build your own shift light, or get ripped off by ebay misadvertisement Options

[CilverSeliST205]

http://cgi.ebay.com/ebaymotors/SILVER-BLUE...609165518QQrdZ1

Above link sends you to a product called universal 3a racing shift light, which is not so universal since it needs a aftermarket 3a racing tach to work, but the seller "forgot" to mention it...

anyways, i ended up paying $25 for a aluminium tube with 4 led in it Can not return the product so i got to make it work.. here is how i want to do it:

OEM tach gets an input voltage corresponding to the rpms(please correct me if im wrong) if i run a variable resistor from that input to the base of a transistor that would switch 9V to the LEDs, then I will start the car and set the resistance to the low end and rev the car up i will get enough current to the base of the transistor to switch on the LEDs in shiftlight somewhere in low rpm range... then with increasing resistance i will get the LEDs to go on later in rpm range, and that is how i am going to adjust.

Am i going to make the tach read unaccuratley? Does tach input wire uses voltage as the only reference to rpms? Is this going to work at all? Thanks for reading/responses!

[creis]

^ that link takes me to the forums home page?

well I kinda think of them the same as i do a 7" tach, does nothing more then make your mods list longer, no offence to anyone. but if your thorwing down lots of power I hope your ready to handel it, and not going off a little light.

side note: check out this other auction from the same seller: drift knob Nissan S13/S14 Silvia 240sx Spin Turn Knob

"Hand break do not lock for park unless the spin turn knob is pull" I cant say i turst the seller.

wooooo yeahhh sweet mod

This post has been edited by creis: Feb 3, 2006 - 1:48 AM