Misfiring at high rpm. This was the problem.





Just ordered Diamond pistons, pins and rings. I will be installing them this week, Ill keep you all posted.

 

ouch....

 

oooh. not good

 

How do the sleeves look? If you can still use the same sleeves, should be an easy fix.

Pop the new ones in and start her up. Don't forget conventional oil

 

Shitty! But it will be even stronger now!

 

All it was doing was missing at high RPMs?

 

Yikes...another victim to overboosting? And was it number 4?

 

Ouch!

 

That is caused by heat, not boost.

 

What are your mods?

What exactly were your symptoms and what made you 'tear' it down?

 

That looks interesting but I have a bigger question, what the hell is going on Freddy?
You actually make a thread that doesn't link to ****??
What is the world coming to????

 

I would also like to know what cuased this problem. Mainly would like to know what mods you had Freddie

 

yumm... KFC...

 

The #1 piston is the one I COOKED. When I first purchased my car I just added a smaller pulley nothing more, 3.0 to be exact. A couple of months later I added the original stage 3 kit by Intense racing. 2.8 pulley, maf translator, 42.5 lb injectors and a gutted cat. I was running 4% lean for more horsepower. Dyno'd at 267hp and 249lbs of tq( I believe that is where it all began). 29k mi and a year later I started feeling a sputter at high rpm ittermittently and the sound of my exhaust was different. It was driving me nuckin futs. SO... I thought Fk it -- I went to 60 lb injectors and 2.6 pulley and a Stage 4 pcm by Intense. It was running great but still had the miss under a hard load around 5800 rpm's and every now and then a small poof of grey smoke and my dip stick would pop out. (making a friggin mess.) Well I wanted better pistons anyway so I tore it down and thats what I found. The #1 cylinder sleeve is a bit scuffed but nothing a good honing wont take care of I hope, but if not Im going to bore her. I believe running her as lean as I did for as long as I did was the problem all the other pistons look new, even #4.

So..... If you want BIG BOOST you need BIG INJECTORS and a good tune PERIOD!!

I'll have a update after work (The 4 of Nov) so stay tuned.

 

My honer arrived and turned out GREAT!!

Going to reassemble when my pistons arrive.

 

Just arrived!!!




Will be installing soon.

 

Super sexy.

 

good luck man keep us posted! you're pistions will be a lot more reliable now as you add on the power.

 

i did the same thing but mine was number 2 and 3 pistons

 

Mmmm nice.

 

weeee

 

THE SAME THING HAPPENED 2 MY #1 CYLINDER...............it sucked but my pistons will be here 11\13.............. i thought this only happen 2 my 1st cyl................we rock........haha

 

Almost done! Just need to put the valve cover on and hook up the electrical. She should be breathing again Monday. OOOOOOHHHHHH im sOOOOOOOO EXCITIED!!!!!!

 

All you did was pistons, right? About how long would you say the process was from start to finish? Anything really unusual that must be done while working on it?

 

Well im an auto technician. I took me 1.5 hrs to completely tear down. half hour to hone cylinder walls and install pistons, half hours cleaning parts and 2 hours to reassemble. I work on it a half an hour at a time "lunch break". Most of the time I was waiting for gaskets and and orings. So in total I have approx 4 to 5 hrs vested.

"Anything really unusual that must be done while working on it?"

Answer: Make sure your 60 degress b4 TDC before tearing down and DONT drop the timing chain.