Technical > Matt Shaff's Engine Shop
Spark Plug indexing
George:
--- Quote from: masracingtd1167 on March 20, 2013, 08:44:29 AM ---George it may not be too rich . How hot are you getting it? and how much dose the temp increase durring a run?
--- End quote ---
I have a themocouple in just one cylinder and it will only give me the high temp. So after 1/8 mile run I see 1000-1100F. I have seen hotter temps BUT it may have been caused by alky burning in the upswept zoomie.
masracingtd1167:
George I have never had much luck using E.G.T's for tuning mine . Like you said fuel burning in the pipe can cause high readings even if it is too rich . We were getting milky oil and thought that we were too rich and went slower and still had milky oil! I wasn't paying much attention to engine temp we would warm the car in the pit's and tow it to the lanes . One day I looked at the temp guage at the end of a run and it was only 140 degree's ! We started driving the car to the lanes to build heat in the motor and it worked well for us . I try to stage at around 160 to170 degree's and at the end of the track it's around 180 and bingo no more milky oil . If you are going 1.06 at the sixty ft. that is really good and 5.08 at the 1/8 you can't be too far off on your tune up . Sound's like 7 second potential too me! If you have some time read some of the articles that Spud Miller has posted on this forum .Very interesting stuff ! Good luck with your racing this year . and post some pictures of your car !
George:
I may try bringing the car up to the staging lanes with the engine running. It's for sure the engine runs better with a good heat soak. I installed a heater in the oil pan and made thermocouples for both the transmission and engine oil. They are installed in the drain plug locations. Before we start the car , I try and get the oil warm and turn the engine over with the block mounted starter . I crank the engine wo/ ignition until the oil pressure comes up. I have helped with a car running a dry sump and I think that's the ticket for pre-warming the oil and getting it circulated without starting the engine.
Oh, do you run coolant in the engine? We do not.
Thanks for your input. George
ricardo1967:
Great discussions guys!
masracingtd1167:
Thank's Ricardo This forum is a great place for us to share information with each other . Most of the other forum's like Bracket Talk and Yellow Bullet are not really geared for what we do . Racing a F.E.D. is much different than a R.E.D. After seeing what George is going on his 60ft's I am thinking about going back to those 12x31 Goodyear's if I can get a set.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version