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jecstl Samba Member
Joined: April 21, 2009 Posts: 348 Location: cadet , mo
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Posted: Sun Jan 25, 2015 11:31 am Post subject: Which piston for 1.7L |
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rebuilding my 1.7 top end frit its installed in a bay so hp or torque are important
have two choices
1 use new flat tops domed are not available
2. put rings on my old domed pistons
ideas ? _________________ vw trike
78 super beetle
75 van |
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raygreenwood Samba Member
Joined: November 24, 2008 Posts: 21475 Location: Oklahoma City
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Posted: Sun Jan 25, 2015 2:49 pm Post subject: |
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So.....this is a 1.7l from a 411, 412 or 914....right? Great combo but just remember your tuning needs to be excellent with a high compression engkne like that going into a bus.
Typically flat top 1.7 pistons for type 4 are harder to find.
The domed 1.7 pistons are available from AA. You can buy either pistons only or a piston cylinder set.
If the ones you have have 100k miles on them in a type 4 car or 914.....measure them for skirt collapse and you "could" reuse them.....but noting how busses abuse type 4 engines.....I think reusing them would be false economy. Save them for a spare set and get new ones from AA.
If this engine has already run any length of time in a bus....dont reuse the pistons. Ray |
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jecstl Samba Member
Joined: April 21, 2009 Posts: 348 Location: cadet , mo
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Posted: Sun Jan 25, 2015 4:42 pm Post subject: pistons |
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thanks ray have ordered aa but just reverse they have flats and not domed
ordered full set of flats and rings in case I decide to stay with domed
again my question which would work better _________________ vw trike
78 super beetle
75 van |
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raygreenwood Samba Member
Joined: November 24, 2008 Posts: 21475 Location: Oklahoma City
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Posted: Sun Jan 25, 2015 6:03 pm Post subject: Re: pistons |
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jecstl wrote: |
thanks ray have ordered aa but just reverse they have flats and not domed
ordered full set of flats and rings in case I decide to stay with domed
again my question which would work better |
Are they out of stock? They had domes last year.
From their site:
Porsche 914 dome top pistons 90mm x 66mm pistons only part# VW 9000T4EP $165.95
And Porsche 914 dome top piston and liner set 90mm x 66mm part # VW 9000T4E $295.93.
Are you sure you have checked carefully or called? Ray |
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jecstl Samba Member
Joined: April 21, 2009 Posts: 348 Location: cadet , mo
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Posted: Mon Jan 26, 2015 5:39 am Post subject: aa |
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discontinued as a set did not try non sets
***** DISCONTINUED *****
were kinda getting off subject not worried about what to buy rather which to use _________________ vw trike
78 super beetle
75 van |
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raygreenwood Samba Member
Joined: November 24, 2008 Posts: 21475 Location: Oklahoma City
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Posted: Mon Jan 26, 2015 9:42 am Post subject: |
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dang....that sucks! I was actually glad that they made them and that quality had really improved. I was planning to use some for future builds.
Use the flat tops. I am assuming you have a carbed motor? When properly assembled what you will have is exactly what came in the early 411 car with, carbs which was 7.8:1 compression and about 68hp. Dont use the stock cam. Get a web 73 or possibly even a web 86....since you dont have to stick with stock injection timing. Either will be an improvement. Ray |
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