would i benefit any from these.... this is probably like the only bolt on i havent done to my tpi engine.... can anyone give me a link to a good set....

 

#4410 March Performance Pulleys

I already have the water pump pulley (same size as stock pulley IIRC), and plan to buy the crank later on as I will not be using the alternator pulley, as I will be using an MSD Alternator with their smaller/larger pulley.

I believe these help out that tad bit, but nothing I can fact-fully say would be noticeable. I have read some gains can be found, so if this is like the last bolt ons you need, might as well go for it right.

 

the only problem with underdrive pullies is that if you make the crank pulley smaller and keep the same size alternator and waterpump pulley those accessories will be turning slower, you could get smaller pullies for all of them, or you could just get lighter pullies, i believe march sells billet aluminum pulleys that wieght less than half what the stock pullies weigh

 

I have March PN- 4010

Didn't notice any seat of the pants difference in power.... But I often have charging problems @ idle due to the larger alternator pulley. (The crank and water pulley's are smaller and the Alternator pulley is larger)

It's funny that you ask cause I was gonna put the smaller original Alternator pulley back on today.
The only problem that I see with doing that is that it may "over-spin" what the original RPM rating was for the bearings/bushings of the Alternator. I imagine that's why they went for the larger diameter pulley in the first place...... we'll see.

 

March's Water Pump Pulley is the exact same size as the stock pulley (But definitely lighter0. Also I shouldn't have any problems as I am going with an equivalent Alternator pulley through MSD.

Get the kit, and you'll be good to go.