voltmeter leads to two of the three wires. Hook one voltmeter lead to the blue (variable voltage) and the other lead to one of the other two wires. When you have this correct your voltmeter will vary from 0-5 volts when turning throttle blade manually. Now just grind stop and keep checking voltage with throttle held wide open to bumpstop until you reach desired voltage. I went 4.65vdc. Over 4.7 will set code so be conservative near the end. Mine went from about 78 deg. (4.41vdc) to about 90 deg. (4.65vdc) when done. If you have tcs you may have to adjust throttle cable length depending on how far you go with the bumpstop mod. I had to.
I hope this helps!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What is TPS <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
I may be looking at my TB wrong, but i have 2 plugs...which one do i connect those 3 wires to?
<strong>You do not have to have engine running, only ignition on so power is supplied to TPS.
Disconnect plug from TPS on opposite side of throttlebody. Pull back the rubber insulation so that you can place (3) small gauge wires in each of the (3) holes. Now you have to connect plug back to TPS but will have (3) wires sticking out. Turn on Ignition keeping wires separated (not touching one another). The 3 wires are for voltage, ground, and variable voltage. You need to hook the two voltmeter leads to two of the three wires. Hook one voltmeter lead to the blue (variable voltage) and the other lead to one of the other two wires. When you have this correct your voltmeter will vary from 0-5 volts when turning throttle blade manually. Now just grind stop and keep checking voltage with throttle held wide open to bumpstop until you reach desired voltage. I went 4.65vdc. Over 4.7 will set code so be conservative near the end. Mine went from about 78 deg. (4.41vdc) to about 90 deg. (4.65vdc) when done. If you have tcs you may have to adjust throttle cable length depending on how far you go with the bumpstop mod. I had to.
I hope this helps!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What is TPS <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
I may be looking at my TB wrong, but i have 2 plugs...which one do i connect those 3 wires to?
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From: Canada
Re: Throttle Body Bump Stop Mod ??? TPS= throttle position sensor.
It is connected to the throttle cable cam on the TB and is on the opposite side of the TB. There is only 1 plug on the TPS with three wires connected to it.
It is connected to the throttle cable cam on the TB and is on the opposite side of the TB. There is only 1 plug on the TPS with three wires connected to it.
Staging Lane
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From: Michigan
Re: Throttle Body Bump Stop Mod ??? Well I got out the Dremel last night and ground down the throttle stop. I stopped at 4.66.Volts.
After the mod I had to adjust the ASR to TB cable because I could only get up to 4.4x volts with the gas pedal at WOT. The POS ASR restricts total pedal travel to .49 volts to 4.59 volts. One notch either way on the cable adjustment moves me from having .51 with throttle closed and 4.66 WOT to .39 and 3.9x. At .51 the PCM thinks 2% throttle and at .49 it thinks 0% throttle. I had to sacrifice a little WOT to get 0% with throttle closed. Any insight ?
After the mod I had to adjust the ASR to TB cable because I could only get up to 4.4x volts with the gas pedal at WOT. The POS ASR restricts total pedal travel to .49 volts to 4.59 volts. One notch either way on the cable adjustment moves me from having .51 with throttle closed and 4.66 WOT to .39 and 3.9x. At .51 the PCM thinks 2% throttle and at .49 it thinks 0% throttle. I had to sacrifice a little WOT to get 0% with throttle closed. Any insight ?
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From: Canada
Re: Throttle Body Bump Stop Mod ??? Keep me posted Dan as I am really curious!
OvalHunter;
Are you sure you are adjusting the throttle cable correctly? I am able to adjust mine for full deflection in both directions and more if required. I never checked the volts after cable adjust but can gaurantee it hits the stop in both directions. My closed throttle voltage should remain unchanged and my WOT voltage is presently @ 4.65vdc.
LMK
OvalHunter;
Are you sure you are adjusting the throttle cable correctly? I am able to adjust mine for full deflection in both directions and more if required. I never checked the volts after cable adjust but can gaurantee it hits the stop in both directions. My closed throttle voltage should remain unchanged and my WOT voltage is presently @ 4.65vdc.
LMK
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From: Earth
Re: Throttle Body Bump Stop Mod ??? My WOT voltage bounces from 4.63-4.66vdc. I guess my gauge is a little inaccurate. It's definitely WOT now. That's all I care about.
I can't wait for dry weather and cold air!
I can't wait for dry weather and cold air!
Re: Throttle Body Bump Stop Mod ??? I read there are two different sizes of
TB pulley out there. If you got a smaller
diameter TB pulley, then you'd have more
blade angle deflection per travel of cable.
If the travel range of the TCS is what's
binding you up, then this is the way to go.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by OvalHunter:
<strong>Well I got out the Dremel last night and ground down the throttle stop. I stopped at 4.66.Volts.
After the mod I had to adjust the ASR to TB cable because I could only get up to 4.4x volts with the gas pedal at WOT. The POS ASR restricts total pedal travel to .49 volts to 4.59 volts. One notch either way on the cable adjustment moves me from having .51 with throttle closed and 4.66 WOT to .39 and 3.9x. At .51 the PCM thinks 2% throttle and at .49 it thinks 0% throttle. I had to sacrifice a little WOT to get 0% with throttle closed. Any insight ?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
TB pulley out there. If you got a smaller
diameter TB pulley, then you'd have more
blade angle deflection per travel of cable.
If the travel range of the TCS is what's
binding you up, then this is the way to go.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by OvalHunter:
<strong>Well I got out the Dremel last night and ground down the throttle stop. I stopped at 4.66.Volts.
After the mod I had to adjust the ASR to TB cable because I could only get up to 4.4x volts with the gas pedal at WOT. The POS ASR restricts total pedal travel to .49 volts to 4.59 volts. One notch either way on the cable adjustment moves me from having .51 with throttle closed and 4.66 WOT to .39 and 3.9x. At .51 the PCM thinks 2% throttle and at .49 it thinks 0% throttle. I had to sacrifice a little WOT to get 0% with throttle closed. Any insight ?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
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From: Earth
Re: Throttle Body Bump Stop Mod ??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by jimmyblue:
<strong>I read there are two different sizes of
TB pulley out there. If you got a smaller
diameter TB pulley, then you'd have more
blade angle deflection per travel of cable.
If the travel range of the TCS is what's
binding you up, then this is the way to go.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by OvalHunter:
<strong>Well I got out the Dremel last night and ground down the throttle stop. I stopped at 4.66.Volts.
After the mod I had to adjust the ASR to TB cable because I could only get up to 4.4x volts with the gas pedal at WOT. The POS ASR restricts total pedal travel to .49 volts to 4.59 volts. One notch either way on the cable adjustment moves me from having .51 with throttle closed and 4.66 WOT to .39 and 3.9x. At .51 the PCM thinks 2% throttle and at .49 it thinks 0% throttle. I had to sacrifice a little WOT to get 0% with throttle closed. Any insight ?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"></strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Throttle body pulley? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Are you refering to the throttle cable?
<strong>I read there are two different sizes of
TB pulley out there. If you got a smaller
diameter TB pulley, then you'd have more
blade angle deflection per travel of cable.
If the travel range of the TCS is what's
binding you up, then this is the way to go.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by OvalHunter:
<strong>Well I got out the Dremel last night and ground down the throttle stop. I stopped at 4.66.Volts.
After the mod I had to adjust the ASR to TB cable because I could only get up to 4.4x volts with the gas pedal at WOT. The POS ASR restricts total pedal travel to .49 volts to 4.59 volts. One notch either way on the cable adjustment moves me from having .51 with throttle closed and 4.66 WOT to .39 and 3.9x. At .51 the PCM thinks 2% throttle and at .49 it thinks 0% throttle. I had to sacrifice a little WOT to get 0% with throttle closed. Any insight ?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"></strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Throttle body pulley? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Are you refering to the throttle cable?