Johncy2000

Is there any way of grinding the stock throttle body without running CEL issues?

KLR CLS

Cheap way is to get 82mm Audi S4 Tb, have someone weld up a plate to the TB Snout, and Flip the 4 and 6 pins.

FTW I ran ported TB without Cel for a few months

tbal

Grinded my stocker, no CEL. Just make sure you following the TB reset procedure, and not unplug any nessessary hoses along the way, you wont have any CEL issues! Check out my thread on the TB grind and CEL.

Hammer Down

If I were you I would have the 8omm inlet housing modified to except the 82mm TB by welding additional aluminum so that the wider TB will bolt up as if it were stock. The two inner holes at the bottom of the 3rd pic are the factory holes and the outer holes have been added to fit the larger TB.

Johncy2000

Where can I get this part?

Hammer Down

Dealership

MB 82mm t/b: 2731410325
-82mm t/b gasket: 2731410680- 14.61 retail
-80mm s/c inlet: 1131400912- 436.80 retail
-s/c inlet gasket: 1131410780- 13.78 retail
-80mm Y-pipe: 1130900329- 286 retail

but if you know someone that works there maybe they can get you the parts at cost or better......

skratch77

Has there been any back to back dyno's that actually show a gain with a bigger TB?Like not with a retune just a heads up swap?

I just hit the dyno and finally used a dynojet.

car made like 500whp on the second pull and would of made more if we did a 4th gear pull on the first pull instead of 3rd.

I told him to do 3rd because Im used to a loading dyno and 4th gear puts massive strain on the car and thought it would be the same on a dynojet.Legit 4th gear pull would take close to 40 seconds to complete on my old dyno.On the dynojet it was over in like 6 seconds.

Next time Ill do a 4th gear pull on a cold blower in 4th for sure.

I think with a 185 pulley Ill break 550whp and thats with a stock TB

I had 597rwt on the 3rd pull in 4th gear and the owner said I would of broke 600 easy if we did a 4th pull from the start with a cold blower.

Its crazzy how much higher my car is doing from my other dyno that uses a loading dyno.I think Im up 60ftls and 60whp over my old dyno.

Hammer Down

I thought all dyno pulls were suppose to be done in 3rd? if it's done right in 3rd you avoid the kickdown and if you dyno in 4th it takes so long due to gearing & avoiding the kickdown

skratch77

My car dosnt kickdown but my brotgers 04 did.you are supposed to dyno in 4th as its 1:1 ratio.

GT-ER

the ratio thing really doesn't matter, the dyno compensates. I've dyno'd over two dozen cars in just about every gear possible and they all give near identical numbers. The only problem is when you have wheel spin or in turbo cars when a gear is too short and the turbo lag is more apparent.

regardless, I too am skeptical of the larger TB's making as much power as some say they do.

skratch77

I piked up about 35ftlbs using 4th and the dyno guy said 4th gear will load the engine more and make more torque.

Hammer Down

Well I guess one could say that all of the 55K powered cars that have run 10.xx have the 82mm TB and I know that there are other variables factor into a 10 sec run but the other 55K powered cars that have run 10's were done on NOS.

Forrest Gump 9

Here's mine.

https://mbworld.org/forums/w211-amg/...o-session.html

skratch77

Looks good but you changed the whole intake setup along with the TB on that pull.

I already opened up the intake as much as I can with the airbox and python tubes but Im still on the stock TB.

on the dyno sheet it also says baseline vs headers and TB.Did you have the headers on before the TB?

skratch77

A lot of those cars are also running meth and race gas along with 190mm pulleys.

and 35 degree air temps help also.

I might buy a 185mm pulley and see what I dyno,I think I can pick up 20-25whp going from a 178

Forrest Gump 9

The first graph was with the headers, the second graph was headers, 82mm tb, and intake. The second graph gained 37 whp if I remember correctly. The reason I didn't go with the stock intake because it wouldnt fit.

Hammer Down

The top 5 guys with 82mm that ran 10's all had 180 pulley's and no meth at the time of their runs and there was only one to run with 40 degree temps another @ 56 and the remaining three above 60. Some of us aren't as fortunate to have 93 @ the pump so we have to mix race gas or in some cases run 100@ the track.

From what I can recall the 82mm buzz started with Angela's car at a private event when her was blazing down the track with higher mph than guys with the same mods with the difference being the 82mm TB. Maybe someone like Mo or Mikey can chime in as they were there that day.

GT-ER

It may make more torque initially because our cars are automatic, but it's usually just a small peak and then it settles. I dyno'd my E55 in 3rd and 4th and while I hit the top speed limiter in 4th, the power was identical all the way to 155mph. I haven't tried it yet with my current mods because the pull just takes sooooo long compared to 3rd. But all my other cars have been the same as well as every car I've tuned on the dyno.

GT-ER

Damn....I just can't believe they gain that much power when our throttles aren't small to begin with. They are pretty darn big imo.

AMGPilot

Ummm no

skratch77

From what i was told today,1:1 ratio will always show more torque and same hp as 3rd

GT-ER

Then why does it show more torque initially?

AKnight55

Because our cars make more torque down low

GT-ER

Here is a quick comparison from when I had my GTI. One dyno was in 3rd gear and the other in 4th gear. This was on a smallish turbo ( I ran 6 different turbo setups on the car...lol ) and on pump gas.



Notice how there is only a 3whp difference and 14wtrq difference which can be explained from the turbo spooling slightly quicker due to the taller gear. In the E55, this doesn't matter since the supercharger will always have the same amount of boost regardless if it's in 3rd or 4th.

In my Grand Prix, being automatic, if I dyno'd in a taller gear the car would give a slight bit of torque as soon as I go wot and then it'll level out with the lower geared graph. I figured it was the torque converter stalling slightly higher due to the additional load. Any can correct me on this, but I've done dyno's in just about every gear ( even 1st gear on some cars ) and the numbers rarely change.

GT-ER

I mean, why does the torque go higher in 4th than in 3rd.