|
|
Post by lizardracing on Apr 17, 2013 20:12:53 GMT -6
While sitting in the shop or staging my fuel pressure is rock steady 6psi on block mounted ProCam mechanical pump with deadhead style regulator. The pump is internally regulated at 7psi. My regulator is set to 6psi. On the track at under caution it bounces around 4-7psi making my warning light flicker at 4psi. At speed its much better but still bouncing between 5-6. I have no performance problems to speak of but I didn't have this issue until changing to this pump from a Edelbrock Mechanical Pump early last year. Anyone else have the same problem? What did you do to fix it?
|
|
|
|
Post by Admin on Apr 18, 2013 6:32:14 GMT -6
could be boiling the gas
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 19, 2013 8:22:33 GMT -6
Was your Edelbrock pump a 7-8 psi pump or a 15 psi pump? Do you have a bypass? I thought you only needed a regulator if you ran a 15psi pump. I run a CV Billet pump straight to the carb, no regulator and have no pressure issues. I think you remove the regulator and you have no issues. I have two good friend, one builds Nascar engines for PME and one builds engines foe Mullins. I asked both when setting up my new motor about a regulator and return. They both told me a 7-8 psi pump, no regulator or return, so that's what I did.
Dave
|
|
|
|
Post by ctfarm2 on Apr 19, 2013 21:57:40 GMT -6
A 7psi pump does not need a regulator or a return.
|
|
|
|
Post by lizardracing on Apr 20, 2013 21:06:32 GMT -6
New pump is 7psi and old was 15psi. Regulator set to 6psi on both.
I'll take off the regulator and see what happens.
|
|
|
|
Post by lizardracing on Apr 23, 2013 10:41:30 GMT -6
For anyone interested and maybe considering a ProCam block mounted mechanical pump. I called Baker Engineering and talked to them about the requirements of their pumps. According to Baker Engineering the 7.5psi pump doesn't need a regulator at all. One can be used if one wants to but in Baker Engineering's opinion that's unnecessarily complicating a system. The 11psi and 15psi pumps require regulators and the 15psi requires a bypass in most cases. They offer a spring sold separately for E85 applications that raises pressure to 8.5psi. There some incorrect info out on the internet about the pumps being rated at WOT and idle pressure could be as high as 11 pounds on the 7.5psi version. This is incorrect. WOT doesn't equate to RPM in all cases nor does "not requiring a regulator" equate with 11psi idle pressure as being normal on the 7.5 versions because of the rating tests.
Flow(usually measured in lbs/hr for automotive purposes) is a better indicator but pressure is the much simpler and convenient way to get a rough idea that your engine has enough fuel to support it's requirements. I
I hope this clears up some misinformation on the internet for someone using or considering this brand of pump
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Apr 23, 2013 11:10:10 GMT -6
So you removed the regulator and problem solved?
|
|
|
|
Post by lizardracing on Apr 23, 2013 21:19:26 GMT -6
Don't know yet. We have been rained out 5 weeks in a row.
|
|
|
|
Post by flipflopoo1oo on Mar 4, 2014 12:41:45 GMT -6
Rain outs are sad and had 11 in a row one year with 5 more straight after that! We couldn't even get out of state and stay dry! As for fuel pump pressure it is more about volume and how much feed to need the bowls full! If I ran 4-5 pounds with a return jetted regulator, my fuel stayed cooler and produced more horses plus another tid-bit from less drag and I even went so far as to gear it down for more! I did have to use high volume fitting and drill my carb fittings And as always reset floats per pressure change. A high idle was used as well to keep the 4lbs. I wanted it all bad back then and now you have to buy your own horses off of a dyno ranch!
|
|
