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Fantastic Dogbox for RX7

Old 02-15-02, 11:18 PM
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Originally posted by silvr94r2
Things are looking good for me to get the dogbox....getting everything else cleared up on my car and it'll be ready to drop in and go.

This might sound stupid.....but how does this tranny react on the dyno? Will it shift differently because of no load or is that a stupid question?

Twister....you've been really helpful with all our questions....thank-you. I'm glad that you posted this....because now this is one less area to have to always question whether it will last or not.
Hi, on the dyno no different, just better! The gear changes ae actually smoother and the entire box is real quiet once you hit 5th gear because it is a straight throw gearbox, so on a trip it is real real quiet!

You will be real happy when you get the transmission, I have never looked back (except at other cars) !

I just tried the website (guru) and it seems fine, try again.

www.gurumotorsports.com

Last edited by twister; 02-15-02 at 11:32 PM.
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Old 02-15-02, 11:22 PM
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Ok....I got my brain back....I was thinking that you only use the clutch for 1st gear. You can use this tranny as a normal one just stronger and faster shifts....got a little confused there.
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Old 02-15-02, 11:34 PM
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Cool, yes you can use the clutch on every gearchange if you want, and as you say it gives you much stronger as well as a faster shift.
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Old 02-16-02, 04:28 PM
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oh so if you wanted to cruise around town without getting on it then it would be just like stock? and when ever you have it pegged you just slam to te next gear and no clutch or foot off the gas or anything? also do you put this assembly in oyour tranny box that came stock or what? that kinda confused me when you said they ship them without a case.
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Old 02-16-02, 05:31 PM
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Yes you can drive around like stock using the clutch around town, they still sounds sh__ hot! With not lifiting your foot off the accelerator, depends what ECU you are running, in my car you have to just raise your acc foot for split second to stop it over revving, but if you have (say a MOTEC with a sensor on the shifter then that will 'retard' the engine for that split second), my computer (Microtech) that option is coming real soon, so then yes flat changing!!

Yes you put the gear set in the 'stock' case.
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Old 02-16-02, 06:58 PM
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thats cool i have heard that the haltech has a shift feature like that(i have a haltech sitting right next to me in the box). so hoiw muh work is it to take everything stock out of the box and put that in? are there any stock parts that go back in? or is it more of a take it to your local tranny person to do?
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Old 02-16-02, 07:57 PM
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Cool, yes I think the haltech does do that.

It is more work to strip the 'old' one out than it is to reassemble the new one! Also to strip the old one you need some special tools (thanks MAZDA), again a real advantage once the GURu one is in you can strip in real easy without the need for special tools. I have been told to strip a 'stock' and put back together with a GURU gear-set inside is about 4-5 hours.

No stock parts are used so you have no weak points left in the tranny!
I would suggest giving it to your local expert; this is what the do for bead and butter.

www.gurumotorsports.com
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Old 02-16-02, 08:32 PM
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click here this are nice trannys
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Old 02-16-02, 09:02 PM
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can they by chance do 6 speeds?
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Old 02-16-02, 09:19 PM
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Yep they look nice, a pity you have to re-engineer your car to make one fit, not just a straight forward direct bolt in replacement. Great for allout drag racing.
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Old 02-16-02, 09:30 PM
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Originally posted by Node
can they by chance do 6 speeds?
Why?
Would you rather a lower 1st gear or a higher 5th gear or just enjoy changing gears in between?

The new FD 5spd ratios (Guru) have been designed with an overdrive 5th (.87) which will give you an approx top speed at 7,000rpm (dependent upon wheel diameter) of 160+ mph, the rest of the ratios have been designed where the engine will now fall out of the powerband, so for the extra cost of manufacturing a 6spd (which can be done) appears to inappropriate from Guru designers (at the moment).

With more gears, gear size has to be compromised therefore strength & reliability suffer as well.
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Old 02-16-02, 09:41 PM
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can u run a gforce on the street and are they really any better?
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Old 02-17-02, 02:09 AM
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I do not know, from the look of them they look more like a 'pure' drag box rather than a 'swap' over box for street, circuit, drag etc
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Old 02-17-02, 07:39 PM
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I have talked to them before they said you might have to send your bell housing I have a extra I will send them so they can get it on record, some of the fast rotorys in the world are running these like the blue fd 20b aussie car. They said t the h gate is completely streetable, and the push pull style would fall under the rpm match technieck..
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Old 02-18-02, 03:54 AM
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Twister-

I understand that with a dog-mission you have to match revs when upshifting. My question, is the Guru box a standard H pattern and can you or do you have to use the clutch for all shifts? Also can they pretty much do any ratios? I like the ratios of 1st-3rd on my stock tranny but I might want to have 4th altered a bit. But specifically I'd like to have more than a .756 overdrive in 5th. Thanks!
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Old 02-18-02, 06:16 AM
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HI, Yes you do have to match revs (if you want to change without the clutch that is), very easy though with this box being the latest 5 dog tooth profile technology & dog engagement design.

Almost a standard H patten, 1st is back to the left, 2nd is where 1st (standard would be), 3rd where 2nd, 4th where 3rd, 5th where 4th would be. You can use the clutch but you do not have to, just match the gears and 'slap' it through, fantastic.

I think they offer bascially two sets of ratios, one designed for circuit racing (5th being a 1:1), and one designed for street/drag (4th being a 1:1). Drop them a line to discuss, they are very helpful guys re any specific thoughts/needs etc.

Guru is also fully street legal for 'street' class drag cars, as it uses the mazda case, unlike setups like a GFORCE etc.

www.gurumotorsports.com

Last edited by twister; 02-18-02 at 06:20 AM.
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Old 02-18-02, 11:30 AM
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The 6 speed Quaife dog box is available in the US for $6,495.
This is for the FC turbo.
http://www.quaifeamerica.com/gears/rx7.htm

Does anyone have any experince with this box?
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Old 02-18-02, 10:00 PM
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The Gforce transmission can be run on the street with the H pattern shifter. I am getting the GF5R Clutchless tranny. The Gforce 5R is around the same price and will handle up to 1200 hp. They have adapter kits that will mate directly to the Rotary bellhousing. Alot of Rotary Racers in the US
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Old 02-19-02, 02:28 PM
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Originally posted by DELTA_Rotary
So what is it like driving this tranny around on the street? I mean what if you are just out for a spin and arent planning on banging through the gears? I just wonder how smooth it would be if you just out for a spin. It just seem like gear changes would be abrupt and break the tires loose and snap your neck back even when your not at wide open throttle. Could you describe the "experience" for me. I really need to take a ride in a car that has a dogmission to see for myself. They seem like an awesome setup just not practical at all.
Here's a link to a small in car video with sound of a guy with straight cut gears in his 7.

Tranny sound
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Old 02-19-02, 02:44 PM
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Originally posted by West TX RX-7


Here's a link to a small in car video with sound of a guy with straight cut gears in his 7.

Tranny sound
That sounds sooo badass!!! Sounds like a cross between a motorcycle and a jet! I have to go clean my pants out excuse me for a minute......
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Old 02-19-02, 03:50 PM
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OK i got a question that no one has asked yet, OK so in OZ you guys sit on the opposite side of the car. So when we get this trans is the 1st gear on the other side of us when we are on the ledt side of the car?

CJG
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Old 02-19-02, 03:56 PM
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Originally posted by Rotortuner
OK i got a question that no one has asked yet, OK so in OZ you guys sit on the opposite side of the car. So when we get this trans is the 1st gear on the other side of us when we are on the ledt side of the car?

CJG
Trannys are the same shift pattern everywhere. First is in the same spot for them as it is for us.
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Old 02-19-02, 07:20 PM
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That sounds sooo badass!!! Sounds like a cross between a motorcycle and a jet! I have to go clean my pants out excuse me for a minute......
YEAH!!!!!!!!!!!!!!!!!!!!! my god i want that sound so bad. (the turbo is ok to!)
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Old 02-21-02, 04:47 AM
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Originally posted by DELTA_Rotary


That sounds sooo badass!!! Sounds like a cross between a motorcycle and a jet! I have to go clean my pants out excuse me for a minute......
They sure sound great I can tell you! So not only fantastic performance,as I was told last night my car over a lap at Calder (In Australia) is about 2 secongs quicker just due to the gear chnages that only take 35 miliseconds! AND THEY SOUND SEXY!

I tried to link to this video and sound but could not seem to do it, is is still avail?

Again check out the tranny's at this site but also the Torsen diffs, talk about sh__ over any LSD! www.gurumotorsports.com
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Old 02-21-02, 04:52 AM
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Wow, now I want to take a ride in Georges (Exit13B) car even more ha ha.
Is that why motorcycles sound like that? On account of the tranny they use?
I didn't think they had doggy gears.
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