MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: KieranM on September 07, 2015, 07:49:18 pm

Title: 3.5" Downpipe vs. 3"
Post by: KieranM on September 07, 2015, 07:49:18 pm

Is there a noticeable performance difference with a 3.5" compared too a 3" downpipe?

Title: Re: 3.5" Downpipe vs. 3"
Post by: Mitch H on September 07, 2015, 10:29:14 pm

I think it's only necessary when fitting a bigger turbo or chasing the very big number with wmi and trying to squeeze every last drop out of it. Not sure though maybe wrong

Title: Re: 3.5" Downpipe vs. 3"
Post by: Tfsi_Mike on September 08, 2015, 01:01:39 am

I wouldn't expect to notice the difference by simply changing from 3" - 90mm but I am doing it to make sure the flow is as good as it can be to allow safe linear power to be extracted from the TTE420 turbo :)

Title: Re: 3.5" Downpipe vs. 3"
Post by: olethalb on September 08, 2015, 08:29:40 am

i noticed a difference with it being the only mod, i think it's because the outlet of the turbo is then matched to the downpipe, how far the 3.5" section needs to extend i'm unsure.

Title: Re: 3.5" Downpipe vs. 3"
Post by: Tfsi_Mike on September 08, 2015, 10:39:33 am

That's good to hear :)