700R4 Transmission expert needed

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Nov 19, 2004 | 02:03 PM

#21

CFI-EFI

Race Director

Joined: Sep 2000

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From: The Top of Utah

Quote:

Originally Posted by #70SM2

Should I just try adding lighter weights first? (Glad I don't do this or a living) I just break cars, I don't fix them!

I have never installed the kit. I just know what controls the shift points. *I* would do the weights first, and see if that doesn't give you what you want. You can fiddle to your hearts content. If you write down the different combinations, it will be easier to go back to something you liked, previously.

RACE ON!!!

Nov 19, 2004 | 09:03 PM

#22

#70SM2

Thread Starter

Racer

Joined: Jul 2004

Posts: 434

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From: Santa Barbara Minnesota

B&M calibration Kit

Quote:

Originally Posted by CFI-EFI

Way Cool, success! we played with the weight & spring combinations, and got the new Raptor shiftin like an F1 car! It's actually quite easy and there are so many combinations. I'm not quite used to the higher stall converter, when I pulled out of Starbucks Some stupid Fe. driver tried to pass me on the right side, in the bike lane, I gave it about 3/4 throttle and went sideways in front of her, and I've got 335 Kumho V700 race tires! Can't wait til Sunday at California Speedway. After 9 years of development, it's finally ready to Rock! Thanks for all the great input!!

Nov 19, 2004 | 09:31 PM

#23

Pete K

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Joined: Feb 2004

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Could you please post the specifics. What does the car shift at now(rpm) and what weights were used to get which rpm. I am about to do this in an f-body and the details would be a big help. Thanks!

Nov 19, 2004 | 09:55 PM

#24

#70SM2

Thread Starter

Racer

Joined: Jul 2004

Posts: 434

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From: Santa Barbara Minnesota

B&M recalibration Kit Tests..

Quote:

Originally Posted by Pete K

Could you please post the specifics. What does the car shift at now(rpm) and what weights were used to get which rpm. I am about to do this in an f-body and the details would be a big help. Thanks!

When I first got the new "Raptor' built tranny it shifted at 3500rpm. wot. They sent me a new Corvette Governor that shifted at 4400.
It had the Purple spring on one side & white on the other and pretty heavy weights. "Purple being the stiffest spring".

Right now it's shifting at 5200 on the money.. thats using the green (med.) spring & #4 weight, middle to light side. We only changed the 1 side of the governor with the purple spring.

Next week I'm going to go 1 step lighter on the weight, since my setup is based upon Torque not hp. Seems to me that each weight and spring change is equal to about 400rpm. Therefore, going 1 weight lighter and no spring change should raise rpm. around 200 to 300rpm. It's actually really cool system. No computer stuff to dribble on & the shift points are reliable

Nov 19, 2004 | 10:13 PM

#25

Pete K

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Joined: Feb 2004

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Thanks for the fast reply! If you change the weights again could you send me (or post ) the results. I am gonna save the info.

Nov 19, 2004 | 10:27 PM

#26

#70SM2

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Racer

Joined: Jul 2004

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From: Santa Barbara Minnesota

Quote:

Originally Posted by Pete K

Thanks for the fast reply! If you change the weights again could you send me (or post ) the results. I am gonna save the info.

One thing that you may need to take into consideration is your gear ratio/ I currently have 3:73, it may be different with other ratio's.

Nov 20, 2004 | 08:47 PM

#27

comp

Team Owner

Joined: Sep 2003

Posts: 88,393

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From: eville in

it should make much difference,, you want it to shift at sertain RPM's dont you ????? or is it MPH you want ???

Nov 21, 2004 | 12:43 AM

#28

#70SM2

Thread Starter

Racer

Joined: Jul 2004

Posts: 434

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From: Santa Barbara Minnesota

Governor recalibration

Quote:

Originally Posted by #70SM2

One thing that you may need to take into consideration is your gear ratio/ I currently have 3:73, it may be different with other ratio's.

The reason I mentioned the gear ratio is, the stock Corvette governor should shift at 5200rpm .. right? but mine didn't .. in a conversation with the Summit tech. guys they mentioned that things might be different with lower gear ratio's. Yes, I want it to shift at certain rpm. really has nothing to do with mph. I'm not really sure why the rear end ratio would have an effect on the shift points? anyone experts out there?