I've got 125K, but the motor is solid for the miles. Its been meticulously maintained. I'm worried something might let go. Its an A4 with SLP CAI and LM1. I was thinking 100 or less?? Let me know, I'm trying to decide whether to go ahead and spray or wait 'til I blow her up and rebuild forged.

Any help is greatly needed and appreciated!

Thanks

 

I have well over 100k and i'm going to spray a 100 shot. That should be pretty safe.

 

You can do a leak down test, that will give you an idea of what kind of shape the motor is in. There are plenty of high mileage LS1 motors spraying a 100+ shots out there, as long as the fuel system is up to par & you use the safety devices you should be okay.

Matt

 

Like Matt said, do a leakdown test. Also, anymore mileage doesn't necessarily reflect the condition of the motor. As long as they're maintained mileage has a lesser effect nowadays than it used to. Motors are built to tighter specs, better motor oils are available, etc. Not to mention that as long as the car is properly maintained, I.E. O2 sensors have been changed to ensure a stoich (or close to it) A/F ratio then there's much less chance for the cylinders to wash down as used to occur on older engines with carbs that weren't kept in tune.

In your case you seem to be asking "Spray it, or wait till it blows, build forged then spray?" I say spray away! "devil" Seriously, as long as you're fuel system is up to the task spray it. I'd start with a 75 shot and see how everything feels, then work your way up. Most of the kits available come with a pretty good assortment of jets to adjust the size of the shot.

 

my z28 has 151,000 miles on it and i spray a 125 shot and sometime a 175 shot. i though it would go ahead and blow a long time ago but it still runs strong.

 

I know this sounds dtupid, but I'm still a newbie, where would I go to get a leakdown test? Is it something I can get at an auto shop somewhere? Or should I go to a tuner?

 

107k here and I'm spraying.

If you know how to change your own plugs and have the proper equipment (leak down tester, air compressor) you can do it yourself. It's really not difficult. Last time I checked autozone had a leakage tester for $45. Weather it's accurate or not, I don't know. If you don't feel comfortable doing it yourself most garages should be able to perform the test. Just make damn sure its a leak down test and not a compression test. Both work but the leak down is much more specific.

 

127k and i am cammed and sparying a 150

 

164,000

305 tbi

150 shot

car smokes oil like a bitch hot starting it after a 5-10 min cool down.

oh well. needs more 540 BBC w/ Gt42-80

 

my 98 will have over 100k when i spray it, dual dry nozzles 125ish rwhp shot

 

A good buddy of mine has drove the living **** out of his car since it has had 20K on it and he's spraying a 150 shot through a TNT power ring. It now has 17x,xxx on it and still going strong. Guess it is all about how big your ***** are