How Can I Fin Out The Diference Between Engine Na1 And Na2

[hevel1]

Hello. I need some help. I recentli bought a 1991 NSX, the old owner told me that he installed a NA2 engine on the car.

I want to get new headers. But i don really know if this is a 3.0 or 3.2. Any body outhere with some help? Thanks. Hector

 

[hevel1]

 

[Shumdit]

There should be serial #'s on the motor, which would likely help.

 

[paulviriyapan]

What color are the valve covers? The 3.2 NA2 has red, the 3.0 NA1 is black.

 

[BD]

I might be wrong, but NA2 will not work with 5 speed transmission, so if it's got six cogs, it might be true.

 

[ncdogdoc]

I might be wrong, but NA2 will not work with 5 speed transmission, so if it's got six cogs, it might be true.

Any engine will work with any transmission as long as you have the correct input shafts and clutch.

 

[ncdogdoc]

Hello. I need some help. I recentli bought a 1991 NSX, the old owner told me that he installed a NA2 engine on the car.

I want to get new headers. But i don really know if this is a 3.0 or 3.2. Any body outhere with some help? Thanks. Hector

The engine does not matter for header installation. The only thing is what exhaust setup you have. The 91-94 have the same, the 95-96 has the same, and the post 97 until ???? year has the same setup. Check out www.scienceofspeed.com to learn more, along with the FAQ on this site.

 

[BD]

Any engine will work with any transmission as long as you have the correct input shafts and clutch.

For some reason, I thought the bolt on patern is different between 5 speed and six speed. 5 speed uses 6 bults, 6 speed uses 7. I have seen an add on piece to update to 6 speed on the NA1, but I have never seen one that goes backwards.

 

[evof575gtc]

Hello. I need some help. I recentli bought a 1991 NSX, the old owner told me that he installed a NA2 engine on the car.

I want to get new headers. But i don really know if this is a 3.0 or 3.2. Any body outhere with some help? Thanks. Hector

to make easy on you, check the engine block:
NA1, engine code C30A - 3 liter
NA2, engine code C32B - 3.2 liter

any headers should work regardless of engine model. im guessing if you can put 97+ headers on a 91, you should be able to do it vice versa, right? dont quote me. i could be wrong.

many people upgrade their early models with OEM NA2/1997+ headers and it works. as far as the bungholes for the 02 sensors, i havnt a clue because i never looked into that, so i cant say i know for sure. :frown:

good luck

 

[4AU4LIFE]

What color are the valve covers? The 3.2 NA2 has red, the 3.0 NA1 is black.

I wouldn't go on that alone. I for one and know of several others that have powerder coated and or painted their covers red for the newer look.

 

[whiteNSXs]

For some reason, I thought the bolt on patern is different between 5 speed and six speed. 5 speed uses 6 bults, 6 speed uses 7. I have seen an add on piece to update to 6 speed on the NA1, but I have never seen one that goes backwards.

Hmmmm, as you stated if a six speed tranny can mate to naturally a NA2, and easily a NA1, sounds like a the mating surface is the same, right? So the five speed tranny can also mate to a NA2 engine with the appropriate input shaft and clutch.
Steve

 

[paulviriyapan]

...as far as the bungholes for the 02 sensors, i havnt a clue....

uh-hu-huh-huh-huh...you said bungholes

 

[BD]

Hmmmm, as you stated if a six speed tranny can mate to naturally a NA2, and easily a NA1, sounds like a the mating surface is the same, right? So the five speed tranny can also mate to a NA2 engine with the appropriate input shaft and clutch.
Steve

You guys are not reading me right, or I should say, I didn't do a good job expressing my self.

From what I understand. 5 Speed Tranny has a six bolt pattern, and the six speed has a seven bolt patter (to bold one to the engine). I could be wrong. Also, the five speed uses dual plate clutch, which will not work on C32B