Average range RPMs for 700R - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jbgroby · 06-23-2020, 08:44 PM

Hi gang,

We put the 700R behind the 305 V-6. I want to make sure of the rpms at idle?

What do y'all think?

jbgroby · 06-23-2020, 08:45 PM

Edit

**Steeveedee** · 06-23-2020, 09:56 PM

I'm pretty sure that that V-6 idles at a low enough speed that you should be OK with stock idle. Just so it doesn't creep at idle should be good enough.

jbgroby · 06-23-2020, 10:05 PM

Would you have an idea? We have it falling between 650-675. When I shut the engine off I'm getting a backfire and studdering. A friend told me to check timing and the rpms.. because I put the 700R in, I'm unsure what range it should be.

**Steeveedee** · 06-24-2020, 11:21 AM

The only way that timing would cause run-on is if it is retarded enough that you had to crank the idle speed up. So, yes, make sure that the timing is correct. Did you change anything except the transmission? It's possible that you could have a bit too much tension on the detent cable and it could be cracking the throttle a bit. That is an easy check.

06-23-2020, 08:44 PM	#1
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Average range RPMs for 700R Hi gang, We put the 700R behind the 305 V-6. I want to make sure of the rpms at idle? What do y'all think? __________________ http://s1299.photobucket.com/user/jb...23904108567829

06-23-2020, 08:45 PM	#2
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Average range RPMs for 700R Edit __________________ http://s1299.photobucket.com/user/jb...23904108567829

06-23-2020, 09:56 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,724	Re: Average range RPMs for 700R I'm pretty sure that that V-6 idles at a low enough speed that you should be OK with stock idle. Just so it doesn't creep at idle should be good enough. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

06-23-2020, 10:05 PM	#4
jbgroby Registered User Join Date: Nov 2008 Location: Lacombe, LA Posts: 2,772	Re: Average range RPMs for 700R Would you have an idea? We have it falling between 650-675. When I shut the engine off I'm getting a backfire and studdering. A friend told me to check timing and the rpms.. because I put the 700R in, I'm unsure what range it should be. __________________ http://s1299.photobucket.com/user/jb...23904108567829

06-24-2020, 11:21 AM	#5
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,724	Re: Average range RPMs for 700R The only way that timing would cause run-on is if it is retarded enough that you had to crank the idle speed up. So, yes, make sure that the timing is correct. Did you change anything except the transmission? It's possible that you could have a bit too much tension on the detent cable and it could be cracking the throttle a bit. That is an easy check. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA



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