SCCA Stock Class Rules Question
04-11-2011, 08:52 AM
#1
Drifting
Thread Starter
SCCA Stock Class Rules Question
Do any of you guys know if it would be legal to add the truck ignition coils to a car running in the stock class? I've seen things saying these may pick up a bit of power, but you have to change the wiring harness that plugs into the coils. Since that's not the high tension wires, I was wondering if that was legal or if it falls under modifications for an allowable mod being illegal unless specifically stated in the rules.
04-11-2011, 08:59 AM
#2
Melting Slicks
A long time ago there was an allowance for ignition changes in stock, but that is long gone. And no, you can only replace parts with the correct factory replacement part, any harness change would be illegal, other than the high tension wires, which are free.
04-11-2011, 09:32 AM
#3
Drifting
Thread Starter
The make of spark plugs, points, ignition coil and high tension wires
is unrestricted including spark plug wires having an in-line capacitor.
(Modification of the distributor cap for the purpose of installing allowed non-standard components is not permitted.)
From this I take it that aftermarket replacement coils are legal (like MSD, etc.), but I wasn't sure if there would be an allowance to change the harness before the coils to make them work. My guess was that you couldn't but I figured I would ask. Thanks for the confirmation.
If you used the stock harness and put adapters on the new coils to allow the stock wiring to plug into them, would that be legal or would the adapters not be considered part of the coils?
04-11-2011, 06:56 PM
#4
Melting Slicks
Yes looks like you have found a loophole.
I didn't realize that coils were still free in stock. Long ago you could adjust ignition timing and during the early emissions years you could get a big performace gain by bumping up the timing. Lots of cars ran really bad timing for emissions regs and that was one of the big things that was done to make emissions. I knew they took that away in the late 70's or very early 80's...
If you kept the stock harness and made something that plugs into the stock harness, then you are OK the way I read the rules. Once you get to your new coils, your ignition is all free so you are cool.
I didn't realize that coils were still free in stock. Long ago you could adjust ignition timing and during the early emissions years you could get a big performace gain by bumping up the timing. Lots of cars ran really bad timing for emissions regs and that was one of the big things that was done to make emissions. I knew they took that away in the late 70's or very early 80's...
If you kept the stock harness and made something that plugs into the stock harness, then you are OK the way I read the rules. Once you get to your new coils, your ignition is all free so you are cool.
04-11-2011, 07:58 PM
#5
Drifting
Thread Starter
Yes looks like you have found a loophole.
I didn't realize that coils were still free in stock. Long ago you could adjust ignition timing and during the early emissions years you could get a big performace gain by bumping up the timing. Lots of cars ran really bad timing for emissions regs and that was one of the big things that was done to make emissions. I knew they took that away in the late 70's or very early 80's...
If you kept the stock harness and made something that plugs into the stock harness, then you are OK the way I read the rules. Once you get to your new coils, your ignition is all free so you are cool.
I didn't realize that coils were still free in stock. Long ago you could adjust ignition timing and during the early emissions years you could get a big performace gain by bumping up the timing. Lots of cars ran really bad timing for emissions regs and that was one of the big things that was done to make emissions. I knew they took that away in the late 70's or very early 80's...
If you kept the stock harness and made something that plugs into the stock harness, then you are OK the way I read the rules. Once you get to your new coils, your ignition is all free so you are cool.
I still don't think I can mess with the timing since you need the stock ECU and tune, but maybe there is something you can do with the coils. I'm just trying to figure out options worth researching before going too heavily into modifying the car.
