After yesterday racing my car has lost power! Smoking & lost lot of oil... I was raci

3615 Views 27 Replies 13 Participants Last post by Blindkiller, Aug 5, 2012

Peter

Discussion Starter · Jan 26, 2002

After yesterday racing my car has lost power! Smoking & lost lot of oil... I was raci

After yesterday racing my car has lost power! Smoking & lost lot of oil... I was racing on 95 octane gas 1.5 Bar boost.

My Supra has started smoking, I have also noticed low oil level. There is a lot of oil on APEX'i BOV (I have it mounted just before surge tank). On low rpm it does not work steadily like it used to. While accelerating engine works unsteady.

Have I burned hole in one of pistons? Or maybe one of rings is destroyed????

Please tell me what could be the reason because I can not wait until Monday when I will go to my mechanic.

1 - 20 of 28 Posts

Shinbone

· #2 · Jan 26, 2002

possibly the turbo(s) are gone, when i killed mine, no noise came for about a month but lots of oil on the BOV and all the intercooler piping, and crazy smoking(white), hope this helps and best of wishes John

Peter

Discussion Starter · #3 · Jan 26, 2002

But why engine is working unsteady? Also my turbo is still boosting 1.5 bar

BlitzTT

· #4 · Jan 26, 2002

If your turbo is still boosting 1.5 bar as we speak... it looks like one of your pistons might have let go or something.... as in melted or a hole in it.... if you have a compression tester from a store or something just do a quick test to see... seems like you might have lost a piston or two..... prolly due to running 1.5 bar or higher for extended period of time using only 95 octane.... as one of my friend messed up TWO motors as he was running high boost on stock twins on93 octane.... detonation killed it... put a hole thru three of the piston on the first motor second one only one piston.... hope thats not your proble... but all the symptoms you describe sounds exactly like what he did especially losing big time oil.... oh yuh possibly prolly messed up a valve or something too.... later.... good luck....

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Mighty Mouse

· #5 · Jan 26, 2002

I was boosting 1.5bar on my stock turbos and they the seals started to go. would consume 1 qt of oil prior to hitting 3K miles. Car still would put out 1.5psi prior to swapping them out. when i swapped them i had no more smoke out teh tail. Boostin at 1.5 will make your turbos unhappy very fast. Even though yoru loosing power and i was not, I would Suspect turbo to be at fault.

HoustonSC300

· #6 · Jan 26, 2002

Peter: Believe me you would know if you burnt a couple of pistons up....first off if your still boosting with holes in your pistons, you would be getting blow by...which you did not say you were experiencing. Another symptom of blow by is your oil dipstick blowing out. I believe your pistons are fine, probably just a turbo seal.

SH

Mighty Mouse

· #7 · Jan 26, 2002

Oh yeah, do a simple compression check. That will make you feel at eas to know its the turbo and not the piston.

Peter

Discussion Starter · #8 · Jan 26, 2002 (Edited)

I have done small test - I opened oil cap while engine was running and I did not feel a lot of air pressure = pistons are OK. Turbo(s) are OK too because car is not smoking all the time - while accelerating it is not.

It is smoking very much while braking by engine. I have done another test: accelerating hard up to 7000 rpm (no smoke) and than no touch to gas pedal smoke came - a lot of smoke came while car was slowing down from 7000 rpm to 2000 rpm by itself. I hope I have explained it OK... sorry for my english - it is going down like my engine...

My diagnose is valve stem seal

Not a big deal...

Anyone knows how much do they cost???

Do you agree with my diagnose

Mighty Mouse

· #9 · Jan 26, 2002

VSS is another cause for it to smoke. Mine would only smoke when i would stay at idle for a while then tap or stomp on gas. My car is starting to smoke again but its not consuming oil like it did before. Think vvs are starting to go on mine. If you consume that much oil as you stated, i doubt the vvs would cause that much consumption.

G

· #10 · Jan 26, 2002

It is smoking very much while braking by engine. I have done another test: accelerating hard up to 7000 rpm (no smoke) and than no touch to gas pedal smoke came - a lot of smoke came while car was slowing down from 7000 rpm to 2000 rpm by itself. I hope I have explained it OK... sorry for my english - it is going down like my engine...

Your turbo(s) are going out. No smoke on acceleration and smoke on deceleration is a classic example of it. Coupled with oil in your intercooler piping, that's the problem.

pooshda

· #11 · Jan 26, 2002

My car does the same thing... When I put it in TTC after I blew #2 (im assuming) I could accelerate with no smoke but once I let off BIG white cloud of smoke... Im just going to buy some twins, put them on... and hope for the best, if that doesnt solve the problem I will be SHOCKED...

I was boosting 23psi on twins which were ported, polished, and clipped... I had no boost controller just Bleeder-T and the weather was like 45 degrees outside, I feel it must be turbos... because if you put all those factors into the situation, its very likely... pea shooters dont like those 23-24psi boost spikes, especially while running a stang on the highway when the #2 failed

My turbos do not make the death whine this time around, however... which sorta makes me hope its not something else... But im assuming if the oil seals went out (very likely) then they wouldnt make the death whine anyway, since those two are not associated with each other I do not think.. the death whine comes from actual physical damage to the compressor wheel or bearings, doesnt it?

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G

· #12 · Jan 26, 2002

Why are u just running 95 octane? Dont u guys have 100 octane there?

G

· #13 · Jan 26, 2002

I'm one to agreed it is a turbo seal. That explains the oil in the BOV, and nothing else really can. Where else can oil get into the intercooler tubing?

If you destroy your rings or put a hole in a piston oil will usually be puked out of the dip stick tube. At the very least the dipstick will be pushed out of the tube a little.

Also the smoking on deceleration and not acceleration makes sense. The oil is leaking into your intercooler tubing, which is under pressure (boost) while accelerating. When you are engine braking there is alot of vacumn, thereby "pulling" the oil out of the turbo into the intercooler tubing.

G

· #14 · Jan 27, 2002

yeah it sounds like a turbo to me. On my shelby glhs with an upgraded turbo...the car would smoke at idle and deceleration, but it still boosted fine, but the spool up was much slower.

Peter

Discussion Starter · #15 · Jan 27, 2002

These news make me unhappy

VSS is not a problem but turbo seals is much bigger trouble...

Supramannen

· #16 · Jan 27, 2002

But never race on 95 oct again

I f you do disater may strike

Peter

Discussion Starter · #17 · Jan 27, 2002

OK, We have Shell V Power Racing 99+ . It has more than 99 octane.

But it is very expensive more than $1 per 1 liter

G

· #18 · Jan 27, 2002

you hoofed your turbo , when mine went i broke the main shaft and the oil was draining straight into the exhaust, thats where your smoke is coming from . ps mine was the number one... Kevin just take the turbos out and look for oil on the exhaust side... kevin

Mighty Mouse

· #19 · Jan 27, 2002

you can find some used ones for about 300-600$. Many guys have gone single on theres.

Its not a fun job to do. When i swapped mine out i just changed out the cartridge and left the manifold etc. in its place.

Peter

Discussion Starter · #20 · Jan 28, 2002

My mechanic just called me:

On sixth cylinder I have pressure 6, on all other 11 - 12

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