I have read a few threads of people who "hear of people having problems with there secondaries being bored to 1300's." I just wanted someone who has experience to chime in with some insight.

thanks guys

 

Searching is your friend. Lots of info about this out there.

 

I'm not entirely sure. 1300's had been repected for a long time and were considered a safe way to upgrade. Then came a rash of blown motors, leaky injectors, stuck open injectors, etc...

Some people have commented that NO injectors should be bored out as they no longer work as well or have the same life expectancy of non-altered injectors of the same size.

It's hard to tell. I'm sure with anything, there is a failure rate, but I hope it low as I also went the 1300 route. Why the 1300 demonstrated more press on the board versus enlarging the injectors to other sizes is beyound me.

If you can afford it, I think the safest way to do it is to get a aftermarket fuel rail that accomadates the larger non-altered injectors.

If not, go for the enlarged fuel injectors. Just keep an eye out on your system...

There are still some people with nicely running cars and 1300's that haven't reported any problems. I only have about 1000 miles on mine. The first 900 or so were for a break in so no boost.

 

There are many fuel injection specialists who recommend against any injector modified by boring. Simply too high of a failure rate to justify it. And the site I read it on was a non-rotary site - so I doubt they were sweating about apex seals when they wrote it, too.

Dave

 

There may be a higher failure rate associated with bored-out injectors, but MANY people run them with NO issues. I doubt that RC Engineering would keep doing this if there was a significant problem with doing so.

The problem with going with 1600s and an aftermarket rail is that is pretty much makes passing emissions impossible. I have a car that can put down 360+ rwhp with a conservative tune on 91 octane, but can pass emissions by just swapping out my midpipe for my hi-flow cat.

 

I've been running 1300cc secondaries with no problems. The only down side is that i had to get them cleaned after ~12k mi. because one of them started leaking a little bit. I'm waiting to drive it another 10k, waiting to see if i'll have to do it again. While it might not be the absolute *best* way to go, i would say it's a fairly good alternative if you don't have the money to blow on new injectors. But if you do have the money, go ahead and go new. Either way you may have problems or you may not. Who knows? But yes, the liklihood would be greater with bored out injectors...even if only moderately so.

 

Actually, come to think of it...i don't remember if it was my primaries or secondaries that were leaking. It may well have been the stock 850cc secondaries that were move to the primary position that had the leak. The bored out secondaries were 1200cc and had nothing wrong with them, but i went ahead and got them enlarged to 1300cc while they were out being cleaned. Yup...that's what happened. So bored out 1300s...i give em two thumbs up based on personal experience.

Hope that helps.