BADHAWK51

iTrader: (1)

I have been thinking about switching gears lately and would like some opinions. Currently the car has 4.10's and goes through the traps at 6100 rpms on motor with a 28inch tire and cuts low 1.4's sixties. The car makes peak power around 6800 and I'm looking to cut some 1.3 motor sixties and improve the et slightly as well.


Do you think I will see any advantages.

SS RRR

iTrader: (2)

www.f-body.org/gears

wrd1972

iTrader: (12)

Seems like a good move for better performance at the strip. Need to be going through the traps much closer to 6800 RPM rather than what you are doing now. Looks like you really know how to launch that car.

BADHAWK51

iTrader: (1)

Thanks.


Thanks man, The suspension is really working on the car and I think by going to strange brakes up front and relocating the battery to the rear I might just see some 1.3's with no other changes.

BADHAWK51

iTrader: (1)

Has anyone else made the switch from 4.10's to 4.56 ? someone has to be running this gear in an auto.

Wicked94Z

iTrader: (26)

13.95 first gear ratio! i think the only thing you're gain is a less consistant 60'. i'm at 11.68 i think with 4.71s.

gregrob

iTrader: (8)

Do you have a dyno sheet?

I doubt you'll gain anything and could possibly hurt your 60

BADHAWK51

iTrader: (1)

Why do you think that ? I have cut 1.46 sixties on 17in drags so I think the suspension is working. Also I thought that I should be closer to my peak power going through the traps.

I don't know how well you can see it but posted what I have.

Wicked94Z

iTrader: (26)

how much converter are you running, and whats the raceweight? sorry if its in your sig im on my phone for the weekend.

Cam95Maro

iTrader: (1)

to help you out he is running a 4000 stall and race weight was 3550

Colin91Z

iTrader: (9)

Jeff have you considered 4.30s? By the time you factor convertor slippage, I'm worried that you might run out of gear on the big-end with 4.56s...

SS RRR

iTrader: (2)

Is that with tire growth taken into consideration?

Colin91Z

iTrader: (9)

When I saw Jeffs car at the LTxshootout, he had radials on it. So unless he's planning to switch to bias-plys, tire growth shouldn't be a factor.

BADHAWK51

iTrader: (1)

Hey Colin, I don't know how accurate this calculator is but it says basically I'm good to 126mph @ 6900 rpms. Also I have considered 4.30's but I don't know if I would be able see a difference but, if I can get my car to cut 1.3's consistantly people are going to have to run me down for the win which won't be easy. I'm also thinking of running a solid roller for next year if funds allow.



RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear
500 3 6 9 13
600 4 7 11 16
700 4 8 13 18
800 5 9 15 21
900 5 10 16 23
1000 6 11 18 26
1100 7 12 20 29
1200 7 14 22 31
1300 8 15 24 34
1400 8 16 26 37
1500 9 17 27 39
1600 10 18 29 42
1700 10 19 31 44
1800 11 20 33 47
1900 11 21 35 50
2000 12 23 37 52
2100 13 24 38 55
2200 13 25 40 57
2300 14 26 42 60
2400 14 27 44 63
2500 15 28 46 65
2600 16 29 47 68
2700 16 30 49 70
2800 17 32 51 73
2900 17 33 53 76
3000 18 34 55 78
3100 19 35 57 81
3200 19 36 58 83
3300 20 37 60 86
3400 20 38 62 89
3500 21 39 64 91
3600 21 41 66 94
3700 22 42 68 97
3800 23 43 69 99
3900 23 44 71 102
4000 24 45 73 104
4100 24 46 75 107
4200 25 47 77 110
4300 26 48 79 112
4400 26 50 80 115
4500 27 51 82 117
4600 27 52 84 120
4700 28 53 86 123
4800 29 54 88 125
4900 29 55 89 128
5000 30 56 91 130
5100 30 57 93 133
5200 31 59 95 136
5300 32 60 97 138
5400 32 61 99 141
5500 33 62 100 143
5600 33 63 102 146
5700 34 64 104 149
5800 35 65 106 151
5900 35 67 108 154
6000 36 68 110 157
6100 36 69 111 159
6200 37 70 113 162
6300 38 71 115 164
6400 38 72 117 167
6500 39 73 119 170
6600 39 74 121 172
6700 40 76 122 175
6800 41 77 124 177
6900 41 78 126 180

Colin91Z

iTrader: (9)

I don't think that calculator accounts for convertor slippage, thats why I was concerned. If you ran bias plys, the tire growth and slippage would likely cancel each other out for the most part. And if you do a SR, you'll likely need to stick with your 4.10s.

Jeez if you go SR and get you 60' in the 1.3s, I'd better step up my game if I wanna compete with you at next years shootout. I don't think my little 350ci SR motor is gonna be able to hang...hmmm, maybe it's time to dust off my spare block and start building that larger ci motor I've been planning

BADHAWK51

iTrader: (1)

Colin, I'm not sure yet if I want to run this class again after all the **** that was said about my car being to fast for the class. I want what's best for the shootout so more people show up but, your going to be running just as fast and so is Alan so I'm torn.

robsquikz28

iTrader: (246)

wtf Jeff, why would your car be to fast for extreme street class?

Colin91Z

iTrader: (9)

Because if you go SR, you'll pick up mph...but because of the PCM your still limited to 7k. So I'm afraid you'll run out of gear on the big end. Keeping in mind that the calculator doesn't account for convertor slippage, you'll likely be trapping in the 125-128mph range which would put you on the limiter before the finish line. Thats why I say you'd likely need to stick with 4.10s. Unless of course you went to an aftermarket PCM...then you could spin it higher and make use of some 4.56s

What fun is it if everyone in the class stays the same speed year after year? The class has gotta progess...

If my car had made it, someone could have complained that I had a solid-roller motor just as easily as they complained about your heads. But once again, both cars were legal according to the rules and the staff.

I say run it, and lets duke it out on the track next year

flyinZ

iTrader: (15)

Might not hurt to post this topic in the "Drag Racing" section too. You may get a little more feedback. Just a thought.

LS1 SPEED

iTrader: (22)

I would try a 4.30 and a bit more converter, but you might need a taller tire as well. The gear as we talked about before is not as important as the converter.