An interesting idea

[treynor]

It has become common knowledge that the '00+ Vipers do not respond as well to exhaust mods as do the pre-'00 cars. This is presumed to be a result of the milder cam. I would very much like to see dyno results from someone adding 1.7 roller rockers to an otherwise bolt-on only '00+ car (i.e., no heads, no cam). I suspect most of the HP deficit seen in headers+exhaust '00+ cars would disappear with the addition of these rockers, as the increased lift and duration would negate most of the effects of the milder cam. It's certainly a less radical, and much less expensive, change than swapping heads.

Anyone game (Wayne, where are you) ? For that matter, are there any tuners out there who have tried adding just 1.7 rockers, and would be willing to share results?

 

[bad viper]

I can't help with that question..all my mods done at once
after nitrous added.I'm sure TNT,Hennessey etc
have done so many dyno runs they can tell you
if adding a coontail really adds 5 HP!
Anyhow just pull the cats use Borla sportsman..
exhaust will work at peak.

 

[VEETENN]

My understanding is that 1.7 roller rockers by themselves will give very little increase in power if any, maybe 5+hp if lucky. The main purpose of roller rockers as I understand it is increased reliablity and lower valve train friction with high rpm and or high lift cams.

 

[LTHL VPR]

These and other answers coming soon! I will be testing a variety of setups and posting the results on the board.
Stay tuned!