Idle RPM

[Madgyver]

What's your idle RPM?

Motor size and trans.
Cam
EFI or carb'd

 

[70_Steve]

351W, cam has a little bump at idle. 700ish rpm with Ford EFI, A9P EEC

 

[americanhorses]

Mine is close to 700 also.
302
mild cam
BC q-jet

 

[broncodriver99]

Original 302 .030 over with Autolite 4100, stock 3 speed, "RV" cam. Idles at 700 once warmed up and off of choke.

 

[SSDDBRONCO]

Mine's at 700 RPM

302 with c4
RV cam
Holley 470 t/a

 

[bax]

700 efi cleveland.

 

[bronconate68]

408w, 4r70w, 670 cfm carb, 800 rpm.
302, C4, RV cam, 600 cfm carb, 800 rpm

 

[74strokerbronco]

408w c4 with 3400 stall, large solid roller cam, 950 carb, 1100-1200 out of gear and 800-900 in gear.

 

[broncosbybart]

Stock 98' Explorer 5.0 w/Mustang MAF and A9L. About 800 RPM.

 

[Yeller]

Umm well you know @ 625

 

[savage]

74 with 302,bored .60 over,edge rock r600,c-4,rv cam.700 at idle and 500 in gear.Runs around 180 to 195 temp.

 

[DuctTape]

I guess I have my idle set too high... How does one know what the "right" idle is? I have an aggressive cam and I've tried setting idle lower than my current 900-1000 (and I thought adjusting idle mixture the right way) but it lopes a bit at 700-800.

 

[savage]

How do you keep it from slamming hard into gear on a automatic when your running idle at 900 to 1200 ? With my idle set at 700, it still fells like it engages hard.

 

[DuctTape]

I've got a manual tranny.

 

[broncoitis]

Mines Too HIGH!

Ok, so this is a thread to frustrate me! 302, .040 over, 351 windsor cam, Mass Air EFI, Explorer Upper and Lower intake and idles around 900 to 1000 rpm. Definitely high compared to the avg being 700ish!

 

[bronconut73]

650 to 700 rpm for years. Recently I bumped to about 800 to 850 to get a little better ps performance at idle. I'll probably go back to 700 when I get a smaller ps pump pulley.
Built Windsor
C-4

 

[Madgyver]

Mines at 700 with a lopey idle. 650 with a bump in it. At 800 up it smooth with no attitude.
351W .030, crower baja beast cam. NP435.
I have throttle/idle adjustment on my dash.

 

[67RT]

302 3 spd autolite 2100

750 warm. Haven't got choke idle figured out or cold start without choke engaged in summer.

In summer with cold engine and no choke engaged it takes about a minute of throttling to get it going without wanting to die? Fresh pro-rebuilt of carb. Have idle screws adjusted for max vacuum and runs great once warm... I think I need to adjust so it has some choke..

 

[jckkys]

My 351 idles smooth at 500. It barely moves in drive with the stock converter. I built it for low end torque and don't care what it does over 4000 RPM. In fact it only goes over 3000 about 5 percent of the time.