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Martin S.
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« Reply #30 on: April 12, 2020, 17:00:53 pm » |
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I don’t know about pushrods changing, but this noise is the pistons hitting the heads. I just thought it was interesting how the engine runs fine when it warms a little vs cold (like on your engine stand). Referencing the rally engine experience above.
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Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
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samotorsport
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« Reply #31 on: April 12, 2020, 17:44:52 pm » |
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Wow if i would have heard such a noise i would never haf the balls to let it heat up to find out if the noise goes away , i guess i would have stripped it straight away  |
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richie
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« Reply #32 on: April 12, 2020, 17:50:27 pm » |
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I don’t know about pushrods changing, but this noise is the pistons hitting the heads. I just thought it was interesting how the engine runs fine when it warms a little vs cold (like on your engine stand). Referencing the rally engine experience above.
He said on rally engine it doesn't hit so not sure what you mean there? , and i am with Sam, I wouldn't run it if it hit ever, just build it right. |
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Cars are supposed to be driven, not just talked about!!! Good parts might be expensive but good advice is priceless |
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Martin S.
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« Reply #33 on: April 12, 2020, 20:35:54 pm » |
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I’ll get around to fixing the noise but it can wait. That engine was built like that in 2013 and has thousands of miles on it being used every year as a daily. The bottom end wasn’t touched at the time of the tight deck heads. Bottom end was done with a Berg cw 69 crank back in 1998. Bearings are original from 1998 and seem fine even today with little racket thru the shifter and makes plenty of power still.
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« Last Edit: April 12, 2020, 20:58:21 pm by Martin S. »
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Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
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brewsy
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« Reply #34 on: April 13, 2020, 11:31:58 am » |
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Bearings are original from 1998 and seem fine even today with little racket thru the shifter and makes plenty of power still.
Martin is that one of those anti pre-ignition slots that you've put into the head? [ Attachment: You are not allowed to view attachments ] |
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Martin S.
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« Reply #35 on: April 13, 2020, 12:29:28 pm » |
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Yes, it adds turbulence along with the tight deck.
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Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
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richie
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« Reply #36 on: April 14, 2020, 09:51:43 am » |
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Just looked through all my bits and I don’t have any valves Richie.
If you have an old one that would be fantastic. Really appreciate the help
One gone in mail to you now, already cut down and ready to use  |
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Cars are supposed to be driven, not just talked about!!! Good parts might be expensive but good advice is priceless |
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Eddie DVK
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« Reply #37 on: April 14, 2020, 10:04:47 am » |
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I always tought the rule of thumb was 1.5 mm on the inlet and 2.0mm on the exhaust.??
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« Last Edit: April 14, 2020, 10:47:36 am by Eddie »
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Regards Edgar
" Type 4, it is a completely different engine. You have to drive one to understand! "
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jay c
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« Reply #38 on: April 14, 2020, 10:51:27 am » |
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Just looked through all my bits and I don’t have any valves Richie.
If you have an old one that would be fantastic. Really appreciate the help
One gone in mail to you now, already cut down and ready to use thanks Richie. Legend Going to do at least that , probably a fraction more. Thanks Ed |
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jay c
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« Reply #39 on: April 18, 2020, 13:18:32 pm » |
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Just looked through all my bits and I don’t have any valves Richie.
If you have an old one that would be fantastic. Really appreciate the help
One gone in mail to you now, already cut down and ready to use all received. Thank so much. And thanks for sharpening it too. I owe you a beer |
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leec
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« Reply #40 on: April 18, 2020, 13:22:40 pm » |
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I have found this thread really interesting. My new motor will need valve notches.
Please can you post some pics of what you do with the sharpened valve Richie sent you
Thanks,
Lee
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DaveN
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« Reply #41 on: April 19, 2020, 20:56:40 pm » |
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Please can you post some pics of what you do with the sharpened valve Richie sent you
It says on the first page what to do with it. It’s put in the valve guide to mark the center of the piston. You can then use this to mark where the notches will be on the piston. |
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leec
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« Reply #42 on: April 21, 2020, 10:30:22 am » |
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Thanks Dave, I do get that bit  It's how the angle of the guide in relation to the piston that translates to the relief cut that interests me. |
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« Last Edit: April 21, 2020, 15:04:10 pm by leec »
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