Mazda Rotary Club

General => General Technical => I. C. E. & Electrical => Topic started by: TiddlesRX7 on January 15, 2010, 09:15:13 PM

Title: What FC headlight bulbs to buy?
Post by: TiddlesRX7 on January 15, 2010, 09:15:13 PM
So Ive heard good reports about Halfrauds all weather bulbs from a few peeps but really I have no idea whats best. So sugestions please.
Also can you fit H4\'s to the FC without HID\'s?
Sorry to sound like a newbe!
Title: What FC headlight bulbs to buy?
Post by: TiddlesRX7 on January 15, 2010, 09:19:10 PM
What about these?
http://cgi.ebay.co.uk/Xenon-Main-Dip-Beam-Bulbs-H4-MAZDA-RX7-FC-1985-92_W0QQitemZ140346631553QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item20ad4fa581
Title: What FC headlight bulbs to buy?
Post by: Prof on January 15, 2010, 09:25:54 PM
H4 is the normal fitment unless you have the sealed lens things like Liam had - although the connector is the same.
 
I used the Halfords all weather\'s before going to HID\'s - they were the best by far based on cost and the light output they gave.
Title: What FC headlight bulbs to buy?
Post by: TiddlesRX7 on January 15, 2010, 10:13:02 PM
Cool I thought as much. I\'ve just ordered a set of the ebay ones above so I\'ll see how they go. I was just concerned about melting wires as I\'d read somewhere about it being a problem.
Title: What FC headlight bulbs to buy?
Post by: Prof on January 15, 2010, 10:43:52 PM
You have to be careful with some of those \'bluey\' bulbs - some of them are 90W or even 100W and at that wattage are nearly twice the current consumption - hence the melty wires.
 
Ironically - HID\'s use about 35W per bulb - which is less but they give out 2 to 3 times the light !
 
You should be fine with them - as long as they aren\'t too blue. :cool
Title: What FC headlight bulbs to buy?
Post by: m1tch on January 15, 2010, 11:01:06 PM
The bulbs on ebay there are listed as brilliant white 5000k, so they should be ok :)
Title: What FC headlight bulbs to buy?
Post by: lead_foot on January 16, 2010, 10:04:17 AM
i\'ve just put my old h4 hid 6000k kit into my fc , and makes so much difference compared with the original candle powered bulbs lol
Title: What FC headlight bulbs to buy?
Post by: TiddlesRX7 on January 16, 2010, 10:19:23 AM
Yeah L1am\'s got some HID\'s for sale and I\'d like to buy them but I\'m still a bit broke after Christmas. I will get some eventually unless I can sort a deal out with L1am.
Title: What FC headlight bulbs to buy?
Post by: TiddlesRX7 on January 20, 2010, 10:29:10 PM
Well I got the ebay bulbs in the other day and I must say, they arn\'t really any better than what was in before. Maybe slightly better at a push. They are however quite a shade whiter than the previous bulbs. I\'ll know better after a decent late night drive. I did however find that one of my bulbs that was in was a 130W bulb!
Title: What FC headlight bulbs to buy?
Post by: m1tch on January 20, 2010, 10:45:05 PM
Quote from: TiddlesRX7;666747Well I got the ebay bulbs in the other day and I must say, they arn\'t really any better than what was in before. Maybe slightly better at a push. They are however quite a shade whiter than the previous bulbs. I\'ll know better after a decent late night drive. I did however find that one of my bulbs that was in was a 130W bulb!

Get either HIDs or Halfords all weather bulbs :)
Title: What FC headlight bulbs to buy?
Post by: L18M on January 20, 2010, 10:56:35 PM
for the price of the egay ones and halfords one, your over 1/2 way to getting a hid kit lol
Title: What FC headlight bulbs to buy?
Post by: grinder on January 21, 2010, 09:54:45 AM
or get down to the £1 shop and pay £1 each for H4 ( and sometimes they have the blue tint ones )
Title: What FC headlight bulbs to buy?
Post by: m1tch on January 21, 2010, 09:56:41 AM
Quote from: grinder;666796or get down to the £1 shop and pay £1 each for H4 ( and sometimes they have the blue tint ones )

Thats Grinder price :rollin
Title: What FC headlight bulbs to buy?
Post by: grinder on January 21, 2010, 09:57:59 AM
ohh yes , occasionally they stock the H7\'s which i used in the rover .. they were £8 each in halfrauds - so used to buy them from there

so are we saying that the H4\'s fit fine in the FC with no mods ?
Title: What FC headlight bulbs to buy?
Post by: L18M on January 21, 2010, 01:12:54 PM
Quote from: grinder;666800so are we saying that the H4\'s fit fine in the FC with no mods ?

:Hammer what bulbs does your fc use?? :confused::xconfused
Title: What FC headlight bulbs to buy?
Post by: grinder on January 21, 2010, 01:13:51 PM
dunno - never looked :D
Title: What FC headlight bulbs to buy?
Post by: m1tch on January 21, 2010, 02:08:24 PM
Its a H4, I have just changed my driver side bulb over :) if you are getting HIDs you need to make sure they are motorised and are ment for reflector headlights as the \'normal\' HIDs are for projector headlights only due to the beam pattern. Plus you need to make sure that the motorised HIDs fit ok behind the popup covers, some of them don\'t as they are too big.
Title: What FC headlight bulbs to buy?
Post by: L18M on January 21, 2010, 02:25:01 PM
theres loads of space behind the pop-up cover for hid\'s. i even fitted my ballasts under the pop-ups with enough space for the headlights to close :p actually iirc there\'s enough space to fit on the side of the car so when the lights are down the ballast sits next to the light. though maybe different for ukdm fc\'s.
Title: What FC headlight bulbs to buy?
Post by: Prof on January 21, 2010, 03:00:44 PM
Quote from: L18M;666863theres loads of space behind the pop-up cover for hid\'s. i even fitted my ballasts under the pop-ups with enough space for the headlights to close :p actually iirc there\'s enough space to fit on the side of the car so when the lights are down the ballast sits next to the light. though maybe different for ukdm fc\'s.

Mitch is referring to the space between the back of the bulb and the bulkhead metal. There isn\'t much space and I had to shop around for motorised HID\'s that didn\'t protrude too far backward.
 
This problem occurs because the headlights in an FC stay upright when they go down due to a unique parallelogram hinge mechanism (so they can flash through the FTP lens)
 
It might be different on JDM cars - but the US and European models have this problem.
 
The problems with converting to HID\'s:
 
1) You need to provide Hi/Lo beam function. From an electrical point of view this can be done 3 ways:
 
a) Use 2 HID bulbs - one for Hi one for Lo (with dual ballasts)
b) Use 1 HID and 1 ordinary bulbs (it could work with either HID=LO or HID=Hi)
c) Use 1 bulb, and a motorised bulb or light guide to change the beam pattern.
 
2) In the UK, the car must pass an MOT - so the beam patterns must comply with the regulations. If you use the stock lens - the only way to do this with an H4 HID is to use the motorised one - the dual bulb offerings have one bulb off centre so the beam pattern is wrong. Also, the centre bulb is normally not shrouded at it\'s top end also causing the beam pattern to be wrong. Trust me on this - I tried 3 times to get through the MOT before getting it right.
 
These images might illustrate the problem:
 
The shrouded HID:
 
(http://www.china-hid-lights.com/productpic/pb_uz4b1212049538.jpg)
 
The Hi/Lo dual bulb arrangement (Hi beam is halogen bulb):
 
(http://www.xenonlink.com/images/h4hbulb.jpg)
 
Note: These will fail an MOT on beam pattern
 
Dual HID bulb:
 
(http://www.aape.biz/File/Product/B4029.jpg)
 
Note: These will probably fail MOT because the top of the HID is not shrouded and light bleaches out causing an irregular beam pattern. Look at any standard H4 bulb and you\'ll see it has a cap on the top to prevent direct light.
 
You can see that the back of the motorised bulb goes back a lot further than a stock H4 or the other HID offerings.
 
The other option is to install dual lens fittings - and have one for Lo Beam and one for Hi. The MR2 kits are likely candidates if you want to go down that route - but may take some modification to get it to fit.
 
3) For UK cars, you need to eliminate the DIP-DIM circuit entirely - with a HID ballast - it must either be on or off - you can\'t run it through a resistor to drop the intensity. (Unplug the DIP-DIM resistor under the airbox and the internal DIP-DIM relay behind the glovebox is all that\'s needed)
Title: What FC headlight bulbs to buy?
Post by: L18M on January 21, 2010, 03:17:31 PM
good read! i think jdm is slightly different then as theres no FTP.
all the HID\'s i\'ve seen protrude the same amount (just my experience).
didnt know about the dip-dim, i dont think jdm had it (but then my fc is the second most basic model with a lack of luxuries and optional equip lol)
Title: What FC headlight bulbs to buy?
Post by: turbointhebrain on January 21, 2010, 07:38:09 PM
Good read lads, lovin the info!