82mm TB Question
05-01-2009, 09:29 AM
#1
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82mm TB Question
Does anyone know what Renntech does with the y-pipe when they do the 82mm throttle body upgrade? I recently did an 82mm tb upgrade on my car but it required a whole new intake setup and some custom work. If they reuse the stock y-pipe and airboxes that would be a pretty big restriction. I think I can make a "kit" for the 82mm tb upgrade for the 55k motors with a decent price once I find out what to do with the y-pipe section.
Edit: my setup is much different and more difficult than the 55k to work with in terms of TB placement and piping (I also have a MAF sensor but the 55k does not). TB on a 55k looks like it would be a breeze and I definitely plan on trying it on some local cars with before/after dynos.
Edit: my setup is much different and more difficult than the 55k to work with in terms of TB placement and piping (I also have a MAF sensor but the 55k does not). TB on a 55k looks like it would be a breeze and I definitely plan on trying it on some local cars with before/after dynos.
Last edited by blackbenzz; 05-01-2009 at 09:31 AM.
05-01-2009, 09:44 AM
#2
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Does anyone know what Renntech does with the y-pipe when they do the 82mm throttle body upgrade? I recently did an 82mm tb upgrade on my car but it required a whole new intake setup and some custom work. If they reuse the stock y-pipe and airboxes that would be a pretty big restriction. I think I can make a "kit" for the 82mm tb upgrade for the 55k motors with a decent price once I find out what to do with the y-pipe section.
Edit: my setup is much different and more difficult than the 55k to work with in terms of TB placement and piping (I also have a MAF sensor but the 55k does not). TB on a 55k looks like it would be a breeze and I definitely plan on trying it on some local cars with before/after dynos.
Edit: my setup is much different and more difficult than the 55k to work with in terms of TB placement and piping (I also have a MAF sensor but the 55k does not). TB on a 55k looks like it would be a breeze and I definitely plan on trying it on some local cars with before/after dynos.
Also you have to understand the Y pipe has two pipes going into the TB
Those two flowing together might provide enough flow for the 82mm tb
Although I have not ran any tests to confirm this, but just speculating, could be wrong
05-01-2009, 10:00 AM
#3
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They just re-use 80mm y pipe. Which sounds strange I know, but its cheaper
Also you have to understand the Y pipe has two pipes going into the TB
Those two flowing together might provide enough flow for the 82mm tb
Although I have not ran any tests to confirm this, but just speculating, could be wrong
Also you have to understand the Y pipe has two pipes going into the TB
Those two flowing together might provide enough flow for the 82mm tb
Although I have not ran any tests to confirm this, but just speculating, could be wrong
Last edited by blackbenzz; 05-01-2009 at 10:03 AM.
05-01-2009, 10:51 AM
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Whatever we're tuning!
Wow really? The inside diameter of the 80mm y pipe is much smaller than 80mm. It doesn't matter how big the 2 pipes flowing into the y are if the outlet of the y is small. This is definitely a restriction point but so is the rest of the airbox, especially the inlets at the front of the car. I completely got rid of my 55k airbox and y-pipe. I now just run 85mm piping from the TB all the way to one side of the car with a cone filter and have a hole in the headlight with a silicone hose through it directing air to the cone giving it "cold" air. But that is not for everyone since it doesn't look OEM at all lol. How much does Renntech charge for their TB kit? There is a local SL55 that I will probably put a 82mm TB on, maybe the VRP airbox can fit a 82mm TB?
As you are aware of the largest restriction will ultimately be the size of the throttle body and with your set up I would not be too concerned about not getting enough air for your BEAST!
The housing for the throttle body could be machined/ported slightly without breaching the integrity of it.
I know if you put your mind to it you will make it happen!
I agree with Zod on the speculation part(no concrete testing to back up our beliefs) but you know the way I think to Ahmad.
05-01-2009, 10:54 AM
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Ahmad-
As you are aware of the largest restriction will ultimately be the size of the throttle body and with your set up I would not be too concerned about not getting enough air for your BEAST!
The housing for the throttle body could be machined/ported slightly without breaching the integrity of it.
I know if you put your mind to it you will make it happen!
I agree with Zod on the speculation part(no concrete testing to back up our beliefs) but you know the way I think to Ahmad.
As you are aware of the largest restriction will ultimately be the size of the throttle body and with your set up I would not be too concerned about not getting enough air for your BEAST!
The housing for the throttle body could be machined/ported slightly without breaching the integrity of it.
I know if you put your mind to it you will make it happen!
I agree with Zod on the speculation part(no concrete testing to back up our beliefs) but you know the way I think to Ahmad.
I am trying to put it on a 55k car now 
And yea, I will git er done fer sure! lol
05-01-2009, 11:32 AM
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Whatever we're tuning!
You looking to go 9's that day or what?
That would be worth the 300 mile trip!
Did you get LET re-tune it yet? That thang is NASTY!!!!
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05-01-2009, 12:59 PM
#9
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Nah, no 9's for me. I did get LET to retune but my injectors are now maxed out up top (found out after tuning, so theres more power left on the table right now) so I bought some SLR injectors and trying to get them flow tested soon. Then I have to wait til LET come sback into town to retune.
Of what? When the TB is installed on my car you can't even see it. It is tucked under the supercharger. It is different than the factory 55k cars. I will take plenty of pics when we are doing the first 55k car. There is a BIG difference between stock and the 82mm. I dont understand what the eyerolling is for. Do you think I'm lying?
Last edited by blackbenzz; 05-01-2009 at 01:02 PM.
05-01-2009, 01:24 PM
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Whatever we're tuning!
Cool!
Nah, no 9's for me. I did get LET to retune but my injectors are now maxed out up top (found out after tuning, so theres more power left on the table right now) so I bought some SLR injectors and trying to get them flow tested soon. Then I have to wait til LET come sback into town to retune.
Nah, no 9's for me. I did get LET to retune but my injectors are now maxed out up top (found out after tuning, so theres more power left on the table right now) so I bought some SLR injectors and trying to get them flow tested soon. Then I have to wait til LET come sback into town to retune.
What lb injector were you running when they were maxed?
Are they typical Bosch/Bosch style injectors?
I'll try a get you some info if you can answer the above questions.
They were maxed out off the bottle right? That wouldn't be a pretty sight on the bottle.
What about a fuel pressure regulator or a boost-a-pump?(unless you already have it)
05-01-2009, 01:34 PM
#11
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Duty cycle shouldn't be more than 80-85% so I guess you were hitting 100% with the other injectors.
What lb injector were you running when they were maxed?
Are they typical Bosch/Bosch style injectors?
I'll try a get you some info if you can answer the above questions.
They were maxed out off the bottle right? That wouldn't be a pretty sight on the bottle.
What about a fuel pressure regulator or a boost-a-pump?(unless you already have it)
What lb injector were you running when they were maxed?
Are they typical Bosch/Bosch style injectors?
I'll try a get you some info if you can answer the above questions.
They were maxed out off the bottle right? That wouldn't be a pretty sight on the bottle.
What about a fuel pressure regulator or a boost-a-pump?(unless you already have it)
I dont know what pound injectors they are but they are the stock Bosch injectors for CLK55 p/n 0-280-155-074 The new SLR injectors are Bosch as well p/n 0-280-156-148 I wrote up some info here https://mbworld.org/forums/w211-amg/...ctor-data.html
Yea they were maxed out off the bottle. The good thing about the nitrous setup is that it was a wet shot so I dont rely on the injectors to add more fuel but the fuel pump.
I have the Kleemann FPR but I wanted to upgrade injectors to leave room for possible future mods
05-01-2009, 01:51 PM
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Whatever we're tuning!
It was nearing 100% injector duty cycle so Wayne backed off on the fueling to avoid static condition and the car uns a bit lean up top now. Replacing the injectors should fix that.
I dont know what pound injectors they are but they are the stock Bosch injectors for CLK55 p/n 0-280-155-074 The new SLR injectors are Bosch as well p/n 0-280-156-148 I wrote up some info here https://mbworld.org/forums/w211-amg/...ctor-data.html
Yea they were maxed out off the bottle. The good thing about the nitrous setup is that it was a wet shot so I dont rely on the injectors to add more fuel but the fuel pump.
I have the Kleemann FPR but I wanted to upgrade injectors to leave room for possible future mods
I dont know what pound injectors they are but they are the stock Bosch injectors for CLK55 p/n 0-280-155-074 The new SLR injectors are Bosch as well p/n 0-280-156-148 I wrote up some info here https://mbworld.org/forums/w211-amg/...ctor-data.html
Yea they were maxed out off the bottle. The good thing about the nitrous setup is that it was a wet shot so I dont rely on the injectors to add more fuel but the fuel pump.
I have the Kleemann FPR but I wanted to upgrade injectors to leave room for possible future mods
05-01-2009, 02:22 PM
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05-01-2009, 02:44 PM
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07 BMW X5
Does anyone know what Renntech does with the y-pipe when they do the 82mm throttle body upgrade? I recently did an 82mm tb upgrade on my car but it required a whole new intake setup and some custom work. If they reuse the stock y-pipe and airboxes that would be a pretty big restriction. I think I can make a "kit" for the 82mm tb upgrade for the 55k motors with a decent price once I find out what to do with the y-pipe section.
Edit: my setup is much different and more difficult than the 55k to work with in terms of TB placement and piping (I also have a MAF sensor but the 55k does not). TB on a 55k looks like it would be a breeze and I definitely plan on trying it on some local cars with before/after dynos.
Edit: my setup is much different and more difficult than the 55k to work with in terms of TB placement and piping (I also have a MAF sensor but the 55k does not). TB on a 55k looks like it would be a breeze and I definitely plan on trying it on some local cars with before/after dynos.
Where did you purchase the 82tb and for how much if you don't mind me asking?
05-01-2009, 02:45 PM
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Whatever we're tuning!
The Boost-A-Pump manipulates the signal(voltage) to the fuel pump and increases the voltage to it so it will increase the volume/pressure. It is a very well proven product. Check it out bro!
Of course if your injectors are too small then you are out of luck!
05-01-2009, 03:44 PM
#16
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Throttle body, housing and the other goodies is ~4 hours to be safe.
The Boost-A-Pump manipulates the signal(voltage) to the fuel pump and increases the voltage to it so it will increase the volume/pressure. It is a very well proven product. Check it out bro!
Of course if your injectors are too small then you are out of luck!
The Boost-A-Pump manipulates the signal(voltage) to the fuel pump and increases the voltage to it so it will increase the volume/pressure. It is a very well proven product. Check it out bro!
Of course if your injectors are too small then you are out of luck!
I'm pretty sure the injectors will be more than enough for now
05-04-2009, 12:31 PM
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2008 A8L, 2002 996TT X50, 2009 X5
An M112K (SRT-6) took this exact approach recently, with outstanding results - after the stock fuel system was insufficient to handle the boost he was making (AFR's ran up to 15:1 @ 6k rpm prior to this mod). BTW, was tuned by LET... so Wayne might be able to offer observations on why this may (or may not) be a better approach for M112 and M113 cars facing fueling problems.
05-04-2009, 02:03 PM
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05-04-2009, 02:27 PM
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Mercedes
Cool!
Of what? When the TB is installed on my car you can't even see it. It is tucked under the supercharger. It is different than the factory 55k cars. I will take plenty of pics when we are doing the first 55k car. There is a BIG difference between stock and the 82mm. I dont understand what the eyerolling is for. Do you think I'm lying?
Of what? When the TB is installed on my car you can't even see it. It is tucked under the supercharger. It is different than the factory 55k cars. I will take plenty of pics when we are doing the first 55k car. There is a BIG difference between stock and the 82mm. I dont understand what the eyerolling is for. Do you think I'm lying?
05-06-2009, 02:12 PM
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Well here is a cell phone comparison between stock TB and 82mm TB side by side. Sorry for the crappy quality. The stock TB opening actually fits INSIDE the 82mm opening lol. I bought a new sc inlet and getting an adapter machined by a CNC machine out of billet aluminum and welded onto the inlet. Stay tuned 
05-07-2009, 08:45 AM
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Yes it is an OEM MB part.
