Circle track dirt car problem
07-12-2010, 05:13 PM
#1
Member
JUNIOR BUILDER
Thread Starter
Join Date: Sep 2003
Location: Watsontown Pa.
Posts: 73
Circle track dirt car problem
I have a 355 with a holley 4412. When I get in the throttle coming off the turns, the engine bogs slightly and then comes back. This is all the way down the straights. Fine in the corners because of feathering. I have changed everything electrical in the car including complete wiring of the entire car. There is not an electrical component that I haven't changed. So now i am leaning on fuel delivery. I tried a Rochester carb and had the same problem. I have a racing fuel pump (can't tell ya the name right now). Any ideas where to go from here???
07-12-2010, 11:59 PM
#2
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Posts: 4,137
Is your fuel pump good or is 100 years old? Also the fact that it does it with both carbs makes ya think it isn't geting enough fuel to the carb for some reason. Restricted fuel line faulty pump etc. I assume the float level is correct.
If you are allowed maybe put a fuel pressure gauge with an isolator , so you can watch the fuel pressure while you are running it.That would tell you if it was the carb or the fuel system.
If you are allowed maybe put a fuel pressure gauge with an isolator , so you can watch the fuel pressure while you are running it.That would tell you if it was the carb or the fuel system.
07-13-2010, 04:50 PM
#5
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JUNIOR BUILDER
Thread Starter
Join Date: Sep 2003
Location: Watsontown Pa.
Posts: 73
Well, you guys are all on the same thought pattern I am in regards to fuel pressure. Fuel pump is quite old. I didn't quite understand the post that said "most fuel problems is the ignition!!!!". The foam is as old as the fuel cell itself which is as old as the car and that is at least 10-12 years or more. I am going to start unhooking lines tomorrow and watch for flow. I also wonder about the fuel cap and the bleed valve. I will let ya know if I find it. Bad thing is, I never know until I get to the track and I loose money every time because of it.
07-13-2010, 05:08 PM
#6
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RACING JUNKIE
Join Date: Aug 2007
Posts: 1,523
Fuel cell foam should be replaced every couple years according to the website below.
http://www.atlinc.com/faqs_racing.html
http://www.atlinc.com/faqs_racing.html
07-14-2010, 07:00 AM
#8
Senior Member
RACING JUNKIE
Join Date: Mar 2008
Location: Emmett, Idaho
Posts: 7,334
That old of foam will require replacement !! You'll need to purge the COMPLETE fuel system. Remove the cell foam, the cell and clean, and blow out all your lines, filter/s, pickup screen, etc.
Even IF that does not fix the original issue, IT NEEDS TO BE DONE.
Even IF that does not fix the original issue, IT NEEDS TO BE DONE.
