After reading and changing plugs, playing with the timing a bit I thought the motor was running pretty good. Typically I run 92 octane pump gas and it was gettin low so I ran into town and put 5 gallons of Sunoco purple in it (110 octane) Wow what a difference, the motor really likes the octane boost, so much so you can feel it. I'm gonna post before and after plug pics, pretty BIG difference.
My feelings is if a person is running alot of timing and is above a 9.5:1 compression ratio, then that motor needs upwards of 93 octane. I have 3 cars with those needs. Sure is expensive filling them up nowadays. dan
i'm running about 11-1 compression. i use vp-110. costs me $5 a gallon. what is the purple running you?
4 bucks a gallon Don...here's the pic...not a good one, but you can tell it really likes the purple...like I said...it does ok on 92...but...GRRRRR on 110...I'm running 10.75 to 1...these are autolite 3933 racing plugs.
definitely a big difference. i'm using autolite AR3910's. the altitude is a little higher here in phoenix, than in bakersfield, so i'm thinking i might be right on. if not i'll throw a couple of bigger jets in it.
Bully- The smell is the best part! I was bummed at the end of race season when I got the car home and started running 92 in it again. (no 93 up here for some reason)
Well I'm back from the track and the best I could pull tonight was a 7.9 ET... I was feeeling a little bummed about it until I started talking to a guy parked next to me in the pits. He's running an 83 notchback Mustang and turning times just a tad slower than me and there's nothing really special about his build. I'm perplexed until he tells me how much his car weighs 2300 FREAKIN LBS..wet...with him in it I'm like good greif no wonder...my car weighs 3255 lbs with me in it wet. I did some calculating...if my car weighed 2300 lbs with my engine in it, it would do a 7.09 at 98 mph. I never realized just how MUCH a role weight played until tonight. I don't even know if you can get a Mavericks weight down to 2300 lbs without gutting it. Not that I would...but it is thought provoking. Ray we can only get 92 octane here to... Talk about sweet...John Ford had given me some grape additive at the roundup and I waited until tonight to put it in....YUMMY...lol
Thats a good et at that weight....weight is a huge factor in.....know that you know that there is ways of losing some weight without gutting,.......I am just not sure how and definitely.......I think advance timing falls under the same rule of thumb as compression....the more you have the more octane you need
i don't know what you have already done, but you can move the battery to the trunk, aluminum heads, aluminum radiator, lighter weight wheels, skinny tires on the front, fiberglass hood, smaller bumpers, remove the rear seat on track days, aftermarket bucket seats. they say every 100 pounds is a tenth of a sec. i could probably gain a tenth by going on a diet alone. it just comes down to what your willing to do. my car is about 2700. some on here say they are a lot lighter. remember if you bracket race the goal is consistency, not speed.
Thats what I've heard... a 10th for every 100 lbs. And your right... consistency is best for bracket.... but going fast AND consistency is even better I think my comet would coast thru the 1/4 in about 1 1/2 minutes at the moment... if i pushed it w/ the 4 wheeler (haha motor rebuild time)
Im with you Don...I could definitely drop a tenth by losing a 100lbs...lord know I got it to lose. Battery to the trunk and aluminium radiator are in the near future but mainly for cosmetics. If anything I've added weight over the factory rating with the 302 and 9" rear end. If I wanted to lower my ET's without making it lighter a little more cam and a taller gear would go a long way but I like it's cruising ability the way it is. With the new valve body the 2nd-3rd shift point is right at 100 mph and while my ET's stayed the same my mph went from 86.2 to 88.5. I think it would run a stronger 1/4 than it does the 1/8th. I could be totally wrong...thats just the feel I get.
your probably right Rick.......these little small blocks like rpm's....especially depending on your combo....cam, heads, intake and so on it could really like the higher rpm....I know my motor will climb higher than I will let it.....there might be a little more in my motor, but I will not push it to find out.
