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Cam advanced 30 degrees! HP loss? #1038716
07/23/11 09:51 PM 07/23/11 09:51 PM
Joined: Feb 2010
Posts: 1,377
Ohio
Todd Offline OP
pro stock
Todd  Offline OP
pro stock

Joined: Feb 2010
Posts: 1,377
Ohio
Had the car out for the first time a few weeks ago and the engine felt really flat. Tried advancing the timing did help some but still felt flat. When we got home my Dad wanted to try and power time it and it started to really wake up. But checked the timing and it was at 55 degrees! So I took it apart and checked the TDC and the cam timing and found out that the cam intake center line is at 76 degrees! So looked at the timing marks on the timing gears and their off by 3 teeth. I then lined it up line it should and rechecked the centerline and now at 106 like it was suposed to have been. Reassembled and runs like a comlpete different motor. It was 2 years ago when it was assembled and I was getting ready for my deployment to Iraq and had my mind on other things. Thats my excuse and im sticking to it! I cant believe it ran this way!

6743864-0416091755b.jpg (92 downloads)
Last edited by Todd; 07/25/11 12:08 PM.
Re: Cam advanced 30 degrees! [Re: Todd] #1038717
07/23/11 10:14 PM 07/23/11 10:14 PM
Joined: Jan 2003
Posts: 4,852
KENTUCKY
69CHARGERMD Offline
master
69CHARGERMD  Offline
master

Joined: Jan 2003
Posts: 4,852
KENTUCKY
congrats,,,,should run like a beast now....

Re: Cam advanced 30 degrees! [Re: Todd] #1038718
07/23/11 10:37 PM 07/23/11 10:37 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
I'm suprized the pistons didnt hit... they must be
down the hole a fair bit or the cam doesnt have much lift
Re: Cam advanced 30 degrees! [Re: MR_P_BODY] #1038719
07/23/11 10:43 PM 07/23/11 10:43 PM
Joined: Feb 2010
Posts: 1,377
Ohio
Todd Offline OP
pro stock
Todd  Offline OP
pro stock

Joined: Feb 2010
Posts: 1,377
Ohio
The pistons are zero deck have reliefs in them The cam has .533 lift. I cant believe that they didnt hit. When I ran it struggled to get to 6k.
Re: Cam advanced 30 degrees! [Re: Todd] #1038720
07/24/11 01:09 AM 07/24/11 01:09 AM
Joined: Oct 2010
Posts: 2,407
Ambridge, Pa.
R
rickraw Offline
top fuel
rickraw  Offline
top fuel
R

Joined: Oct 2010
Posts: 2,407
Ambridge, Pa.
nice lookin power plant

Re: Cam advanced 30 degrees! [Re: rickraw] #1038721
07/24/11 12:09 PM 07/24/11 12:09 PM
Joined: Mar 2005
Posts: 2,489
Pacifica, CA
Devilbrad Offline
top fuel
Devilbrad  Offline
top fuel

Joined: Mar 2005
Posts: 2,489
Pacifica, CA
I had a similar problem on a bone stock 5.2 Magnum engine in my Dakota. Put a new Comp Cams timing set on it, never ran after that. Moved across country, played around with it for a while and finally decided to check cam center line. Same thing, dot was three teeth off on the cam gear. EFI engines luckily wont run like that, LOL
Re: Cam advanced 30 degrees! [Re: Devilbrad] #1038722
07/24/11 12:54 PM 07/24/11 12:54 PM
Joined: Oct 2008
Posts: 99
USA
B
BB Dart 69 Offline
member
BB Dart 69  Offline
member
B

Joined: Oct 2008
Posts: 99
USA
Thank You for your service

Re: Cam advanced 30 degrees! [Re: BB Dart 69] #1038723
07/24/11 03:54 PM 07/24/11 03:54 PM
Joined: Nov 2005
Posts: 808
mckinney texas
S
shoebox Offline
super stock
shoebox  Offline
super stock
S

Joined: Nov 2005
Posts: 808
mckinney texas
Quote:

Thank You for your service



ditto! to all our servicemen on here

74 dart sport 440 www.Csucarbs.com
Re: Cam advanced 30 degrees! [Re: shoebox] #1038724
07/24/11 05:40 PM 07/24/11 05:40 PM
Joined: Feb 2010
Posts: 1,377
Ohio
Todd Offline OP
pro stock
Todd  Offline OP
pro stock

Joined: Feb 2010
Posts: 1,377
Ohio
Quote:

Quote:

Thank You for your service



ditto! to all our servicemen on here




Thank You! After years of active and reserve duty I Have about a year left until retirement.

Re: Cam advanced 30 degrees! [Re: Devilbrad] #1038725
07/24/11 05:50 PM 07/24/11 05:50 PM
Joined: Feb 2010
Posts: 1,377
Ohio
Todd Offline OP
pro stock
Todd  Offline OP
pro stock

Joined: Feb 2010
Posts: 1,377
Ohio
Quote:

I had a similar problem on a bone stock 5.2 Magnum engine in my Dakota. Put a new Comp Cams timing set on it, never ran after that. Moved across country, played around with it for a while and finally decided to check cam center line. Same thing, dot was three teeth off on the cam gear. EFI engines luckily wont run like that, LOL



When I checked the marks on the gears there were no dots on the crank gear. So when it was assembled the keyway ended up being where the dot was. That ended up being 3 teeth off. Now looking back I should have degreed it then and found TDC. That put the crank keyway at about the 1 oclock position. This was my first big block. I guess I learned the hard way.
Re: Cam advanced 30 degrees! [Re: BB Dart 69] #1038726
07/24/11 06:05 PM 07/24/11 06:05 PM
Joined: May 2009
Posts: 831
Missouri
G
galen Offline
super stock
galen  Offline
super stock
G

Joined: May 2009
Posts: 831
Missouri
Quote:

Thank You for your service

Same here, Nothing but respect for anyone in the military.
Re: Cam advanced 30 degrees! HP loss? [Re: galen] #1038727
07/24/11 08:38 PM 07/24/11 08:38 PM
Joined: Feb 2010
Posts: 1,377
Ohio
Todd Offline OP
pro stock
Todd  Offline OP
pro stock

Joined: Feb 2010
Posts: 1,377
Ohio
Thanks again!

I was wondering what the ET loss or even HP loss was with it off that far. If recall it went 8.20 in the 1/8. According to the moroso calulator it should be close to 6.50. Is it possible to gain that much?

Last edited by Todd; 07/25/11 11:53 AM.
Re: Cam advanced 30 degrees! HP loss? [Re: Todd] #1038728
07/25/11 01:55 PM 07/25/11 01:55 PM
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Quote:

Thanks again!

I was wondering what the ET loss or even HP loss was with it off that far. If recall it went 8.20 in the 1/8. According to the moroso calulator it should be close to 6.50. Is it possible to gain that much?

It will run a bunch better now I had a erson roller cam that was off 10 degrees on the pin location, it was a boat mottor and wouldn't rev past 3000 RPM in the boat. It is not uncommon to use the wrong marks on the crank gear when aligning the marks, don't ask me how I know even more than once You must use the outer marks on the gears, not the inner marks above the keyways I have seen the cam gear mark off one tooth(12 degrees) also You must degree every cam every time

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Cam advanced 30 degrees! HP loss? [Re: Cab_Burge] #1038729
07/25/11 02:01 PM 07/25/11 02:01 PM
Joined: Feb 2010
Posts: 1,377
Ohio
Todd Offline OP
pro stock
Todd  Offline OP
pro stock

Joined: Feb 2010
Posts: 1,377
Ohio
From now on no matter how big a hurry I am I will always degree the cam. I still cant believe it ran as well as it did. Just felt really flat.
Re: Cam advanced 30 degrees! HP loss? [Re: Todd] #1038730
07/25/11 02:35 PM 07/25/11 02:35 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Quote:

Thanks again!

I was wondering what the ET loss or even HP loss was with it off that far. If recall it went 8.20 in the 1/8. According to the moroso calulator it should be close to 6.50. Is it possible to gain that much?



Hell with it being that far off I'm suprized it even
ran let along not breaking parts... I had a roller
cam that the key way was off 27* and it crashed the
pistons... I just lined up the dots to get a base line
before starting to do the degreeing

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