1G vs 2G Head ?

[Drift4G63]

Quick question, what all different between the heads in a 1G Turbo and non. Just the cams? So if I swapped those out would they heads be the same?

 

[chinchin]

correct

 

[ImportWarrior]

can i use a 1st gen non turbo head on the second gen and just use the stock 2nd gen cams and all?

i know there is more to it than that but as far as swapping. how about the 1st gen non turbo valves compared to a 2nd gen turbo valves?

thanks for your patience
IW,

 

[chinchin]

I coundn't say for sure about all the internals in the heads. But you can usually find 1st gen turbo cams on ebay for fairly cheap. If you want to know for sure about the valves i'd say the best way to find out is to go to one of these online mitsu parts dealers, look the the valves up for both cars and compare part #'s

 

[stangtt]

The non-turbo and turbo 1G heads are identical other then the cams. Including the valvetrain.

 

[chinchin]

What he's now asking is of the compatability between the first and 2nd generation componats.

 

[ImportWarrior]

thanks for the replies!
if all i have to do is swap cams from the 2nd gen to the 1st gen head i am in good shape.

thanks for your time

 

[stangtt]

Originally posted by chinchin
What he's now asking is of the compatability between the first and 2nd generation componats.

The cams and valvetrain is fully interchangable from 1G to 2G.

 

[Defiant]

Originally posted by stangtt
The cams and valvetrain is fully interchangable from 1G to 2G.

....nearly:

http://www.roadraceengineering.com/1g2gheadswaptechtip.htm

 

[stangtt]

Originally posted by Defiant
....nearly:

http://www.roadraceengineering.com/1g2gheadswaptechtip.htm

Were you refering to clearancing the 1g head for the screw heads that are on the back of the 2g intake cam gear?

 

[Crazy-MC]

Hey,
Does anyone know the difference between cam identification #'s. My problem is I have 85 to 80 psi between all four cylinders. Now this is my third engine rebuild and have gotten the same results every time. The only thing I haven't replaced is the head. Now the numbers on the intake cam are 01 and 9, and the exhaust are 28 and 9. On another cylinder head I have, the cam numbers are on the intake 27 and 9, and on the exhaust 08 and 9. From the looks of the numbers the cams are reversed, but that's imposible due to the mounting of the crank angle sensor. So needless to say from compression tests to a makeshift leak down test (removed compression gauge and ran air compressor to it), I have found no answer. The timing marks are lined up perfectly. I am getting a new cylinder head from aluminumcylinderhead.com for $400, and putting it on this weekend. The father and son combo I bought this car from gave me the full reach around job, and they weren't even gentle with the rubber glove!

 

[leet]

Originally posted by stangtt
Were you refering to clearancing the 1g head for the screw heads that are on the back of the 2g intake cam gear?

It's easiest to ditch the 95-96 cam sensor and go with a 97+ style. That's what I did when I performed my swap.

 

[jetdriven]

I believe that a letter is stamped in the tail end of the cam opposite the cam gear. A-B-C-D are your options. C is the correct cam letter for a 1991-1994 turbo MT car. D may also be true. Need a pair of "C" cams.

For 400$ you can get a head rebuilt by Bj's cylinder head of Tulsa OK. For this you get a radius valve job that flows higher than stock. BJ built Shepard's head, he ran 7's on that.

Originally posted by Crazy-MC
Hey,
Does anyone know the difference between cam identification #'s. My problem is I have 85 to 80 psi between all four cylinders. Now this is my third engine rebuild and have gotten the same results every time. The only thing I haven't replaced is the head. Now the numbers on the intake cam are 01 and 9, and the exhaust are 28 and 9. On another cylinder head I have, the cam numbers are on the intake 27 and 9, and on the exhaust 08 and 9. From the looks of the numbers the cams are reversed, but that's imposible due to the mounting of the crank angle sensor. So needless to say from compression tests to a makeshift leak down test (removed compression gauge and ran air compressor to it), I have found no answer. The timing marks are lined up perfectly. I am getting a new cylinder head from aluminumcylinderhead.com for $400, and putting it on this weekend. The father and son combo I bought this car from gave me the full reach around job, and they weren't even gentle with the rubber glove!

 

[90AWDTalon]

I believe that a letter is stamped in the tail end of the cam opposite the cam gear. A-B-C-D are your options. C is the correct cam letter for a 1991-1994 turbo MT car. D may also be true. Need a pair of "C" cams.

For 400$ you can get a head rebuilt by Bj's cylinder head of Tulsa OK. For this you get a radius valve job that flows higher than stock. BJ built Shepard's head, he ran 7's on that.

What is A from? When I had my car apart to do the head gasket I noticed I had A and C, I don't remeber which was intake and which was exhaust. This is a '90 MT, the guy who had the car previous to the guy I bought the car from said he swapped to the '91 exhaust cam when he put a new head on.

Also had any one come up with an optimum combonation of the stock cams?

Does any one know the differences between all these cams?

 

[midnght]

The 1G cams are said to be more aggresive than the 2G cams.

 

[jetdriven]

you want the cams from a 92-94 5-speed turbo.

 

[90AWDTalon]

you want the cams from a 92-94 5-speed turbo.

OK, but what are the A and C cams I have.