stevenoz

iTrader: (27)

Who sells these besides rx7.com and are they any cheaper than $770!!!!!!! Thats absurd!

user 84205

Stevenoz,
Actually thats not a bad price. It just depends on what company and quality of the gears are. I think M2 and RX7 store have them too, but im not for sure on that.. Here are their web pages..

www.m2performance.com

www.rx7store.net

Hope that helps
Jason
www.jt-imports.com

jspecracer7

So Dragon calls me up about a week ago and tell me that he picked up a 4.777 final gear for his FD...and I'm thinking this guy just spent $700.00...and he says it's new...so I ask how much....



...Y20,000....which Canman6969 knows that's cheap as HELL!!!

...or for you stateside people's...less than $200.00...

and he won't even sell it to me!!!

stevenoz

iTrader: (27)

Actually that is ridiculous! Look at what the mustang guys pay for theirs...$160. Now I know we can expect to pay more because of the less demand but jeez 5 times the amount??? These people are not just out to make a living on us, their freakin' trying to rape us. Thats sad!

user 84205

JPEC holly ballz that is cheap. I think $450 was the best I have seen for any new gears.... DAMN!

Stevenoz-- You go to think about it, that is an american car in america. Your talking about a car thats not sold anymore anywhere in the world, and went for more then the mustang in the first place. Its a bummer I would agree with you...

Dragon

Yea I got it for $165.28 at the current yen rate brand new from a used parts store... : D every now and then I find a deal before people like JSpecRacer7 come across them or steal them out from under me...

jimlab

Canman6969, the high cost of parts doesn't really have much to do with the purchase price of the car, it has far more to do with the production numbers. If 3rd gen. RX-7s were as plentiful as Mustangs, for example, the cost of both OEM and aftermarket parts would be much lower.

For example, if I make a 3.73:1 ring and pinion set for the Ford 9" differential, I can be fairly sure of selling large numbers of them because not only are there thousands of Mustangs and other Ford cars which came with 9" differentials, but there are also now literally thousands of Camaros and other cars that have been "converted". It's the differential of choice for "budget" drag racers, therefore there's a huge market for ring and pinion sets. I can make them in very large quantities at very low individual cost, and still make the profit margin I require. Not only that, but the size of the market can support several vendors who sell pretty much the same thing, which means to remain competitive, I have to keep my prices low.

Now when you're talking about the 3rd gen. RX-7, the pool of potential customers is much, much smaller, especially since quite a few of them are now scrap metal, and only a certain portion of the ownership pool is willing to or needs to modify their cars with certain parts, like ring and pinion gears. Therefore the same manufacturer couldn't afford to make gear sets in large quantities. If they did, they'd run the risk of getting stuck with the excess inventory, and still have to charge more to make up the manufacturing and material costs. So production volume is not only necessarily lower, and prices therefore higher, but in cases like this, there's not enough potential market to support multiple vendors of the same essential part, so there's no competition. Be the only one on the block with the part people need and you can charge pretty much whatever you want, within reason.

Bottom line, there's no money in tooling up to make only a thousand sets of something when it costs you the equivalent of five thousand sets (just an example) to produce that thousand. But if there was demand for twenty thousand sets, then the cost of the tooling is justified by the resulting sales. That's why there are Energy Suspension urethane bushings for Mustangs and Civics and even 2nd gen. RX-7s, but none for the 3rd gen. See what I mean? So if there's next to no demand, you make them one at a time by hand, or just a few sets at a time, and the cost is much, much higher both for the manufacturer and the customer.

GoRacer

iTrader: (2)

That's supposed to be the stock size on the RZ. So shouldn't that be cheaper now through Mazdacomp?

BATMAN

I checked with my Mechanic and he told me that these are probably The MPV rear gears.

A good lead to check into.

MazdaMike

im not to sure how the ratio's work but 4.77 that means the gears are longer or shorter

Dragon

less top end, but it will closen the shift points and hopfully keep you in the power band better giving you a faster 1/4 mile run if you got good tires

3rdGen7

I have a friend here (in Trinidad) who circuit races a perry-ported n/a FD and he is looking for something taller than 4.77

He is presently running a 4.77 and he keeps hitting the rev limiter on the track going on to the straight.

Can you guys suggest something for him ?

We have been looking everywhere.. mostly in Japan for something taller like a 5.? but even Knights Sports who sold him the 4.77 told him that they donīt have anything taller or know anyone who has.

Any suggestions ???

... Jim lab master of the "makeshift"
(no pun intended) ???

Sure ainīt anything like you guys have up there in the US of A he he

Here is write up the guys did on the car my friend is running here -->

http://www.trinispeed.com/gallery/rx7_rs/ravi_singh.htm

and

http://www.trinispeed.com/gallery/rx...vi_singh_2.htm

PICS of the Car:- Yes itīs a right hand drive :-) ..JDM FD.

http://www.trinispeed.com/gallery/rx7_rs/Mvc-008f.jpg

http://www.trinispeed.com/gallery/rx7_rs/Mvc-0066.jpg

http://www.trinispeed.com/gallery/rx7_rs/Mvc-013f.jpg

http://www.trinituner.com/gallery/20.../4MVC-002F.jpg

http://www.trinituner.com/gallery/20...2/MVC-001F.jpg

http://www.trinituner.com/gallery/20.../6MVC-008F.jpg

http://www.trinituner.com/gallery/20.../6MVC-010F.jpg

Old School Rotars -
http://www.trinituner.com/gallery/20.../6MVC-007F.jpg

http://www.trinituner.com/gallery/20.../5MVC-006F.jpg

Rotor13B

Umm, wouldn't you want to go down, not up in gears?

jspecracer7

4.77 is shorter gearing, not taller gearing. He needs to go down to get taller gears i.e. 4.33333 final gear.

Node

iTrader: (1)

or if he has a nice paying job (very nicely paying) he could get a 6 speed lol
can you say...straightcut gears

3rdGen7

maybe i should re-take gearing 101 ...again.

jimlab

jspecracer7 is correct, numerically smaller gear ratios (2.73, 3.23, 3.42, etc.) are "taller", and numerically higher gear ratios (4.10, 4.33, 4.77, etc.) are "shorter", the opposite of what you might expect. An easy way to remember that is this; the higher the ratio, the shorter the time you'll spend in each gear.

The optimum differential gear for maximum acceleration in a given range can be found by analyzing the gear ratios of the transmission and the power band of the engine in question. Whether that range is 0-60 mph, one quarter mile, or the back straight at your local track, you can find the right gear to maximize acceleration.

That said, I haven't heard of anyone with a higher gear set than 4.77 available, and 3.90 (OEM automatic) seems to be the lowest. I have heard a rumor that there was a 4.50 gear set available for the 3rd gen., and there are 4.33s readily available, but nothing in the 5.xx range, to my knowledge.

I'm currently looking into having a custom ring and pinion (2.80) cut for my car at the moment, so there is always that option.

Dragon

I've seen a 5.1 for sale somplace... can't remember where though... it's been a while, but it was in Japan..