Gauging interest - SLP 52mm throttle body
06-30-2020, 03:38 PM
#1
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Gauging interest - SLP 52mm throttle body
I just bought a BBK 58mm from another member and will probably be getting rid of the 52mm.
I got it back in the mid-90's when SLP was taking factory 48mm and boring them out 52mm.
It has the early style throttle arm (85-88).
Full disclosure...
1.) As expected the throttle shaft has a little play in it side to side after ~25 years of use. Since my car is speed density, whatever air might be leaking through there just becomes part of the overall quantity of idle air going into the engine. IAC simply compensates by reducing the step count in order to maintain the proper idle speed (MAP cars don't measure airflow directly). On a MAF car, this may be a problem since un-accounted for air is getting in after the MAF sensor and could result in fueling issues.
2.) Despite the throttle shaft being a little worn, it still works smoothly in terms of how the accelerator feels under your foot. I actually didn't even realize it was worn until about a year ago when I was moving the linkage by hand and noticed it.
3.) One of the TPS mounting screws broke down in the hole. There's enough thread remaining above the broken part of the screw that I can get a screw in and tighten it enough to retain the TPS sensor. However, I can easily repair this by drilling it out and repairing with a heli-coil insert before shipping it.
Edit=> In fact I'll just helicoil both holes for good measure. It'll be stronger than stock and gauranty the user no problems later with stripped threads.
4.) It would come less the IAC motor and TPS sensor. I'm probably also going to swap my existing blank cover over to the 58mm, so I'll include the BBK cover with it. I lost track of my original SLP cover.
It's on the car at the moment, so I can post pictures of it after I do the swap.
Given the issues with it, I'd be willing to let it go for $120 (less shipping). That'll allow the buyer (if desired) to get a throttle shaft repair kit and spend about the same amount overall as if buying a used one in better condition.
For $140, I'll include the TPI airfoil in it (less shipping).
I got it back in the mid-90's when SLP was taking factory 48mm and boring them out 52mm.
It has the early style throttle arm (85-88).
Full disclosure...
1.) As expected the throttle shaft has a little play in it side to side after ~25 years of use. Since my car is speed density, whatever air might be leaking through there just becomes part of the overall quantity of idle air going into the engine. IAC simply compensates by reducing the step count in order to maintain the proper idle speed (MAP cars don't measure airflow directly). On a MAF car, this may be a problem since un-accounted for air is getting in after the MAF sensor and could result in fueling issues.
2.) Despite the throttle shaft being a little worn, it still works smoothly in terms of how the accelerator feels under your foot. I actually didn't even realize it was worn until about a year ago when I was moving the linkage by hand and noticed it.
3.) One of the TPS mounting screws broke down in the hole. There's enough thread remaining above the broken part of the screw that I can get a screw in and tighten it enough to retain the TPS sensor. However, I can easily repair this by drilling it out and repairing with a heli-coil insert before shipping it.
Edit=> In fact I'll just helicoil both holes for good measure. It'll be stronger than stock and gauranty the user no problems later with stripped threads.
4.) It would come less the IAC motor and TPS sensor. I'm probably also going to swap my existing blank cover over to the 58mm, so I'll include the BBK cover with it. I lost track of my original SLP cover.
It's on the car at the moment, so I can post pictures of it after I do the swap.
Given the issues with it, I'd be willing to let it go for $120 (less shipping). That'll allow the buyer (if desired) to get a throttle shaft repair kit and spend about the same amount overall as if buying a used one in better condition.
For $140, I'll include the TPI airfoil in it (less shipping).
Last edited by ULTM8Z; 06-30-2020 at 03:46 PM.
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TTOP350 (07-13-2020)
07-02-2020, 11:52 PM
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Re: Gauging interest - SLP 52mm throttle body
Got pictures of it?
Never mind don't know how to read lol. So it's essentially a stock throttle body that they opened up to 52mm?
Never mind don't know how to read lol. So it's essentially a stock throttle body that they opened up to 52mm?
07-03-2020, 07:35 AM
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07-12-2020, 11:24 PM
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