MSD Ignition Options

[95CST]

I have searched but not found anything on the MSD igntions in celicas. now maby I am barking up the wrong tree, but I would like to hear what other people have to say about the MSD SCI ignitions.

Here are links to a few:

http://www.msdignition.com/sci_1.htm

http://www.msdignition.com/sci_7.htm

http://www.msdignition.com/sci_6.htm


I am thinking about getting one for my celica, any recomemdations are welcome

[Hanyo]

a ignition system upgrade is like lighting a fuse to a 6 dollar firework with a lightning bolt. The firework will still exploted with the same power, you just wasted alot of energy doing it. Its pointless.

The only benifit with an after market ignition system is more accuracy. Your engine will run better and have more power if you can have the spark at the PERFECT time. Most stock ignition systems have a tolerance for error that helps accomodate for different fuel/temperature/sea level. If you upgrade your ignition system and tune it specifically for you engine set up, then you will will notice an increase of performance.

r
Another instance where the ignition system upgrades help, are when you are increasing the rev limit of the engine. When the rev limit is increased the stock ignition system can no longer produce efficent sparks/accurate sparks at the higher rpm. That is also the reasons why toyota engines dont benifit much from an ignition system upgrade. Toyota engines do not rev high from the factory ( non vvti engines). For our case, the rev limit for the 7a and 5s is still below the 7k rpm mark. This is farely low and is not a good enough reason to upgrade the ignition system.

But if you insist and want to add some more shinny new toys to your engine bay, go for it.

[Dr_Tweak]

a ignition system upgrade is like lighting a fuse to a 6 dollar firework with a lightning bolt. The firework will still exploted with the same power, you just wasted alot of energy doing it. Its pointless.

The only benifit with an after market ignition system is more accuracy. Your engine will run better and have more power if you can have the spark at the PERFECT time. Most stock ignition systems have a tolerance for error that helps accomodate for different fuel/temperature/sea level. If you upgrade your ignition system and tune it specifically for you engine set up, then you will will notice an increase of performance.

r
Another instance where the ignition system upgrades help, are when you are increasing the rev limit of the engine. When the rev limit is increased the stock ignition system can no longer produce efficent sparks/accurate sparks at the higher rpm. That is also the reasons why toyota engines dont benifit much from an ignition system upgrade. Toyota engines do not rev high from the factory ( non vvti engines). For our case, the rev limit for the 7a and 5s is still below the 7k rpm mark. This is farely low and is not a good enough reason to upgrade the ignition system.

But if you insist and want to add some more shinny new toys to your engine bay, go for it.

Or, if you're running so much boost that the spark is actually having trouble jumping the gap and you need more power to push through the density of the combustion chamber. As already mentioned, this doesn't happen until VERY high horsepower levels.

While it's possible that you may get a marginal throttle response improvement with an aftermarket ignition system, my opinion is that the money is better spent elsewhere until ignition actually starts to become a weak point.

-Doc