The Thunder Tiger lower unit shown in both pictures has a spiral bevel gearset in the lower. Thats a big deal,, saves youGot a question,my 3.5 OB spins clockwise looking at the flywheel from the top,car/buggy motor's spin counter clockwise...whats the solution for that (other then running a RH prop)??? Or am i missing something here?
$189 is a good price,, I paid $205 at "ThunderTiger4U". Its important to remember, not just any motor is goingok better question...where do i get a TT lower unit? lol
EDIT: Never mind,hit ebay after i posted and found one,its headed to me now,price looked ok to me.
http://cgi.ebay.com/Thunder-Tiger-3-5cc-Pr...1QQcmdZViewItem
Well, You have to have access to a lathe, theres just no way of getting around that. At the very least a new headbuttonAwesome! Jerry,,how's the level of difficulty converting this powerhead?
how's the performance?..
i'm aware of the big difference between marine and car engine is that marine runs most of the time wide open in contrast to car engine,thus this thing really matter?
sorry for alot of q's...
thanks again
jul
The 30 took .020" sleeve shim and it would be better with .025" shim. The piston skirt will contact the TT pto so watch for that.A+ comments Jerry, I have a few extra buggy blocks here that i can setup for the TT backplate, Cutting/milling is NP here,have all tools in house, Thanks for your time and reply's..Makes my decision to get the TT OB feel more solid. Ill end up putting one of my Axial .32's or a OS .30 on it.
Well, You have to have access to a lathe, theres just no way of getting around that. At the very least a new headbuttonAwesome! Jerry,,how's the level of difficulty converting this powerhead?
how's the performance?..
i'm aware of the big difference between marine and car engine is that marine runs most of the time wide open in contrast to car engine,thus this thing really matter?
sorry for alot of q's...
thanks again
jul
can be made for the powerhead that comes on the Thunder Tiger O/B that was shown above by BB Mods.
Every other engine will require turning the TT pto on the lathe to fit up the ass of the new powerhead. The O.S. engines
I listed use their own head buttons but the VZ has to have it's crankpin drilled for a "press fit" pin to drive the TT pto,
as with most of the car/buggy engines.
That is some fine work and I would not recomend starting with an engine that requires the crankpin mod for a first try.
The Thunder Tiger BX-R w/pull start is a good one,(long stroke version) it's $124.95 and uses the Mac O/B headbutton
($25) slighty cut down (.002") to fit.
It will take .020" sleeve shim to get the ports up a little , which is a common mod with most car engines.
I usually cut the crank timing to about 214*and cut the exhaust port up to around 180* on my engines.
The result is a very fine running heat racing engine on a cut down X640 (38 to 38.5mm), good torque and rpm.
JW
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