Im pretty sure the hole evo3 gearing is stronger than the stock dsm gearing. I have no experience with the gearing but have seen them take alo of abuse.

 

see I'm not sure if they're stronger..
I know they will wear better because of the double syncros and closer ratio

 

I almost positive that the EVO gears are wider hence more stronger. The gear ratio for the EVO III is Gearbox: 5 speed Manual
- Gear Ratio 1: 2.750
- Gear Ratio 2: 1.684
- Gear Ratio 3: 1.160
- Gear Ratio 4: 0.862
- Gear Ratio 5: 0.617
- Reverse: 3.156
- Final Gear: 5.358
http://evo3.autoalbum.nl/cars/12

 

Is there anyone on here running evo3 gears? Esp making 5-600hp?

 

I am. I kept blowing teeth off gears on a few other transmissions. This one is still intact, so i'd say they're strong

I run (ran for awhile, no more E85 around here) a higher CR stroker setup with lots of timing advance.

 

http://www.dsmtalk.com/forums/showthread.php?t=207871

Think Ill be joining you with the evo3 gears one day.
I just want evo3 3rd and 4th. They should be a little stronger, everyone at Jacks transmission loves them. There are a few cars there I think making over 600 or around 600 with those gears.

Id like to see a chart showing what speed each Evo3 gear ( namely 3rd and 4th) takes you to at different rpms...

 

On either Jack's site or TRE's site they say that the whole gearset is stronger.

 

The Evo3 gears will take a beating like no other are said to be the strongest setup for are cars. Im getting Jacks Evo3 drop in setup. The numbers below is the MPH from Jacks site.

STOCK EVO 3
RPM SPEED SPEED
8000 183.51 200.35
7500 172.04 187.83
7000 160.57 175.31
6500 149.10 162.79
6000 137.63 150.27
3000 68.82 75.13
2500 57.35 62.61
2000 45.88 50.09
1500 34.41 37.57
1000 22.94 25.04

 

spoolnbreak, nice to know the evo gears held up for you like that. I am certainly gong to run these gears so I wont be afraid of being unreliable if I ever decide to venture past my original goal of 450awhp.
dsmusmc , im trying to find the speeds for 3rd and 4th gear vs rpm.

 

I'm trying to find the speeds for 3rd and 4th gear vs rpm.

http://www.f-body.org/gears/

 

Tire Size: 26" (Hoosier QTP 26"x9.5"x16 used for reference)
Axle Ratio 4.929
Redline (RPM) 10,500
First Gear 3.083
Second Gear 1.684
Third Gear 1.160
Fourth Gear 0.862
Fifth Gear 0.610

Values are in MPH.

RPM <> 1st EVO3 <> 2nd STOCK <> 3rd EVO3 <> 4th EVO3 <> 5th EVO3
500 5 7 9 13
600 3 6 8 11 15
700 4 7 9 13 18
800 4 7 11 15 21
900 5 8 12 16 23
1000 5 9 14 18 26
1100 6 10 15 20 28
1200 6 11 16 22 31
1300 7 12 18 24 33
1400 7 13 19 25 36
1500 8 14 20 27 39
1600 8 15 22 29 41
1700 9 16 23 31 44
1800 9 17 24 33 46
1900 10 18 26 35 49
2000 10 19 27 36 51
2100 11 20 28 38 54
2200 11 21 30 40 57
2300 12 21 31 42 59
2400 12 22 32 44 62
2500 13 23 34 46 64
2600 13 24 35 47 67
2700 14 25 37 49 69
2800 14 26 38 51 72
2900 15 27 39 53 75
3000 15 28 41 55 77
3100 16 29 42 56 80
3200 16 30 43 58 82
3300 17 31 45 60 85
3400 17 32 46 62 87
3500 18 33 47 64 90
3600 18 34 49 66 93
3700 19 34 50 67 95
3800 19 35 51 69 98
3900 20 36 53 71 100
4000 20 37 54 73 103
4100 21 38 55 75 105
4200 21 39 57 76 108
4300 22 40 58 78 111
4400 22 41 60 80 113
4500 23 42 61 82 116
4600 23 43 62 84 118
4700 24 44 64 86 121
4800 24 45 65 87 123
4900 25 46 66 89 126
5000 25 47 68 91 129
5100 26 48 69 93 131
5200 26 48 70 95 134
5300 27 49 72 96 136
5400 27 50 73 98 139
5500 28 51 74 100 141
5600 29 52 76 102 144
5700 29 53 77 104 147
5800 30 54 78 106 149
5900 30 55 80 107 152
6000 31 56 81 109 154
6100 31 57 83 111 157
6200 32 58 84 113 160
6300 32 59 85 115 162
6400 33 60 87 117 165
6500 33 61 88 118 167
6600 34 62 89 120 170
6700 34 62 91 122 172
6800 35 63 92 124 175
6900 35 64 93 126 178
7000 36 65 95 127 180
7100 36 66 96 129 183
7200 37 67 97 131 185
7300 37 68 99 133 188
7400 38 69 100 135 190
7500 38 70 101 137 193
7600 39 71 103 138 196
7700 39 72 104 140 198
7800 40 73 106 142 201
7900 40 74 107 144 203
8000 41 75 108 146 206
8100 41 75 110 147 208
8200 42 76 111 149 211
8300 42 77 112 151 214
8400 43 78 114 153 216
8500 43 79 115 155 219
8600 44 80 116 157 221
8700 44 81 118 158 224
8800 45 82 119 160 226
8900 45 83 120 162 229
9000 46 84 122 164 232
9100 46 85 123 166 234
9200 47 86 124 167 237
9300 47 87 126 169 239
9400 48 88 127 171 242
9500 48 89 129 173 244
9600 49 89 130 175 247
9700 49 90 131 177 250
9800 50 91 133 178 252
9900 50 92 134 180 255
10000 51 93 135 182 257
10100 51 94 137 184 260
10200 52 95 138 186 262
10300 52 96 139 188 265
10400 53 97 141 189 268
10500 53 98 142 191 270

 

Thanks Tim^

The Evo3 gear ratio doesnt look any different then what I got going on at 7k redline with the stock gears now. If anything slightly higher? Unless my speedometer is off.
7K at 3rd gear is like low 90mph range now, and 7k at 4th gear is like low 120mph range for me on my stock 1g gears, and the evo gears are suppose to be shorter?

I know tires have a effect though. So I forgot how it works with the tires, like you get more mph with the taller tire right?

I only have 225/50/16s

 

Taller tire gives you more mph, yes.
The EVO 3rd and 4th gear are slightly shorter than stock DSM gears, so it'll raise rpm for a given mph.
another way of looking at it is the EVO gears will give you less mph for a given rpm.

 

Ok this is what I think I am going to do.

Evo3 4th gear ( I have a 92 tranny so should just drop right in like JackM said.)
and then to save money instead of evo3 3rd, ill just do a fresh OEM 3rd gear, as mines is beat up and the tranny is coming out soon with the engine so I might as well do this then.

Does anything sound wrong with that idea?
Were can I find the best prices on just getting a new oem 3rd gear and evo3 4th'?
And last question, would it make any difference to cryotreat them before installation?
Theres a place to cryotreat them in my city and not too expensive at all.
Realistically, I only need them to reliably hold up to about 500awhp, on a hx35 e85 setup with 4XX ft/lbs of torque...

Thanks.

 

Ok this is what I think I am going to do.

Evo3 4th gear ( I have a 92 tranny so should just drop right in like JackM said.)
and then to save money instead of evo3 3rd, ill just do a fresh OEM 3rd gear, as mines is beat up and the tranny is coming out soon with the engine so I might as well do this then.

Does anything sound wrong with that idea?
Were can I find the best prices on just getting a new oem 3rd gear and evo3 4th'?
And last question, would it make any difference to cryotreat them before installation?
Theres a place to cryotreat them in my city and not too expensive at all.
Realistically, I only need them to reliably hold up to about 500awhp, on a hx35 e85 setup with 4XX ft/lbs of torque...

Thanks.

Since you're trying to save money, you'd be better off spending the money to get the EVO 3rd gear and skip the cryotreating. That way you'll still have a stronger gear, and you'll have a better gear ratio. Close ratio gearboxes are good for racing. I use EVO gears 1-4 on my Talon. I like the ratios very much!

 

Jack has said on here that he is pushing 600hp on his using the evo3 gears and has had to prob.

 

I figured I could get a oem 3rd gear and cryotreat it for cheaper than what a evo3 3rd gear would cost? I mean I'm definitely getting the evo3 4th since our 4th gears are weak and break easily.

 

The intermediate 3rd is also the units final drive gear. They are under a lot of stress and can break if reused in a 500HP car. I would replace it so it will not be a worry. I would also use the EVOIII 3rd. The input cluster EVOIII 3rd has 1 less tooth than the OEM unit and I believe this makes it stronger. It is also double synchro which the OEM unit is not.

Jack

 

Hmm, it will be kind of hard to replace all of that on my current budget because I am also in the process of rebuilding the motor and trying to find a cheapo beater for a daily driver...

I will keep your information in mind. How crucial is the Evo 3rd in your opinion on a 500awhp car? I was hopeing just replacing the oem 3rd with a fresh one would be reliable.

 

Update, did anyone in this thread do evo gears yet?

Well I decided Im not going to do it. Im just going to replace my 3rd/4th gear with a fresh oem new one, and intermidiate shaft if thats really crucial to replace and Ill call it a day. Should be enough for whatever im trying to do with this car...

 

I'm still too poor.. lol.. Hopefully when taxes come back...

 

Yea I decided Im not going to spend more money on evo gears.
Shep told me he doesnt think they are any stronger than the dsm gears, well at least not enough to warrent spending the extra money. Idk , Im not going to get into that.

I was considering just putting new oem 3rd and 4th gears with new syncros if I get any extra money during this engine build.
That should hold fine for my goals of 450awhp on 93 octane, which would likely be a little less than, or right around 400ft/lbs of torque, and my car only weighs 2600lbs so being lighter will help things last longer also...

If anyone else uses the Evo gears with success on a high powered car then that will be great though...

 

You gotta remember that with longer gears, the shock load isn't as hard, whether the gears themselves are stronger, has to also account for that. The main benefit of the EVO 3 gears are the increased rpms for the same mph, keeping you in the powerband better.

 

You do know that the Evo 3 gears are SHORTER than stock gear ratios.

As well, the benefit of a shorter gear ratio would be beneficial for certain applications only -- such as a high-revving 2.0-2.2L setup going over 9000rpms on a large turbo and over 150mph in the 1/4.

The reason I say "certain applications only" depends on your powerband range, goals for the car, etc. In my circumstance, running a large turbo on a 2.3L where my redline is at 8400-8500rpms and running 26" slicks, using the Evo 3 3rd/4th gearset, I would be losing 4 mph in 3rd gear and 5mph in 4th gear. It would essentially require me to rev out to 9000rpm just to get through the traps at 161mph, whereas it would be around 8500rpm with the stock 4th gear ratio. Last time I was able to get down the track with 641AWHP, I was already going through the traps around 8000rpm at 148mph or so. I am expecting 155-160 traps with the new setup very easily (as long as things hold together...).

If I was running a larger diameter slick, or a lower final drive gear ratio than stock (4.929); lets say a 4.4 final drive...I could achieve my goals a bit easier while not having to run as high as an rpm.

It still all comes down to each person's goals....

Personally, I will be sticking with my stock 3rd/4th gear ratios; or change over to a dogbox in the future.

 

The closer the gear ratio the less shock loading they will see when you shift, IMO. I think that is another good reason to run the EVOIII stuff. The HD 3-4 are also very good gears, but I like the closer ratio and double synchros for what I do. Like said above, personal pref is key...

Jack