severancej Posted September 28, 2022 Report Share Posted September 28, 2022 Has anyone ever had or know anything about an Fi BL18 with a 4 inch coil? Has 5 layer spider and what looks to be a flatwind coil 3 days ago I bought this one for 20 dollars! and am looking to recone it. But fi only has stock recones which should be 3 inch. Yesterday I impulse bought a recone for a BL 18 v2 d2 lol Then I cut the sub open and got to looking more and realized wtf I have a 4 inch coil! So I got with Fi, and they are helping me. But so far they have only said it's a rare sub. 98' dodge ram 140A alt Big 3 XS D2700 JVC kd-r310 Rockford T500-1BDCP 2 Sundown E12 Ported 4cubes 35hz Rockford P400-4 2 Infinity reference 3way 6x9 2 Polk DB 5 1/4 2x layer dynamat all doors Link to comment Share on other sites More sharing options...
jmanjr82 Posted September 28, 2022 Report Share Posted September 28, 2022 Sweet, looking good already. What kind of paint did you use? Never heard of a BL with a 4in coil so very interesting! Link to comment Share on other sites More sharing options...
severancej Posted September 28, 2022 Author Report Share Posted September 28, 2022 Thank you! I am super stoked to revive this thing, the guy here had it in a plywood box and the condition of it speaks volumes to the amount of care shown to this BAMF. They literally had no idea what they had. The paint is rustoleum gloss protective enamel. I thought it was to much orange so I polished it instead. 98' dodge ram 140A alt Big 3 XS D2700 JVC kd-r310 Rockford T500-1BDCP 2 Sundown E12 Ported 4cubes 35hz Rockford P400-4 2 Infinity reference 3way 6x9 2 Polk DB 5 1/4 2x layer dynamat all doors Link to comment Share on other sites More sharing options...
jmanjr82 Posted September 28, 2022 Report Share Posted September 28, 2022 Looks good brother. I was going to ask about the force of that motor after seeing its condition. Might be worth getting it magnetized Link to comment Share on other sites More sharing options...
Kyblack76 Posted September 29, 2022 Report Share Posted September 29, 2022 I loved the old BL's, and the UFO's. I remember Scott having a option for a 4" coil for the OG BL. That is pretty rad you found one in the wild, and REAL rad, you are putting it to use. Makes me wonder if a SP4 recone kit would fit in it. May be to tall, but, it may work great. If anything, call Fi, talk to Atwell (Scott) or someone over there, and at least tell them what you have, and what could be done with it these days. And when you do, write everything down, and come back here, and post what was talked about. Id love to hear that. Best of luck. What a fun find. SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
severancej Posted September 30, 2022 Author Report Share Posted September 30, 2022 Hell yeah thank you KB I've seen you here forever. I went on Fb bassheads on budget but didn't know who to trust for a recone so i impulse went to Fi website and bought a recone for a BL and within like 6 hours I realized that coil wasn't no 3 inch and got to looking and thought oh shit 😆 I have to get with them immediately. I tried to call Fi just cause id rather do that but the number didn't work. I got them on FB messenger immediately. Idk who I got on the other end but they asked for my order# and pics and said "it is a BL with a 4inch coil very rare sub" I told them I'm on standby if they need any measurements or anything but no word yet. I Def don't want to bother them so I'm just on standby to wait my turn. 98' dodge ram 140A alt Big 3 XS D2700 JVC kd-r310 Rockford T500-1BDCP 2 Sundown E12 Ported 4cubes 35hz Rockford P400-4 2 Infinity reference 3way 6x9 2 Polk DB 5 1/4 2x layer dynamat all doors Link to comment Share on other sites More sharing options...
severancej Posted January 13, 2023 Author Report Share Posted January 13, 2023 I got my Fi custom 4inch BL18 recone kit in and installed!!! The new coil looks so much better than the old. The old coil was hanging way out of the top of the motor gap at rest. The new one is centered nicely in the motor. The spider pack looks awesome! My first time using CA glue sucked but hey got to start somewhere. ***Looking for input here or advice on how to push this thing to the limits. Strictly basslines centered around 30 hz I have no TS parameters yall but hypothetically... Imagine this style enclosure In a suburban with the sub facing up and port along bottom facing towards rear hatch is what I think I'm going to do. Attached is a rough draft of my idea. Obviously I'll double baffle but otherwise does the port area and stuff look good? 98' dodge ram 140A alt Big 3 XS D2700 JVC kd-r310 Rockford T500-1BDCP 2 Sundown E12 Ported 4cubes 35hz Rockford P400-4 2 Infinity reference 3way 6x9 2 Polk DB 5 1/4 2x layer dynamat all doors Link to comment Share on other sites More sharing options...
severancej Posted January 13, 2023 Author Report Share Posted January 13, 2023 Fi had this cutsheet for the stock BL18. A lot of cut sheets are available for the old drivers on the SSA forum under the Fi section! I pretty much just used this design and tweaked the layout for sub up port back and to only use 1 common wall for the port. Thoughts? The reason I used 7.0 cubes instead of 7.6 is because I'm going to invert my driver 98' dodge ram 140A alt Big 3 XS D2700 JVC kd-r310 Rockford T500-1BDCP 2 Sundown E12 Ported 4cubes 35hz Rockford P400-4 2 Infinity reference 3way 6x9 2 Polk DB 5 1/4 2x layer dynamat all doors Link to comment Share on other sites More sharing options...
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