delcowizzid
on holiday
didnt greenfoam post pics of his cracked stock retainers split the collet hole
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[308] valve spring issues.
- Thread starter ari666
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ari666
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what i calculate (assuming all the lobes are as new and lifters are lifting to full height)
1.110 coil bind
1.760 install height (meant to be 1.8 according to cranes website, but on the spec sheet that came in the box it says 1.750)
0.511 lift
1.249"@ toe
leaves .139 from bind. which is 3.5mm should be plenty. arent you supposed to have a min of 0.020?
and the seat pressure of these springs is HEAPS more than the old ones.
1.110 coil bind
1.760 install height (meant to be 1.8 according to cranes website, but on the spec sheet that came in the box it says 1.750)
0.511 lift
1.249"@ toe
leaves .139 from bind. which is 3.5mm should be plenty. arent you supposed to have a min of 0.020?
and the seat pressure of these springs is HEAPS more than the old ones.
DANNY8
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Here's some pics from of a cracked retainer on our old 253. Not sure wat springs they were but they were doubles, on yella terra heads. We'd put the heads on a diff motor with a bigger cam. Wasn't coil binding, but maybe something to do with more lift. We changed them for LT1 springs and put crow heavy duty retainers and collets on....still got the old springs, was just to scared to use them incase the same thing happened again haha. Heads are still goin strong with the LT1's and crow retainers and collets...altho got a smaller cam in it now tho.
ari666
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oh crap! that looks pretty cracked! :s ok maybe i should invest. damn, that means i gotta take all those damn retainers off again 
um yeah 511 lift is AFTER you times the extra lift from the rollers. so .496 lift with 1.6's, .511 with 1.65 YT's, 310 lift at the lobe (its actually 510.5 after *1.65)
i forgot the add the 0.030 for the spring cups (the things under the retainer) mic'ed up 3 and they all measure 0.030 pretty much on the nose, so i am looking more at 0.109, which is getting close, but still should be ok.
um yeah 511 lift is AFTER you times the extra lift from the rollers. so .496 lift with 1.6's, .511 with 1.65 YT's, 310 lift at the lobe (its actually 510.5 after *1.65)
i forgot the add the 0.030 for the spring cups (the things under the retainer) mic'ed up 3 and they all measure 0.030 pretty much on the nose, so i am looking more at 0.109, which is getting close, but still should be ok.
DANNY8
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I'm pretty sure our Crow retainers cost about $100 for a set, and Crow collets were about $12. Ended up buying a few packets coz they were on clearance.
The Crane retainers on me new donk cost about $120. So yeah for the price ya may as well spend a few bucks to know they ain't gonna break.....but that's where it starts and it can get out of hand pretty quick.....which is exactly wat's happened with me new motor lol.
The Crane retainers on me new donk cost about $120. So yeah for the price ya may as well spend a few bucks to know they ain't gonna break.....but that's where it starts and it can get out of hand pretty quick.....which is exactly wat's happened with me new motor lol.