No 7

 

Cylinder 7. A few weeks after I decided to get the upgraded engine mods, I started seeing blue smoke on start up. It was very slight. Then I got a misfire cyl 7. I cleared it and a few days it came back. As time went on, the blue smoke started to get more and more and the cel would come back more frequently. About 1-2 weeks before the auto shipper picked up the car, the blue smoke was heavy and all the time. The spark plug for cyl 7 was oily. My decision to get the beefed up engine weeks before worked out good, as I never suspected I would have the cyl 7 go out on me.

My question is based on the pics what is the cause of cyl 7 going out? Old age (142k miles) where the position rings just gave out?

 

Wow, hey J, did you run the car hard all the time?

 

I don't think so. Why you ask? What do those pics of cyl 7 tell you as to its failure?

 

Did you notice that you were burning oil every 1000 miles?

 

No, I noticed the blue smoke a few weeks after I decided to beef up the engine.

 

Looks like you made the correct choice

 

Detonation is bad, mmmmmmkay

 

Gotta love that Southwestern 91 octane.

 

From the pics, how can you tell that it was detonation?

 

Some real world experience mixed with extensive research (of the topic), and the understanding that when a piston gets that hot, pre-ignition and detonation (two different things) will usually be a cause.

Proper combustion, while it can get very hot, will not inherently cause breakdowns of the piston and bore like this. That is to say the piston first, and then the bore.

Alusil is quite tough, but once it has foreign objects, etc - it goes south quickly.

Are you suggesting it was something else? Its possible it is a bent rod that re positioned the piston and destroyed the bore, but a bent rod is water ingestion, detonation/preignition, or rpm.

 

Thanks. I'm just trying to find out the cause of why cyl 7 went. If it is detonation, then I need to know what caused that detonation.

 

Lean condition, could have been timing not being pulled in time due to iats or bad gas but I don't think it was done one time, it was over time.

 

Were you having that hiccup issue that was causing a lean condition until you cycled the key?

 

No, no hiccup issue. Have not had that problem since I had oem SC

 

Picture of head

 

Whatever happen to the guy from TN that was trying to do the stand alone ecu integration. You need to talk to him to protect your investment.

 

 

That was quick.

 

As precautionary measure got the injectors cleaned

 

Wow. About how many miles were on the injectors?

 

If you wanted to run E85 you would be sub optimal. Looks like 85 at 600 to 700 on these cars is a 70-100lb one.

The question I have asked (and never really got a straight answer) is whether the tune can compensate for such short opening times in low and mid throttle if you go that big on the injector.

 

12k miles, approx.

 

I'm running ID1000s on E85 and they're performing just fine

 

Perfect. As I said 70-100 would be sized properly. Good to hear no issues. Some have concerns over the non-SS insides compared to the 130s.

I can search your posts if you don't have time - did you change the supply at all After the 320s?