poping on the top end
#1
Senior Member
MASTER BUILDER
Thread Starter
Join Date: Feb 2007
Location: Sweethome, OR
Posts: 133
poping on the top end
I have a 350 sbc with a 671 blower gear drive when I get on it on the top it starts poping and missing lose power but I have to put the power to it whent this happens other wise it runs fine. We pulled the valve covers off and no broken springs there dose not seem to be any bent rods I even changed to plugs can anyone help.
Thank you
CPT.RON
Thank you
CPT.RON
#2
Senior Member
RACING JUNKIE
Join Date: Jun 2003
Location: Hobbs, NM
Posts: 842
Re: poping on the top end
Originally Posted by rsrsfishslayers
I have a 350 sbc with a 671 blower gear drive when I get on it on the top it starts poping and missing lose power but I have to put the power to it whent this happens other wise it runs fine. We pulled the valve covers off and no broken springs there dose not seem to be any bent rods I even changed to plugs can anyone help.
Thank you
CPT.RON
Thank you
CPT.RON
#4
Senior Member
MASTER BUILDER
Thread Starter
Join Date: Feb 2007
Location: Sweethome, OR
Posts: 133
Just a stock fuel pump was running ok never had it pop before but I reved it up while at a loud pip contest but I think it started before that I have not done anything drifrent to the car or motor
CPT.RON
CPT.RON
#5
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Couple of things could cause it for sure, since it's a stock pump, i doubt if it's too fat, it would normally be a lean pop, and still could be, if you hit the throttle and it stops that might be because you opening the accelerator pump giving it more gas. The other thing is the distributor may have moved, and retarded a little bit.
JMO
Zip.
JMO
Zip.
#6
Senior Member
EXPERT BUILDER
Join Date: Jun 2005
Location: potash country
Posts: 262
My Altered did the same thing. I run a Enderle methanol injected 434sbc but with no supercharger,just a tunnel ram. It always runs great but when I added nitrous it started popping on the top end. I never added any extra fuel when I installed the nitrous,I just added a single spray bar in the tunnel ram with a 100hp jet and about the 1100ft mark she started popping. To me it was running lean. So maybe your engine is running lean also.
Just a thought.
Just a thought.