manifolds amd throttle body, 2.8 vs 2.9 back to back dyno runs. anyone?

[breeza18 0]

hi all, as the title really, everyone says the 2.9 tb and manifold is the better one to go for but i cant find any hard evidence on this?? if the 2.9 is better for power mayber the 2.8 is better for torque?? im interested in any info or input on this please

Ash

[FishWick 21]

Not sure if it helps but I've run the 2.9 throttle and intake on my Corrado, and also the OBD2 setup (smallest throttle) and intake etc and I preferred how it drove on the 2.8 stuff.

The 2.9 stuff gives small gains at the top end but the throttle is a lot heavier.

[breeza18 0]

cheers Kev, it supprising how a lot of people say the 2.9 stuff is better but there is not a lot of evidence to back it all up. if running FI then the 2.9 parts may prove there worth but im more interested in n/a comparrisons if there is any

[FishWick 21]

I think the whole reason behind the 2.9 was to make the Corrado the fastest production VW, which it was until the R32 came along. They just wanted to eek 150mph out of it on the Autobahn, so it needed some top end.... hence the breathing setup for a more pronounced pull up there.

The Corrado doesn't really start pulling until 4000rpm. It's a sluggish old boat below that. Leggy gearing, heavy car, it's pretty underwhelming!

By comparison, the MK3 OBD2 VR6s (highline etc) pull just aswell, are just as quick, but have more torque low down.

To be perfectly honest I have no idea why folk want the 2.9 stuff really. I was glad to get it off my engine, LOL! :-) I've not even found a use for it in Forced induction either. I ended up putting a standard 2.8 throttle back on.

[breeza18 0]

thats some good info Kev! looks like its a numbers game then really, because it says 2.9 it must be better than 2.8 lol, i prefere the low down grunt over having to ring its neck all the time, makes for a much more refined drive