TBI motor swap done!

[mountain4x4]

how often and how much flooding would have to occur for that to happen?

I can't say I perfectly understand the physics of why it happens, my main experience with it is in high performance turbo motors (I am building an AWD Turbo Talon Rally Car). I have built and destroyed a couple of Mitsu 4g63 motors on the path in a variety if ways... These motors can easily make 500 hp from 122 cu in, so I think the piston rings are made of a pretty hard material, making break in very important. If the rings don't get the proper lubrication to seat (especially during break in), then when you run 25 psi of boost, which generates exteme cylinder pressures, you can get excessive blowby. It can also ruin the seat of an already broken in motor. I think on a motor generating relatively little power per cu in, its probably not as critical, but its still an internal combustion engine with all the same parts and principles involved. Having liquid gas in the chamber just can't be a good thing no matter what motor youre talking about. How much abuse it can stand probably depends on the material the rings are made out of, the initial finish on the cylinder walls during honing, and how much cylinder pressure is generated, the more pressure, the easier blowby will happen. I have also seen these turbo motors ruined by easy break in. Not enough cylinder pressure was developed to seat the rings before the abrasive quality of the cylinder walls was gone, and the motor never sealed right, again developing excessive blowby and oil consumption. Once the the motor was torn down, re-honed and re-ringed, the problem was solved.

 

[Corey 78K5]

Looks damn good Mark. When You get done with it You need to take it across the Channel and run some Frog's off the road Don't worry They won't fight back

 

[southernspeed]

how often and how much flooding would have to occur for that to happen?

I've been building motorcycle engines and a few car engines for over 20 years in the trade and I know all about fuel wash! How many times have I rebuilt Harley motors where the customer has bought the biggest carb he could find and stuck the biggest jets he could get in there because his mates said 'more gas = more power'?!!!
Fuel wash on a new motor (or an old one for that matter) can ruin the bores and score up the piston skirts in minutes...or sooner! The only thing stopping metal to metal contact (bad news) is oil. Whether it;s rings to bore or skirt to bore, even rings wearing in their grooves and in extreme cases valves in their guides. They need oil to stop this contact wear and too much fuel will just wash it away. Just running 'very rich' will do damage.
I've been checking my plugs and so far they're a nice light tan. That'll do for now!

 

[southernspeed]

Looks damn good Mark. When You get done with it You need to take it across the Channel and run some Frog's off the road Don't worry They won't fight back

Funny you should mention that! We're planning on doing the Croissiere Blanche in January which is a week driving up through the Alps in some serious snow. They say it can be done in a fairly standard 4x4 but be prepared for body damage!! Snow chains are mandatory apparently!
Check it out on the web, looks like fun to me.
Question is.....do I stop and pull the Frenchy out of the ditch or put my RayBans on pretend I didn't see him...then give him some roost on the way past?

 

[dirtwarrior17]

that scares me becuase my last oil change smelled like gas.... and i know it was running way rich from the plugs. i never drove it but i ran it in my driveway for probably an overall total of an hour and a half...

i know its a hijack but did this screw up my new 355?

 

[southernspeed]

You wouldn't have done it any favours. But I doubt you would have done terminal damage unless your bottom end has drunk so much fuel it damaged the shells (metal to metal contact again).
But to be honest, damaged or not, you may as well sort out your fuelling problems and use it. If it starts smoking or knocking then you know you have a problem. I don't really see the point in taking it apart 'just incase'. All the effort and time, not to mention expense! If the bores are a bit fuel washed it may sort itself out. If it doesn't then you'll be pulling it sooner than you wanted but at least you got a chance to drive it and sort out your fuelling and other ECM issues.
Give it an oil change, put some oil down the plug holes and turn it over by hand (plugs out) for a bit. Once you've run it, do an oil change real soon just to get any swarf or contaminated oil out.
It ain't worth worrying about(easier said than done, I know). Unless your first trip was going to be out in to wilds of the south American rain forests...on your own, then I'd just run it and see.

 

[dirtwarrior17]

sounds like it should be fine... i forgot to mention i've done 4 oil changes on it because the first two had water in em(first had a lot, second had barely any) but there was still a good consistency to the oil and there was no antifreeze involved plus i barely ran it at all with water in the oil. the second two I thought had gas but it either burned out of the oil or i was trippin.