Is the 6 speed better for road racing
Jan 23, 2012, 11:11 PM
#16
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Even the built 6 speeds are going to break at much more than what you are looking to run. If the speed bug bites you after you buy the built 6 speed you are back at square one. Trust me, build a 5-speed and call it a day.
Jan 24, 2012, 07:51 AM
#17
The 6 speed to me would be a better road race tranny due to the gearing. However, the 6speed tends to overheat and will shiz gears on you. You can do a built 6speed with an oil cooler. That will help out significantly and would be a fun car to whip around the corners sir.
Mikey
Mikey
Jan 24, 2012, 08:09 AM
#18
The 6 speed to me would be a better road race tranny due to the gearing. However, the 6speed tends to overheat and will shiz gears on you. You can do a built 6speed with an oil cooler. That will help out significantly and would be a fun car to whip around the corners sir.
Mikey
Mikey
Like this? If only Shep still offered it...
Jan 24, 2012, 08:28 AM
#20
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The 6 speed is better on the video I watched comparing the 5 an 6, but shep has a new rebuild for the 6spd good to 600whp which I think is the most you'll really need for the track. Here's a thread that someone did for the 6 https://www.evolutionm.net/forums/ev...rans-6spd.html
Jan 24, 2012, 10:11 AM
#22
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The 6 speed to me would be a better road race tranny due to the gearing. However, the 6speed tends to overheat and will shiz gears on you. You can do a built 6speed with an oil cooler. That will help out significantly and would be a fun car to whip around the corners sir.
Mikey
Mikey
Jan 24, 2012, 10:15 AM
#23
This is not true. I used to run a 6-spd and now a built 5-spd. I have different problems at different areas of the same track with the transmissions. Between the two I FAR prefer the 5-spd with the hybrid gearing Shep offers. If you talk to John, he will recommend the 5-spd with the hybrid gearing for road racing every time.
Thank you for your input!
Mikey
Jan 24, 2012, 10:22 AM
#24
This is not true. I used to run a 6-spd and now a built 5-spd. I have different problems at different areas of the same track with the transmissions. Between the two I FAR prefer the 5-spd with the hybrid gearing Shep offers. If you talk to John, he will recommend the 5-spd with the hybrid gearing for road racing every time.
Jan 24, 2012, 10:38 AM
#25
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If that is true then I stand correct, as I myself don't personally road race. I have been told by other they prefer the 6 speed. That was the reasoning so many people a year or two back tried everything they could to make the 6speeds hold up to excessive heat/autox days.
Thank you for your input!
Mikey
Thank you for your input!
Mikey
My first question is if the 6spd actually sees more heat loading than the 5spd?
Jan 24, 2012, 11:52 AM
#28
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What I found is that the 6-spd gears 1st-3rd where uncomfortably close together. Shifting through them was more of a hassle than anything. The biggest area I had a problem with the 6-spd was turn 8 on Summit Main. Entering that turn I would be in 4th and just hitting peak torque which would badly unsettle the car. Up a gear and I had no steam, and down a gear I was losing lots of speed. When I swapped transmissions I can take turn 8 easing into throttle in 4th and carry vastly more speed through that turn.
The downside to it is on Turn 10 where I used to be able to enter in 5th gear on throttle I wasn't able to do so with the 5-spd last season. With street tires and factory aero I couldn't carry that turn in 5th above my spool-up rpms. I would either enter the turn with NO boost and slug down the front straight... or I would go in capping out 4th almost banging off the rev limiter. I upped the rev limit a few hundred rpms and it still was causing me to lose speed in turn 10.
My solution for this season is to go to better tires and full aero... I should be able to take turn 10 significantly faster in 5th with plenty of rpms to keep the turbo on boil. Of course I'll be running at a bunch of new tracks this year, so who knows what the gearing will be like there. The car makes plenty of power though, so I don't need the super close-ratios of the lower gears. The 5-spd is smoother engagement, far stronger, and because of the gearset size has more fluid and more room for the fluid to circulate.
Also, in my case, I'm running on the stock block for this season, but I'll be building the motor next season and shooting for ~500 whp on E85. I broke 4th gear in my 6-spd at my current power levels, no way it holds up to what I have planned.
Jan 24, 2012, 12:17 PM
#30
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Here's a funny question ... one thing that we all feel is the ratios in the end ... the end being rpm out of the motor.
The 4B11T in the Evo X has been a really nice upgrade in that since it 'safely' spins roughly 1000rpm higher. The 5sp in the X hasn't had quite the same heartache as the VIII and IX.
I would love some responses in that is it better overall to try and eek out higher rpm in a 4G63 and keep a 5sp. or go for the 6sp.?
~j.
The 4B11T in the Evo X has been a really nice upgrade in that since it 'safely' spins roughly 1000rpm higher. The 5sp in the X hasn't had quite the same heartache as the VIII and IX.
I would love some responses in that is it better overall to try and eek out higher rpm in a 4G63 and keep a 5sp. or go for the 6sp.?
~j.