JohnSchiavarelli

Ben/Eddie: That is a great idea.. Since the season is coming to a close I can easily remove both pipes and ship them.. I will call them 1st thing Monday AM for advice..

Kvot: reversion has crossed my mind.. In the 4 years I have run this motor though I don't think I have found any evidence of this. What would be a perfect tell-tail sign? I have CMI Etops..

Back: Currently I am running a hurricane intake. Actually the only piece on the entire motor I am not very failure/happy with.. The block is a Merlin III and the heads are Canfield.. I would think a 980 CFM modified by Nickerson would not be too big though.. My WOT is only 5200/5300 right now with a Hydro P5 26 pitch prop.. Just got the prop 3 weeks ago and seems to have lost a few RPMs..

Back4More

An 850 Demon would support 700HP at that rpm.

JohnSchiavarelli

700hp?? @ 5200/5300?? Interesting.. This 540 dyned @ a tender 622 hp.. closer to the 5600 rpm range.. would the intake really puddle fuel? This is possible? Does open an interesting thought process..But if that was true would it happen at all RPMs? when I start it and warm it put it in gear without even running over 1200 rpms for warm up the problem is present.

Back4More

http://www.barrygrant.com/demon/defa...ge=techsupport

Griff

There should not be any reversion with that cam. Many people, including me, have run much larger cams with no issues. I ran a Crane 731 which is 226/236, .587/.610 on a 112 lob sep without a hint of reversion in a 454ci.

fbc25el

I have almost the same set up as you. 540 with AFR heads cam 236/[email protected] 112 lc. Nickerson also did my carb. My carb. is a 1050 domminator and it idles perfect at 750 rpm so i dont think your carb. is too big. When i set my idle i make sure my throtle plates front and rear are set the same. I also use a 4.5 power valve front and rear.

JohnSchiavarelli

I think Dean said I have a 5.5 PV?? Have to verify tomorrow when I talk to him..Are you @ 750 in gear or neutral? My front and rear are also set the same.. But it does seems to like being off the idle circuit in the rear.. I know Nickerson does great work.. This carb runs awesome other then the idle.. And I know several people who have had Dean work on their stuff.. Always top quality.. but if it is NOT the carb what the heck is it? Guess I will have to try and borrow a 4150 style carb and put this issue to bed once and for all..

fbc25el

That is in gear i keep abuot 850 out of gear.Did you degree the cam in?do you have any valves too tight? What kind of fuel pressure are you running and are the floats set correct?

JohnSchiavarelli

The cam was "supposed" to be degreed.. But since I was not present for the assembly up till the heads I am not 100% sure it was actually done.. Anyway to check without removing the motor??
I just went through the valves while the carb was at nickerson. Hydrollic roller. tighten nut by hand till tight then 3/4 turn right? Also have a stud girdle but I am sure that makes no difference. 7 1/2 PSI fuel pressure and yes floats are good..

fbc25el

I set mine at 1/2 a turn. Make sure you are on the heel of the cam. there are sevral whays of doing that. I use cranes method there web site explains how to do it. Set the push rod to zero then tighten the nut. Make sure there are no bent studs if there is when you tighten the stud girtle it could change your setting.