S15 HLSD Final drive

[Kevin S13]

Hey guys, I would like to know if the 4.636 or the 4.364 final drive fit on my S13 Silvia VLSD Pumpking with a S15 HLSD?

http://www.thenismoshop.com/catalog/240 ... 240SX.html

[badbob2121]

why would you want to change it? i didnt with my hlsd

[Kevin S13]

To increase acceleration and response.

[badbob2121]

depending on what kind of set up you have... maybe

but i just used the same one and its everything i wanted... let me know what you end up doing... im interested

[Kevin S13]

For now I have my VLSD Final Drive (3.9) hooked up to my HLSD. My setup is base on response and acceleration, no top speed, so that's why I'm asking about the 4.636 or 4.364.

[kouki munster]

I should work just fine, the s15 hsld is designed to fit in the rv200 diff housing using any gear set that was designed to for a rv200 diff.

[Kevin S13]

Here are my calculations
mph = (rpm * cir) / (gear * final * 88)
I used for the circumference tire size 225/45R18
75 mph = (3000[rpm] x 6.8[foot]) / (0.759[5th gear]x4.080[final drive] x 88)
70 mph = (3000[rpm] x 6.8[foot]) / (0.759[5th gear]x4.364[final drive] x 88)
66 mph = (3000[rpm] x 6.8[foot]) / (0.759[5th gear]x4.636[final drive] x 88)

87 mph = (3500[rpm] x 6.8[foot]) / (0.759[5th gear]x4.080[final drive] x 88)
82 mph = (3500[rpm] x 6.8[foot]) / (0.759[5th gear]x4.364[final drive] x 88)
77 mph = (3500[rpm] x 6.8[foot]) / (0.759[5th gear]x4.636[final drive] x 88)

So with a 4.636 it should be in the right rev range

[ILoveMyRHS13]

4.6 is a bit excessive.

I would vote 4.36

[Kevin S13]

I don't know....my Prelude has the same rev range. At 60pmh I'm at 3000RPM and a 75mph I'm at 3500 and I think it will be the perfect range.

Note that I have 18''

[S14toRPS13]

It states it's forthe R200, so it should fit. If you're horsepower output is anywhere close to 300, all you'll be doing is spinning those rear wheels all day with that final drive. Then again, I'm assuming that's your intention anyways.