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Just returned from the track....Something is wrong!!!
#254881
03/15/09 07:41 PM
03/15/09 07:41 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
OP
Banned. Forever.
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OP
Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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Took the 68 Barracuda to the track today. Something isnt right. The basics of the combo are a 360, Edelbrock RPM 65cc heads (OOTB), 11.2:1, 292/509 cam, Weiand X-celerator, 750DP, Hooker 1 5/8" headers, 2 1/2" exhaust, Holley Blue pump (still running 5/16" line), 4-speed, 4.10 SG on 275/60-15DR's. The car was hooking fine launching at 4800 rpm. Ill list the details of the timeslip below...
60'---1.841
330'---5.374
1/8---8.408
1/8 MPH---82.98
1000'---10.912
1000' MPH---95.00
1/4 ET---13.125
1/4 MPH---106.03
That was the best run of the day. I made a total of 6 passes and each one got slower and slower.
The only thing I changed was I went from a Action Plus to the X-celerator manifold, and installed a new timing set. It sounds like a stupid question, but could I have installed the timing set a tooth off or something or could it be running out of fuel on the top end because of the 5/16" line? It has 3-5in of vacuum at 900-1000rpm. It just seems lazy. It wont even break the tires loose in first gear on the street. Anyone have any ideas? I figured this thing would run way better than what it did.
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Re: Just returned from the track....Something is wrong!!!
[Re: Posest]
#254886
03/15/09 09:00 PM
03/15/09 09:00 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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You can cut the timing back 3-4 degrees, but it's not gonna help you out much. You need atleast a 3/8" fuel line - and thats out of the tank. To run in the low to mid 12"s, which is where you should be running, your fuel pump should be able to fill a one gallon can in about 30 seconds - minimum - and thats measured from where the fuel line connects to the carb. Forget what the pump MFG. tells you. You need to actually check it to be sure. Your 60 foot times are off about a tenth and 1/2 also, indicating you have a traction problem.
Fastest 300
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Re: Just returned from the track....Something is wrong!!!
[Re: Crizila]
#254887
03/15/09 09:05 PM
03/15/09 09:05 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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You also have engine issues with only 3-5 " of vacuum at idle. You should have atleast 12" @ idle with your combo. Sounds like you have a pretty hefty vacuum leak somewhere.
Fastest 300
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Re: Just returned from the track....Something is wrong!!!
[Re: Crizila]
#254888
03/15/09 09:10 PM
03/15/09 09:10 PM
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Joined: Nov 2007
Posts: 21,814
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,814
Kirkland, Washington
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Quote:
You can cut the timing back 3-4 degrees, but it's not gonna help you out much. You need atleast a 3/8" fuel line - and thats out of the tank. To run in the low to mid 12"s, which is where you should be running, your fuel pump should be able to fill a one gallon can in about 30 seconds - minimum - and thats measured from where the fuel line connects to the carb. Forget what the pump MFG. tells you. You need to actually check it to be sure. Your 60 foot times are off about a tenth and 1/2 also, indicating you have a traction problem.
He has a traction problem alright! He states above that he can't even break em loose in first on the street! The fuel line is the last of his worries. Degree/advance the cam, make sure no vacuum leak.
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Re: Just returned from the track....Something is wrong!!!
[Re: 69L78Nova]
#254890
03/15/09 09:38 PM
03/15/09 09:38 PM
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Joined: Nov 2007
Posts: 21,814
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,814
Kirkland, Washington
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Quote:
Just checked vacuum at idle again. Was around 3-4in at 900rpm. Cranking compression was 140 across all 8
Do you know what your vacuum was BEFORE the timing chain swap???
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Re: Just returned from the track....Something is wrong!!!
[Re: Pacnorthcuda]
#254892
03/15/09 09:41 PM
03/15/09 09:41 PM
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Joined: Dec 2007
Posts: 7,759
So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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Quote:
Quote:
You can cut the timing back 3-4 degrees, but it's not gonna help you out much. You need atleast a 3/8" fuel line - and thats out of the tank. To run in the low to mid 12"s, which is where you should be running, your fuel pump should be able to fill a one gallon can in about 30 seconds - minimum - and thats measured from where the fuel line connects to the carb. Forget what the pump MFG. tells you. You need to actually check it to be sure. Your 60 foot times are off about a tenth and 1/2 also, indicating you have a traction problem.
He has a traction problem alright! He states above that he can't even break em loose in first on the street! The fuel line is the last of his worries. Degree/advance the cam, make sure no vacuum leak.
I agree, check for vauum leaks, and degree cam.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Just returned from the track....Something is wrong!!!
[Re: 69L78Nova]
#254893
03/15/09 09:44 PM
03/15/09 09:44 PM
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Joined: Dec 2007
Posts: 7,759
So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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Quote:
The only thing I changed was I went from a Action Plus to the X-celerator manifold, and installed a new timing set.
Some gear sets have been known to be drilled incorrectly.
You never mention what you ran before.
Is it possible you bent a valve, changing the timing set? Did you turn the crank when the cam gear was off?
Last edited by HealthServices; 03/15/09 09:46 PM.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Just returned from the track....Something is wrong!
[Re: ph23vo]
#254898
03/15/09 11:31 PM
03/15/09 11:31 PM
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Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post
master
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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I'm running a 260/266 @ .050" cam and I've got 6 1/2" of vac. As mentioned, I'd degree the cam first [ EDIT: set the timing] then check for vac leaks. 
Last edited by 64Post; 03/15/09 11:54 PM.
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Re: Just returned from the track....Something is wrong!
[Re: 69L78Nova]
#254900
03/16/09 12:24 AM
03/16/09 12:24 AM
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Joined: Dec 2007
Posts: 7,759
So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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After you get the cam gear straighten out, do a leak down. Just to make sure you did not kiss a valve in the past.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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