shaunjennifer21 Member 95 Member For: 13y 10m 7d Posted 08/05/12 02:13 AM Share Posted 08/05/12 02:13 AM Has anyone had any experience with these ? I know there's a light weight kit on eBay for 300. My belt and pulleys need replacing do if it's worth it I'll get the light weight kit Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/ Share on other sites More sharing options...
P_BA_XR6 Member 271 Member For: 16y 11m 8d Gender: Male Location: Castle Hill Posted 17/05/12 10:52 AM Share Posted 17/05/12 10:52 AM When I had my Na it made a great difference any weight off your crank will allow the engine to free spin more, so the engine will rev quicker, only bad thing is you lose low down pulling torque but I never noticed it, any weight of the pulley and flywheel will make the engine rev quicker. I think you would gain 10kw to 15 kw max, I have one I don't look back 1 Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1238881 Share on other sites More sharing options...
Kroozin Menace Donating Members 1,990 Member For: 14y 18d Gender: Male Location: Sydney Posted 17/05/12 11:06 AM Share Posted 17/05/12 11:06 AM youll find with turbos theres not really any gains to be had... I would think the cons would outway the pros on this one. Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1238893 Share on other sites More sharing options...
sexual harrassment panda I see a red door and I want to paint it black Donating Members 5,919 Member For: 15y 6m 14d Gender: Male Location: Far north queensland Posted 17/05/12 11:19 AM Share Posted 17/05/12 11:19 AM with kroozin Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1238904 Share on other sites More sharing options...
Ninka Donating Members 1,850 Member For: 22y 4m 16d Gender: Male Location: Perth, WA Posted 18/05/12 09:57 AM Share Posted 18/05/12 09:57 AM (edited) When I had my Na it made a great difference any weight off your crank will allow the engine to free spin more, so the engine will rev quicker, only bad thing is you lose low down pulling torque but I never noticed it, any weight of the pulley and flywheel will make the engine rev quicker. I think you would gain 10kw to 15 kw max, I have one I don't look backI would seriously doubt that any power increases will be seen from modifying the pulleys, certainly not from a weight reduction point of view, as plastic factory units are quite light already. Underdrive pulleys may provide a little gain by spinning your alternator and a/c slower, but only at the detriment of performance.As spinning energy is only a fraction of a fraction of the reciprocating energy lost by moving the rods and pistons up and down, there is nothing to be gained, except for the 'bling' factor, which is why I have red alu pulleys on my engine, nothing more, nothing less Edited 18/05/12 09:58 AM by Ninka Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1239398 Share on other sites More sharing options...
shaunjennifer21 Member 95 Member For: 13y 10m 7d Posted 14/06/12 08:47 AM Author Share Posted 14/06/12 08:47 AM ohk thanks , just I need to change my belt and a couple of the pulleys are a tad noisy that's all Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1254030 Share on other sites More sharing options...
XR6menace BANNED Banned 1,462 Member For: 18y 11d Gender: Not Telling Location: banned Posted 14/06/12 09:49 AM Share Posted 14/06/12 09:49 AM (edited) I would seriously doubt that any power increases will be seen from modifying the pulleys, certainly not from a weight reduction point of view, as plastic factory units are quite light already. Underdrive pulleys may provide a little gain by spinning your alternator and a/c slower, but only at the detriment of performance.This I agree with, but the std balancer weighs 4.2kgs and the Powerbond Underdrive weighs 2.8kgs FACT!I proved this years ago .. forget the underdrive hocus pocus and focus on 1.4kgs off the reciprical mass .. this is where the benefit comes from .I have fitted many and seen first hand PB's at Willowbank shortly after... Daz*EDIT* I cant find the video I wanted to back up my findings so this will have to suffice until I do... Edited 14/06/12 09:50 AM by XR6menace Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1254068 Share on other sites More sharing options...
Ninka Donating Members 1,850 Member For: 22y 4m 16d Gender: Male Location: Perth, WA Posted 14/06/12 10:20 AM Share Posted 14/06/12 10:20 AM (edited) Well, my impression was that we were talking about the PULLEYS and not the balancer.Altering the weight of the balancer can introduce a whole lot of other problems, especially on a straight six where the dampening of torsional crank stresses are critical, so though it may provide short term gain, just make sure it is suitable for the application, or you may end up with a broken crank.By the way, I added a billet flexplate for my last engine build, and its somewhat heavier than the flimsy Ford deal (I dont have the exact number), but engine came out more responsive on the other side of the build, so as a minumum, a couple of kilos makes negligable difference to responsiveness. Edited 14/06/12 10:22 AM by Ninka Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1254098 Share on other sites More sharing options...
XR6menace BANNED Banned 1,462 Member For: 18y 11d Gender: Not Telling Location: banned Posted 14/06/12 10:51 AM Share Posted 14/06/12 10:51 AM Just for the record NO customers have ever broken a crank and I have run a 200shot through my bottom end before No6 rod let go...The Underdrive has more than proven itself the Typhoon even picked up 7rwkws on the dyno and considering the Plazmaman cooler covers the whole radiator the temp never goes over a 1/4 with the 71* stat ...Lighweight pulleys made of alloy ?I misunderstood the question obviously the plastic parts weigh next to nothing BUT repco now sell metal pulleys as replacement... Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1254128 Share on other sites More sharing options...
Ninka Donating Members 1,850 Member For: 22y 4m 16d Gender: Male Location: Perth, WA Posted 14/06/12 11:39 AM Share Posted 14/06/12 11:39 AM Just for the record NO customers have ever broken a crank and I have run a 200shot through my bottom end before No6 rod let go...The Underdrive has more than proven itself the Typhoon even picked up 7rwkws on the dyno and considering the Plazmaman cooler covers the whole radiator the temp never goes over a 1/4 with the 71* stat ...Lighweight pulleys made of alloy ?I misunderstood the question obviously the plastic parts weigh next to nothing BUT repco now sell metal pulleys as replacement...Well, let's just agree that the original question has been addressed.I already posted and placed a picture of the Repco pulleys elsewhere, so let's not make this an argument over balancers and their relative effect, trust me, IT WILL GO ON FOREVER and I really would rather stop here 1 Link to comment https://www.fordxr6turbo.com/forum/topic/80069-light-weight-pulley-kits/#findComment-1254173 Share on other sites More sharing options...
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