shudder at high rpm shift

Old 08-22-2010, 10:53 AM
  #1  
erikparker
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Aug 2010
Posts: 10
Default shudder at high rpm shift

Hello every one New to this site so take it easy on me. I have a rebuilt ford 360fe that shudders at high rpm(3800-4000) when shifting from first to second gear. I have no idea what may cause this! Ill give some quick facts/spec on the 360.

.30 over
Eddelbrock performer intake
eddelbrock 750 carb
new timing set installed @4 deg advanced
new cam and lifters adv duration 272/282 gross lift .460/.480
9 inch rear end with 3.33
stock dis
TCI streat fiter c6 trans with 2000 stall converter

Any help advice would be great. Thanks in advance.!!
erikparker is offline  
Old 08-22-2010, 06:52 PM
  #2  
TheRabbit
Senior Member
RACING JUNKIE
 
TheRabbit's Avatar
 
Join Date: Jan 2007
Location: Augusta, Ga.
Posts: 2,295
Default

Shudder like skipping or out of balance?
Never messed with a 360 Ford, but the 429 and 460 have or don't have a weight on the flywheel that will cause one to vibrate if you don't have the right balancer.
TheRabbit is offline  
Old 08-24-2010, 11:55 AM
  #3  
erikparker
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Aug 2010
Posts: 10
Default shudder at high rpm

Hello, The shudder feels like the thing is going to die. If you let off and shift into third/drive everthing becomes normal. It almost feels like a timing or fuel thing but I am unshure. Im running a 95gpm fuel pump. The heads may even be bad. They have about 80k on them. I dont know what to do or where start? :?: :!:

Any help will be nice. Thanks for the reply.
erikparker is offline  
Old 08-24-2010, 12:25 PM
  #4  
TheRabbit
Senior Member
RACING JUNKIE
 
TheRabbit's Avatar
 
Join Date: Jan 2007
Location: Augusta, Ga.
Posts: 2,295
Default

I would start with making sure it's getting fuel. Check fuel filter / pump, carb and distributor and make sure you do not have any vacuum leaks.
TheRabbit is offline  
Old 08-24-2010, 12:49 PM
  #5  
curtisreed
Senior Member
RACING JUNKIE
 
curtisreed's Avatar
 
Join Date: Feb 2004
Location: KIEFER, OK.
Posts: 1,311
Default Re: shudder at high rpm

Originally Posted by erikparker
Hello, The shudder feels like the thing is going to die. If you let off and shift into third/drive everthing becomes normal.
This makes it sound like fuel is a possibility. I know zero about Edelbrock carbs but your float level could be low or there could be a restriction somewhere in your system.

Curtis
curtisreed is offline  
Old 08-24-2010, 04:07 PM
  #6  
erikparker
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Aug 2010
Posts: 10
Default shudder at high rpm

Thanks, Ill check out the fuel system as well as the flot levels. Ill put out a post to let you all know what i find. I wount really know until our test tune night. Well maybe ill have my self a test and tune night on some back road???

Thanks for the help!!!
erikparker is offline  
Old 08-26-2010, 10:52 PM
  #7  
cepx111
Senior Member
RACING JUNKIE
 
Join Date: May 2006
Posts: 2,044
Default Re: shudder at high rpm

Originally Posted by doorracer
Originally Posted by erikparker
Hello, The shudder feels like the thing is going to die. If you let off and shift into third/drive everthing becomes normal.
could be a restriction somewhere in your system.Curtis
X2 Sounds like a classic case of a stopped up fuel filter to me, that or a bad fuel pump not keeping the pressure.


Goodluck>Cp
cepx111 is offline  
Old 08-27-2010, 03:29 PM
  #8  
TheYellaBrick
Senior Member
RACING JUNKIE
 
TheYellaBrick's Avatar
 
Join Date: Mar 2008
Location: Emmett, Idaho
Posts: 7,334
Default


What RPM is this 'shuddering' taking place ?

To me, 'SHUDDERING' means something out of balance and comes and goes sorta gradually and can be felt in more of a seat of the pants way
..
'STUTTERING' IE; 'MISSING' has a more defined start/stop is an AUDIBLE sensation, and is a fuel/ignition issue.
TheYellaBrick is offline  
Old 08-28-2010, 08:40 AM
  #9  
erikparker
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Aug 2010
Posts: 10
Default

I dont think its out of ballance. I think we are on to somthing with the fuel system. I havent had achance to work on it this week. hope to have some time this weekend to check out the fuel system. The shudder/miss/stumble only happens at 3800 to 4000 rpm. @ idle and off idle it is fine. It ony happens when im on it hard and shifting out of first. We will see what happens.

Thanks for all help.
erikparker is offline  
Old 08-28-2010, 08:47 AM
  #10  
lively
Senior Member
RACING JUNKIE
 
lively's Avatar
 
Join Date: Nov 2004
Location: ILLINOIS
Posts: 2,191
Default

AND your sure you have not got a tranny issue :cry: :cry: :cry: ???????
lively is offline  

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service