rizampi

I would like to use a larger throttle body on my e55 amg, does the torque move up to high rpm? Or to low rpm?
Klemman says that it increases immediately on the whole rpm. What is your comments?

Viet_Amg408

more air more power...

rizampi

Yes...but the more power is moved to the high, low or whole rpm?
Recently I have installed the klee long headers and the torque move to high rpm. I not like this. I like power on low rpm...

LOCO 05' E55

Dude- what are you implying??? Thats by far one of the most beneficial mod your car will ever see throughout the powerband..that is if you do a re tune off course..

rizampi

Perfect! What you're saying is that more power is to be at high rpm at low rpm?
This is fine with me, as I said before I like that the car does not lose torque at low rpm.
Ok, thanks

Forrest Gump 9

The 82mm tb will actually regain the low end torque that you lost with the headers. It actually moves the whole power band upward.

Also, if you add an H-pipe or X-pipe in your exhaust system that will help you get back the low end torque too. Good luck with your power quest.

E55Bullet

How in the world can you guys tell the loss or gain of a little trq in our monsters?

Viet_Amg408

yes you can...

skratch77

I noticed a loss in low end with my kleemans with cat delete.

I actually did a dyno with before and after and the headers actually lost power all the way up to 5k and then made like 5whp more than without them.

I think I lost maybe 1.1-5 psi from them but gained the power back with tuning and bigger pulley.

I never really understood how some people say that headers picked up 40whp

Viet_Amg408

its like you Sh*t out faster then you can take in

throttle body and K&N filter and a tune should fix it

kindafast

Maybe it was the difference in DA

Those people are called sponsors and they are in the business of selling car modifications. Do you understand now?

Rust bucket

Its been proven over and over and over.

GT-ER

That's really interesting. I wouldn't believe it if I would have seen it over and over on this forum from various people getting those kinds of gains. Especially since I saw the pics of the oem manifolds cut open...they are absurd.

skratch77

I lost boost so the gains came back with tuning.I made 460 whp then 465 with headers only and no retune

Then on another file did 470 and now my car has a new file but I havnt gone to the dyno yet.

Ill be happy with 480 on my dyno,its the same type of dyno loco has used and he made 490whp and runs 10s in the 1/4.

Im sure those dynos are on stock tuning that are picking up crazzy power but my car with its tune lost power all threw the power band after going headers and no cats.its normal for it to lose low end because the ve of the engine is flowing so much more and you lose a few pounds of boost.

The gains come from tuning more agressive with the headers and bigger pulley to get that boost back

Rust bucket

GOD reading your posts makes my head spin. Just because you lose boost does not mean you lose power better flow means more air is moving less resistance thus less boost. Removing hot side resistance does not make a supercharged car LOSE power.

skratch77

I have my dynos right in front of me bro and we looged boost also.

Ill upload a few to see.I went to the dyno expecting to see 40whp and saw a loss of power everywhere and the a/f got leaner

Guys take this for what you want,This was my car and my money spent.here is a before and after dyno and the only thing I changed was headers and no cats.The dyno was done a few days apart and had the same gas in the car.the mods in this dyno were.

Stock pulley
Tune
H/E
Renntech airbox
python tubes
Stock throttle body

the only thing that changed was the headers and cat delete.As you can see it lost power from 3k(even worse on the street from 2k)and lost it all threw the power band and made a few up top end.

Rust bucket

skratch77

What happened to my 40whp

like I said man,im not selling anything and that was my before and after and the car felt lazzy from 1.8-3k


Maybe you should go dyno your car,then pay 2k and get headers on and then redyno and see what ya get

Ohh and dont touch the tune

I can also back up those dynos with 1/4 slips trapping the same mph

GT-ER

Makes sense to me since the ECU doesn't know there is more airflow going in ( Our cars are mafless ). Lower boost would cause the ecu to search for values outside the areas of the map that it normally finds it's values and if the car had a weak tune at those values then it would lose power big time ( For example, your car was tuned perfectly for 15psi but not 13psi and when boost goes down to 13psi the ecu requests timing/fuel values that are weak in comparison to the 15psi ).

I know very little about MB ecu... but this happens on other cars I've tuned.

shardul

iTrader: (1)

can anyone quantify how much hp is picked up just by upgrading to a 82mm

skratch77

IM on the fence going back to a bigger tb and if I do it will be an 80mm to fit my airbox and there will be a before and after dyno

shardul

iTrader: (1)

thanks
I have been reading infomation on the kennebell website and according to them a 74mm is good till about 600rwhp before it starts to become a restriction. What do you all think?

skratch77

I think there is power to be made with a retune and bigger tb,but not what people seem to think they gain.

I say with a proper retune and bigger tb 10-15whp is doable.

Remember MB did put the 80mm on the sl55 so it must of made a difference

Rust bucket

Been there done that car picked up 50whp from LT's and 3" exhaust 2K?? more like $7,500

skratch77

Thats amazing!!!

My car on my dyno picked up 70whp with
pulley
tune
headers/cats
renntech box/pythons
H/E

so you picked up 50whp with just headers?

do you have the before and after dyno and was it on the same tune or did they retune?

I picked up 30whp just from putting a tune on a stock car.

I never said headers dont make more power,you have to tune for them.With me I lost a little bit without a retune.