I have been looking at these kits in some of the catalogs i have where u can purchase a cap, rotor "high output coil" and a "high output" module.. anybody running any of these?.. as an upgrade was it worth the money?... will it damage anything in the long run?

I have the proform brand "tune up" kit as they call it in my GM HEI dist. It has worked great for the last 3 years.

But IMO unless you done maxed out all your other engine parts, or your dist. has bad parts in it then you will get better gains with other type parts.

Ing. systems if working right to start with won't really give you any more power with the aftermarket ones.

I have the proform brand "tune up" kit as they call it in my GM HEI dist. It has worked great for the last 3 years.

But IMO unless you done maxed out all your other engine parts, or your dist. has bad parts in it then you will get better gains with other type parts.

Ing. systems if working right to start with won't really give you any more power with the aftermarket ones.

Yup, that's what I've noticed and have been told by everyone else as well.

Ing. systems if working right to start with won't really give you any more power with the aftermarket ones.

I agree.

A stock HEI has more than enough puch for any N/A motor up to 5000. Thereafter it starts dropping energy pretty quickly (the coil can't fully charge fast enough between firings). Even with it starting to drop off quickly beyond that point there's often more than enough punch left to get the job done up to 6000 or so on most N/A motors. It's usually beyond that point that you see some benefits from the matched "high performance" coil & module sets. And that benefit is often fairly small unless you're obviously getting misfires in the upper RPMs with the stock stuff.

I happen to run an MSD coil and module in my roots-blown 383's HEI distributor. I never turn over 6000 RPMs with the combo. I used to run a 6A box on it, but when the box took a dump I "threw in" the MSD module just to get it up and running again (I had one laying around from years before). It runs as well or better than it ever did with the box. Possibly the box was bad from the day I installed it but I was done asking questions- the slightly upgraded HEI clearly works just fine on my mild blower motor so that's how I'm leaving it. Even if I did an upgrade to a good CD amplifier box setup again and tweaked it out the wazoo I doubt I'd see anything more than very very slight gains anywhere in the engine's usable power band.

Stock is great to about 4500-5000 rpm,
then it starts falling off,

Once of hte first things I did was get the HyperTech Cap,Coil & Rotor kit,
noticed a difference in from 4500-5500 rpm, probably worth .10 in the 1/4 if I was lucky, but I don't think I paid much for it,

IF you are die hard into your car, you will end up udpgrading to a complete MSD ignition eventually, so you might want to wait and buy an MSD 6AL, and a distributor, 85551, and blaster 2 coil, all at once.

You don't NEED all this though , unless you are upping the compression.

IMHO even with higher compression you don't need the higher end ING. systems.

The only time I see them being a benifit is on large cammed race engines that loads up and fouls out plugs at idle and low RPM (staging car, pits, loading and unloading car on trailer, etc)

Or for boosted engines like turbo, N20, or supercharger. Where the cyl pressure is so high it can/will blow the flame out. Then add ons comes into play too with the boosted engines.. Having a boost ref. timing retard, or N20 timing retard is a great benifit and only way to get that is through one of the CD ing. boxes like MSD, etc.

The add ons like 2 and 3 step rev limiters are great benifits to the race car too