Posted By: Blucuda413
Gear Drive VS Belt Drive - 01/09/11 07:24 PM
Building a 528 14-71 blown hemi. Which is best to use in this situation a gear or belt drive?? I've had very good service out of gear drives in my swmallblocks. Hemi will not be a street engine but will not be max'd out either.
Posted By: tubtar
Re: Gear Drive VS Belt Drive - 01/09/11 07:28 PM
Sounds suspiciously like a TA/D arrangement.
What do they like ?
I am no authority , but think the gear makes more sense based the layout.
Chucking the big belt could make things worse with an open belt drive and I am not aware of a closed one for a Hemi.
Posted By: BeEtLeJuIcE !
Re: Gear Drive VS Belt Drive - 01/09/11 07:38 PM
A gear drive will transmit harmonics UP TO the valve train ....a belt will not.
If $$$ are not an issue ..I would go with a belt.
Posted By: chryco
Re: Gear Drive VS Belt Drive - 01/09/11 08:07 PM
Belts break/stretch.... gears don`t .
Rock ....Paper ....Scissors .......................
Posted By: bigtimeauto
Re: Gear Drive VS Belt Drive - 01/09/11 08:30 PM
When i put my blower on i took the cam belt drive off for safety. Blower belts can rip frey or whatever.
Posted By: Blucuda413
Re: Gear Drive VS Belt Drive - 01/10/11 12:24 AM
Cab, it is "NOT" going to be a street engine.
Posted By: moeflo
Re: Gear Drive VS Belt Drive - 01/10/11 02:44 AM
I've got an old Engine Masters mag around here somewhere. They tested the chains vs. belts, vs. gear drives. The gear drives were equal, or slightly better on the dyno. With magazine politics, I wouldn't bet the farm. But gear drives seem to be the standard on blown hemis. One less thing to worry about...
My point is that the gear drives make noise, the blowers make noise and some people, especially the street car people 
I have built several blown 426 Street Hemi, ran them on the engine dyno but not in the cars, one was a Motech EFI with a Littlefield stage 3 10:71 499 C.I. all alulmium KB block and the other was another stage 3 Littefield with a set of 1050 CFM Carb Shop blower domiator carbs,484 C.I. new iron mopar 426 block, both surged around 600 RPM hgh to low at idle at first until I tuned the surge out of them 
In that case go with the belt drive 
I have a Jesel on my 527 bracket motor, it wouldn't be hard to make a thin cover to keep debris out of the belt 
... to your knowledge of the situation .. 
