MustangWorks.com - The Ford Mustang Power Source!

Go Back   MustangWorks.com : Ford Forums > Mustang & Ford Tech > Windsor Power
Register FAQ Members List Calendar

Notices


Reply
 
Thread Tools Rate Thread Display Modes
Old 05-15-2007, 10:43 PM   #1
331stroker
Registered Member
 
Join Date: May 2007
Posts: 10
Angry valve clatter

I have a 331 stroker with a holly systemmax 2 ,longtub headers ,accell ignition, 30lb injectors,190gpa fuel pump,fulthan urthan syspension, holly fuel pressure regulator, forged crank, h-beam rods,arp bolts,upgraded centerforce dual-friction kevlar button clutch. Stock ecu and programming
Here is my problems 1. I have a air/fuel mix guage which I know are inaccurate. At Idle or if I hold the gas at a certain rpm it idles up and down about 200 rpm and back up fluxuating at the same the rpms drop i run lean.
problem 2. I have valve clatter up to 2000 rpm unless I accerate heavly. I have about 80 psi oil pressure any info is great

Last edited by 331stroker; 05-16-2007 at 05:43 PM.. Reason: incorrect fuel pump
331stroker is offline   Reply With Quote
Old 05-20-2007, 10:14 PM   #2
goodyear1984
Registered Member
 
Join Date: Dec 2006
Location: new york
Posts: 482
Default Re: valve clatter

for your lean condition...the a/f gauges are only accurate with a wide band o2 sensor .....you prolly need to set the valve lash..
__________________
347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
goodyear1984 is offline   Reply With Quote
Old 05-22-2007, 04:16 PM   #3
USMC302
Registered Member
 
USMC302's Avatar
 
Join Date: Apr 2001
Location: Gallatin, Tn
Posts: 1,326
Default Re: valve clatter

1. As goodyear stated, a wideband will be more accurate than an off the shelf air/fuel meter. What are the readings your getting from your current one? What is your FP set at?
2. You didn't mention heads or an aftermarket valve train so I'm assuming it's stock and non-adjustable still. If you changed valve covers, some are a little thinner and allow more noise to come through, on the other hand, be sure all rockers are tight and get a mechanical oil pressure gauge to really see what your oil pressure is doing throughout the RPM range.
3. Last but not least, you mentioned 30lb injectors but with stock ECU and programming. Are you a speed density or Mass Air car, you never mentioned the year, If mass air car, did you get the meter calibrated for the injectors?
__________________
USMC302 is offline   Reply With Quote
Old 05-23-2007, 08:31 AM   #4
331stroker
Registered Member
 
Join Date: May 2007
Posts: 10
Default Re: valve clatter

Ok my car is a 1990 stang. It is mass air and the fuel pressure is set at about 44psi. Some time a/f will not even register at low rpms about 3500 and up it runs semi rich. Yes they are aftermarket sheet metal valve covers . I have the Ford Racing 1.6 blue roller rockers. I nomaly have 80-90psi of oil through the whole range but at idle is were you see 75-80 psi. I have a C&L 76mm mass air meter and it has been calibrated to the 30lb injectors . As for the heads the Holly SyS max2 comes with 61cc heads, and intake, the cam 221/223 duration at .050, .509/.509 in lift with 107 deg lob separtion, hardened pushrods
331stroker is offline   Reply With Quote
Old 05-23-2007, 09:48 AM   #5
USMC302
Registered Member
 
USMC302's Avatar
 
Join Date: Apr 2001
Location: Gallatin, Tn
Posts: 1,326
Default Re: valve clatter

Awesome, ok, the air/fuel ratio is at exactly what? It's normal to jump around at idle, the computer tries to achieve a 14.7 mix, you need a real air/fuel meter to really tell how lean or rich it's running. The sheetmetal valve covers will def let tons of valve chatter out, but it's still safe to go ahead and be sure the valve lash is set, if you take the valve covers off, make sure none of the roller rockers are loose enough that you can lift one off the valve, side to side movement is ok, just not up and down. Most of the time they will need to be re adjusted after the first few hundred miles or so anyway. The oil pressure will generally be lower at idle and higher though the rpm range, nothing out of the ordinary there. Your fuel pressure sounds extremely high for 30lb injectors N/A. You should try bringing it down to around 35-38 for a test run at the track, don't pay attention to ET, look at MPH, take away fuel until you slow down.
__________________
USMC302 is offline   Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
EGR Valve SlamedDawg Small Ponies 2 10-09-2003 01:29 AM
Valve guide or valve seal? Hozer 88GTConv Windsor Power 10 01-21-2003 03:08 PM
PCV Valve ? Cody2552 Windsor Power 4 01-15-2003 06:50 AM
I am hearing valve clatter... cyberstang5.0 Windsor Power 1 04-12-2002 08:58 AM
Pcv Valve??? BowTie Eater 5 Liter Windsor Power 5 12-07-2001 07:46 PM


All times are GMT -5. The time now is 06:27 AM.


SEARCH