GTAm Cam Cover

[Shire_GTV]

I've had this thought for a while now so it is time to share.

I know there are many 105's etc running around with twinspark conversions but to my eyes they just don't look right. Would it be possible for someone to cast/manufacture a cam cover identical to the GTAm cover that with fit on a twinspark? It would suddenly make all of those GTAm replicas even closer to being correct. I know if I get around to doing a GTAm replica someday, i would want a twin spark with a period correct looking cover.

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Cheers

[GTV6SA]

The GTAm cam cover will not fit a twinspark engine asthe area where the cams sit has scallops in it and the GTAm camcover wer cast from magnesium alloy

[Shire_GTV]

I guess you missed the point.

Would it be difficult to cast up a cover that looks "as close as possible" to the GTAm one but still fits the twin spark motor correctly.

[davbert]

adam

i was thinking of the same thing... Im not sure if you can make them identical because the bolt locations are vastly different. but if one can eliminate the ribs and use the old oil filler cap, it can be a little more sympathetic for the gtam vintage look.

i did notice a few different locations for the oil fillers for the gtams, how many variants (not including the 16Vs) are there?

cheers

db

[Zagato_Olaf]

Quote:

Originally Posted by davbert adam i was thinking of the same thing... Im not sure if you can make them identical because the bolt locations are vastly different. but if one can eliminate the ribs and use the old oil filler cap, it can be a little more sympathetic for the gtam vintage look. i did notice a few different locations for the oil fillers for the gtams, how many variants (not including the 16Vs) are there? cheers db

[Zagato_Olaf]

Hello davbert,

Here is another one. Looks a lot like the green one. The pictures with courtesy of alfabb members and the internet. In all the years on the internet, I didn't always manage to document the source of the pictures.

Ciao, Olaf

[Zagato_Olaf]

Hello davbert,

Found another one. This picture was shot by myself.

Ciao, Olaf

[Shire_GTV]

Just a picture of a twin spark cover to use as reference.

[davbert]

olaf

here's a few couple that ive taken off the net with different locations. i think they are most common 3/4 down the exhaust side like the pics you have posted. so the others must be anomalies?

although most of them where built off of USA spec 105's, there arent a lot of gtam in america. anyone out there know of any gtams in the states?

I have only seen one in the flesh here in the bay area back in 92. below are pics I took of #1382607 then at an alfa specialist garage. i have read somewhere that this car is no longer in the country.

[South Africa]

Find attached photographs of GTAm type tappet covers I have. I have also seen many modified tappet covers where the original oil filler hole is welded up and a new one attached elsewhere. In our environment, in England, it would be extremely expensive to cast and machine 'a one off' magnesium tappet cover for such an engine as the twin spark or GTAm type engine. I am made to believe in excess of £2000. I believe their may be other solutions one could follow - maybe manufacture from sheet etc. A lot of work and expense either way I believe.

The first is for GTAm type motors for ALFETTA type cars.

The second is for GTAm type motors in a 105 type GTV shell.

Hope the above is of some assistance.

[Zagato_Olaf]

Quote:

Originally Posted by davbert olaf here's a few couple that ive taken off the net with different locations. i think they are most common 3/4 down the exhaust side like the pics you have posted. so the others must be anomalies? although most of them where built off of USA spec 105's, there arent a lot of gtam in america. anyone out there know of any gtams in the states? I have only seen one in the flesh here in the bay area back in 92. I took these pics of #1382607 then at an alfa specialist garage. i read somewhere that this car is no longer in the country.

[Zagato_Olaf]

Hello South Africa,

Thanks for the pictures of the Alfetta (116) GTAm and Giulia (105) GTAm valve covers! The obvious difference to me is the location of the oilfillercap. Interesting to see the different locations of the oilfillercap in the pictures of davbert. Do you know if there are more differences between an Alfetta and a Giulia type cover?

Ciao, Olaf

[davbert]

theres a great multipage article on #1382607 featured in Sportscar International a few years ago. and i think it was from south america somewhere. when i saw the car it was in prestine condition making me think it was recently restored.


i'll see if i can find it on my pc and get the date of the issue if anyone is interested.

so a wish list would be a replica gtam valve cover for a twinspark along with the rare cheater 8x14 gta wheels....

south africa.....thanx for posting those fantastic pics. i wish i knew a little more of the sand casting mold making techiques. i think building the prototype out of alloy would be no problem with a 5 axis. maybe ill just make one for myself?....

cheers

db

[Shire_GTV]

I imagine a "magnesium - one off" would be expensive..... but.....

An aluminium one, same as the standard engine material might be more cost effective. Apart from access to a genuine cover, (which enough people here seem to have!) and the time to adjust a mould to be fit cleanly. I can't see it being terribly difficult or prohibative. (Non engineer's point of view of course.) Plenty of other marques have plenty of aftermarket cam covers / rocker covers available. Look at the hotrod scene. All kinds of crazy designs for a mulitude of engine makes, ranging from pressed steel (stainless etc....) through to billet aluminium. Even the humble MG T types have a range of after market cast aluminium covers available through the MOSS catalogue.

Still just a crazy trumpet players' thought.

[PSk]

Quote:

Originally Posted by Shire_GTV I imagine a "magnesium - one off" would be expensive..... but..... An aluminium one, same as the standard engine material might be more cost effective. Apart from access to a genuine cover, (which enough people here seem to have!) and the time to adjust a mould to be fit cleanly. I can't see it being terribly difficult or prohibative. (Non engineer's point of view of course.) Plenty of other marques have plenty of aftermarket cam covers / rocker covers available. Look at the hotrod scene. All kinds of crazy designs for a mulitude of engine makes, ranging from pressed steel (stainless etc....) through to billet aluminium. Even the humble MG T types have a range of after market cast aluminium covers available through the MOSS catalogue. Still just a crazy trumpet players' thought.