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Old 04-30-2021, 06:04 PM   #76
dl242gt
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The 405 head I am using was built with the stock large springs. I use a enem V15 with them and as Culberro mentions they rev to 7k making power all the way. I love it.
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1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration.

1993 245 Classic, 430k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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Old 04-30-2021, 11:38 PM   #77
OldCarNewTricks
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Does anyone know of a "Dummy's guide on shimming valve springs?" I think that it is the cheapest and best choice for my car. It goes in between the seat and spring, but is outer or inner diameter overly critical, or not so much? I'll likely just bring the stock springs back to 45.5mm (.030" shims), as I don't truly anticipate spinning the engine higher than 5k at any time. Even 5k is a bit high for my slush box AW70...
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Old 05-01-2021, 02:30 PM   #78
culberro
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Quote:
Originally Posted by OldCarNewTricks View Post
Does anyone know of a "Dummy's guide on shimming valve springs?" I think that it is the cheapest and best choice for my car. It goes in between the seat and spring, but is outer or inner diameter overly critical, or not so much? I'll likely just bring the stock springs back to 45.5mm (.030" shims), as I don't truly anticipate spinning the engine higher than 5k at any time. Even 5k is a bit high for my slush box AW70...
What camshaft are you using?
Iím going to say that you can just drop them in there as is and itíll be just fine.
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Old 05-01-2021, 02:58 PM   #79
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What camshaft are you using?
Iím going to say that you can just drop them in there as is and itíll be just fine.
Going from "M" to "A." If that's the case, then I'll do that! I'll definitely do some cleaning on the valve train and the accessible part of the head, as its grimy after many miles.
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