hey i bought this morning some power & amp pulleys from march im installing them in the weekend so i will post it up if i felt any diffrence should i?because it tells me quicker trothle better fuel economy and 12 ponies to the wheels is this true?

 

Not really, maybe quicker throttle response but nothing else noticeable .. cept they look better.

 

this is hotly debated.

CHP did a test (i think it was chp ) and found 17hp with the 3 peice march pulley system. other here say there was no gain.

i am pretty big into the Z32 (300zx) stuff, and underdrive pulleys are at the top of the mod list for those car, the results there are unbeleivable. with many dyno tests to prove the merrits of uderdriving.

i am doing some dyno runs and tuning this january, i am very much considering getting a set of pulleys and doing back to back dyno testing, to see if there is any merrit to it. from the noticable gains i felt from the lightwieght flywheel and LS1 driveshaft i did. i am pretty sure there is quite a bit of loss in the rotating mass on our cars. the accessory drag in my mind would be a considerable factor in this. i am not going to toss out the idea that underdrives could gain a few ponies. 17hp seems rather high to me, but shoot if you get 10 HP, for what $59.00 or whatever a set runs, that is a pretty descent HP:$ ratio.

 

I think they do help. I was making 255 ft/lb and 155 HP with only the March Power and Amp pulleys, flowmaster and an injector spacer as clear cut mods.

An engine pulling its flywheel factory rated torque at the rear wheels in my opinion says something was gained from those little mods.

I don't think you'd gain much on the horsepower, rather you would benefit on the torque front as all those accessories are not robbing as much torque as before.

 

i just recently sold my z32... and i had the asp aluminum pulley and it made an unbeleivable diff... and that test that showed 17 hp was not march they were jet pulleys i looked it up last week or the week b4. so dewey do you currently own a z...??? i have owned dos and my brother has owned 3...

 

no i don't currently, i had a 280Z and 91 TT. they are very fun cars, but unfortinatly i cannot afford the insurance on a z32, the camaro, and my audi. so the camaro is the only toy for right now. if i could swing the insurance payments on both, i would have another Z car in a heartbeat.

 

hey guys. Will the pully's effect emissions in any ways? it' probably wont pass the visual part of the smog test but. are those pullys 50 state legal? well.. if it's legal in california, it's legal everywhere else. just wondering because i'd want to do that also to my car.

 

my pulleys don't affect the emissions i think... but i removed the smog pump and i guess that will affect the emmisions... oops...


i got rid of the z because it had no back seat and the parts were all close to 300 bucks... or more. it was a 90 and it had already went through 3 clutches b4 i bought it and then i had to add one and that one only lasted 2 years, i sold it to my friend in fl and he bought a new clutch for it... i had mine up to stage 5 on the stillen chart. the sgp chart was a stage for i think... i can't remember for sure. they had a real nice non turbo. it was the only z32 to win the gold medalion award( best z car of the year award) it was real nice!!!!! my 87 z31 looked better than my 32. it was black and the paint looked like it just rolled off the line!!!

 

im going to install them today and i post at night what i got from them company said u do get hp to the wheels and quicker trotthle response and u save gas

 

i just instslled them and i felt quicker trothle but no hp gains

 

As I stated earlier, you free torque but gain little on the horsepower front. a 305 TBI is limited greatly by its intake/exhaust system so much that it will make little difference to HP peak. The gain though may show up on dyno as increased torque throughout the rpm range and a slight increase in hp across the hp range.

So for example, at 2500 rpm where you are not as exhaust/intake restricted, a gain of torque and hp would appear.

 

well thanks alot guys and my amps work perfect with a/c on radia harzards long beams everything on it chages perfect well i hope i gain something from it except the quicker throthle