Hypertech Ignition Coil
Thread Starter
Instructor
Joined: Dec 2005
Posts: 142
Likes: 2
From: Centerport NY
Hypertech Ignition Coil
I have a '90 (L 98) A4 with a bunch of bolt ons:
K&N, tossed frisbee, ported polished siamesed plenum and SLP runners, AFR, TB by pass, Taylor Spiro Pro wires, stock coil and plugs, Magna flow catback and a PCM custom PROM chip, 3:07 axle
Car runs very well. Will the Hypetech coil and another set of plugs (what brand?) provide enough pop for a tenth or 2 on the 0 to 60 time?
I don't race the car and rarely push it beyond 5500 RPM
thanks
Flatbush 862
K&N, tossed frisbee, ported polished siamesed plenum and SLP runners, AFR, TB by pass, Taylor Spiro Pro wires, stock coil and plugs, Magna flow catback and a PCM custom PROM chip, 3:07 axle
Car runs very well. Will the Hypetech coil and another set of plugs (what brand?) provide enough pop for a tenth or 2 on the 0 to 60 time?
I don't race the car and rarely push it beyond 5500 RPM
thanks
Flatbush 862
Racer
Joined: Jul 2010
Posts: 308
Likes: 2
From: Kansas City MO
If your stock coil is needing replaced because it's going bad and the plugs have 100k on them then and it's running rough that's a fine replacement and for plugs - just pick some decent brand and get it back to 'stock' performance - I'd personally stay away from the gimmick plugs (i.e. multi ground straps, circular grounds, etc.)
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
I recently did an MSD coil - along with wires, plugs, cap & rotor - to replace the junk that the previous owner had installed. Of course it ran better, but I think that's only because the stuff I replaced sucked.
Having a good quality ignition system certainly won't hurt but one thing that I did find was that high-powered coils seemed to generate some electrical noise that the digital dash picked up. With your 90 that shouldn't be an issue though.
As for plugs, I went for the autolite double platinums as I don't like to go in and change plugs if I don't have to. They stay clean and maintain their gap very well, so they're my preferred plug. To each his own though.
Having a good quality ignition system certainly won't hurt but one thing that I did find was that high-powered coils seemed to generate some electrical noise that the digital dash picked up. With your 90 that shouldn't be an issue though.
As for plugs, I went for the autolite double platinums as I don't like to go in and change plugs if I don't have to. They stay clean and maintain their gap very well, so they're my preferred plug. To each his own though.
Drifting
Joined: May 2006
Posts: 1,428
Likes: 7
From: Chewelah Wa
I just replaced my stock 85 coil, cap, rotor with the Hypertech kit and replaced my ignition control module with a Jeg's unit. Total cost was 100 bucks and my car is running way better. This is surely due to the degradation of my 25 year old stock parts. My tach is now not properly reading above 2500 rpm, though. Anyone know the fix for this?
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
I just replaced my stock 85 coil, cap, rotor with the Hypertech kit and replaced my ignition control module with a Jeg's unit. Total cost was 100 bucks and my car is running way better. This is surely due to the degradation of my 25 year old stock parts. My tach is now not properly reading above 2500 rpm, though. Anyone know the fix for this?
Drifting
Joined: May 2006
Posts: 1,428
Likes: 7
From: Chewelah Wa
A little late for that, and I promise to do that 25 years from now. I am sure there are a few thousand Hypertech kits installed on Vettes, I am wondering if anyone else has had this problem and what the fix may be. I have always hated the stock tach anyways, and run a regular dial tach.....but I would still like the stock tach to function properly.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
A little late for that, and I promise to do that 25 years from now. I am sure there are a few thousand Hypertech kits installed on Vettes, I am wondering if anyone else has had this problem and what the fix may be. I have always hated the stock tach anyways, and run a regular dial tach.....but I would still like the stock tach to function properly.
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Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
I like JFB's idea. I had same problem. I disconnected the GM tach filter on firewall if I recall. That worked for a while. Then it came back. ended up adding an aftermarket AutoMeter tach. I have Accel blaster in cap coil and ign module.
