I was just wondering what PRM do you guys with roller motor idle at? Does it depends on the duration at 50? Is there a rpm that is to low and can hurt a camshaft and or lifters? I mean like under 1000 rpm

I idle @ 1200 , I have no oiling to the lifters so @ 1200 the stuff is getting wet, anything under 1000 it sounds like one cyl firing at a time

I idle at 1200 in neutral and 950 - 1000 in gear,
cam is 276/282 @ 50

I believe my cam is very close to Mr_p_body

281/288 cam, 112 lobe center. I have it idle around 1200, it would idle lower but no need to.

1200/1300 for mine too.

Good info as I am just now fooling with the new motor. Thanks guys.

I have idled my 518 at or under 900 RPM in gear with the Mopar brand roller lifters for over three years of street and strip racing, after breaking two of them(the wheels ) and calling Engle, (I thought the Mopar brand where being made by Engle) NOT. Mark Engle said to not let any non pressurized roller lifter idle less than 1300 RPM in gear and have it idle closer to 1500 rpm to ensure adequate splash oiling to the needles in the roller wheels It kind of makes sense I wil probally follow those guidelines from now on

That is the reason i was asking as i am getting my new motor straight also.My brother said he thinks it should idle around 1500 like cab_burge said so nothing gets hurt

My roller cammed blown hemi idles at 2200 RPM and I try to keep it above that during the burnout and staging to keep those plugs warm. My cam doesn't make power until 8800-9800 RPMs

A roller cam is less suspect to lack of lub because it's rolling on the lobes not sliding on them.

My 275-280 @ .050 Isky cam idles at about 1200 in park and around 950-1000 in gear and has seen thousands of street miles and many passes going on 4 1/2 years.

Mine seems happy around 1500-1600 RPM.

1300 rpm's for me in nuetral but the hemi likes 1400, keeps plugs clean and feels crisp when i crack the throttle.

1200-n
900-1000-in gear

1400

About 1200 in park, 1100 in gear. 281/283 at .050 roller.

1100- 900-1000 in gear

I called bullet cams today and they said a roller with 276/280@50 should idle at 1500 to 1550 to keep the plugs clean as one member said.Also under that rpm if you are trying to flash the converter the car will stumble.Very good customer service and didnt spend a dime with them,well at that time.two thumbs up to bullet racing

If your carb has the idle circuit set up correctly, the plugs will stay clean no matter what RPM

950 rpm for me with a 279/286 and a 4 spd with the dist locked out...

700 rpm in gear. lots of streeet miles.
mild profile ramps, comp cams 4149 and 4020.

~ 1,800 - 1,900 for me. Any less and it wants to shut off.

Well, my cam isn't the smallest out there. It is like 660 lift w/ 332 duration. At 1800 you can hear each cylinder fire with open headers.

Idle around 1450rpm

I just fired the new engine this week (383 + .030, 4.25 stroke, Engle roller - 262 @ .050, 1.6 Harland Sharps, Herbert lifters and Herbert HERS637 springs).

Have idle set at 1200 due to people here and on speedtalk.com recommending higher idle to keep lifters' rollers lubed.

I could probably set the idle down to around 900 or so, but the convertor allows smooth engagement into gear at the present speed, and I don't want to 'learn something the hard (money) way'.

Right now I have to put smaller restricters in the heads, since the HS rockers allow all the oil to FLY out the rocker shafts...

Will be checking rollers periodically for a while to make sure they're hanging in there.

.02 and a bump...

-Bill

I guess chebbies just idle lower....900-1000 w/900 inches of lift little 565 cube....

Rickster