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 hrastovica
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 posted on May 7th, 2014 at 11:58 PM |
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1641cc or 1776cc
Ok so i have just booked the bug in to get a new heart and agreed to getting the dual port reconditioned to 1641cc with a reputable local engine
builder. In the meantime i have spoken to a friend (also a VW nut) who is suggesting to go the 1776cc, as the price of parts should be about the same
and just a little extra boring for the larger barrels and pistons... without any loss in reliability or longevity.
Would love to hear your opinions on this...
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 matberry
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| posted on May 8th, 2014 at 08:47 AM |
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Machining costs AND compression ratio rectification are the only extra costs. Machining costs are $300-400, CR is to be advised by your engine
builder, the easy (cheap) way is measure up and fit barrel spacers, sometimes this requires longer pushrods.
Something you may consider is a new 74 - 78mm stroker crank and keep the std or 87mm bore. No machining required, a crank is about the same cost as
the machining and everything else is the same. 74x87 will give you a 1760cc engine that IMO will have plenty more torque with the extra stroke than
the 69x90.5 1776cc engine. 76x87 = 1807cc Sounds good hey.... 
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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empi
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| posted on May 8th, 2014 at 11:14 AM |
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I have new in box 90.5 pistons and barrels Dom!!
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Bizarre
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| posted on May 8th, 2014 at 01:11 PM |
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Are you planning on changing carbs or sticking with a 34 pict?
What about the cam?
Futue te ipsum!!!
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hrastovica
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| posted on May 9th, 2014 at 12:59 AM |
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Ok so the final verdict is in, i have decided to go down the path of 1776. Cam will be EngleW110 as per the engine builders recommendation, and a
stock carb initially (I know its below spec but will have to do for a couple weeks/months til i sort out my $$$ to get some twin carbs on there).
Any suggestions on carbs for 1776? (Preferrably twin barrel twin carbs)...
Weber IDF36 or IDF40? Overkill?? Not?? Dellortos?
Open to suggestions here...
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hrastovica
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| posted on May 9th, 2014 at 01:00 AM |
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| Quote: | Originally
posted by empi
I have new in box 90.5 pistons and barrels Dom!!
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Unfortunately too late as the car is already booked in and i think John has already organised all the parts...
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matberry
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| posted on May 9th, 2014 at 08:33 AM |
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Weber or Dell 40's will be fine for that combo IMO
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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psimitar
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| posted on May 12th, 2014 at 05:45 AM |
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| Quote: | Originally
posted by matberry
Machining costs AND compression ratio rectification are the only extra costs. Machining costs are $300-400, CR is to be advised by your engine
builder, the easy (cheap) way is measure up and fit barrel spacers, sometimes this requires longer pushrods.
Something you may consider is a new 74 - 78mm stroker crank and keep the std or 87mm bore. No machining required, a crank is about the same cost as
the machining and everything else is the same. 74x87 will give you a 1760cc engine that IMO will have plenty more torque with the extra stroke than
the 69x90.5 1776cc engine. 76x87 = 1807cc Sounds good hey....
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I thought case clearancing was necessary for anything over 69mm stroke?
OP - I'd go a 1776 or better still Matts option. Makes for a much more driveable engine than the 1641.
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modnrod
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| posted on May 12th, 2014 at 05:53 AM |
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Stock carb isn't below spec, I've run high-15s on a Solex34. Just so you aren't too surprised though when it's running first up without dual 40s,
a stocker carb with a 110 will idle with a "slight lump".........
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