Optics

I'm building a high RPM NA S5 engine right now and my engine builder has advised the redline will be 9,750... I've got an S4 interior with the S4 gauge cluster and want to keep the interior as OEM as possible. Redline is currently 7k on the cluster, and it indicates up to 8k.

I popped the cluster out thinking I could get a close color matched aftermarket gauge and cut it in place of the OE unit, but the PCB board at the back of the cluster is going to make that nearly impossible. Has anyone seen this done?

Alternatively if there is some way to modify the signal going to the OEM tach to have it read 2,000 RPM lower than it is across the entire rev range? If that's the case I could have a graphics company whip me up a new cover decal for it. Any other suggestions for a good visibility tach in the car that won't be too obnoxious?

pontiackid

iTrader: (3)

The FEED, Re-Amemiya, Knight Sports and MazdaSpeed gauge clusters all feature a 10k tach.

The OEM cluster (and most tachs) use a simple resistor to control the tach's output. Changing the resistor will allow to you adjust your display but, your going to have to get an aftermarket tach gauge to use as a comparison to know what resistance you'll need though, and a lot of trial and error. Companies like Top Fuel make thin gauge overlays that will suit your needs if you choose to go that route.

Optics

I see a few pictures of the RE, Mazdaspeed, and Knight clusters but can't find anywhere to purchase them... know of any vendors still dealing with these? That looks like exactly the solution I'm after.

p0tat0s

iTrader: (3)

try yahoo japan auctions with a freight forwarding service like bidjdm, from japan, remambo, etc. I see some pop up on ebay as well

Optics

Managed to buy a RE one on ebay... It wasn't cheap though, $800 USD ouch! Should look more or less stock though, thank's for the suggestion!