GTV6 cams in 3 litre 75QV

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Bruce
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GTV6 cams in 3 litre 75QV

Post by Bruce » Mon Feb 18, 2013 5:38 am

.. has anyone tried these cams in said engine?
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Giuliettaevo2
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Re: GTV6 cams in 3 litre 75QV

Post by Giuliettaevo2 » Mon Feb 18, 2013 9:34 am

Should fit but is a serious step back... :?
Drive it like you stole it...
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Re: GTV6 cams in 3 litre 75QV

Post by Bruce » Mon Feb 18, 2013 12:14 pm

... how do they compare to standard 3 litre cams?
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GTV27
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Re: GTV6 cams in 3 litre 75QV

Post by GTV27 » Mon Feb 18, 2013 6:32 pm

The specs that I have on file:

GTV6 Standard
intake 222@0.05, 9.1mm lift
exhaust 205@0.05, 8.9mm lift

3.0 Jetronic
intake 226@0.05, 9.7mm lift
exhaust 206@0.05, 9.2mm lift

3.0 Motronic
intake 230@0.05, 9.2mm lift
exhaust 214@0.05, 9.2mm lift

Motronic is the best option here. SZ cams may be different/better, but I don't have specs on them handy.

For the record, mine has the following, which are very similar to the fabled 10548s used to great effect in the 2.0 Nord:

Intake 234@0.05, 10.3mm
Exhaust 224@0.05, 10mm

This may not pass smog wherever you are, but makes for a fabulously torquey engine that will sing to whatever rpm you care to set your rev limiter to (mine is 6.5 as I am pretty conservative and that's fast enough).
Jason
1983 GTV6 2.8 litre
Jim K
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Re: GTV6 cams in 3 litre 75QV

Post by Jim K » Mon Feb 18, 2013 8:31 pm

This subject has been disputed several times, here and on the BB. 3liter Motronic cams are identical to SZ cams; they have the same part numbers, 60548163 and 60548164. These cams are used in the late 164, 75 and SZ/RZ.
Jim K.
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Re: GTV6 cams in 3 litre 75QV

Post by GTV27 » Mon Feb 18, 2013 9:54 pm

thanks Jim - I shall update my records!
Jason
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Re: GTV6 cams in 3 litre 75QV

Post by shiny_car » Tue Feb 19, 2013 1:48 am

GTV27 wrote:3.0 Motronic
intake 230@0.05, 9.2mm lift
exhaust 214@0.05, 9.2mm lift
I believe it is 10.1/10.1.

:)
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Re: GTV6 cams in 3 litre 75QV

Post by Jim K » Tue Feb 19, 2013 6:03 am

Motronic cams:
IN: 230*@0.05", 10.4mm CAM lift.
EX: 226* @0.05", 6.54mm CAM lift (9.16mm at valve with no clearance)
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Re: GTV6 cams in 3 litre 75QV

Post by shiny_car » Tue Feb 19, 2013 1:55 pm

It is true that I can't read specs when half asleep! :P 10.1/6.4 according to this:

http://www.international-auto.com/file_ ... /index.cfm

Jim, perhaps your specs are actual 'measured' specs you've done? The above may be factory specs. :?:

Either way, I'll go with yours - I won't even pretend to know what I'm talking about in comparison!

:)
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