Power valve? - Page 2

Sean Marconette · 07-17-2016, 03:56 PM

I always blocked the PV on my carbed stocker. You have a different load now compared to when it had a converter.

Sean

BLIND MULE · 07-17-2016, 04:22 PM

I have had quite a few alky carbs seen and rebuilt others for friends and have NEVER seen one with a Primary or otherwise PV! Not sure it's real common?

Dana Fitzpatrick · 07-17-2016, 06:56 PM

Quote:

Originally Posted by Sean Marconette

I always blocked the PV on my carbed stocker. You have a different load now compared to when it had a converter.

Sean

Thanks,Sean. I wondered if that's the problem,the converter flashed to around 5,800. Thanks.

Woodfin · 07-17-2016, 09:26 PM

BLP and APD both use primary power valves with Methanol. I should have said, "power valve usage with Methanol in common with BLP and APD"

Yet, I am off subject for the original question, I apologize.

Makinchips · 07-18-2016, 06:38 AM

Your running on the transition circuit in the pits, it's prob lean. Power valve has nothing to do with that unless it leaks. Then it will pull fuel down the vacuum port behind it.

Lenny5160 · 07-19-2016, 01:13 PM

Quote:

Originally Posted by Woodfin

BLP and APD both use primary power valves with Methanol. I should have said, "power valve usage with Methanol in common with BLP and APD"

Yet, I am off subject for the original question, I apologize.

My APD HP1000 methanol carb has never had a power valve in it. I've had 3 methanol carbs over the years, and none have used power valves.

Philip Baise · 07-23-2016, 07:22 AM

Take it out and plug it. It does not affect idle or transition to the booster. Yes it works on engine vacuum ,but it only richens the mixture when the vac is low and the engine is pulling fuel thru the boosters. You should bump your primary jet size up if you do take it out. on our 585 we usually go 76 pri and 78 sec. 396 motors 78 pri and 80 sec.

Dana Fitzpatrick · 07-23-2016, 11:10 AM

Thanks for all the replies,they give me some good direction on fixing the problem.

07-17-2016, 03:56 PM	#11
Sean Marconette Senior Member Join Date: Mar 2006 Posts: 958 Likes: 617 Liked 165 Times in 60 Posts	Re: Power valve? I always blocked the PV on my carbed stocker. You have a different load now compared to when it had a converter. Sean __________________ Sean Marconette 84 Mustang 5060 SS/N

07-17-2016, 04:22 PM	#12
BLIND MULE Member Join Date: Dec 2002 Location: Alabama Posts: 319 Likes: 0 Liked 0 Times in 0 Posts	Re: Power valve? I have had quite a few alky carbs seen and rebuilt others for friends and have NEVER seen one with a Primary or otherwise PV! Not sure it's real common?

07-17-2016, 09:26 PM	#14
Woodfin Member Join Date: Sep 2006 Location: Kilgore TX Posts: 427 Likes: 5 Liked 70 Times in 38 Posts	Re: Power valve? BLP and APD both use primary power valves with Methanol. I should have said, "power valve usage with Methanol in common with BLP and APD" Yet, I am off subject for the original question, I apologize.

07-18-2016, 06:38 AM	#15
Makinchips Junior Member Join Date: Apr 2016 Posts: 26 Likes: 0 Liked 3 Times in 3 Posts	Re: Power valve? Your running on the transition circuit in the pits, it's prob lean. Power valve has nothing to do with that unless it leaks. Then it will pull fuel down the vacuum port behind it.

07-23-2016, 07:22 AM	#17
Philip Baise Junior Member Join Date: May 2003 Location: Griderville Posts: 32 Likes: 0 Liked 0 Times in 0 Posts	Re: Power valve? Take it out and plug it. It does not affect idle or transition to the booster. Yes it works on engine vacuum ,but it only richens the mixture when the vac is low and the engine is pulling fuel thru the boosters. You should bump your primary jet size up if you do take it out. on our 585 we usually go 76 pri and 78 sec. 396 motors 78 pri and 80 sec.

07-23-2016, 11:10 AM	#18
Dana Fitzpatrick Member Join Date: May 2009 Posts: 148 Likes: 4 Liked 10 Times in 6 Posts	Re: Power valve? Thanks for all the replies,they give me some good direction on fixing the problem.