Gearing change
vwjeff, I'm going to take advantage of gearing, so I'm going to try to get a built tranny with closer 4-5. I'm still not sure who sells the .82 5th. That would really help with big turbo and the 4.52's. My calculations show a little help in 5th would keep the engine in power range .
Are you gonna road racing or drag?
Seems my RS has a 4.56 so just divide 4.11/4.56 and you get the percent change. It is almost 10% exactly so just add 10% to you max mph in each gear. I am going to use this gear to go with a 2.3L that I am building to help with higher trap speeds.
I run a taller tire on the stock rims. A 235/50/17 is about a 3.5% change. You can figure that up but you can pick up a 3-5 extra mph in 4th at the same rpm. Plus the taller tire is a little more flexible and works better for dragracing.
Bump for an interesting topic. I was actually looking through some other threads on gearing between the evo 8 and 9 and it seems the 8 had longer gears for 3-5.
I was pondering the idea of keeping the gearing of the stock 9 for 1st and 2nd, changing out 3-5th from the 8 and dropping the hks 4.11. It should make for a decent highway cruiser, especially on long commutes.
Thoughts?
I was pondering the idea of keeping the gearing of the stock 9 for 1st and 2nd, changing out 3-5th from the 8 and dropping the hks 4.11. It should make for a decent highway cruiser, especially on long commutes.
Thoughts?
I'll be doing drags. I've calculated that 28.5" tire with 4.52 is what it would take to use stock gearing and crossing the traps in 4th at 9489rpm. Looks like a change in 5th gear to the .82 would allow a shift to 5th without loosing spoolup and rpm.