HEAD TECH... ALL TECHs PLEASE RESPOND!!!!

[ArgonLaser92]

ok here is the deal...
92 Laser RS Turbo AWD needs head ...

Will a N/a Head off of a 4g63 work on a 4g63t assuming that i use the cams and valvetrain...?

Are the valve's different sized from each head?

if Not what mods are required to make it work ?


PWEEZ HELP ME ahh =P

 

[na90dsm]

im am not a tech by far but i had a similar question and from what i heard the heads are identical.the only difference are the cams.i tried to find the thread but i cant find it.thats what i was told just thought it would help.

 

[Emptytoys]

Yes the heads are the same, valves are the same etc. The only difference is the cams, accutally only one of them but I don't remember which.
So a NT head will bolt directly on a Turbo, you will just have to take out the oil plug for the turbo.

Matt

 

[89mustang5.0]

yeah they will bolt but the cams are diffrent and the valve have diffrent duration per cam so you are talking major work for this head job but hey if you feel the need more power to you.....

 

[ArgonLaser92]

I realize that im a new guy to the board.. and i don't want to come across as a ass but i must ask in response to "89mustang5.0"
how is it major work to replace the cams with the turbo cams from the broken head i have?
just conferming that the camlobe is what "controls" the duration....

i figured that if i use a n/a head... it would be no problem with just the cam after getting replys to my post.... i just had to conferm with this board.. along with www.4g61t.com and clubsi.com so blah..
but to recap. just wondering... why do you consider this "major work"?

Originally posted by 89mustang5.0
yeah they will bolt but the cams are diffrent and the valve have diffrent duration per cam so you are talking major work for this head job but hey if you feel the need more power to you.....

 

[ItsStockOfficer]

Originally posted by 89mustang5.0
yeah they will bolt but the cams are diffrent and the valve have diffrent duration per cam so you are talking major work for this head job but hey if you feel the need more power to you.....

Not to be a jerk but, your a moron, cam swap is cake and please explan what "vlave have different duration per cam" means?

 

[UltraImports]

"what's in a name?"

 

[ArgonLaser92]

ok i just have to agree... installing cams is honestly really easy..

sorry had too...

Originally posted by ItsStockOfficer


Not to be a jerk but, your a moron, cam swap is cake and please explan what "vlave have different duration per cam" means?

 

[Beemer]

Also, believe it or not, but the 1.6 liter DOHC turbo Mitsubishi motor in the dodge colt and the mirage uses the same head as the 2.0. I am running a 1.6 head on my 90 gsx right now, and I compared the ports with my 2-liter head and they were exactly the same. Swap the cams, it takes 15 minutes tops. For the mustang weenie, the cam controls the duration and lift, not the valve. Valve sizes are the same on all 4G63 engines. The only difference I have seen is that the turbo heads have valves made of a slightly different material than the NT's to deal with the heat. I would advise at least using the turbo exhaust valves. I have found that the n/a exhaust valves have a tendancy to burn, especially in #4 cylinder. No, I don't know why it happens on #4 either, I just know that it happened twice on 2 different motors, so I swapped out the exhaust valves with new turbo valves and haven't had a problem since. Might be that is the hottest cylinder, since it is the furthest from the water pump. Just my .02 cents worth
dave

 

[P8ntBalla]

but isnt it also the closest cylinder to the pump side of the fuel rail? that might (probably) make it run slightly richer than the other three, thus cooler on hte exhst side at least. isnt that why everyone recommends that the egt temp probes get installed on the #1 runner(closest to the belts)?

 

[autoxr37]

Originally posted by 89mustang5.0
yeah they will bolt but the cams are diffrent and the valve have diffrent duration per cam so you are talking major work for this head job but hey if you feel the need more power to you.....

Maybe he thinks he's doing a cam swap on an 5.0 Stang?

 

[GrocMax]

Originally posted by Emptytoys
Yes the heads are the same, valves are the same etc. The only difference is the cams, accutally only one of them but I don't remember which.
So a NT head will bolt directly on a Turbo, you will just have to take out the oil plug for the turbo.

Matt

Nope, the N/T uses a different exhaust valve. However all (factory) replacement valves are the same. The Turbo exhaust valve has better high temp capabilities.

 

[GrocMax]

Originally posted by Beemer
Also, believe it or not, but the 1.6 liter DOHC turbo Mitsubishi motor in the dodge colt and the mirage uses the same head as the 2.0. I am running a 1.6 head on my 90 gsx right now, and I compared the ports with my 2-liter head and they were exactly the same.

If this is true the head had been previously swapped. 1.6L came with ports very similar to a 2G, and cast into the end of the head is "1.6L" or "1.8L".

I have heard from many people that they have found 1G 2.0L heads after purchasing the Colt/Mirage used, this is more than likely NOT the original head. The P/N for a 1.6L DOHC head is MD153518 which supercedes to MD147284 and are unique to the Colt/Mirage 1.6L.

 

[ArgonLaser92]

Originally posted by Beemer
Also, believe it or not, but the 1.6 liter DOHC turbo Mitsubishi motor in the dodge colt and the mirage uses the same head as the 2.0. I am running a 1.6 head on my 90 gsx right now, and I compared the ports with my 2-liter head and they were exactly the same. Swap the cams, it takes 15 minutes tops. For the mustang weenie, the cam controls the duration and lift, not the valve. Valve sizes are the same on all 4G63 engines. The only difference I have seen is that the turbo heads have valves made of a slightly different material than the NT's to deal with the heat. I would advise at least using the turbo exhaust valves. I have found that the n/a exhaust valves have a tendancy to burn, especially in #4 cylinder. No, I don't know why it happens on #4 either, I just know that it happened twice on 2 different motors, so I swapped out the exhaust valves with new turbo valves and haven't had a problem since. Might be that is the hottest cylinder, since it is the furthest from the water pump. Just my .02 cents worth
dave

are you kidding me... really ....i have the head to my 89 mirage turbo.... And your saying it will work.. do in fact they have 1.6 or 2.0 on the side of the head... on the accually left side.. (cam sensor side)

so all the coolent channels match up ..?

will the mani's match up?

Since you did it are there any difference's in power from the head? MORE/LESS?

if it works .. im doing it.. if not.. im building a 2.0 n/a head with crower valves.. =)

 

[ArgonLaser92]

Originally posted by Beemer
Also, believe it or not, but the 1.6 liter DOHC turbo Mitsubishi motor in the dodge colt and the mirage uses the same head as the 2.0. I am running a 1.6 head on my 90 gsx right now, and I compared the ports with my 2-liter head and they were exactly the same. Swap the cams, it takes 15 minutes tops. For the mustang weenie, the cam controls the duration and lift, not the valve. Valve sizes are the same on all 4G63 engines. The only difference I have seen is that the turbo heads have valves made of a slightly different material than the NT's to deal with the heat. I would advise at least using the turbo exhaust valves. I have found that the n/a exhaust valves have a tendancy to burn, especially in #4 cylinder. No, I don't know why it happens on #4 either, I just know that it happened twice on 2 different motors, so I swapped out the exhaust valves with new turbo valves and haven't had a problem since. Might be that is the hottest cylinder, since it is the furthest from the water pump. Just my .02 cents worth
dave

are you kidding me... really ....i have the head to my 89 mirage turbo.... And your saying it will work.. do in fact they have 1.6 or 2.0 on the side of the head... on the accually left side.. (cam sensor side)

so all the coolent channels match up ..?

will the mani's match up?

Since you did it are there any difference's in power from the head? MORE/LESS?

if it works .. im doing it.. if not.. im building a 2.0 n/a head with crower valves.. =)

 

[Emptytoys]

So it was just the exhaust valves that were different on STOCK engines....
Learn something new everyday!!

Matt

 

[Stock90GSXT]

Originally posted by Emptytoys
So it was just the exhaust valves that were different on STOCK engines....
Learn something new everyday!!

Matt

So the exhaust valves are similar in size and feel. if you had them side by side. How could you tell them apart. I do have two exhaust valves right now I got from a guy off the trader. I compared 1 with my current valves off my GSX. I noticed there is a 6t stamped on the valve face of the GSX head. And the other valve is plain. Keep in mind, standing them on the face they look identicle.