PowerSpark HT Leads

[AlexHillTVR]

Anybody had any experience with these?

http://www.ebay.co.uk/itm/HT-Leads-Rover-V8-SD1-Ig...

First impressions are that they are cheap, but come in red and blue and boast high noise suppression. Or would you steer clear?

[s p a c e m a n]

I'm running them in blue along with the dizzy and arm. No missfires, all the right length, radio still works and they don't keep on popping off the dizzy like my old lucas ones had a habit of doing. No complaints so far, had them on for a couple of months..

http://www.ebay.co.uk/itm/130616393972?ssPageName=...

[AlexHillTVR]

Cheers spaceman, I just like the fact that they come in red!

Even if they do need changing every other year, it'll take 8-10 years to match the price of Magnecors

[swallet]

Conversely I had these in blue when I bought mine and had terrible radio interference.
Swapped them out and it resolved the issue.

I just stick to the standard Bosch land rover items - most of the tuners seem to recommend the same from my reading at the time. Not quite as aesthetically pleasing though.

[jojackson4]

Has any one got the lengths of each lead mine are on but no way right

[AlexHillTVR]

swallet said:

Conversely I had these in blue when I bought mine and had terrible radio interference.
Swapped them out and it resolved the issue.

Radio interference as in your radio acting funny? Or radio interference as in radio frequencies affecting your ignition system?

[swallet]

As in couldn't get my stereo to pick up anything but the ignition system when they were in.

[swallet]

As in couldn't get my stereo to pick up anything but the ignition system when they were in.

[Richard 858]

swallet said:

As in couldn't get my stereo to pick up anything but the ignition system when they were in.

That may be to do with the plug boots, whether they're suppressed or not. I've had the red powerspark leads & shiny coil & no problems with any interference, spark strong enough for 275 bhp from a standard (ACT smooth bore induction hose & elbow) 450.

Edited by Richard 858 on Tuesday 21st January 17:50

[swallet]

If people want to change these leads for aesthetic reasons then do it. Just be wary of possible interference.

As for performance gains from a simple change of HT leads- please! The amount of pseudoscience made up by this industry puts big pharma tp shame!

[blitzracing]

Quite simply the less resistance you have between coil and plug tip, the more radio interference you will get due to a less controlled coil discharge. Resistance can be in the leads, plug extenders , resistive plugs, or a combination. If all three items are resistive, it may be too much and cause the engine to misfire at high RPM as the spark energy drops but Ive run Bosch resistive leads and plugs together without issue. Dropping the resistance does not generate more power as there is plenty of spark energy to start with and you simply want to ignite the mixture, not arc weld it. The only time you need lower resistance is with very high compression ratios / boost / nitro or LPG where the spark needs a higher voltage to start and maintain as the dielectric strength of the mixture in the combustion chamber is higher, making ignition more difficult in the first place. Hardly the world of an old lazy V8.

[Mr Supercharged]

I bought this kit but asked for right angle coil pack connections:

http://www.ebay.co.uk/itm/121057025847?ssPageName=...

I've done this because the set of leads I bought for a p38 rangerover (my TVR has same coilpacks that fit across the back of the engine behind the inlet manifold) were crap, all too long. So I shortened them, then found the insulation in the middle of the leads was failing (you could see a blue glow in the dark).

I'll be making up a set at the correct length. The only problem is you will need one of these to do the job properly:

http://www.vehicle-wiring-products.eu/VWP-onlinest...