uh oh...maybe damage after high speed run
Thread Starter
Melting Slicks
Joined: Jan 2001
Posts: 2,635
Likes: 2
From: Aloha, Oregon
uh oh...maybe damage after high speed run
well, it looks like i jinxed it after all. i hope not. i got the car up to very high speed yesterday while racing, as most of you know. well, i failed to mention until further into the thread that when i was leveling out, the motor was making a little bit of gurgling/pinging. i could barely hear it, but at those speeds, no wonder. well, i finally drove my car the first time since. there is a sharp kackle in the exhuast on deceleration. but, i do not have any mufflers on the car. therefore, there has always been a little bit of this when car was cold. well, i got the car warm and it didnt go away. very distinct kackle that wont go away now. DAM. the car feels ok, though. any thoughts?
Race Director
Joined: Mar 2001
Posts: 10,030
Likes: 10
From: Prescott AZ
St. Jude Donor '04
Re: uh oh...maybe damage after high speed run (MitchellDavidson)
Ya, I think that sucks. :nonod:
Let me know when the next time your going to run a top speed run. I would have to see it to belive that you did 217. :bs
Burning Brakes
Joined: Sep 2001
Posts: 1,173
Likes: 1
From: Aguila AZ
Re: uh oh...maybe damage after high speed run (rwj383)
Robert,
While you have the plugs out, give it a compression check... That's the best way to identify any piston/valve/ring damage after a heavy NOX run... Believe me, I have a lot experience in this area...
Shirl :D
While you have the plugs out, give it a compression check... That's the best way to identify any piston/valve/ring damage after a heavy NOX run... Believe me, I have a lot experience in this area...
Shirl :D
Team Owner
Joined: Sep 2000
Posts: 46,788
Likes: 37
From: Va. Beach Va.
Re: uh oh...maybe damage after high speed run (rwj383)
Like the above post check your plugs, do a compression test and also drain your oil and look for fine shavings (bearings,etc)..Good luck I hope your engine is ok.. :cheers:
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Thread Starter
Melting Slicks
Joined: Jan 2001
Posts: 2,635
Likes: 2
From: Aloha, Oregon
Re: uh oh...maybe damage after high speed run (ZO6LS6)
Define "Kackle"....
You think you sucked a chicken into the intake at those speeds??. :eek:
You think you sucked a chicken into the intake at those speeds??. :eek:
Race Director
Joined: Jan 2000
Posts: 15,707
Likes: 1
From: Lynnfield MA
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In VI Veteran
Re: uh oh...maybe damage after high speed run (rwj383)
Pull plugs & check compression and do a leak down test. If you find there is a compression issue, first check pushrods then start possibly looking for a bent valve stem... Just a process of elimination... Sorry about your misfortune man!
Nick
Nick
Le Mans Master
Joined: Apr 1999
Posts: 7,820
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From: Burlington ON
Cruise-In I, II, III, IV & V Veteran
CI-I & II Auto-X Champ
Re: uh oh...maybe damage after high speed run (2000^C5)
Maybe its a damaged head gasket? The compression/leak down test should tell you the story.
Drifting
Joined: Oct 2001
Posts: 1,366
Likes: 0
From: America
Re: uh oh...maybe damage after high speed run (Smoke-N-Shot)
If the engine is still strong, and this is the sound/only one it's making......I agree, comp test, and look at the valve train.............
Fuel is evidently combusting in the exhaust area........raw....plug/s, could be damaged.
Fuel is evidently combusting in the exhaust area........raw....plug/s, could be damaged.
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: uh oh...maybe damage after high speed run (rwj383)
:cry Uh, RWJ, didn´t want to heas that!!
1) What are your plugs gapped at??
Mine are gapped .34 on 200 shot runs!!!!!!!!
2) Also what octane did you use??
I don´t use less than 99 Octane.
I read .94 to 1.00 O2`s on my NOS runs...damn rich, but therefore
NO pinging!! Maybe you were too lean :(
Mabe you run out of fuel pressure?? That´s why I have an Autometer
fuel pressure gauge and have 60-61PSI during the runs.
On NOS you cannot be careful enough!!!
1st Check your plugs!!!!
2nd Check compression, your head gaskets may be gone
3rd Maybe the piston rings are not in perfect shape now :(
4th I hope you didn´t damage your drivetrain.
5th Do you have cats???? You may have burnt them!!!
I´m no mechanic, but however, post all news and I´ll try to help you out as good as I can!!!
Hi Speed junkies hold together, my friend........we will find out what doesn´t work well !!!!!
BTW, I´ll see what my internal engine looks like after the big NOS runs
next month, wehn I do the heads/cam swap.
Good luck and let me know!!!
Michael
[Modified by Austrian Vette, 6:48 PM 1/12/2002]
1) What are your plugs gapped at??
Mine are gapped .34 on 200 shot runs!!!!!!!!
2) Also what octane did you use??
I don´t use less than 99 Octane.
I read .94 to 1.00 O2`s on my NOS runs...damn rich, but therefore
NO pinging!! Maybe you were too lean :(
Mabe you run out of fuel pressure?? That´s why I have an Autometer
fuel pressure gauge and have 60-61PSI during the runs.
On NOS you cannot be careful enough!!!
1st Check your plugs!!!!
2nd Check compression, your head gaskets may be gone
3rd Maybe the piston rings are not in perfect shape now :(
4th I hope you didn´t damage your drivetrain.
5th Do you have cats???? You may have burnt them!!!
I´m no mechanic, but however, post all news and I´ll try to help you out as good as I can!!!
Hi Speed junkies hold together, my friend........we will find out what doesn´t work well !!!!!
BTW, I´ll see what my internal engine looks like after the big NOS runs
next month, wehn I do the heads/cam swap.
Good luck and let me know!!!
Michael
[Modified by Austrian Vette, 6:48 PM 1/12/2002]
