turbo tranny / non turbo tranny

XxEclipseRcrxX · Feb 15, 2006

Well ive finally decided to keep my lovely 1g eclipse just because ive had to do so much work on it.. Im about to have the transmission rebuilt but before i do... Does anyone know if i can bolt up a turbo transmission on a 4g63 engine if its non turbo? If so, i need to replace the clutch with a turbo one? i mean ive done some research and from what i see... its the same exact layout almost, just diff gear ratios. Please help me out a little, i dont wanna go buy a used turbo tranny for rebuild if its not gunna work! (btw, im gunna be turbo charging this car very soon.. almost have all the parts :thumb:

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ImprtFLYby85 · Feb 16, 2006

if im not mistaking(dont quote me) but the n/t tranny has a better low end wich means better 0-60 time and the turbo has more of a top end set up, thats what i was told atleast when i asked the same question a while back

but if you were going to turbo your n/t you may wanna just simply upgrade ## n/t tranny little bit like maybe a centerforce d/f clutch or act 2100/2600 clutch, also they make a DOUBLE second gear syncro which i had put in mine when i got my trans done about a month ago and seems to work GREAT, i have a centerforce in my n/t and have no problems and i have some decent work done to mine

mavisky · Feb 16, 2006

NT has ratios similar to that of an awd, the problem is putting power down through those ratios. Sure they give you more torque on the road, but will that make it harder to drive out of the hole and end up costing you down the road?

91gsxdsm · Feb 16, 2006

my advice is to not do it, a turbo tranny on a nt isnt helpful ive done it, besides being able to have longer gears your slower in a 1/4. I had a turbo tranny on my 90 n/a laser and it was fun for the interstate up about 105 outta 3rd and such but really makes you regret it from dead stops and 40 rolls. If you decide to do it youll need a turbo flywheel, turbo clutch kit, and a turbo pass cv, n/t driver cv will work fine and possible tranny mount
from my experience it wasnt worth it....

92DSMErdrick · Mar 5, 2006

91gsxdsm said:
my advice is to not do it, a turbo tranny on a nt isnt helpful ive done it, besides being able to have longer gears your slower in a 1/4. I had a turbo tranny on my 90 n/a laser and it was fun for the interstate up about 105 outta 3rd and such but really makes you regret it from dead stops and 40 rolls. If you decide to do it youll need a turbo flywheel, turbo clutch kit, and a turbo pass cv, n/t driver cv will work fine and possible tranny mount
from my experience it wasnt worth it....

Sorry to bring this thread back after 2 weeks but i just found it now. I must have sat here trying to figure out what was meant by "turbo pass cv"? 91gsxdsm you say you need to have a turbo flywheel, turbo clutch kit for the Turbo tranny? I understand that a N/T clutch is 215mm and a turbo clutch is 225mm, so im guessing the N/T flywheel and clutch setup doesnt work in a Turbo tranny bolted up?? I could see a Turbo flywheel/cluch setup not working maybe in a N/T tranny. . .

I guess my real question is that if you were to take a Turbo Flywheel and clutch kit - put on a N/A motor(block,crank) and retained your N/T tranny would it work? would there be a bell housing problem for fitment or any starter problems due to possible diff flywheel sizes?

Thanks, Matt

91gsxdsm · Mar 5, 2006

92DSMErdrick said:
Sorry to bring this thread back after 2 weeks but i just found it now. I must have sat here trying to figure out what was meant by "turbo pass cv"? 91gsxdsm you say you need to have a turbo flywheel, turbo clutch kit for the Turbo tranny? I understand that a N/T clutch is 215mm and a turbo clutch is 225mm, so im guessing the N/T flywheel and clutch setup doesnt work in a Turbo tranny bolted up?? I could see a Turbo flywheel/cluch setup not working maybe in a N/T tranny. . .

I guess my real question is that if you were to take a Turbo Flywheel and clutch kit - put on a N/A motor(block,crank) and retained your N/T tranny would it work? would there be a bell housing problem for fitment or any starter problems due to possible diff flywheel sizes?

Thanks, Matt

To answer the question is no because
The turbo transmission and the N/T transmission have different sized bellhousing. I have a n/t laser that i messed with . i put a turbo head on the car(it has a larger intake cam). but about the tranny. I put a fwd turbo transmission on for two reasons to start with. i bought a turbo clutch kit thinking it would work fine for my n/t tranny(thinking there wasn't any difference. The flywheels are completely different look and size. The n/t tranny bellhousing wont even fit over a turbo flywheel. Therefor you have to get a turbo transmission (which i found out later). To make it work you simply need this .A Fwd turbo transmission and a turbo clutch kit (your preference) as long as its for the Fwd turbo. Now it will bolt up fine to the n/t engine.Your plate between the transmission and block will not fit right either (atleast in my case) My passenger side cv wouldn't fit into the hub assembly right. I went and bought a passenger cv from the parts store and told them it was for the turbo model and it went in fine. I don't know if they are different or not but thats what worked for me. My transmission mount was different as well, I got the Fwd transmission mount and it worked fine. Again I dont know if there is a difference but that is what I did to bolt it up. I liked it from 60+ mph but take off wasn't that great. Also after 3rd gear 4th takes a vacation. I didn't like how it was compared to the N/T tranny. I will say this though getting a turbo head (since you plan on going turbo) is a good idea.

92DSMErdrick · Mar 5, 2006

91gsxdsm said:
To answer the question is no because
The turbo transmission and the N/T transmission have different sized bellhousing. I have a n/t laser that i messed with . i put a turbo head on the car(it has a larger intake cam). but about the tranny. I put a fwd turbo transmission on for two reasons to start with. i bought a turbo clutch kit thinking it would work fine for my n/t tranny(thinking there wasn't any difference. The flywheels are completely different look and size. The n/t tranny bellhousing wont even fit over a turbo flywheel. Therefor you have to get a turbo transmission (which i found out later). To make it work you simply need this .A Fwd turbo transmission and a turbo clutch kit (your preference) as long as its for the Fwd turbo. Now it will bolt up fine to the n/t engine.Your plate between the transmission and block will not fit right either (atleast in my case) My passenger side cv wouldn't fit into the hub assembly right. I went and bought a passenger cv from the parts store and told them it was for the turbo model and it went in fine. I don't know if they are different or not but thats what worked for me. My transmission mount was different as well, I got the Fwd transmission mount and it worked fine. Again I dont know if there is a difference but that is what I did to bolt it up. I liked it from 60+ mph but take off wasn't that great. Also after 3rd gear 4th takes a vacation. I didn't like how it was compared to the N/T tranny. I will say this though getting a turbo head (since you plan on going turbo) is a good idea.

Thanks for the explanation. I figured that the bell housings were different sizes. I retained my N/T head, but i put in manual gsx turbo cams so i have the intake cam your talking about. I found this posting b/c i was looking for peoples suggestions on N/T 7bolt flywheels. Fidanza only makes N/T flywheels in 6bolt patterns and not for 93-94 7bolt. ACT doesn't make light flywheels for either 6 or 7bolt N/T flywheels. I'm thinking about asking RRE if they can lighten a N/T flywheel. I see on there website that they do AWD and FWD flywheels, but it doesn't reference to N/T or Turbo. Im thinking about doing the LSD insert and if the tranny is off the car i thought why not look into a flywheel since i allready have a upgraded clutch, might as well do it all when the tranny is off the car

91gsxdsm · Mar 5, 2006

That is true, I for some strange reason prefer a stock flywheel . I have heard alot of different opinions on it but either way i hope it works out for you. I take it your doing a n/t build? If thats the case then keep me informed via pm or somthing and let me know how its going. Ive been toying with the idea of doing it because no one suggest it and I like to be different Lol

92DSMErdrick · Mar 6, 2006

Was your Flywheel for a Turbo FWD. I've been posting now on this other thread:
http://www.dsmtuners.com/forums/showthread.php?p=1826980 and

TimG says that the AWD flywheel seems to be the same size as the FWD N/T flywheel. This in interesting to me b/c how can it be the same size when all turbo clutches are bigger(225mm) compared to N/T(215mm) So maybe it's possible to use a AWD flywheel and clutch setup with the N/T tranny. . .but i would have thought someone would have realized this awhile back especially the N/T people

91gsxdsm · Mar 6, 2006

Yes it was, I bought a stock flywheel from autozone and a stage 1 F1 racing clutch off ebay (tried saving money at the time LOL

) for a 1991 mitusbishi eclipse fwd turbo. My car is a 1990 plymouth laser n/t. At first I called the company who sold me the clutch thinking it wasn't the right one. He then told me there is a difference between a turbo and non turbo clutch kit. The non turbo flywheel is "flat" as were a turbo flywheel is recessed back a little bit . They look completely different. As far as a awd clutch working is beyond me, I am not sure if its true or not I just simply am telling you what will and what did work for me. Good luck with it either way.

mavisky · Mar 6, 2006

92DSMErdrick said:
Was your Flywheel for a Turbo FWD. I've been posting now on this other thread:
http://www.dsmtuners.com/forums/showthread.php?p=1826980 and

TimG says that the AWD flywheel seems to be the same size as the FWD N/T flywheel. This in interesting to me b/c how can it be the same size when all turbo clutches are bigger(225mm) compared to N/T(215mm) So maybe it's possible to use a AWD flywheel and clutch setup with the N/T tranny. . .but i would have thought someone would have realized this awhile back especially the N/T people

I could've swore I replied to this earlier :confused:

Nt and awd are only similar in the ring gear diameter. Every other facet of their design is different. The nt bellhousing is too shallow to accept either turbo clutch/flywheel combo and too small in diameter to work with the fwd turbo. I've played with nearly every possibly combination over the last 5 years.

fwd turbo tranny - fwd turbo clutch/flywheel only
fwd nt tranny - fwd nt clutch/flywheel only
awd turbo tranny - awd turbo or nt clutch flywheel, awd is obviously the better option.

Of course all that applies to 1g's and 2g turbo's. Don't even try to mix anything for a 2g nt with any other model.

badas93tsi · Mar 7, 2006

i have a friend who is gonna put a 1.8 tranny in a 2.0 n/t car. first of all will it fit? is the gear ratio in the 1.8 lower than the 2.0?

mavisky · Mar 7, 2006

badas93tsi said:
i have a friend who is gonna put a 1.8 tranny in a 2.0 n/t car. first of all will it fit? is the gear ratio in the 1.8 lower than the 2.0?

It'll fit, other than that I don't care as I personally never even considered working on a 1.8 for any reason.

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turbo tranny / non turbo tranny

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