Re: T&D roller rocker, how long will they last ?
[Re: brads70]
#1704255
11/28/14 04:37 PM
11/28/14 04:37 PM
|
Joined: Aug 2003
Posts: 43,230 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,230
Bend,OR USA
|
Quote:
I have T&D roller rockers custom built on my 451" Mopar stage 6 heads. Just wondering how long they will last on a street motor? Anyone have experience with them durability wise? Thanks Brad
It depends on how many RPM and what lift the valves have and type of lifter, flat tappet shifted at or below 7000 RPM should last a long time. I'm sure your crusing RPM will make a difference also, if ran at 4500 RPM for 10,000 miles will be a lot more cycles than the same milegae driven at 2700 RPM I put a set of harland Sharps on my old pump gas street Duster motor, I raced it more than I drove it on the street, I shifted it at 7000 RPM in each gear. I reshimmed the valve springs once and replace those springs after several years and never had a issue after replacing the adjusters with those rockers, they where the 1.6 ratio also . My motor had 250 lbs on the seats and 630 lbs opened on the solid roller cam. I stiffen the pressures up an the second set of valve springs(different brand) to 275 lbs on the seats and 680 lbs opened. Let us know the answers so we can hep you better with more information. I bought a set of the T&D for my bracket motor, I wasn't really impressed with them compared to the Harland sharps, they both had lift differences at the valves on the same cam About .030 differences checking with light springs between the most lif and least lift on the same lobes, probally worst with the good race valve springs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: T&D roller rocker, how long will they last ?
[Re: brads70]
#1704257
11/28/14 05:30 PM
11/28/14 05:30 PM
|
Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
I have T&D roller rockers custom built on my 451" Mopar stage 6 heads. Just wondering how long they will last on a street motor? Anyone have experience with them durability wise? Thanks Brad
I have them on all of my engines.. on the race stuff I have at least 4 years on them turning 8200 rpm with 320# on seat and over 800 open.. I have them on my street rod but I only have about 500 miles on it so far.. thats with 260# on seat and 600# open(all solid roller cams).. if you have to change the valve lash you have problem parts... after the first recheck I havent had to change lash at all(no more than .001 variance)
|
|
|
Re: T&D roller rocker, how long will they last ?
[Re: Al_Alguire]
#1704269
11/30/14 09:54 PM
11/30/14 09:54 PM
|
Joined: Mar 2012
Posts: 220
Jerry Kathe
enthusiast
|
enthusiast
Joined: Mar 2012
Posts: 220
|
Sincerely sorry to see that, absolutely sucks……but wasn’t the following two quotes made by you in a “Charlies Oil Pan” thread earlier this year?
QUOTE “IMO it is a good pan for the money. We have used them in the past and they are WAY better than the Milodon stuff.”
QUOTE “Chris I ran that pan for years and NEVER ha d a leak. Also in reply to the no HP gain with the kickout I will call BS as well. We ran mine on the dyno when I first bought one. We made 23 more HP with the side kickout than we did with the milodon dragster style pan. So my experience is quit e a bit different than posted here. We have since moved on to a different pan builder. But I still feel this is one area many Mopar guys are missing the boat.”
I’m guessing by the silicone art, this was the bullet that came with your pipe rack, and not one of your pieces? Hopefully the frame wasn't damaged – one huge reason I wont run steel rods in mine – losing the engine would be bad enough, having to also back half the car would be catastrophic.
To the OP on the original topic - IMO, you cant really assign a timeline to these types of components, too many variables. Just keep up on the valve springs and perform good inspections, check for resistance with turning the adjuster screw and for any noticeable roughness in the bearing, in addition to discoloration of the main body (stress evidence).
FWIW, my pipe rack has a 17 year old 572 w/-13 heads, 1.7 ratio, 340 on the seat and 1100 on the nose, many laps on these T&D's and no failures. They very well may have been some of the first T&Ds that were ever produced for those heads. I think you will be happy.
|
|
|
Re: T&D roller rocker, how long will they last ?
[Re: Jerry Kathe]
#1704270
11/30/14 10:46 PM
11/30/14 10:46 PM
|
Joined: Jan 2003
Posts: 19,376 Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,376
Las Vegas
|
FWIW the bearings look new, almost to new honestly. Yes this motor came with the car. We had numerous issues with the the car from day one. Looking back we should have pulled it apart but figured it would last two races. Looked at log book today and it made 21 runs from the day we got it. Plan was to pull it apart after this race and freshen it up. Now it is total loss. The damage did take out one body panel. Luckily it missed the frame rails. It will NOT have steel rods in it again IF we keep it. For now we need a complete motor and the kid is on a tight budget as this was to be his car. Oh yeah don't have to worry about using that pan as it was destroyed along with everything else
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
|
|