Guest laz Posted February 6, 2007 Share Posted February 6, 2007 hello.... just fitted some alloy underdrive pulleys to the old soop, did not think i would notice much of a difference! but i was wrong! ......where the n/a has a bit of a flat spot between gears, that is now gone and the pick up is quicker... i weighed the pulleys before fitting and again with the old steel ones, so far i`ve took out 2kg of rotating mass and i have still to fit the crank pulley yet which will be another 2kg off.....i would say it is a great mod for any soop, a must have for the n/a owners........im now looking at getting rid of the heavy old fan for some knlowes free up some more power regards laz n/a decated ss exhaust custom 100mm intake k&n alloy engine pulleys 18" split rim chrome alloys Quote Link to comment Share on other sites More sharing options...
Bob Posted February 6, 2007 Share Posted February 6, 2007 Undampened ebay crank pulley, by any chance? Be interesting to see how long the engine lasts. Quote Link to comment Share on other sites More sharing options...
Gamer Posted February 6, 2007 Share Posted February 6, 2007 Who cares it's an n/a Just kidding, I seem to remember him saying that he was aware of the possible drawbacks. So at least he knows what to expect. Quote Link to comment Share on other sites More sharing options...
Ric Posted February 6, 2007 Share Posted February 6, 2007 Undampened ebay crank pulley, by any chance? Be interesting to see how long the engine lasts. Why? the boostlogic ones arnt dampened? Quote Link to comment Share on other sites More sharing options...
Gamer Posted February 6, 2007 Share Posted February 6, 2007 Why? the boostlogic ones arnt dampened? You are mistaken mate, the BL ones are dampened and SFI approved. http://boostlogic.com/parts/supra/info_supra_Damper.html http://www.sfifoundation.com/ Quote Link to comment Share on other sites More sharing options...
Ric Posted February 6, 2007 Share Posted February 6, 2007 ah right hence the ?'s wasnt sure Quote Link to comment Share on other sites More sharing options...
Guest laz Posted February 6, 2007 Share Posted February 6, 2007 good job the crank bolt did not undo then, i will put that back on ebay or use it as a paper weight lol..... looks like a boost logic pulley is the way foward then!!! the other pulleys are ok and line up perfectly, that was my main worry....what about kenlowe fans ,anybody got them fitted???? Quote Link to comment Share on other sites More sharing options...
Digsy Posted February 7, 2007 Share Posted February 7, 2007 You're happy with running your water pump slower than intended then? Quote Link to comment Share on other sites More sharing options...
Daston Posted February 7, 2007 Share Posted February 7, 2007 why would the water pump run slower?? As the cercumfrance (how do you spell that?) would be the same. Quote Link to comment Share on other sites More sharing options...
Bob Posted February 7, 2007 Share Posted February 7, 2007 cercumfrance (how do you spell that?) circumference Though if they're true underdrive pulleys, the circumference won't be the same, as they work by, well, under-driving everything Quote Link to comment Share on other sites More sharing options...
Gadget Posted February 7, 2007 Share Posted February 7, 2007 I had a set fitted for my N/A bout 3-4 months ago, runs a hell of alot smoother, no flat spots and no problems. Although I spent over £200 on a full set of all 4 from http://www.cdfracing.co.uk/. Perfect mod for any big engined car in my opinion! Quote Link to comment Share on other sites More sharing options...
Bob Posted February 7, 2007 Share Posted February 7, 2007 Call me an old cynic, but I think Toyota may have had a better idea of what they were doing than a bloke in his shed with a cnc machine (ebay tat ones) The CDF ones should be fine though, as they're just lighter rather than smaller. Wouldn't bother with the undampened crank pulley though - for the 2-3bhp it may free up, it's not worth the risk imho. Quote Link to comment Share on other sites More sharing options...
rick001 Posted February 7, 2007 Share Posted February 7, 2007 Oh effin hell!! Just bought 1 off e-bay to swap mine as it may be squeeking itself to destruction. Anyone have a "Stock" pulley i could buy please... Rick Quote Link to comment Share on other sites More sharing options...
Bob Posted February 7, 2007 Share Posted February 7, 2007 On the bright side, the ebay crank pulley won't come apart Rest of the block might, but the pulley should be fine Quote Link to comment Share on other sites More sharing options...
rick001 Posted February 7, 2007 Share Posted February 7, 2007 On the bright side, the ebay crank pulley won't come apart Rest of the block might, but the pulley should be fine Hiya Bob, whats the issue with them then? why would the block give out? Just trying to gain some info cheers Quote Link to comment Share on other sites More sharing options...
Daston Posted February 7, 2007 Share Posted February 7, 2007 circumference Though if they're true underdrive pulleys, the circumference won't be the same, as they work by, well, under-driving everything thats the baby!! ah I see sorry I thought you ment using a BL crank pulley Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 7, 2007 Share Posted February 7, 2007 The ad says "inertia weight dampening". This sounds like advertising department speak for it's a heavy lump of metal, but not as heavy as Toyotas effort. The stock one is a tuned resonance elastomer damped unit. I *suspect* these aren't, and from the photos I am pretty sure I am right. The way they differ is very relevant to how they will perform. Anyone asked the relevant question? Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 7, 2007 Share Posted February 7, 2007 Hiya Bob, whats the issue with them then? why would the block give out? Just trying to gain some info cheers Every time someone says crank pulley it turns into a hotlink to a page on here that tells you everything you wanted to know (and quite a lot you didn't) about crank pulleys. Especially the bit about how they stop crank flexing and stuff. -Ian Quote Link to comment Share on other sites More sharing options...
Scooter Posted February 7, 2007 Share Posted February 7, 2007 You're happy with running your water pump slower than intended then? if he's still got his stock crank pulley and fitted a smaller water pump pulley won't his pump be made to run faster not slower? Quote Link to comment Share on other sites More sharing options...
Gadget Posted February 7, 2007 Share Posted February 7, 2007 Oh effin hell!! Just bought 1 off e-bay to swap mine as it may be squeeking itself to destruction. Anyone have a "Stock" pulley i could buy please... Rick I still have all the stock ones if you want them, open to offers on it. Postage may be a little bit due to weight but not to much. Don't know what their worth. I'll post pictures when the camera is charged Quote Link to comment Share on other sites More sharing options...
Digsy Posted February 7, 2007 Share Posted February 7, 2007 if he's still got his stock crank pulley and fitted a smaller water pump pulley won't his pump be made to run faster not slower? Yes, it will. So, do underdrive pulley sets work by replacing the stockers by same diameter ali pulleys and a smaller crank pulley, or by replacing all the pulleys with larger ones and keeping the crank pulley the same? Quote Link to comment Share on other sites More sharing options...
Konrad Posted February 7, 2007 Share Posted February 7, 2007 You are mistaken mate, the BL ones are dampened and SFI approved. http://boostlogic.com/parts/supra/info_supra_Damper.html http://www.sfifoundation.com/ Boostlogic one sounds like a good one, it is not THAT expensive too, considering how much mess can faulty make 200 pounds Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 7, 2007 Share Posted February 7, 2007 What alloy accessory pulleys are reccomended then folks? Not underdrive, just a bit lighter maybe....and also, not the crank pully, ill leave that alone for just now Quote Link to comment Share on other sites More sharing options...
Scooter Posted February 7, 2007 Share Posted February 7, 2007 Yes, it will. So, do underdrive pulley sets work by replacing the stockers by same diameter ali pulleys and a smaller crank pulley, or by replacing all the pulleys with larger ones and keeping the crank pulley the same? not sure..........it all seems like a lot of faffing around for not very much gain to me..........but they do look bling! Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 7, 2007 Share Posted February 7, 2007 An underdrive pulley set has a smaller crank pulley and the same sized accessory pulleys. This makes the accessories turn slower compared to stock. They are made out of aluminium, so yes, they are lighter, they look nice, but as to what benefit they actually provide? Not a lot And the link to the crank pulley FAQ entry should put you off a solid undampened one. It did me. I've got the lightweight accessory pulleys though because they are a shiny blue -Ian Quote Link to comment Share on other sites More sharing options...
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