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

[CilverSeliST205]

^ 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

Yea my link doesnt work but click on the link that 97lestyousay posted earlier and you will understand the advantage of a shift light, tach is different coz you can not tell where in rpm band you are without looking at it, shift light is like !FLASH! in the corner of your eye telling you that you got 0.0002 second to shift before you redline it, either way if its adjustable per gear then ill bet you any money that you will not get nearly as close to perfect shifting in WOT in a curvy road without a shift light, as you would with a shift light