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

mmm, i dont remember why the reason why no one gets it really is... nvm, someone plz enlighten me

dont do it it doesnt work and unless u have the nology and or thick wires your car will stall out at any given moment,believe me i know i had one

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I don't believe you. I've never heard this before. You may have had a bad system or something. I wouldn't expect much if any of a hp gain, but you could expect some throttle response improvement. Lots of things out there improve throttle responce. I've heard a couple times that the MSD unit will do this. If your drag racing, it won't do much. But if you solo racing, and jumping in and out of turns, it could help.

people dont buy one because the stock ignition is good for a whole lot of HP. Same with wires, why do people change their wires. All the MR2 guys that are pushing high horsepower are using Toyota wires and ignition.

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They're also running turboes, which means they need colder plugs. On a NA engine, you can make them hotter without problems. I've heard that wire thing over and over. It's probably true. Why do they keep the stock wires? Is it because they just don't need upgraded? I do think that the MSD will improve throttle response. I don't see why it wouldn't. Same thing with better plugs and wires.

They keep toyota parts because they can trust them. They don't have to worry about something breaking a month or a year after its been installed. Colder plugs would be the only thing they would change, but im sure they stick with NGK, like all toyota factory parts.

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So, Toyota makes the best parts in the world? I know they make quality stuff, but I don't think that Toyota wires are any more reliable than nice aftermarket ones. There are some aftermarket ones that aren't as reliable, but that's not all of them. It is probably not necessary to upgrade wires on a 3sgte until a certain hp mark. But that doesn't mean it wouldn't be okay to do. Besides, I'm use to dealing with 5s, and the wires are very small for it. You can't compare a 5s to a 3s. Sure, they're both Toyota, but that's about it. The thing I'm trying to do is go for the best throttle response with my 5s, because I know I'll never get much power out of it. So I want it punchy, so at least I'll have something for the twisties. As anyone ever put better wires on a 5sfe and experienced a loss of hp? If you can prove that, I'll concede.

I think you will be hard pressed to find someone who can show a number gain from plug wires...

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I don't think many people dyno when they put new plugs and wires on, but I'm will to bet a lot that they do come up with gains. Especially if they are origianal equipment and are due to change. One of the best modification you can do to your car is a good tune up.

I want to get someone in here who really knows what they're talking about. Settle this. I don't care if I'm right or wrong, but I'd prefer right, I just want to know.

ok it still doesnt work ud be wasting ure money if u buy one i8t may improve a tiny bit nothing noticible only if u have upgraded everything else then u might otherwise,just go get an intake

I'm with Bulldog on the HP/Throttle response gain thing. I have the MSD 6BTM, Tach adapter and Blaster Coil and I noticed a definete improvement in throttle response but I highly doubt there would be much in the way of HP gains. If you want a cheap test of ignition improvement - buy a Blaster coil and install it. It should cost about $40 from your local parts house (I got mine from O'reilley's - a normal parts house) and it shouldn't take anymore than 20min's to install.
The only trick is the stock coil wire must have a different plug crimped over the stock male prong. This part comes with the Coil. It's easy to install too.

My past experiances with other cars has shown exactly what bulldog is saying. MSD ignition will improve throttle response ( always noticed a slight gain) but sadly, they also have the reverse effect when it comes to gas mileage. I can guarentee you that they will hurt your gas mileage. Your choice.

That's weird - my gas mileage actually went up by a wopping 1mpg LOL.

I don't understand how a more effeciant spark can hurt your milage. Seems like it would only help. You're not putting any more fuel in the chamber. I would like someone to explain this to me please.

It doesn't - it helps slightly. I know cause I try to calculate my gas mileage on every tank.

hmmmm, this is weird indeed. Because when i had mine on gas mileage was hurt (i kept track) and when i took it off my gas mileage increased. I dunno what can explain ur kind of results.

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.

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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

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Just a question. My Celica revs to 7K and drops from there and back to 7k and drops etc. What do ya'lls rev to?