I wasn't aware that there were so many choices in engine blocks for top fuel. To date, I see there is the custom blocks made by DART for DSR, the BOSS 500 blocks for JFR and Tasca, TFX and BAE blocks. Are there any others?
AJPE Blocks
I must be getting old.
Back in my days, we had Cast Iron, Milodon, Donovan or Black.
Forgot about JP-1 blocks, but I have no idea if they are still manufactured...
Shannon,
I thought the TFX block, while originally a Rodeck design (not sure about this), is now manufactured by AJPE...
I can tell you from all my research all I have come across is TFX, BAE, AJ 500, and the Ford 500. I also come across teams in my research that have different displacements. Can someone explain the difference of the block and the possible dispacement differences? For example I've seen some TF teams have a TFX 500, TFX 496, TFX 498 on entry lists, same for displacement variances for BAE.
I can tell you from all my research all I have come across is TFX, BAE, AJ 500, and the Ford 500. I also come across teams in my research that have different displacements. Can someone explain the difference of the block and the possible dispacement differences? For example I've seen some TF teams have a TFX 500, TFX 496, TFX 498 on entry lists, same for displacement variances for BAE.
The stroke on the most of these motors, as far as I know, is 4.5 inches, and is called the "three quarters stroker", so named because it is three quarters of inch more stroke than the stock 426 HEMI stroke of 3.75 inches. There is also a 5/8 stroker, but I am not sure if that is used now-a-days.
The different displacements are due to different bore sizes. The 496 ci displacement has a bore size of approximately 4.1875 inches. Actually, the displacement is slightly less than 496 cubic inches, but it's close enough to call it 496 inches. I could work out for the bore size used in a 498ci and 500ci engine, but I am too lazy.
They are all now 4.187 X 4.500 = 495.7..... teams have a TFX 500, TFX 496, TFX 498 on entry lists.....
They are all now 4.187 X 4.500 = 495.7
The variances comes from the person filling out the entry form...
The rule limit is 500 ci ,so that's what some folks write down...
A few guys ran 4.250 X 4.375 = 496.5
One team ran 4.315 X 4.250 = 497.2
Thanks. So in theory forgive me because I know nothing about this other than a question, could a team find a way of getting bore and stroke coming out to exactly 500 or as close to end up having an edge? Can performance advantage now come down to bore and stroke as close to 500? I mean I have no idea what 4.3 cubic inches could mean to a dragster.
Certainly means nothing with a supercharged Nitro burning engine........ 4.3 cubic inches could mean to a dragster.....