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Author Topic:   dart, world or stock heads?
posted November 26, 2003 08:39 PM
Hi, we race a 3/8ths mile oval with medium banking and run a 383 small block with 350 gears in a 9" ford rearend. We are very competitive and do really well, with a few heat race wins for the year and some top main event finishes also. The only place we get beat on the track is coming out of the corners and on the starts. The cam and everything we are running is awesome as far as that goes. The engine runs great and is very strong all the way down the straight once out of the corners. We are running stock heads that I ported and polished myself and was thinking of trying the dart heads to pick it up coming out of the corners. Has anyone had experience with these that can relay some info as to if they will help us or not? Like I said it is strong as can be and we are on the brakes to stay off of their rearends going into the corners just need to get with them better coming out. It is almost $1000 to buy them so I am really wanting to know if I am throwing away my money to get them. We tried lower gears already but the enigne rpm was extreme and didn't seem to be the answer as we lost out on the other end of the straight that way. Is there really that much to gain from aftermarket heads at low rpm or should we look elsewhere for the answer? Thanks for your help.

posted November 26, 2003 08:56 PM
what are you running for a tranny? a gear change might be just what you need if you run a 9 inch you should always gear it so you can run in your high gear. thats why they are pulling you and you catch them at the end they reach there top end faster then you do. what kinda r's do you turn? and what size roll rear tires do you run?

posted November 26, 2003 11:35 PM
I love my pro toplines also, not sure if they will help you out of the corner or not.
I had 461's with the 2.02's and I noticed a difference everywhere.

I paid $730, assembled and shipped.

posted November 27, 2003 09:47 AM
i like the dart iron eagles. they are heavy but they go like **** . i noticed a big differance even going from sportsman 2s to iron eagles.


posted November 27, 2003 10:59 AM
Zero are you running the 49cc or the 64cc?


dan ferry
posted November 27, 2003 02:10 PM
racerguy i dont think your gonna get what your looking for out of heads what cam profile do u run and were is it degreed in at and what does manufacter call for as far as intake centerline method you are running into your power band too late when you changed gears that may have been too drastic depending on how far u went i think 30 numbers is about 400 rpm gain. you could try to advavce cam to pick up a little bottom end. first find out where the cam is degreed in at it may not be where u need it due to gear set crank or keyway ive had to advance mine just to get it where crower says to put it and ive had put a cam in at heads up on the marks and checked it and found it to be at 100degrees when comp wanted it at 106 threw the gearset away bought another one and at heads up was 105.5 close enough for me to start out with.they make gear sets that have 2 degree increments on the crank which makes it easier to fine tune. just some ideas you probably already know.

dan ferry
posted November 27, 2003 02:12 PM
and you also may want to make sure you dont have too much duration especially on exhaust this kills torque which you need