I thought today would be a great day to start the install of my 1G TB. I ported my 2G elbow out to 60mm at the flange, I ported out my intake manifold to 60mm to match and swapped in some new shaft seals . I swapped my ISC off my 2g TB on to the 1G TB also followed by the TPS. ( ISC was cooked on the 1G )Got it all together and she didn't work to well....the throttle plate was sticking. So I ripped it all apart and redid it. Now it runs great.....pulls nice through the low RPM's.

So did it really make that much of a difference? I was thinking about doing the same. Let me know. Thanks

It has to make some difference....more probably in the long run when I make 2 1/2 inch IC piping. There can't be anything worse than a bottle neck right at the opening to your intake mani. It seems to breath better at all rpm's.

Anybody that has seen the inside of a 2G TB will agree that is a restriction.

Swaping a 1G TB is on my to do list.

Ghislain.

Think of this...most aftermarket gauges are 52mm diameter just like the 2G TB....pretty small looking aren't they.

Hmm... interesting. Maybe this should be my next mod. Thanks for the info Steve.

Sitarski has one that is bored out to 64mm. I think it was done by RRE.