i just installed a set of 20x11R and 10x9F i also installed a issforged des exhaust system same time i took my car out for a test drive and it doesnt seem to have the same push it used to . could this be something wrong with my car or are the wheels to blame they are 3 piece forged nutek wheels

 

Are you just basing this off of the butt dyno?

 

heavier wheels slow down a car. i bet you those 20s weight 2x more than your factory wheels. thats why i sold my 20s and had light weight 19s made.

 

Agreed.


OP... Are your wheels race prepped? My Strasse wheels are lighter than our stock wheels

 

Unsprung weight is even worse than "sprung" weight. Adding 50lbs of weight at your wheels and tires will make you feel slower than if you added a 50lb kid to your passenger seat. The stock wheels and tires are surely lighter than whatever wheels you just added.

 

Same here from Strasse... Wider and lighter than factory

 

does anyone know if linea corse 19x10 with falken 452 255/275 are a lot heavier then stock ?

 

^ This

I wouldn't personally go for 20's.

Light weight 19's and you're sorted.

 

That's why I did not go with the 3 pc Nuteks. I went with 1 piece forged monoblocs. I have 20s but they are lighter than stock. With the wheel and tire combo, I probably added like just 5 lbs each side in the rear. I matched the stock front wheel and tire weight.

 

20's are probably heavier, also what tire size are you running. Are you still at 26" outer diameter? If you are bigger you have changed the finial drive ratio and that will also slow you down.

 

20" would increase your general wheel diameter which will make you slower as Ucrazykid stated

 

If some of the things people are mentioning above are true, the weight/size of the wheels could be such that it offsets the 20+whp gains from the exhaust installed at the same time. Major bummer. For fun you should slap on the stock wheels for a quick test drive and you'll have your answer.

 

It depends on your tire size. If your rolling diameter is really close to stock, then you are fine. Am just not sure what the tolerances are goin up or down.

 

yep, bumping up your tires making your overall wheel/tire set up heavier will affect throttle and feel, wont affect overall power at wide open throttle though. I got my wheels to be lighter up front by 9 lbs each up front and 7 lbs rear and car feels very nimble, throttle response is drastically better.

 

down side of 3 piece 20s for sure is the added weight to each corner but daymmmm do they look good