Pressure reg for q-jet - Page 2

Wade_Owens · 04-21-2010, 10:15 AM

I was having trouble with a stumble off the line. I had a Holley Volu-max 250 and a common 2 port holley regulator. I talked to several people and they told me I needed more volume. It showed on the RacePak in was dropping down to less than 2lbs on the launch.
I bought an Aeromotive a1000 and regulator, changed the fuel lines to eliminate every bend I could. Nothing changed, still stumbled and dropped on the launch. Robin Brown told me the same thing on his car. Spent mucho $$$ and still had the same issues with no increase in et.
After arguing with DeanO for months, he suggested that maybe the laws of physics are different under the hood of my car. He was right all along, they arent. I started listening and the results were as he said. We lowered the pressure and this corrected the issue. 6.5 to 7lbs for me, no more "high pressure" stuff.

Wade O

junior barns · 04-21-2010, 03:32 PM

Wade Owens

You are talking 6.5lbs from the reg to the carb???

Alkey Alex · 04-21-2010, 10:38 PM

Quote:

Originally Posted by junior barns

Wade Owens

You are talking 6.5lbs from the reg to the carb???

Yes, 6.5 to 7 lbs at the carb from regulator. Pump pressure to reg is 40-45 lbs if I remember correctly.

Wade O

junior barns · 04-21-2010, 10:54 PM

WOW that seems like alot 40 to 45lbs at the pump.

Thanks for the reply.

04-21-2010, 10:15 AM	#11
Wade_Owens Senior Member Join Date: Jul 2007 Posts: 578 Likes: 0 Liked 3 Times in 1 Post	Re: Pressure reg for q-jet I was having trouble with a stumble off the line. I had a Holley Volu-max 250 and a common 2 port holley regulator. I talked to several people and they told me I needed more volume. It showed on the RacePak in was dropping down to less than 2lbs on the launch. I bought an Aeromotive a1000 and regulator, changed the fuel lines to eliminate every bend I could. Nothing changed, still stumbled and dropped on the launch. Robin Brown told me the same thing on his car. Spent mucho $$$ and still had the same issues with no increase in et. After arguing with DeanO for months, he suggested that maybe the laws of physics are different under the hood of my car. He was right all along, they arent. I started listening and the results were as he said. We lowered the pressure and this corrected the issue. 6.5 to 7lbs for me, no more "high pressure" stuff. Wade O

04-21-2010, 03:32 PM	#12
junior barns Senior Member Join Date: Jun 2006 Posts: 541 Likes: 11 Liked 20 Times in 14 Posts	Re: Pressure reg for q-jet Wade Owens You are talking 6.5lbs from the reg to the carb???

04-21-2010, 10:54 PM	#14
junior barns Senior Member Join Date: Jun 2006 Posts: 541 Likes: 11 Liked 20 Times in 14 Posts	Re: Pressure reg for q-jet WOW that seems like alot 40 to 45lbs at the pump. Thanks for the reply.