Zoom zoom BoOm x2.

[Paul]

so did you find out what happened yet?

 

[BlkZoomZoom]

I am going to pull the head off tonight after work.

 

[RyanJayG]

I'm thinking you threw a push rod, or maybe a rocker desitigrated... lol


j/k

it sucks man... sorry to hear about it. maybe you'll get lucky and have all your damage be confined to the valve train and no valve impacted pistons, but its more than likely wishful thinking.

good luck

 

[BlkZoomZoom]

It held 140psi of pressure in it. So I know all the valves are there, just don't know what condition they are in.

 

[RyanJayG]

thats interesting... yet it still holds some pressure...

weird... did you find what those small solid particals atually came from?

 

[anarchistchiken]

I'm thinking you threw a push rod, or maybe a rocker desitigrated... lol


j/k

it sucks man... sorry to hear about it. maybe you'll get lucky and have all your damage be confined to the valve train and no valve impacted pistons, but its more than likely wishful thinking.

good luck

Is that even possible without the valves straight up breaking in half and getting lodged between the head and the piston? We have non-interference engines, right? So hopefully the pistons will be okay.

That really sucks to hear man. I hope the damage is minimal to the engine and the trans is just a broken pressure plate. Good luck.

 

[BlkZoomZoom]

Not for certain. However they sure did look like the top piston ring.

 

[TurfBurn]

No... we have interference motors... it's not by much when not running (probably by about 2 thousandths or so...) but when running and rod stretch etc occurs it's a whole 'nother story.

 

[anarchistchiken]

Well, I learn something new everyday.

 

[MPNick]

Yes it will, if you use extra injectors to dump fuel. We've been over this before.

Yes but that is not what you posted. Your post stated that the MPI will over ride the stock ECU redline, it will not.

His motor went to 7,200 rpm based on the data from the MPI. The engine must have gone much higher to cause damage. The stock ecu will cut the spark at 7,200. Thats why the MPI only read 7,200. Going from 6,800 to 7,200 on a built engine will not cause this type of failue.

As far as the MPI letting the engine rev passed the stock redline, maybe. You can adjust when the extra injectors stops adding fuel, so if you set it right it will not over rev.

 

[MPNick]

I'm thinking you threw a push rod, or maybe a rocker desitigrated... lol


j/k

it sucks man... sorry to hear about it. maybe you'll get lucky and have all your damage be confined to the valve train and no valve impacted pistons, but its more than likely wishful thinking.

good luck

We do not have push rods or rockers.

 

[Brian MP5T]

BlkZoomZoom

I just noticed this thread. I am so sorry to hear about what happened. I don't know what I would do if I blew a second motor. I think I wouldstart riding a skateboard or Bus to work and never own a car again.

Good luck with whatever you decide to do in the future. Your MSP was a real monster.

 

[BlkZoomZoom]

Yes but that is not what you posted. Your post stated that the MPI will over ride the stock ECU redline, it will not.

His motor went to 7,200 rpm based on the data from the MPI. The engine must have gone much higher to cause damage. The stock ecu will cut the spark at 7,200. Thats why the MPI only read 7,200. Going from 6,800 to 7,200 on a built engine will not cause this type of failue.

As far as the MPI letting the engine rev passed the stock redline, maybe. You can adjust when the extra injectors stops adding fuel, so if you set it right it will not over rev.

The MPI showed it going to 7187 (that is the highest setting I have it at) and staying exactly there for approx. 6 seconds. The Deflection was WOT the whole time. It showed no evidence of any type of fuel cut or spark cut. The a/f got leaner and leaner as time went on the longer it was kept at WOT. I was standing right next to the car, there was no rev limiter. Now why there was no limiter I don't know. But I garuntee you it went past 7200...

 

[RyanJayG]

We do not have push rods or rockers.

DUH!

it was an attempt at levity

 

[Spooled]

I'm not sure why people are making a big deal about the difference between a dyno run and him racing at the strip. My guess would be that racing at the strip is harder on the engine/trans because of the hard shifts and more stress from air resistance and ground friction. I would imagine that running it through the powerband once on a dyno would be minimal stress compared to that. Hell, I probably put more stress on my car getting on the freeway than I would on a dyno.

 

[BlkZoomZoom]

I'm not sure why people are making a big deal about the difference between a dyno run and him racing at the strip. My guess would be that racing at the strip is harder on the engine/trans because of the hard shifts and more stress from air resistance and ground friction. I would imagine that running it through the powerband once on a dyno would be minimal stress compared to that. Hell, I probably put more stress on my car getting on the freeway than I would on a dyno.

Not entirely true. I have yet to not spin the tires through the first 2 gears at the track. On the dyno, there is no give.

 

[MPNick]

Hell, I probably put more stress on my car getting on the freeway than I would on a dyno.

Never dynoed before?

Try having four 200 lbs people in your car. Going up hill with the A/C on and towing a trailer. Now shift into 4th gear at 2,000 and nail the throttle 100% for the next 7-10 seconds. That is like a dyno pull.

 

[TurfBurn]

not to mention the terrible air flow/cooling on a dyno...

 

[Spooled]

Nope, never dynoed before. Wasn't trying to be an ass, it was a serious question. I just assumed that it was a more controlled environment and safer.

 

[Spooled]

I can see that having no give at a low rpm under full load would be hell on the engine/trans, though.