Hi to modders out there,

I'm David from indonesia. I'm planning to do engine conversion project. I'm still blind about the diff matter. Can the stock diff be used ? If it is, what pinion gear ratio would be preferable ? I'm only using the car within the city, hardly go to highway. Which pinion gear can I use from ?

Your reply is highly appreciated. Thank you very much,

David L

 

My favorite for street are 4.44 and 4.78 from a kia spotage front diffy coz im cheap

 

Is the stock differential can be used or not ? What's the diff ratio ?

 

Stock is 3.7 qnd here in the states, SP models have snort pinion shaft like the 79-85 rx7 whike non-sp have long pinion shaft. Use pre83 gsl 3rd member as it has lsd and same axle but you need to make the driveshaft longer

 

i remember hearing a while back that the 808 with auto tranny had 4.10

 

If anyone is interested, I have the complete rear diff from the 77 RX-3 SP I parted out

 

Youre correct. Driving wisethe dfference between 3.7 to 4.10 is hardly noticeable. if i can only afford a 4.30 from a S2000, i will go with that for street/freeway driving

 

Can you show me what parts do you have ? Do you have the photos of the parts ? Please show them to me first.

 

I parted out a 77SP RX-3 last year. I have the complete diff drum to drum and the driveshaft. Everything else is gone already.