N/T Talon Head on a Turbo Eclipse? [1G]

[Oblivion02]

Recently, I had to take my Head to a machine shop to get some work done on it. Unfortunately, they told me it was not worth my time or my money. So I decided to buy a whole new car, just for the engine. This afternoon, I'm getting a 1990 Eagle Talon N/T for 500 dollars. I figured the head should work, since it is a 1G DSM as well. Now I noticed that the N/Ts came DOHC and OHC. I'm not sure which one it is, since I have not personally seen the car, it was my father. If it is a OHC, will it still work on my 1G Turbo Eclipse? Will a N/T head fit on my Turbo Eclipse? If I'm not mistaken, it should... Since 2.0 N/T Engine and 2.0 Turbo Engine are both 4G63's. Hopefully someone with more knowledge can help me out here. Thanks!

 

[Sinner]

the ohc that you speak of is a 1.8 liter and the dohc is a 2.0 that came in either turbo or non turbo, if you have the 1.8 then you wasted your money as it will not work but if it is a 2.0 non turbo it will work but you will have to use your cams from the turbo head.

 

[Oblivion02]

I just checked. Its a 2.0 DOHC, thank God.

Is replacing the cams really necesary? Will it affect the performance?

 

[90blacktsiawd]

Yes it will affect performance. The cams in the NT are not designed for a motor with forced induction like what you currently have. Yours are more aggressive.

 

[yesItsdsm]

You really only HAVE to change the intake cam. The exhuast cam is the same. In reality you dont have to change the cams at all - your car would be slower though

In regards to strength they are equally strong. It's the specifications of the cam you have to worry about.

 

[kenamond]

If it's not too late, call the mechanic that was looking at your head (would that be a psychiatrist or a neurosurgeon?) and ask him if the cams looked okay.

 

[Oblivion02]

Will call him right now. I do believe they were fine, it was just that the previous owner had apparently overheated the car one too many times, and the head was grinded down ALOT. I'll call and let you guys know.

 

[Oblivion02]

He didnt pick up. Will the cams fit right on the N/T head? or does it need some work?

The Talon Engine for some reason says Mitsubishi. Not sure if this happens with all talons, or if this one just has an eclipse engine.

 

[Sinner]

He didnt pick up. Will the cams fit right on the N/T head? or does it need some work?

The Talon Engine for some reason says Mitsubishi. Not sure if this happens with all talons, or if this one just has an eclipse engine.

Ok, the cams swap in just fine the two heads are identical, all 1st gen. dsm's use mitsubishi motors no matter what the make.

 

[DSMboostin15]

They are all Mitsubishi engines. The only difference is the name the factory decided to slap on the car that day. As for the cams, they will bolt right in.

 

[Purevil]

Actually, not all 1g 4g63 heads are the same. 1990 n/t heads do have smaller coolant passages than all the rest, but its not enough to make a difference in performance. N/t 4g63 heads from 91-94 and turbo heads from 90-94 are the exactly same.

 

[Oblivion02]

The car I bought is a 1990 Eagle Talon N/T, and my actual car is an Eclipse GS-T 1991. Does the 1990 head, with smaller coolant passages, need any work to fit in my 1991 Turbo Eclipse? Will this make my car overheat easier?

Oh, more great news by the way... The whole engine of my eclipse was messed up. I'm getting new turbo pistons tomorrow to put them on the 1990 Engine, and also putting the 1991 Cams on the 1990 Engine.

 

[delta448]

...if it is a 2.0 non turbo it will work but you will have to use your cams from the turbo head.

Yes it will affect performance. The cams in the NT are not designed for a motor with forced induction like what you currently have. Yours are more aggressive.

Does anyone have the specs of the 1G N/T cams? I could swear that I heard the 1G N/T had more duration, and also were timed for more overlap. I remember thinking it made sense because the n/a needs more cam to develop decent overall power, whereas the F/I needs less overlap to keep the low end response with it's low compression. I agree that the design is for different goals, but I was under the impression that at least the 1G N/T intake cam was an upgrade if mechanically timed for F/I.

Please explain or provide the specs.

 

[kenamond]

Does anyone have the specs of the 1G N/T cams? I could swear that I heard the 1G N/T had more duration, and also were timed for more overlap. I remember thinking it made sense because the n/a needs more cam to develop decent overall power, whereas the F/I needs less overlap to keep the low end response with it's low compression. I agree that the design is for different goals, but I was under the impression that at least the 1G N/T intake cam was an upgrade if mechanically timed for F/I.

Please explain or provide the specs.

Along those lines, are the valve springs, rockers, lifters the same, too?

 

[Purevil]

Along those lines, are the valve springs, rockers, lifters the same, too?

Identical parts are used in both turbo and n/t heads. The newer Evo's even use the same oldschool dsm intake valves.

Does anyone have the specs of the 1G N/T cams? I could swear that I heard the 1G N/T had more duration, and also were timed for more overlap. I remember thinking it made sense because the n/a needs more cam to develop decent overall power, whereas the F/I needs less overlap to keep the low end response with it's low compression. I agree that the design is for different goals, but I was under the impression that at least the 1G N/T intake cam was an upgrade if mechanically timed for F/I.

Please explain or provide the specs.

Brian Crower's website states that the n/t intake cam uses 256' duration vs the turbo cars 248'. If this were true, then a car running 2 n/t intake cams (yes, it is possible to run 2 intake cams) would give you a setup right between a stock cam and aftermarket 264's. However, people have ran n/t cams before and most say the turbo cams do have a noticable difference and pull harder on the top end. I'm not sure how accurate the numbers on BC's site are, if they are true then yes the n/t cams should make more power, but everyone who has used them seems to says otherwise.

I have 2 n/t intake cams, but my engine is out of the car right now. Anyone want to be a guinea pig and try them out?

 

[91whiteGSX]

Hey guys .. im new to the DSM I have a 91 GSX 5spd .. Now i took my valve cover off and the head is like a brass color all inside.. and I got a used head off ebay off of a 93 TSI AWD 5pd ... and that head is not its all that silver color inside..... Now my head thats on the car says 2.0L 5 with a M on it in a circle... and the 93 head has 2.0L with a 6 and the M ... now will this head still fit on my car... or should i just sent the head thats on my car to the shop to get tanked and decked.. i dont know what im doing im lost my car has a 109,000 Org miles and the guy said the 93 head had 89,000 on it... so im kinda lost any input would be great... ??? thanks guys