| [ Total Views: 728 | Total Replies: 18 | Thread Id: 66193 ] |
|
|
 bags
Slammed & Awesome Dubber
Posts: 79
Threads: 21
Registered: June 20th, 2007
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on November 21st, 2007 at 12:18 AM |
|
|
engine noise
I've had a 2 litre laying around for a while,got it fromn a beetle wreck i bought the only thing i know about it is it's got a roller bearing
crank,anyway i finally got around to putting it in a car to see what happens,fired up without to mutch trouble no smoke sounds smooth go for a
drive,everythings good until i get to a hill and it makes a high pitch tapping sound(like a valve or rockers) when under load, so i back off change
down a gear noise goes away until i give it a boot and the noise comes back,any ideas.
|
|
|
 Bizarre
Super Moderator
The artist formerly known as blue74l
Posts: 12780
Threads: 734
Registered: August 25th, 2002
Member Is Offline
Location: Abbotsford, Sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on November 21st, 2007 at 06:37 AM |
|
|
Sure you are not talking about "pinging"
You 100% the timing is set right?? Sounds like timing to me
Futue te ipsum!!!
|
|
|
Joel
Scirocco Rare
Now containing 100% E-Wang
Posts: 9368
Threads: 211
Registered: February 14th, 2006
Member Is Offline
Location: Northern Rivers NSW
Theme: UltimaBB Pro Purple
Mood: Tact Level 0.00
|
| posted on November 21st, 2007 at 09:25 AM |
|
|
agreed ^^
|
|
|
56astro
Custom Title Time!
Posts: 1772
Threads: 74
Registered: August 25th, 2002
Member Is Offline
Location: The Nambucca
Theme: UltimaBB Pro Blue ( Default )
Mood: Pobjoy Powered with twin ignition & soon to be EFI'd
|
| posted on November 21st, 2007 at 09:39 AM |
|
|
AFAIK roller bearing cranks don't like load,
they like revs.
Could be normal for those cranks, could be that the bearings are shot.
Sorry, can't be more helpful.
VW car, VW engine ...... keepin it "real"
35MPG on 101.3kPa |
|
|
aussiebaja
Insano Dub Head
Posts: 738
Threads: 98
Registered: June 13th, 2006
Member Is Offline
Location: bendemeer
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on November 21st, 2007 at 05:42 PM |
|
|
send the engine to me ,,,ill run it in my baja and when i get the chance ill let ya know whats wrong with it ,,,,lol
BETTER TO BE THOUGHT A FOOL THAN TO OPEN YOUR MOUTH AND REMOVE ALL DOUBT:puke
|
|
|
Craig Torrens
A.k.a.: Craig Torrens
Scirocco Rare
6 times Australian, 7 times State Hillclimb Class Champion
Posts: 8040
Threads: 347
Registered: January 10th, 2003
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Time to go Salt lake racing, and actually achieve a result.
|
| posted on November 21st, 2007 at 09:14 PM |
|
|
Pinging..............check timing and fuel quality.
|
|
|
bags
Slammed & Awesome Dubber
Posts: 79
Threads: 21
Registered: June 20th, 2007
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on November 22nd, 2007 at 12:45 AM |
|
|
it did have a bosch vj4 br8 dizzy in,but there was no condessor,rotor or cap on it,so i put a 009 i had in.
Would too mutch end play on the drive shaft cause it to ping?
I ran it on premium unleaded,could it be possible that the heads have been fly cut for higher compression? needing a higher octane fuel.
Thanks heaps for the info
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on November 22nd, 2007 at 06:43 AM |
|
|
keep the total ignition timing down!!!
Put a timing light on it and start around 26 to 28 degrees at maximum advance.
Your engine may like more but this is a good place to start.
If you keep allowing that your roller crank will be shot.
Yes use good fuel too, but pump fuel that is hi octane should be all you need,
unless it is a racing engine with more than 10 to 1 or some weird chamber or something.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
13bwagon
Officially Full-On Dubber
Posts: 316
Threads: 9
Registered: November 11th, 2006
Member Is Offline
Location: wallabadah
Theme: UltimaBB Pro Blue
|
| posted on November 22nd, 2007 at 12:01 PM |
|
|
| Quote: | Originally
posted by aussiebaja
send the engine to me ,,,ill run it in my baja and when i get the chance ill let ya know whats wrong with it ,,,,lol [/quo
any bigger then a 1200 and your baja would rattle to bits 
|
BUY A REAL BUG A PRE S BUG...
|
|
|
aussiebaja
Insano Dub Head
Posts: 738
Threads: 98
Registered: June 13th, 2006
Member Is Offline
Location: bendemeer
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on November 22nd, 2007 at 04:04 PM |
|
|
nah ,,im a better car builder than that ,,,thanks
BETTER TO BE THOUGHT A FOOL THAN TO OPEN YOUR MOUTH AND REMOVE ALL DOUBT:puke
|
|
|
13bwagon
Officially Full-On Dubber
Posts: 316
Threads: 9
Registered: November 11th, 2006
Member Is Offline
Location: wallabadah
Theme: UltimaBB Pro Blue
|
| posted on November 23rd, 2007 at 08:58 PM |
|
|
| Quote: | Originally
posted by aussiebaja
nah ,,im a better car builder than that ,,,thanks
|
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
OH MAN YOU CRACK ME UP SOME TIMES!!!!!!!!!!!!!!!!!!!!!!!!!!
BUY A REAL BUG A PRE S BUG...
|
|
|
aussiebaja
Insano Dub Head
Posts: 738
Threads: 98
Registered: June 13th, 2006
Member Is Offline
Location: bendemeer
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on November 24th, 2007 at 02:05 PM |
|
|
good on ya lol
BETTER TO BE THOUGHT A FOOL THAN TO OPEN YOUR MOUTH AND REMOVE ALL DOUBT:puke
|
|
|
bags
Slammed & Awesome Dubber
Posts: 79
Threads: 21
Registered: June 20th, 2007
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on December 1st, 2007 at 04:53 PM |
|
|
Ok,I put a timing light on it and brought it down to 26 degrees at total advance,took it for a drive,was better but still pinging.
Drained the fuel tank,went and got 5 litres of bp ultimate 98 octane and a bottle of STP octane bust.They say to use the whole bottle to full tank of
gas,so i put a third of the bottle(350ml) to my 5 litres.went for a drive,heaps better only got a tinny bit of ping,but still with the timming down so
low and the octane boost it still pings,maybe i need some avgas
I thought i'd get some new points and plugs,i'ts got w8ac in at the moment so i went the cooler w7ac and see what happens, all gaps are set and the
timing still at 26 degrees,went for a drive and no ping what so ever,sweet,but i can feel there's more power in this beast so i tried advanceing the
timing a touch,no good it pings even this tiny adjustment,so i brought it back and all is good.
So what does all this tell me,is the engines compression is too high for pump gas,do i need to run it on avgas? or can i put shims in between the
barrels and heads to bring the compression down so i can use pump gas.
any thoughts
|
|
|
Bizarre
Super Moderator
The artist formerly known as blue74l
Posts: 12780
Threads: 734
Registered: August 25th, 2002
Member Is Offline
Location: Abbotsford, Sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on December 1st, 2007 at 07:06 PM |
|
|
OK - am guessing your compression is way to high??
But why??
BEST thing would be to actually check compression
Sadly that means a top end pull down.
if it comes out at say 10:1 - no worries. Shim it and all is well.
If it measures 8:1 - you got other problems
Futue te ipsum!!!
|
|
|
bags
Slammed & Awesome Dubber
Posts: 79
Threads: 21
Registered: June 20th, 2007
Member Is Offline
Theme: UltimaBB Pro Blue ( Default )
|
| posted on December 1st, 2007 at 07:32 PM |
|
|
How do i work out what the compression is.
|
|
|
Bizarre
Super Moderator
The artist formerly known as blue74l
Posts: 12780
Threads: 734
Registered: August 25th, 2002
Member Is Offline
Location: Abbotsford, Sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on December 1st, 2007 at 09:29 PM |
|
|
take the heads off and measure the deck height and the combustion chamber of the heads and compare that to the over all swept area
or click here
http://www.aircooled.net/gnrlsite/resource/specgeninfo/calcs.htm
Futue te ipsum!!!
|
|
|
aussiebaja
Insano Dub Head
Posts: 738
Threads: 98
Registered: June 13th, 2006
Member Is Offline
Location: bendemeer
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on December 2nd, 2007 at 10:25 AM |
|
|
wouldnt it5 be easier too do a commpression test on it first ?
BETTER TO BE THOUGHT A FOOL THAN TO OPEN YOUR MOUTH AND REMOVE ALL DOUBT:puke
|
|
|
Bizarre
Super Moderator
The artist formerly known as blue74l
Posts: 12780
Threads: 734
Registered: August 25th, 2002
Member Is Offline
Location: Abbotsford, Sydney
Theme: UltimaBB Pro Blue ( Default )
|
| posted on December 2nd, 2007 at 04:44 PM |
|
|
No = a compression test tells you if you have compression. ie if it is leaking
Not waht the ratio is.
the only way is to measure things.
From his previous post it seems like he has way too high of a compression ratio
Futue te ipsum!!!
|
|
|
aussiebaja
Insano Dub Head
Posts: 738
Threads: 98
Registered: June 13th, 2006
Member Is Offline
Location: bendemeer
Theme: UltimaBB Pro Blue ( Default )
Mood: happy
|
| posted on December 2nd, 2007 at 04:54 PM |
|
|
oh ok i tought you may be able to do a compression test and work out what your ratio was by the amount of compression,,,,now i think about it more as
i write i see what ya mean ,,,sorry my bad
BETTER TO BE THOUGHT A FOOL THAN TO OPEN YOUR MOUTH AND REMOVE ALL DOUBT:puke
|
|
|
.JPG "Avatar")
