All of this throttle body shaft grind talk is .............
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AMG RL thanks bro, I will probably give it ago sometime before I dyno (if nessessary get re-tuned)
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E55 w/ goods, Z32 Project underway
Guys the 20hp gains claim has been discussed in depth with track times on other threads ,please do not rehash the same old arguments here. It could be a thousand hp, means nothing if you cannot drive or put it to the ground. This explains why those here with the most HP are rarely the quickest.
Last edited by pearlpower; Jun 22, 2011 at 01:18 PM.
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2005 E55 Wagon
I grinded the shaft in my VRUS 80mm TB. All I can say is that I felt increased power right after the grind. That "increased power" could be felt for about 3 days of driving. Then, I guess I got acclimated to the increased power. However, there is no doubt you will feel the increased power. I believe ALL that hv done this mod will say the same.
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C63 507 AMG DA Car #19
To truley test this either:
A) dyno before/after (same day, same dyno) OR
B) track the car before/after (same day, same weather, same level of heat soak in engine)
I just don't see 20hp in this..... but I'm being honest.
It is VERY hard to feel 20 hp on top of 580!...... do A) or B) above and I'm a believer.
No flames...... just my opinion... we all got em
A) dyno before/after (same day, same dyno) OR
B) track the car before/after (same day, same weather, same level of heat soak in engine)
I just don't see 20hp in this..... but I'm being honest.
It is VERY hard to feel 20 hp on top of 580!...... do A) or B) above and I'm a believer.
No flames...... just my opinion... we all got em
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SL55, ML500 & Acura TL
Just thinking out loud here, but where are the extra ponies coming from? More air? If so, more air means a leaner condition. Maybe not enough more air to create dangerous AFRs, but maybe so depending upon other mods and tune.
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2012 C63 BS & 2014 E63 Estate & 2008 CLK63 BS
To truley test this either:
A) dyno before/after (same day, same dyno) OR
B) track the car before/after (same day, same weather, same level of heat soak in engine)
I just don't see 20hp in this..... but I'm being honest.
It is VERY hard to feel 20 hp on top of 580!...... do A) or B) above and I'm a believer.
No flames...... just my opinion... we all got em
A) dyno before/after (same day, same dyno) OR
B) track the car before/after (same day, same weather, same level of heat soak in engine)
I just don't see 20hp in this..... but I'm being honest.
It is VERY hard to feel 20 hp on top of 580!...... do A) or B) above and I'm a believer.
No flames...... just my opinion... we all got em
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Is this true under all conditions? The reason I ask is I had a RT pulley and tune done. The AFRs were where they should be. I then added an 80 mm TB and shorty headers. Thinking the ECU would compensate, I did not retune immediately. When I did, I learned my AFRs were on the lean side.
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From: Southern California
E55 w/ goods, Z32 Project underway
Is this true under all conditions? The reason I ask is I had a RT pulley and tune done. The AFRs were where they should be. I then added an 80 mm TB and shorty headers. Thinking the ECU would compensate, I did not retune immediately. When I did, I learned my AFRs were on the lean side.
ECU on any car will adjust but only to a certain degree. Your mods are above minor so one could not expect the ECU to compensate which is the reason for a tune to begin with.
Last edited by pearlpower; Oct 6, 2011 at 01:37 AM.
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W212 - E63 AMG
I'll jump on the bandwagon too with this and chime in with my opinion...
I did this mod myself over the weekend pretty much exactly as the pics show in the first post of this thread.
The car feels slightly more crisp on half throttle, like it is happy to give me more power at slightly less throttle input (not sure if that makes sense to anybody) but most noticeable is the full throttle surge up top. It's not a huge difference, but it's definitely noticeable and the car is slightly more willing to pull as it tears towards redline.
However, if I bought an 82mm throttle body for the insane amount that they retail for, i'd have been very disappointed in terms of power/cost, but this is apparently fairly close to it and it cost me nothing so I'm happy and enjoying the better driveability now
I did this mod myself over the weekend pretty much exactly as the pics show in the first post of this thread.
The car feels slightly more crisp on half throttle, like it is happy to give me more power at slightly less throttle input (not sure if that makes sense to anybody) but most noticeable is the full throttle surge up top. It's not a huge difference, but it's definitely noticeable and the car is slightly more willing to pull as it tears towards redline.
However, if I bought an 82mm throttle body for the insane amount that they retail for, i'd have been very disappointed in terms of power/cost, but this is apparently fairly close to it and it cost me nothing so I'm happy and enjoying the better driveability now
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Are there any pics showing how to remove the throttle body and do new gaskets need to be purchased for reassembly? Any risk of getting metal particles in the throttle body passages? Just want to be clear before I tear into mine, thanks.
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Easy to do; the issue I receive more PMs on is a code afterwards caused by not completely inserting the hose below the throttle body into the throttle body. It is also held on with a clamp that attaches to the two lower throttle body bolts. It holds the hose up into place so that it does not fall out.
Some have also had to perform a throttle body 'reset'.
Last edited by pearlpower; May 14, 2012 at 12:00 AM.
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2011 C63 AMG, 589hp
Nice thread. did this on my c55 the other day, no chance to drive it due to snow.
but i did som calculations for fun.
you almost gain area equal to an 78mm throttlebody if you grind the shaft down to 5mm wide, originally it´s 10mm.
And to put sugar on top,, adding an 80mm throttle on an std C55 or early e55(N/A) will not gain as much as it could due to the area in elbow is to small likewise the airmeter.
Rgds
Patrick
but i did som calculations for fun.
you almost gain area equal to an 78mm throttlebody if you grind the shaft down to 5mm wide, originally it´s 10mm.
And to put sugar on top,, adding an 80mm throttle on an std C55 or early e55(N/A) will not gain as much as it could due to the area in elbow is to small likewise the airmeter.
Rgds
Patrick
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C5 LS6 and CLS55
WTF, grinding the shaft down? I'm confused. Do you all mean "Porting" the TB?
Are you porting around the blade or grinding the bar in the middle of the TB?
Are you porting around the blade or grinding the bar in the middle of the TB?
Last edited by Blown_V8s; Dec 19, 2012 at 05:14 PM.
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Nice job and great pics! Use locktight on the screws for saftey, in case you did not use any.
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
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