Engine blown at Thunderhill on Sunday

ValidusVentus · 03-24-2015, 11:46 PM

Yep, you're completely right on the oil temp, I guess it was creeping to 240 in that session (pretty much the only unobstructed laps I have ever driven on that track) but its interesting how on the same lap the motor goes, it goes up noticeably higher. Only oil temp data recording device I have is the video and my brain.

Rev limit unchanged, 7.5K.

80k on the engine. I would estimate 2500 track miles, and a lot more general hard driving miles. If I cant use the power I almost always run it in a higher gear around high G corners to reduce engine wear and oiling issues. I also try to warm my oil before I take the revs high. Apparently it wasn't enough.

Yes, I F'ed up not leaving the track immediately. Was kinda struggling to absorb that I just blew my engine (never done that before) and for some inane reason was trying to coast it back to avoid a tow until they meatball flagged me and I gave up. I know that's not a good reason. After I stopped the oil thing immediately occurred to me and I felt like a total douche.

Oh and the gloves... those are go-karting gloves I snagged at the go-kart track in Dubai. Work great lol. I do own a pair of SFI approved but seem silly to wear since I'm not in a suit. Tho unburnt hands would be better than burnt hands.

Back on the subject of the thread, I have been in contact with Brian at Valkryie Autosport and he has been very helpful in working to figure out the best solution for me. Once we have a definite plan I'll update. Thanks for your time so far Brian.

Until then, thanks for the ideas, compliments and the constructive criticism.

BGTV8 · 03-25-2015, 02:32 AM

Quote:

Originally Posted by ValidusVentus

Yep, you're completely right on the oil temp, I guess it was creeping to 240 in that session (pretty much the only unobstructed laps I have ever driven on that track) but its interesting how on the same lap the motor goes, it goes up noticeably higher. Only oil temp data recording device I have is the video and my brain.

Rev limit unchanged, 7.5K.

80k on the engine. I would estimate 2500 track miles, and a lot more general hard driving miles. If I cant use the power I almost always run it in a higher gear around high G corners to reduce engine wear and oiling issues. I also try to warm my oil before I take the revs high. Apparently it wasn't enough.

Yes, I F'ed up not leaving the track immediately. Was kinda struggling to absorb that I just blew my engine (never done that before) and for some inane reason was trying to coast it back to avoid a tow until they meatball flagged me and I gave up. I know that's not a good reason. After I stopped the oil thing immediately occurred to me and I felt like a total douche.

Oh and the gloves... those are go-karting gloves I snagged at the go-kart track in Dubai. Work great lol. I do own a pair of SFI approved but seem silly to wear since I'm not in a suit. Tho unburnt hands would be better than burnt hands.

Back on the subject of the thread, I have been in contact with Brian at Valkryie Autosport and he has been very helpful in working to figure out the best solution for me. Once we have a definite plan I'll update. Thanks for your time so far Brian.

Until then, thanks for the ideas, compliments and the constructive criticism.

For the new build, please install an old-school mechanical oil pressure light switch (32psi should be commonly available) to a big red light in the cabin so if the oil pressure drops 'cos you have surge in the sump, then you can get out of the throttle to drop engine load and hopefully save the engine.

Alternative is AccuSump or Dailey dry-sump (and if Brian says they are 3.5K US I'm getting one - I was quoted 6K US$ 18 months ago, maybe because I am in OZ, I got the special "Export" price).

ssmoked · 03-25-2015, 11:45 PM

Quote:

Originally Posted by ValidusVentus

Yep, you're completely right on the oil temp, I guess it was creeping to 240 in that session (pretty much the only unobstructed laps I have ever driven on that track) but its interesting how on the same lap the motor goes, it goes up noticeably higher. Only oil temp data recording device I have is the video and my brain.

Rev limit unchanged, 7.5K.

80k on the engine. I would estimate 2500 track miles, and a lot more general hard driving miles. If I cant use the power I almost always run it in a higher gear around high G corners to reduce engine wear and oiling issues. I also try to warm my oil before I take the revs high. Apparently it wasn't enough.

Yes, I F'ed up not leaving the track immediately. Was kinda struggling to absorb that I just blew my engine (never done that before) and for some inane reason was trying to coast it back to avoid a tow until they meatball flagged me and I gave up. I know that's not a good reason. After I stopped the oil thing immediately occurred to me and I felt like a total douche.

Oh and the gloves... those are go-karting gloves I snagged at the go-kart track in Dubai. Work great lol. I do own a pair of SFI approved but seem silly to wear since I'm not in a suit. Tho unburnt hands would be better than burnt hands.

Back on the subject of the thread, I have been in contact with Brian at Valkryie Autosport and he has been very helpful in working to figure out the best solution for me. Once we have a definite plan I'll update. Thanks for your time so far Brian.

Until then, thanks for the ideas, compliments and the constructive criticism.

Any pictures of the blown motor? How much whp does your Z have?

ValidusVentus · 03-26-2015, 01:44 AM

Quote:

Originally Posted by batboyvaj

Did you have a lightweight crank pulley installed?

Nope. OEM

Quote:

Originally Posted by BGTV8

For the new build, please install an old-school mechanical oil pressure light switch... ...save the engine.

Alternative... ....."Export" price).

Best idea I've heard all day.

Quote:

Originally Posted by Spooler

Oops, someone put some marbles in the engine.... Ouch.

What kind of oil filter were you using? Amsoil oil filter have been known to let go at the o-ring gasket.

Purlator Pure One. The longer one.

Quote:

Originally Posted by ssmoked

Any pictures of the blown motor? How much whp does your Z have?

No pics yet. 310whp on a Dyno Dynamics as of 2 years ago.

Robert Yuras · 03-26-2015, 08:36 AM

Quote:

Originally Posted by ValidusVentus

80k on the engine. I would estimate 2500 track miles, and a lot more general hard driving miles.

BRO! You should be

that you got that much out an engine you ran that hard. Being a driver/crew cheif in the road race field for so long man, I've been with teams that use up 2-3 motors A YEAR, with full blown race parts.

Get you a stock rebuilt low milage engine and get your butt back on the track dude!

Then start a penny fund for the next engine. These things just happen. Looks to me like the motor just said "I'm done". That's racing.

carlitos_370z · 03-26-2015, 08:49 AM

Quote:

Originally Posted by Robert Yuras

BRO! You should be

that you got that much out an engine you ran that hard. Being a driver/crew cheif in the road race field for so long man, I've been with teams that use up 2-3 motors A YEAR, with full blown race parts.

Get you a stock rebuilt low milage engine and get your butt back on the track dude!

Then start a penny fund for the next engine. These things just happen. Looks to me like the motor just said "I'm done". That's racing.

Amen bro!!!

ValidusVentus · 03-27-2015, 12:36 AM

Quote:

Originally Posted by Robert Yuras

BRO! You should be

that you got that much out an engine you ran that hard. Being a driver/crew cheif in the road race field for so long man, I've been with teams that use up 2-3 motors A YEAR, with full blown race parts.

Get you a stock rebuilt low milage engine and get your butt back on the track dude!

Then start a penny fund for the next engine. These things just happen. Looks to me like the motor just said "I'm done". That's racing.

If I posted the 2nd half of the vid you would have heard me say "well, I'm no longer on engine number one." I knew the day would come, was just hoping it was still a while down the road heh.

03-24-2015, 11:46 PM	#1 (permalink)
ValidusVentus Enthusiast Member Join Date: Jun 2011 Location: Washington State Posts: 400 Drives: #18 Z34 Rep Power: 24	Yep, you're completely right on the oil temp, I guess it was creeping to 240 in that session (pretty much the only unobstructed laps I have ever driven on that track) but its interesting how on the same lap the motor goes, it goes up noticeably higher. Only oil temp data recording device I have is the video and my brain. Rev limit unchanged, 7.5K. 80k on the engine. I would estimate 2500 track miles, and a lot more general hard driving miles. If I cant use the power I almost always run it in a higher gear around high G corners to reduce engine wear and oiling issues. I also try to warm my oil before I take the revs high. Apparently it wasn't enough. Yes, I F'ed up not leaving the track immediately. Was kinda struggling to absorb that I just blew my engine (never done that before) and for some inane reason was trying to coast it back to avoid a tow until they meatball flagged me and I gave up. I know that's not a good reason. After I stopped the oil thing immediately occurred to me and I felt like a total douche. Oh and the gloves... those are go-karting gloves I snagged at the go-kart track in Dubai. Work great lol. I do own a pair of SFI approved but seem silly to wear since I'm not in a suit. Tho unburnt hands would be better than burnt hands. Back on the subject of the thread, I have been in contact with Brian at Valkryie Autosport and he has been very helpful in working to figure out the best solution for me. Once we have a definite plan I'll update. Thanks for your time so far Brian. Until then, thanks for the ideas, compliments and the constructive criticism. __________________ Mods: Dedicated caged track car, lots of things. \|\|\| Valkyrie Autosport \|\|\| Last edited by ValidusVentus; 03-25-2015 at 12:15 AM.

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