ebay link

please discuss

 

It analyzes the noice on the 12V power supply, probably alternator noice.
It probably works, but I would not use it. I would only trust a shiftlight that get the rpm signal from a real rpm source, like the ignition.

 

I agree to where the source of the signal comes from, but if I were going into that I would probably be lookin' at up grading the ignition and the MSD. set-ups which allows for straight plug in of shift lights (some w/out module so they say), not to mention other programing capacities incl. timing, rev limiter etc. just my .02

 

I think JoBy's explanation is probably how it works but that's probably why the rpm range is adjustable. If it reads the same every time then I don't see why it wouldn't work. You would want to make several "runs" with it to verify that the light is coming on at the same time every time. I guess it would depend on the $$$ factor whether I would try this or use the proven ones.

 

It isn't necessarily the $$$ factor. I wanted a small shift light like a Harlan, but can't find one anywhere... and the tiny one MSD makes needs another 100 worth of accessories in order to work on the vette. I can score a Proform that is good quality and cheap too... but they are rather big and I don't want to drill holes all over my interior to mount it. I figured this would be a nice way to have a shift light that isn't a permenant fixture on the middle of the dash... I just didn't want to buy junk and wasn't sure on the operation of it.

 

Here you go Chris.

http://www.raptorperformance.com/

 

No drilling is good! I also agree w/no permanent install stuff. I also was lookin' at this stuff and was, at some point considering the options by using the MSD. Iam not familiar w/harlan have looked at Pro form and they claim no extras standalone for $49. looks like that may be a good choice (havent seen sizes though). I guess it really depends on if you plan more mods. in the future to make the MSD. one worth while for you. m7

 

Can you not get a Harlan now? I got mine 4 years ago and it took like 4 months to get it. I remember just writing it off because the guy wouldn't answer emails or anything. Then one day it just appeared in my mailbox

Love mine, btw, and did the installation like Hutch on the GSR website:

http://www.grandsportregistry.com/te...ght/index.html

Mike

 

That is a cool setup Hutch has!

 

I went to Harlans site a month ago and it said "site closed as of ____ (whatever date the site went down)" To address the comment from M7, what makes Harlan sought after is the size of them... they are about the size of a pen size highlighter and easy to hide in vents or other inconspicuous places. See the link that STL94LT1. The proform is about the size of a typical flashlight although not as long, but it isn't as easy to put anywhere else but on top of the dash. Thank you STL94LT1 for the link to that... I"m looking into it now!!!

 

 

Raptor Performance looks like they stole their idea from Harlan (or it could be the same light). What was once $29.95 is now $85.

Mike

 

Looks great, and Kwik I saw this also I can see why you like the idea, way cool

 

Back in the old days(early 90's) the only shift light was an autometer. Big and bulky. I installed mine in the defroster duct. Steathy and bright. Has been working perfectly for 13 years. if space and bulkyness is an issue consider hiding it in the duct.