Interest in RSC Crown Wheel & Pinion Kit

[jaymoney]

So the devil inside me has to ask; Have you given any thought to wheel and pinion plus supercharger? I would think that changing the ratio plus adding 140HP would make the Vantage a very nasty beast.

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[AstonAficionado]

Originally Posted by jaymoney

So the devil inside me has to ask; Have you given any thought to wheel and pinion plus supercharger? I would think that changing the ratio plus adding 140HP would make the Vantage a very nasty beast.

Not sure if you're asking me, jaymoney, but I think the gearing change would not be necessary if you went with FI and might even be overkill. This was discussed briefly in Tahoe M3's thread:

Gearing!

Also, it may depend on the type of SC (e.g., screw vs. Roots).

[XJRS Owner]

Originally Posted by AstonAficionado

Is there anyone else interested in changing their final drive ratio? It seems to me that this mod would likely do more to address the lack of low-end torque and its effect on acceleration than many of the other mods discussed on this forum. Am I missing something here? I'm surprised by the apparent lack of interest.

Here's why...

Who is going to install the ring/pinion set for you? Do you have any idea what that's gonna' cost? It'll probably be another $5K on top of the gearset at $6.5K. Ring/pinion install and set up doesn't sound like rocket science, but it is black magic. When the thing starts whineing like a mother you aren't gonna' be too happy. Honestly, I'd much rather bolt something on for more go, than to rip into a diff. This ain't a Chevy (fortunately/unfortunately).

[AstonAficionado]

Originally Posted by XJRS Owner

Here's why...

Who is going to install the ring/pinion set for you? Do you have any idea what that's gonna' cost? It'll probably be another $5K on top of the gearset at $6.5K. Ring/pinion install and set up doesn't sound like rocket science, but it is black magic. When the thing starts whineing like a mother you aren't gonna' be too happy. Honestly, I'd much rather bolt something on for more go, than to rip into a diff. This ain't a Chevy (fortunately/unfortunately).

Wow, I didn't realize this was such major surgery. Assumed it was merely a matter of removing the old gears and replacing them with the new ones. Looks like some investigation as to install is warranted. Thanks for the heads up.

[Stuart@RSC]

Originally Posted by AstonAficionado

Wow, I didn't realize this was such major surgery. Assumed it was merely a matter of removing the old gears and replacing them with the new ones. Looks like some investigation as to install is warranted. Thanks for the heads up.

It isn't a major surgery. You need to replace the Crown Wheel and pinion with the new gears. Any time you do this you have to check your tolerances and shims but it isn't exactly rocket science. The critical aspect of it is the gear cutting and original geometry because the gears will wear very quickly if they don't mesh correctly.

The company which will be making this for us runs a number of GT2 race cars and uses full in-house rapid realisation prototyping facilities. They make a number of components including gearsets for F1 teams so this is comfortably within their engineering capability.

[Stuart@RSC]

Originally Posted by jaymoney

So the devil inside me has to ask; Have you given any thought to wheel and pinion plus supercharger? I would think that changing the ratio plus adding 140HP would make the Vantage a very nasty beast.

The devil inside me is way ahead of you and suggests that anyone who accomplishes both should start buying up Yokohama shares like they're going out of style.

[XJRS Owner]

Originally Posted by AstonAficionado

Wow, I didn't realize this was such major surgery. Assumed it was merely a matter of removing the old gears and replacing them with the new ones. Looks like some investigation as to install is warranted. Thanks for the heads up.

Before you run off half-****ed and buy a set of gears for a whopping $6.5K, you better call your local AM dealer and ask him how much labor for a ring gear/pinion replacement. He should be able to give you a ballpark to drop the entire rear subframe with diff/trans, separate the diff, remove/replace gears, set them up, and then put everything back together. Don't have a heart attack

[Stuart@RSC]

Originally Posted by XJRS Owner

This ain't a Chevy (fortunately/unfortunately).

You're right... it's a Ford.

[Stuart@RSC]

Originally Posted by XJRS Owner

Before you run off half-****ed and buy a set of gears for a whopping $6.5K, you better call your local AM dealer and ask him how much labor for a ring gear/pinion replacement. He should be able to give you a ballpark to drop the entire rear subframe with diff/trans, separate the diff, remove/replace gears, set them up, and then put everything back together. Don't have a heart attack

I'm guessing you'd like to be removed from our mailing list no? Is there anything you don't feel negative about?

[alevine]

I have installed ring and pinion on a few cars and I was always very satisfied with the results. It totally transformed a C5 Corvette I had and made the car a wild beast! I would be interested in this but I don't have the stones to do it on an Aston until I hear feedback from others. I'm sure the results would be awesome on this car too. I like that groups like RSC are exploring ways to further the enjoyment of these beautiful cars.

Adam

[XJRS Owner]

Originally Posted by Stuart@RSC

I'm guessing you'd like to be removed from our mailing list no? Is there anything you don't feel negative about?

Just like to see a little 'full disclosure'. Some people know nothing of a ring/pinion change other than in a Ford or Chevy. If you are gonna' ask for takers on a $6.5K gearset, the least you can do is provide a labor estimate from your nearest AM dealer to make the swap. This is a big job on an AM, don't kid anybody about that. And you can pretty much guarantee that the AM dealer isn't gonna' warranty any of his labor if you don't like the result (like excess gear whine) since they aren't AM approved parts.

Sorry you think this means I am negative about everything. Just being realistic. At least with a bolt on SC the work can be accomplished by a competent custom speed shop (presumably) since you don't have to take part of the drivetrain out.

[AstonAficionado]

Originally Posted by bubba

You could come really close to the actual drive ratios of a 4:11 set by simply installing lower profile (-1 series) tires. It might look a little strange, but it would accelerate exactly the same.

I decided to go with the wheel/pinion set. I installed some 16" wheels on the back for the time being while I wait for the set to be developed. The car is much quicker now, and looks sweet!

[Stuart@RSC]

Originally Posted by XJRS Owner

Just like to see a little 'full disclosure'. Some people know nothing of a ring/pinion change other than in a Ford or Chevy. If you are gonna' ask for takers on a $6.5K gearset, the least you can do is provide a labor estimate from your nearest AM dealer to make the swap. This is a big job on an AM, don't kid anybody about that. And you can pretty much guarantee that the AM dealer isn't gonna' warranty any of his labor if you don't like the result (like excess gear whine) since they aren't AM approved parts.

Sorry you think this means I am negative about everything. Just being realistic. At least with a bolt on SC the work can be accomplished by a competent custom speed shop (presumably) since you don't have to take part of the drivetrain out.

No worries. We don't actually have a product anyway but are trying to respond to customer demand by investigating interest.

[stearnsn]

It would be nice to find out if the rear end was sourced from a Ford or Jaguar part. You can buy Ford racing ring & pinion sets from Ford Racing for under $200.
ie:
http://www.steeda.com/products/ring_pinion_sets.php

I doubt AM wants to share all the secrets with us, or the aftermarket, though. Someone will have to tear one apart.

[SonicKrack]

Originally Posted by AstonAficionado

I decided to go with the wheel/pinion set. I installed some 16" wheels on the back for the time being while I wait for the set to be developed. The car is much quicker now, and looks sweet!

You are a riot man!!!!!