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202 EFI cylinder head V's normal head?
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witcheshollow racing team Offline
#1 Posted : Tuesday, 13 November 2007 6:28:56 PM(UTC)
witcheshollow racing team

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Gday all, In the Gregorys work shop manual in the supliment section on the EFI for VK's it states:

"The cylinder head and inlet valves have been re-designed to inprove gas flow"

So two questions:

1. What are the changes that where made in relation to a standard head?

2. Can the EFI run on a standard head or do you need to use the EFI head or modify a standard head to EFI specs?

Secondly it also states:

"The camshaft, pistons, timing gears, exaust system and cylinder head gasket have been re-desighned to suite the improved performance of the engine"

So the question here is: Do any of these need to be changed on a standard motor before the EFI unit is fitted?


I have read the articals posted on this sight in relation to doing the swap but have not read anything in relation to the type of engine used. Was it the EFI engine, stock with moderfied head or just stock?

Thanks for your time on this one.

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vintageholden Offline
#2 Posted : Tuesday, 13 November 2007 7:23:53 PM(UTC)
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i can answer question 2 ..EFI heads are 12 port...
from what i know pistons are the same but con rods are stronger
cam is larger...are you fitting efi on red motor....if so just fit blue or black head 12 port....
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peterwmh Offline
#3 Posted : Tuesday, 13 November 2007 7:28:21 PM(UTC)
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I think he's asking if a carbed VK head is the same as EFI VK head from what I read in the original post?? If so I think they are almost identical except the carbed head has ports for the air injection. They are both 12 port.

Hope this helps.

Pete
202 and three on the tree, can't get more Aussie than that!!
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peterwmh Offline
#4 Posted : Tuesday, 13 November 2007 7:28:21 PM(UTC)
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I think hes asking if a carbed VK head is the same as EFI VK head from what I read in the original post?? If so I think they are almost identical except the carbed head has ports for the air injection. They are both 12 port.

Hope this helps.

Peter
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HK1837 Offline
#5 Posted : Tuesday, 13 November 2007 10:12:36 PM(UTC)
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EFI cam is bigegr. Close to 30/70 70/30 if you "un-retard" it ie use a 0deg timing set. Only other difference apart from fuel, spark and air pump stuff is the engine number prefix VL for carby, VK for EFI.

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witcheshollow racing team Offline
#6 Posted : Tuesday, 13 November 2007 10:27:03 PM(UTC)
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Sorry should have mentioned looking at putting it on a WB Panelvan fitted with Blue 202.

I am asuming the valave differance would be in the cut on the valve face and I am asuming the differance in the head is the lack of air injectior holes. This is wh
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HK1837 Offline
#7 Posted : Wednesday, 14 November 2007 4:32:45 AM(UTC)
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Cam is significtly different, and has a delated inlet closing to take advantage of the ram tube effect. Send me an email and i'll send you the lobe profile.

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HK1837 Offline
#8 Posted : Wednesday, 14 November 2007 4:32:45 AM(UTC)
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Cam is significtly different, and has a delated inlet closing to take advantage of the ram tube effect. Send me an email and ill send you the lobe profile.

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Dr Terry Offline
#9 Posted : Wednesday, 14 November 2007 7:56:57 AM(UTC)
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Hi Guys.

peterwmh is correct. The original question was "is a VK carby head the same as a VK EFI head ? "

The answer is yes, if you don't count the threaded holes for the exhaust air injectors, they are the same casting. These 2 'Black' heads flow b
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Dr Terry Offline
#10 Posted : Wednesday, 14 November 2007 7:56:57 AM(UTC)
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Hi Guys.

peterwmh is correct. The original question was "is a VK carby head the same as a VK EFI head ? "

The answer is yes, if you dont count the threaded holes for the exhaust air injectors, they are the same casting. These 2 Black heads flow bett
If at first you don't succeed, just call it Version 1.0
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Mr Void Offline
#11 Posted : Wednesday, 14 November 2007 11:08:50 PM(UTC)
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The valve shape and cylinder head shape in the efi heads is ever so slightly diferent (answering q. #1), this was to improve gas flow.

If you are looking at doing the conversion I would strongly recommend you jump onto ebay and buy a GMH Service manual
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witcheshollow racing team Offline
#12 Posted : Thursday, 15 November 2007 5:37:07 AM(UTC)
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Ok so we have established use the black EFI head, change the cam (a must do) and get a GMH service manual, appart from that all else shoulds be ok.

So any comments on the ported Blue head? use or not use with the EFI set up?

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