No catch can?

 

You mean wet or dry sump? No, but not a bad idea to have it.

 

A catch can is in the PCV system to help keep oil from getting put back into the intake track. I put one on mine as these cars like to spew lots of oil into the intake tract that will cover everything.

 

It is just a wild guess on my part that a catch can could be of use to you because the blue smoke might just be lots of oil being blown in to your intake since you are at such a high boost, and that it might not be damaged rings...

I say this with the disclaimer that I am not a mechanic, and don't really know, but since I think it is a possibility, I though I would throw it out there.

Catch cans are cheap and very easy to install, so I think it would be worth a try to get a good one and put it on.

 

I noticed my car stopped blowing blue smoke on startup after I installed the catch can.

 

This is good news and makes me hopeful that XJR-99s blue smoke may not be a big problem, and may go away after installing a good catch can.

Given he is running so much boost, and as you said, these tend to spew a lot of oil into the intake track, the catch can might solve this problem.

There may be other problems, but at least, this one is easy, cheap, and fast to try.

Given he said it got worse when he added oil, it might be related to some venting issue....or not...

 

This is who I went with:

Billet Technology Signature Series Catch Can 5.7 or 6.1 Hemi Engines

I had to modify the plastic hose to work with the catch can (cut and used high heat/strength adhesive) to get it to work. Also made a custom mount. So far no issues.

 

@Micheal

Always try to find a root cause with anything you might experience. Just an inbalance in the flow of the 2 engine breathers can already cause more oil to come thru on the 4.2 str and cause the blue smoke on startup.

When looking at a picture of your intake, you have a larger diameter lh side breather allowing more flow, that can already cause your blue smoke issue. You must keep it the same size as original.

 

So where is your low 12 second new purchase? Photos please I'm curious what you got.


Other than getting the nitrous working, my car is now DONE ! YEAH!

I totaled all costs, and it adds up to a little less than $16,000 including all new maintenance parts and all upgrades. Thanks ebay

 

If oil is being sucked into the vacuum side of the inlet, remove your intercoolers and get the residue out as soon as you can, before it clogs them and restricts flow and reduces heat transfer.
if you want to test the catch can theory before buying one, make one out of a glass jar and some hose, it wont take long to see the amount of oil you are losing, remember it needs to be fully sealed.- 4 or 5 drops of oil will give smoke

 

Hey xjr-99 any updates on what was wrong ?

 

What gears are in the rearends? Whats the rear suspension 3 link 4 link? You don't want to drag race with the traction control on,you need to get some better tires like a pair of micky Thompson drag radials. Then at the track foot brake it till the tires just start to break loose. Remember going threw the water box unless you have skinny front tires is no good as well as doing a burn out on street tires. Are these cars uni bodies or full frame? And just saying my buddies 08 335i BMW made 406/447 to the wheels and runs 11.6 on drag radials with a 1.7 60'

 

The car was in a shop today. The blue smoke problem was over 3-4 days after the race. Cylinder pressure ( 125-133PSI ) and engine leakdown ( 10-14% ) tests were ok in all cylinders. Breather hoses were not clogged. At the same time plugs were changed to one range colder NGK Iridiums. The filter inside the oil sump was 70-80% clogged. It was washed as well as the sump. Oil was changed to 10-60W racing oil.

 

So is everything working properly now?

Have a look at the Kenne Bell website. There is a write up there of why they think the Denso U-groove 1 step colder spark plugs are better than the iridium.

 

I guess the old problem is still there. Need some 0-120mph tests to see it.

 

I'm happy to hear there is no obvious major damage!

What brand of oil are you using now?
Have you done a dyno with a continuous AFR readout?


Off topic, but I just added photos of this "new" 2000 xjr mods to my garage.

 

Oil: LIQUI MOLY - Motor Oils, Additives, Car Care - Products - Racing Synth 4T 10 W-60 . It was dynod with AFR.

 

What is a good head gasket brand choice for engines with nitrous or lots of boost? Thank you, Louis

 

I do not know, but the 4.2 gaskets are considered thicker and better. I had been advised to swap to the 4.2 gaskets for my 4.0 if I ever took the heads off, and to switch to the ARP head studs.

 

The 4.2 oem ones are actually thinner and are MLS compared to the thicker 4.0 composite ones. This raises the compression a little, but nothing to worry about, would also recommend the 4.2 ones without any doubts.

When will you do the dyno?