My supra had a bad time last night.

[funky_monkey58]

treimche;278937 wrote:
AFR leaner than 12:1 or so will certainly damage your motor, ESPECIALLY if you're not on race gas. What do most people tune their turbo motors to on race gas, about 12.5:1 at most?

I think your information is off just a bit. I generally shoot for a 13.5 afr. For a good tune.

[Bp-08]

shouldnt it be 12:1 at WOT.

[beachbum_jon]

zbrown;278811 wrote:
Don't feel bad.... you surely are not the only one that has done this lately......:mad:

I highly doubt it had anything to do with tunning.................. either a oiling or bearing setup issue....... that is i am assuming the noise you are hearing is a spun bearing

you didnt do what i think you did...did you?

[treimche]

funky_monkey58;278944 wrote:
I think your information is off just a bit. I generally shoot for a 13.5 afr. For a good tune.

That's why you blew your car up then. 13.5:1 on a turbo motor is gonna meltdown. That might work on an N/A motor however.

[91nbtsi]

Good luck with 13.5:) You can damage bearings due to knock. Let's see some pics when you get it apart!

[funky_monkey58]

I really do not see how I could have damaged anything with my tune. Considering I did not go into positive boost territory beyond 8psi max as that is what my wastegate is set to. And I was on the break in cycle so I really did not want boost affecting the piston ring seals.

[treimche]

Well what was your a/f ratio and how much was it knocking? Even a little boost, running too lean and knocking will destroy bearings.

[funky_monkey58]

http://www.truaxmotorsports.com/supra/SupraKnock.AVI
I don't think it was cause by me running lean or detonation. But we will see once I pull it apart if a piston is fucked I will eat my words.

[fdfreak]

zbrown;278811 wrote:
Don't feel bad.... you surely are not the only one that has done this lately......:mad:

yep, it happened to me a year ago. scared the living sh*t out of me. hood was trashed and my roof was too. Nothing happened to my windshield though.

[funky_monkey58]

Heres some more pics.

[funky_monkey58]

Carnage pictures this is what I found in rod #3

If I would have had fair warning the guy I got the block from was incompetent in putting together an engine I would have had the crank cut and smoothed out.
When I first popped the rod cap off it looked like there was no bearing at all and that thin pieces were what I managed to scrape off with a screwdriver.

[Grr]

lol'd at that. when you buy a motor ive found its best to just use the parts and re-assemble everything yourself

[zbrown]

zbrown;278811 wrote:
I highly doubt it had anything to do with tunning.................. either a oiling or bearing setup issue.......

this... lol

[funky_monkey58]

Grr;279856 wrote:
lol'd at that. when you buy a motor ive found its best to just use the parts and re-assemble everything yourself

I should listen to you more often.:icon_salut:

On another note I got the block completely stripped down and it looks like I might be able to do a hone job and replace the rotating assembly.

Oh and I threw the crankshaft like it was a shot put right out the door of the shop..... Where it still lies and I will cut it in half and use it as an anchor for my canoe.

[91nbtsi]

zbrown;279866 wrote:
this... lol

Ahh, well from the first post all we knew was that he went out and was doing some tuning. No knowledge of a fresh engine!

Good luck with the rebuild!

[funky_monkey58]

Well the Block pistons rods and crank are all at the machine shop now.

I am really looking forward to this being done.

[Rexwagon]

GL to you in the future. hopefully it all turns out for ya