T&D saga
#1173317
02/06/12 02:57 PM
02/06/12 02:57 PM
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Joined: Jan 2003
Posts: 1,611 westerly, ri. usa
440lebaron
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so...after all the rocker posts, my heads are off for fresh/up. stage VI max/wedge, comp .663lift/312dur. cam, springs 220@1.90 580@1.25 640@1.20, valve clearance .137, 1.5 ratio. shift 6800/7000 rpm, never backed off for winter. what do i look for other then coil bind,pushrod lenght etc, would like rockers to last more then 75/100 runs gary
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
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Re: T&D saga
[Re: Biginchmopar]
#1173319
02/06/12 03:24 PM
02/06/12 03:24 PM
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Joined: Jan 2003
Posts: 1,611 westerly, ri. usa
440lebaron
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single shaft system, i'ved had to "look back" six or seven times in the last five years
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
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Re: T&D saga
[Re: jamesc]
#1173321
02/06/12 04:10 PM
02/06/12 04:10 PM
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Joined: Jan 2003
Posts: 4,091 Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
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Shelby Twp. Mi
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Quote:
if you're tearing up rockers with that cam and amount of runs something is flat out wrong.
Respectfully X2!!!
IMO, among other problems, your seat loads are low. Where are the rockers breaking? Any pics? Are ALL your numbers theoretical from the manufacturer or actual measurements? 3/8" .080" moly pushrods? Measure EVERYTHING... Test your spring compressors accuracy. (height and load) Map your valve lift at the retainer as assembled. What is the entire cam profile? .05"/.200"/ lobe lift What is your retainer to seal clearence? What is your scrub pattern? Pushrod length correct? I have seen adjusters oiling gummed-up with locktite. There is a start. One more thing...
Quote:
if you're tearing up rockers with that cam and amount of runs something is flat out wrong.
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Re: T&D saga
[Re: HardcoreB]
#1173322
02/06/12 04:44 PM
02/06/12 04:44 PM
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Joined: Jan 2003
Posts: 1,611 westerly, ri. usa
440lebaron
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3/8 .120 pushrod, real spring pressure, comp springs #943 per cam list at 240@1.90 598@1.25 "new" rocker breaks horozontal bottom side facing spring, spring dia. 1.55 plenty of clearance. plenty of oil. adjusters are out 1 turn per T&D. scrub pattern?
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
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Re: T&D saga
[Re: HardcoreB]
#1173323
02/06/12 05:37 PM
02/06/12 05:37 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
I Live Here
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I Live Here
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Posts: 19,382
Las Vegas
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Any pictures of the broken parts? I agree that something has to be seriously wrong with that set up. I have run a ton more spring pressure than that on the common shafts with no issues many times in the past. I have never broken one of thier rockers. I bought a set of heads from someone(whole other story)that had T&D common shaft rockers that obviouosly were never cared for and chucked some pushrods and they still were not broken. A number of them had bad bearings afterward and were very beat up but they were still in one piece.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: T&D saga
[Re: JD Dart]
#1173331
02/07/12 03:27 AM
02/07/12 03:27 AM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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I Live Here
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Posts: 19,382
Las Vegas
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The newer T&D rockers do not have any clearance issues. The older(blue)ones did. They have solved that issue. Just FYI..
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: T&D saga
[Re: 440lebaron]
#1173333
02/07/12 10:37 PM
02/07/12 10:37 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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I Live Here
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Posts: 14,514
So. Burlington, Vt.
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how many runs on the springs to get them to lose 20lbs seat pressure?
new, those springs are closer to 250-260lbs @ 1.900.
for now i'll only add that sometimes certain spring and cam profiles just arent happy with each other. my guess is, your valvetrain is going into spring surge and thats whats causing the breakage.
i would up the pressures, and switch to a different spring.....maybe something with a damper.
do you have the cam lobe numbers??
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: T&D saga
[Re: steeldust]
#1173336
02/16/12 02:28 PM
02/16/12 02:28 PM
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Joined: Jan 2003
Posts: 1,611 westerly, ri. usa
440lebaron
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Joined: Jan 2003
Posts: 1,611
westerly, ri. usa
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ahha, some installed hights are off. some as high as 1.977. that puts springs at 180lbs closed. way to low seat pressure. now i feel better somewhat. 2.037 without spring locator. 2" spring with .030 shim should be just right gary seeya
all parts are sold as is, all parts are considered used no warranties or returns paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred site is not monitored 24/7 there might be a delay in response
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