• 7 Vote(s) - 4 Average
  • 1
  • 2
  • 3
  • 4
  • 5
What did you do to your car today?
(11-04-2018, 09:47 AM)Carolina_Mountain_Mustangs Wrote: What I have stated is not an opinion but stressed by all cam manufacturers. Racing cam profiles and lifters will never last like a stock set up. Many want you to do very specific break in periods and may even ask you to break in with less spring pressure than when you are actually racing.
Due to the heavy spring pressure and the quicker and higher lifts the pressure on the cam and lifter is many times more than with a stock cam. When I worked in race engine shop the boss never let a built engine idle less than 900 to help save the cam. Even at that when we would tear them down that had been driven on street never saw one that was not junk after just a few miles. How many circle track cars do you hear loping at low rpm or professional drag cars? They are torn down quite often and everything changed. If you have a flat tappet cam the lifters do not rotate at lower rpm therefore causing more wear. Also the lubrication at a low idle is just not there. That is why only one or two lobes might wear more than others not the same amount of lube.
Racing parts are made to be ran not sit and idle. Talk to the cam manufacturer and see what they suggest for an idle speed and do some research. I think you will find that high lift cams with heavy valve springs will not hold up in the long run.
Here is some reading on cams there are dozens of sites and none will say to let a cammed up engine idle low. https://www.camcraftcams.com/some-though...fter-wear/

When you put a new engine together get a long travel dial indicator and take actual readings of the valve travel perpendicular to the valve. Check over time to see how the cam and lifters are holding up.
That is one of the benefits of the new engines today like the Coyote with their tiny little valves of less than 1" in diameter and very small springs. They do have 4 valves to make up for size.
Yes if you only drive to a few shows you will probably never have an issue but built engines just do not have a long life.

Guess with 11,000 on mine now I should plan a rebuild immediately then.................
  Reply
(11-05-2018, 11:37 AM)Tnfastbk Wrote:
(11-04-2018, 09:47 AM)Carolina_Mountain_Mustangs Wrote: What I have stated is not an opinion but stressed by all cam manufacturers. Racing cam profiles and lifters will never last like a stock set up. Many want you to do very specific break in periods and may even ask you to break in with less spring pressure than when you are actually racing.
Due to the heavy spring pressure and the quicker and higher lifts the pressure on the cam and lifter is many times more than with a stock cam. When I worked in race engine shop the boss never let a built engine idle less than 900 to help save the cam. Even at that when we would tear them down that had been driven on street never saw one that was not junk after just a few miles. How many circle track cars do you hear loping at low rpm or professional drag cars? They are torn down quite often and everything changed. If you have a flat tappet cam the lifters do not rotate at lower rpm therefore causing more wear. Also the lubrication at a low idle is just not there. That is why only one or two lobes might wear more than others not the same amount of lube.
Racing parts are made to be ran not sit and idle. Talk to the cam manufacturer and see what they suggest for an idle speed and do some research. I think you will find that high lift cams with heavy valve springs will not hold up in the long run.
Here is some reading on cams there are dozens of sites and none will say to let a cammed up engine idle low. https://www.camcraftcams.com/some-though...fter-wear/

When you put a new engine together get a long travel dial indicator and take actual readings of the valve travel perpendicular to the valve. Check over time to see how the cam and lifters are holding up.
That is one of the benefits of the new engines today like the Coyote with their tiny little valves of less than 1" in diameter and very small springs. They do have 4 valves to make up for size.
Yes if you only drive to a few shows you will probably never have an issue but built engines just do not have a long life.

Guess with 11,000 on mine now I should plan a rebuild immediately then.................

I myself have never seen an engine with what I would consider a radical cam and heavy valve springs, double or triple, and flat tappets go more than 2,000 miles on race track without a refresh. That being new cam, lifters, springs, push rods, bearings and rings. Everything else is inspected and crank polished most times. All the used stuff was sold to the guys just trying to get into racing.
I am by no means an expert but did work in a race shop for couple years so saw lots of engines go through. The boss was the man with the knowledge I was there to learn.
Drag racing is passes not that many miles. Some of the Chevy guys at Greer 1/8 mile in SS that wind the crazy rpm in 12 to 13,000 can only go a couple weeks without rebuild. 
Roller cams definitely have an advantage of less friction and generates a better profile without all the wear forces. That is why Ford used rollers the 302 starting in the 80's. I have a friend that drove his Ford PU 165,000 miles without an oil change. He would change filter occasionally and just add. I would never do that but he did and it worked. How well it works to be determined, lol.
I have taken engines apart with hydraulic lifters that the cam and lifters was eaten up but engine ran smooth just no power.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
  Reply
(11-05-2018, 06:00 AM)NOT A T5 Wrote:
(11-05-2018, 01:05 AM)libram Wrote: alright so idle arm replaced, steering is back again, speedo gear replaced for a 21 tooth and the flowmaster 50 series are out and dynomax turbo mufflers are in. Sound is much more bassy and the unbearable high pitches are gone and the db is way down for where it was.

libram, it would be nice if you could post another video of how your car sounds now, for comparison. 
Really like how the 50s sound.

I plan to, but its been rainy and crappy, need to take pics but I'd rather do it when its nice, I'll post a video too.
  Reply
Put my new quick fuel carb on and tuned it. Raining so I could not take it out and test so I am sure there will be some additional adjustments. Cam is pretty crazy so my idle is around 1050 rpm and is a full roller. Still sounds mean even at that.
[Image: 9-AA1-B8-CA-D688-41-B3-B16-F-B3-DE9-D6-A801-C.jpg]

Will post a video tomorrow.

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
  Reply
moved to another thread.
  Reply
So, a couple of things in the past few weekends.  I've had tons of stuff going on, but managed to make it to a few car shows.

2 weekends ago, the Elks Lodge had a car show supporting the local VFW and other veteran charities.  Went there, won a 'Top 40' trophy (no pics, unfortunately - my camera battery died, and I was too stupid to take a pic with the cell phone).

Last weekend, there was a Toys 4 Tots Car Show at Twin Peaks restaurant, where the Mustang pulled another 'Top 40' award, this time a plaque.  I'd forgotten to charge the camera battery again, but took a quick cell phone pic, and a pal from the Concho Valley Car Council managed to get pics of all the entries... so, I swiped a few from him.

   

   

The editor of one of the local online news feeds (Joe Hyde, San Angelo LIVE!) was walking around taking pics, and I wound up sticking around for a few minutes talking with him after everybody had taken off.  He's a really cool guy and we were just BSing, but little did I know he was putting together a bit of a story.

Next thing I know, one of my FB friends linked me to the story.  Check it out: https://sanangelolive.com/news/entertain...dBspAZAcuQ

Here are a few of the pics Joe took, as well:

[Image: overview-of-event.jpg]

[Image: 69-71-mustang.jpg]

[Image: 71-mustang-01.jpg]

I'm still kicking myself for not insisting on placing the TuTone template on the hood myself, but oh well - I'll get it right next time it needs a paint job. Wink

Eric

[Image: mach1sig2.gif]
  Reply
Looks like you and stanglover have the same painter! Lol just kidding it’s still looking good Eric!
I had the wrong pattern too, was back to far from front edge, but I will insist that I see where they put the pattern b4 paint.

run_horse Run Horse Run!
John 72 Q Code
  Reply
Yup - pathetic, I know.  After all my goings on about how it should look, then I mess it all up by trusting the painter to figure out the simple instructions on the template.

smh

whistling

Eric

[Image: mach1sig2.gif]
  Reply
i coundn't use the plastic scoop screens ..so I may modify them at a later  date and fit them in

THE WIND SHEILD COWBOY
  Reply
(12-07-2018, 11:02 AM)batwrangler Wrote: i coundn't use the plastic scoop screens ..so I may modify them at a later  date and fit them in

I've always thought it would be cool to clean out the 'holes' between the honeycomb pattern on the plastic block-off plates and install them along with the Ram Air air scoops.  I'm pretty sure they won't fit without serious modification, though.  Shootself

Eric

[Image: mach1sig2.gif]
  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  Anyone know this car Mjordan 0 176 11-25-2018, 11:18 PM
Last Post: Mjordan
  Members car wrecked? Stocktrader 6 447 11-03-2018, 12:36 AM
Last Post: mach71351c
Cone Need advice on moving the car coop's mustang projects 7 308 10-10-2018, 08:35 AM
Last Post: bkdunha
  Meet the donor car mach1000 20 2,987 10-07-2018, 10:36 PM
Last Post: FordRamAir.com
  Anybody Recognize this Car? Don C 3 536 09-29-2018, 11:27 AM
Last Post: Don C
  trying to buy car in Tennessee buyer thinks i am scammer Nige 13 797 09-13-2018, 11:34 AM
Last Post: Nige
  71-73 Car Covers rocketfoot 11 762 08-23-2018, 05:19 AM
Last Post: rocketfoot
  Mustang Memories Car Show Stanglover 9 644 08-20-2018, 07:00 AM
Last Post: Stanglover



Users browsing this thread: 1 Guest(s)