97 challenger 5000-5500 flat spot

[fixitmanmc]

Finally got to the lake today for the first knee boarding with this machine.
Cleaned and redid the raves couples of weeks ago and seemed ok except for the 5000-5500 range. It seems to have no throttle response there, escpecially with a knee boarder in tow. You can let off the throttle and crack it again and it does ok for 2-3 minute and then same old non response. This makes it difficult to maintain a steady speed. It runs out good at 5600-6500. The idle also seems a bit high around 2100, what / how is the best way to address these issues?

 

[Dr Honda]

If you had the RAVES apart, and it's OK everywhere else... I would say to turn the RAVE adjusting screws in. They are probably opening too soon, and you are loosing torque.

 

[fixitmanmc]

Thank you for the replies.

Do these springs tend to lose tension over the years?

I know with the GM 604 crate engines the valve springs are a problem being turned 5800-6200 constantly.

I tried adjusting the tension when they were redone, and really could not see a big difference between all the way in and all the way out 1-3 turns at a time.

Seems better hole shots all the way in; which I think I left them; hmm

I procured another set the other day still with the red bellows and have the new kit for them to have as a spare; just wondering about replacing the springs.