Tech Department Project Cars FM Store FMWire ReadersCars Feature Cars Forums Log in About FordMuscle
pix
FordMuscle WebMagazine - Home
FordMuscle Home
FordMuscle Login
Subscribe
View Single Post
05-17-2008, 05:16 AM   #7 (permalink)
mavman
 
Join Date: Jun 2001
Posts: 4,392
Re: Question for mavman and others

This thread is getting interesting. LOL

Back on topic. I cant' afford dyno time, nor do I have even have a day off during the week to make it happen. I tune for the highest MPH and most consistent ET. Most of my junkers (and if you guys have seen my stuff, you pretty much know where I come from when I say "junkers") all run very little timing. Simply put, I will use the trial and error method. Start at 32. Go to 34. Usually it will drop MPH drastically. Then back to 30. MPH comes back normally, then down to 28...26. MPH and ET usually don't change until I get down to about 27-28 deg. That's on my Maverick, the Mustang is slightly different. It "likes" about 30. It will run just fine at 32 but I run them a little bit conservative.. Keep in mind we're bracket racing and not chasing ever last hundredth. I do the same thing with jetting. I have an LM1 in the Maverick. Great tool. I'm logging RPM and A/F as of right now. I learned that running slightly on the rich side works best for consistency when running methanol. And I also learned that the RPM function with the LM1 isn't accurate. Mine shows that I shift at 10,200 and cross the finish line around 10,400. Tach shows shift point at 7300 and stripe at 7400. And yes that's a windsor..414". It works well. Best ET on that combo to date is 5.82 and at 120 MPH.

Trial and error is the only way to tune if you can't do it on a chassis dyno like me. Dont forget there is more to tuning a car than just the motor. You have shock settings which are important. You have stall speeds, launch RPM, how deep you go into the beams plays a role in your ET's, and a hundred other things. When I was gunning for my personal best, I staged shallow...VERY shallow, the bottom bulb was flickering slightly when I pulled in. Launched at 2000 RPM, had a crap light but it was just off of idle and let the converter flash to 5800. 60' time was 1.29 and some change...almost a 1.300. I will say, however, that your RPM intake is holding you back just a little. A victor Jr is probably worth a little ET, but your MPH should increase quite a bit with it. Probably 3-5 mph if I had to guess. Most windsors especially our stroker windsors that have any balls can use the victor Jr just fine without losing much low end. Cant say that much for a 302 Victor JR....those need to be on a pretty serious motor because of their tiny short runners. You could also probably use a little more carb on that dual plane intake--but it should work great on a Jr. I could be wrong but that's always been my experience, FWIW.
______________________________________
record breaking '75 Maverick bracket car 2 time track champion, '84 Mustang LX bracket car, '78 Fairmont Futura, '86 Merkur XR4Ti, '95 F250 PSD, 00 F150, '03 SVT Lightning (DSG) #888
mavman is offline   Reply With Quote
 
pixblue
Flowmaster Mufflers
Fidanza clutches for Fords
AirFlowResearch Heads

All content © FordMuscle, LLC. | Ford® is a registered trademark of the Ford Motor Company. | FordMuscle.com is not affiliated with the Ford Motor Company.