queation about rear diff

[E30 318T]

What E30 Diff . would be good too handle 260Hp +?
im thinking about putting an 13B S4 Turbo II (Rotary) motor in my E30..

[parkerbink]

good queation.

[bimmerdreamer]

rotary in an e30. Sounds interesting, why though? IMO thats alot of work/money to have a less reliable motor. There are a lot of ways to get 260+ hp in an e30, i think swapping a turbo 13b is least logical. More props to you if you get it done- it would be unique.

[erik325i]

Any of the diffs can handle 260hp. It just depends on what tranny you are planning on using to determine the propper gear ratio.

-Erik

[porsche gt1]

Best is the 4.10 second to the 3.73 for high output. If it is lower than that you will have issues.

[MR 325]

My 3.73 had no trouble holding roughly that amount of HP.

[DarkWing6]

My 3.73 had no trouble holding roughly that amount of HP.

Would a 4.10 have been better since it would get to the point where the turbo kicks in faster?

[E30 318T]

truee i have a shop over here in NYC that is specialized in Rotary. the swap and labor is goin to be around $5000-$6000 since the motors+ tranny are at a decent price which is $1700-$2500 and it would only take up have of the engine bay VERus the M50,M30 motors... and thank you for answering my Diff question....

[MR 325]

Would a 4.10 have been better since it would get to the point where the turbo kicks in faster?

Usually people go with higher gearing actually. I was pretty happy with the stock diff though.

[DarkWing6]

I really think the gearing you go with would depend on the turbo. With one like Matt's, you would want something like a 3.73 or 4.10 since it kicks in later, but with a smaller turbo that kicks in earlier you would want something with higher gearing. Does this sound right?

[E30 318T]

im still learning about gear Ratios if i do, do the swap i will do it between spring and summer. and it will be run stock on a stock turbo until i want more power thats why i stated 260 + hp

n also stock rotary motors like the one tha im thinking has more potential than you think. a friend of my had a non turbo 13b in his car and stated from factory i think 200hp and it could take out 350z and those are 280hp (just an example) on drag or highway..and those are highway cars if you ever encountered one.

[PУCCKAЯ_e30ka]

why not get a sr20det? a little less hp but easier and i bet cheaper to install...

[E30 318T]

same price or cheaper and easier to modd for high hp...

why not get a sr20det? a little less hp but easier and i bet cheaper to install...