I know this has probably been asked a hundred times before, but i'm too lazy to look it up! I'm considering getting the Herrod underdrives and helix spacer, what kind of improvement can I expect and is it worth the $$$$$$$?
If you are going to put in the underdrive pullies, you will also need to replace your clutch with a mal woods clutch. My understanding of the underdrive pullies is that they allow the engine speed to be higher. When the clutch engages it has to engage with the engine at a higher speed causing 1. a quicker take off and 2. more wear and over heating of the clutch. Many people have got them and found that it burnt their clutch fluid to smitherines.
I personally wouldn't get them, but that is just my opinion. Please feel free to correct anything i have written on here. Maybe someone could give us a better understanding of exactly what the underdrive pullies actually do.
The helix spacers help the flow of air to the engine. In my opinion, they look better than there actual performance gain. If you run a CAI then it with help a little, but we're talking bugger all performance gains.
If you are going to put in the underdrive pullies, you will also need to replace your clutch with a mal woods clutch. My understanding of the underdrive pullies is that they allow the engine speed to be higher. When the clutch engages it has to engage with the engine at a higher speed causing 1. a quicker take off and 2. more wear and over heating of the clutch. Many people have got them and found that it burnt their clutch fluid to smitherines.
I personally wouldn't get them, but that is just my opinion. Please feel free to correct anything i have written on here. Maybe someone could give us a better understanding of exactly what the underdrive pullies actually do.
The helix spacers help the flow of air to the engine. In my opinion, they look better than there actual performance gain. If you run a CAI then it with help a little, but we're talking bugger all performance gains.
Ummm, what?
You don't have to do a single thing to the engine other than fit the kit. The clutch has no relevance at all. They are highly recomended and a great first mod. I have seen the difference in power. I wouldn't go Herrod though.
The spacer doesn't do anything. Might give you a bit up high but thats it.
__________________
LTDHO
Power by Herrod 185rwkw
Power by me 313.6rwkw Stereo by ///Alpine
You don't have to do a single thing to the engine other than fit the kit. The clutch has no relevance at all. They are highly recomended and a great first mod. I have seen the difference in power. I wouldn't go Herrod though.
The spacer doesn't do anything. Might give you a bit up high but thats it.
I'm talking for the BA's. This may be different for other models. I think you will find it is very relevant to the clutch in the BA's. Yes it just bolts on, but you need to look at what it does and how it affects other components of the car.
You don't have to do a single thing to the engine other than fit the kit. The clutch has no relevance at all. They are highly recomended and a great first mod. I have seen the difference in power. I wouldn't go Herrod though.
The spacer doesn't do anything. Might give you a bit up high but thats it.
If not through Herrod Chris from BluePower then or ??
I'm talking for the BA's. This may be different for other models. I think you will find it is very relevant to the clutch in the BA's. Yes it just bolts on, but you need to look at what it does and how it affects other components of the car.
Explain to me how fitting underdrive pullies effect the clutch on a BA?
__________________
LTDHO
Power by Herrod 185rwkw
Power by me 313.6rwkw Stereo by ///Alpine
I not going to explain it to you, but I will confirm that the original clutch will not be able handle the extra enertia created by the underdrives. I don't quite understand my self why it happen's but it does.
When I fitted underdrives to my BA XR8 the clutch handled it quite well for 5000km then after the pressure plate stopped operating (so to speak) when driving the car in a performance type of way. In short the pressure plate over heats and causes the fingers to soften therefore rendering the clutch usless at hi engine RPM's.
If you wan't more info contact Mal at Mal Wood automotive on 07-4661-3548.
Mal will explain it to you in more detail.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Stereo by ///Alpine 
Chris from BluePower then or ?? 
Linear Mode
