Hey guys a few questions 1 What is the best UD pulley to buy as in the brand ? 2 Also what power increase should I expect it is for a TTZ32 ? 3 How much will this affect the cooling system as in the water pump/speed and is there any other negative affects this modd will have on my Z 4 Should I consider a water pump overdrive pulley ? 5 Should I look at getting a whole set of pulleys for the other pulley driven components Can I also please have some feed back on this part such as what you think of it/is it worth it/ect Many thanks mike:biggrin:
Harmonically dampened: ATI/Fischer Unharmonically dampened: Unorthodox Racing, GFB, ASP all good. 20hp Some people have seen variations of 6-7 degrees in coolant temperature by switching to UDP. This will also affect the A/C, Alternator, and Power steering, but the differences will probably not be noticable Probably. It's not necessary if your cooling system is in good condition, but the temps will be higher. 5 Should I look at getting a whole set of pulleys for the other pulley driven components Depends. No real power gains to be had ~2-3hp. For bling.. maybe? It's a good mod. I like it. No real evidence for one being the cause of engine failure. Many thousands around the world installed on Z32's. Personally, I'd like a Ultra Sc Unorthodox Racing pulley, but they don't exist unless we have 40 people to get a custom order. :zlove:
Thanks alot mate I might have to join up to your GB Any other opinions people LOL thanks mike :biggrin:
would be good if you join...both for you and us... why... it will be cheaper both on parts and that there is supposed to be no temp increases with the one from zductive plus as he said, women may lust you....
Soz I already purchased one of another member as I wanted one strait away but thanks any way much appreciated mike
Plenty of evidence Depends if one wants to see it or hear it though. Ask any decent engine shop or performance shop that knows what they are doing. If you go by forum evidence then you can find evidence that black is white if not grey at least. Plenty of people inlcuding on this forum have actually noticed vibration when fitting the non harmonic balancer one peice alloy pulley. If you are going to use a one piece alloy pulley then guess what is is doing to the bearings in the motor. If you are going to use a alloy pulley then at least get it balanced as we have found they are all out of balance by a fair bit. It is true though many thousands sold and most get away with it without any problems. I know of a few big hp motors that had issues. The minimal gain in less rotating mass is lost in power robbing vibration and potential damage over time to bearings. Better off getting a lighter tailshaft or flywheel. Has anyone actually done a before and after dyno run? See the balancing marks on the alloy pulley on the left and factory one on right.
Thanks John.. ..nice to see some 'balanced' replies. (Pun intended) You've probably saved some junior Zedders "moi' " some money. What are good brands for lightweight flywheel and single piece tailshaft in my good old NA ?? How much power gain?? (spose it's like asking how long is a piece of string!)
Power gains Unknown power gains but would be something. I don't know weights of NA but twin turbo tail shaft is a little over 14kg and one piece around 9.5kg or bit more with stronger uni joints, so nearly as much as going for the one piece alloy under drive pulley, which look good but? Flywheel stock cast iron unit with ring gear are around 10kg from memory and can get Chrome Molly one piece with ring gear in one 4.8kg. You can also get lighter cam gears and engine pullies and even diff. If you want looks and lighter whilst retaining resonance absorptions then the UAS under driven harmonic balanced light weight pulley is an option. It is not as light as the alloy one piece ones but absorb resonance and are much better balanced also. They are also ANDRA approved and in fact required for cars running less than 11seconds 1/4 mile. In relation to the wieght issue, the engine requires some weight at the end of the crank to balance and absorb resonance. ATI make two types of balancers and one is rated around 600hp and one for 1000hp which is the heavier and for good reason. We looked at the ATI ones which are good but the ones Ross Balancers made for us are a better design. We also know after testing quite a few that they are within less than a gram off balance and do not need servicing unlike the ATI ones.
Group buy on the ATI ones? I'd be interested in that, I think there was one already run but bit late for me.
I got a generic one Revspeed i believe its called, $100 from memory back in the day, cheap and a good mod
Why not the unorthodox Racing 300ZX Pulley Set (4pc) with Belts? Its $400usd so around $500aud delivered, comes with new belts, comes with crank, alt, water pump, and power steer pulleys Thats what i am doing anyway :zlove:
Dampening The UR ones dont have any of the dampening or vibration absorbing material. e.g. they are no different to the GFB or similair cept they have blingy replacements for the accesories.
does that mean you will get double gains from a UD pulley and lighter flywheel/tailshaft? whats the best bang for buck stuff....im hoping to go around 250rwkw-300rwkw...obviously 3" dump, highflow cats, x-pipe, intercooler, twin pod 14-16psi and tuned with socketed ecu...what esle can be done to get these figures and is there any benifits of getting an aftermarket ecu?
WOW dident know that so if i get my ud puley ballenced will I be ok to use as in will it create wear on my engine/bearings I have purchased a ud pulley but I can allways chuk it coz it hasen been fitted yet. Should I chuk it amd look at a propper ud pulley ? This is what I purchased but from a fourum member who never yoused it http://www.importpartspro.com/aspni30unpu.html A reply would be much appreciated many many thanks from me and my engine LOL
I had one similair And had no problems, but now that i'm going for big power and putting more stress on the engine in doing so i'm looking at the UAS style one. However the price is what puts me off, $600 is a bit expensive for the pulley, if it were around the $450 mark like the group buy i'd be there.
Benefits IBBI. Yes there are benefits in after market computer but if you can get a custom chip tune which we now do then good. Plug in generic chips in my opinion are a waste of time and money potentially dangerous. Clayman the cost is up there due to Aussie labour and manufacturing process and a lot more than a one piece alloy pulley. If you don't want to spend the money leave the factory one which also require balancing, especially if going for big power. WLDTTZ it is better if an alloy one is balanced but it will still damage the bearings long term with questionable actual gains. For those wondering or questioning this well founded basic mechanics, you only have to go to the Skyline camp as ALL GTR's that were fitted in the past with under drive pulley's had bearing failure, and quite quickly. The RB engine having a longer crank compared to short V6 is more prone to harmonics or resonance from the crank. Plus another fact is that some people after fitting a light alloy under driven pulley on zed's actually notice the vibration, and some just can't notice it.
Thanks alot unique Z much appreciated! So any interested i purchasing a asp under drive pulley AHHAH LOL since I dont want one any more not any sort of udp after reading this my engine gets worked to hard I basicly bought the car for a thrasher as in hills runs and stuff and with my style of driving I dont belive my engine would last long with a udp. One last question I have read above but did not quite understand,so basicly if I purchase one of those $400 ones pictured above or the one from seductive group buy I wil be ok no long term damage or quiker engine wear? Once again thank you all very much
Zductiv's group buy Was for Unorthodox pulleys, they are no different to the GFB or ASP in terms of being just a solid chunk of metal with no dampening. They do look pretty though
UAS Pulley Any chance we could get it knocked down a bit if we had a few buyers? Not sure if there are many people after them at the moment but can't hurt to try.
