I have had limited experience with these viper heads, through a friend I used to race with in England. Although I was with him so..........
He found the temperatures went up for the same tune. Maybe by as much as 30 degrees!
Although, some of this may be offset by removing the handle so as to get a better avenue for the air to get to the head. And maybe some other things along these lines too. You may nead to remove side/front windows. Things like that.
Like I said...........only limited experience. Sorry, and it was some time ago and it was at a race meeting so he did not play with it too much.
On lightening the car.........................
Well, I removed the handle. I never use it in touring car.
I removed the 5th body post and aluminum mount for it.
Using titanium pivot balls.
Only one fuel filter.....
I was using two
I know, but I'm kind of a freak when it comes to filtering fuel
Plus the extra fuel line and filter sends me over the fuel carrying limit. So didn't really have a choice!??
Thats about it.
That has me down close to 1700g. I want to get to 1690g !
We'll see.
Menace