Waterbug,

I noticed the puff of smoke that came out of the tail pipe in the vid. I see it in the pictures you just posted as well. Have you checked your plugs? Normally when that happens its when you zap a plug or something lets loose. Have you checked the plugs and done a compression test?

If all is good. It may just have been the computer dumping fuel.
Dave

 

Hey Dave... I just bought some new TR-6's today to throw in the car for cheap insurance. But, there was only one bottle sprayed on the current plugs and ~250 miles and they were gaped ~.035 - .040 before. I put them in when I put head studs in.
I figured I would install the new plugs when I do the compression test. Im going to buy the tool over the weekend and see how it goes.

I need to read up on it to see how to do it though.. I have never done it.

 

Cool. See if you had a lean issue in one cylinder it would zap the plug and the the raw fuel would push out the tail pipe. Usually this is black smoke. I cant remember what color yours was. If it was white smoke that is oil...

Doing a compression test is really simple. Screw the tool into the spark plug hole and turn the car over. Make sure the coil packs are unpluged.

Dave

 

Thanks... Will do. There is 102,000 miles on the stock bottom end. Just trying to push the limit. :-)

Oh, and thanks for helping me do it.

 

Also white smoke can sometimes be steam from water entering the cylinder.


Always happy to help..

 

holy ****! makes me worry about mine doin that

 

Ok I will preface my comments by saying that I do not have a N2O system and have very limited experience with. That being said, has anyone though that maybe the hood just broke? From what i see from the hood pics the foam that connects the upper layer of hood to the lower layer of hood is all pushed out of place. Maybe over time the foam glue failed (due to heat, moisture, etc) and the displaced foam allowed the hood to become a giant chaimber. When he was going down the track the hood filled with pressurized air and the seam failed causing the hood to separate. This instantly changed the manifold pressure from "ram air" to air being pulled out of the engine. The reason I say that is because the filter opening is sitting below the air stream and I think that the air passing over the now separated hood would cause a vaccum and lean out the engine. All the engine backfires that i have seen have decimated the top side of engine. In his pictures the filter is still in place. So my vote is hood failure.

 

Good question and yes that would be a possibility. However if you watch his video you will see the puff of smoke out of the tail pipe at the same time.

Im pretty sure he probley also heard the back fire and the car probley ran funny for a minute why the computer struggles to compensate.

 

Here is a good question that would make a difference.. Did the back fire happen before or after the hood lifted. Since the filter is made into the hood I am sure the sudden rush of extra air would have caused a lean condition.

Dave

 

Dude.. The foam is burnt (under the hood where it seat to the top on the filter) and melted to the intake where the filter sits. I know there was a fire in that split 2nd.
What you see is just some foam between the 2 pieces to help channel the air. In no way is it air tight and doesn't allow any air to go to other parts of the hood.
Only reason there was no fire is because I had no air filter in.

 

Hey Dave..

Here are my plugs.. These are from ......#3, 5, and 6.

It went lean do the the NANO bottle not regulating in my book... Like I said before, it was ~950 psi when I took off and when I got back to the pits it was~1300psi. I would imagine that that much of a pressure increase would cause a lean condition. Maybe the lean condition took out the plugs, then the extra fuel wasnt able to burn?? Anyhow, I talked with Brent (or Brett) over there and I sent him my bottle.




Im doing a compression test as well just to see how each cylinder is.

 

Man,
That sucks. I knew you were going to have some hurt plugs. I just hope everything else is ok.
Dave

 

Wow Detonation at it finest.. Let us know what the test came back with..Hopefully the diodes <-- Forget what there called right now..lol passed right through..

 

Just did the compression test..
#1 = 210 #2 = 215
#3 = 205 #4 = 210
#5 = 205 #6 = 190
#7 = 210 #8 = 215

All pretty damn close but the piston #6, witch was one of the cylinders that had a fried plug.

 

Thats what my buddy said... Im starting to wonder if the timing tuned actually pulled timing.

I know we (Nitro Daves & full Throttle) had to get together to make the nitro dave WS and full throttles timing tuner work together. The schematic that was originally drawn up did not work. So, as far as I know, the new shcematic should have worked. Its programed to pull 4* for the 150 shot witch should have been enough. But, with the NANO acting up, whos to know if it just ran lean and melted the plugs or detonation from the timing tuner not doing what its suppose to.

 

Wow, there again I have a timing tuner and I know that there is no way to see the timing being pulled when tuning. That also scares the **** out of me because I will be using that with the Nano. Keep the information coming because I will definitely want and need it.

 

Well, I think the only for sure way to see if timing is being pulled is to get it on the dyno and trick out the noids.. Just turn it up to 9* retard as that should be some noticeable HP loss.

 

Yeah I guess I will have to try that. I'm looking for a tuner now so I will definitely let them know what it is that has happen. Glad that your motor is still good to go as of now. Thanks for all the info and if you get more please share.

 

Ill prolly see if the timing being pulled shows up on EFIlive... I have that and would have liked to have logged the run. But, the track guys get pissed if they see a laptop on the seat.

 

NHRA legal and has passed tech at a few different tracks and by NHRA guys. I was also hassled about a loose laptop, a big no/no around here. it's a police mount for an F-bod modded to fit the Vette.

Robert