Custom rear diffuser anybody???

[sr20drifter1]

Hey guys. I'm trying to see if there is anybody in Socal that would like to buy a custom rear diffuser. mmdb, a zilvia member, is the guy that will be making it. This is not a commercial sale. It's just that I would like him to make one for me, but he doesn't know anybody that has a s13 hatchback in his area. So if you're in Socal and you are very interested in getting a custom rear diffuser, please get in touch with mmdb or me.
Here is the picture that got me started:
http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash4/422268_336907903018009_231163783592422_1085828_336 669113_n.jpg (http://api.viglink.com/api/click?format=go&drKey=325&loc=http%3A%2F%2Fzilvia.net%2Ff%2Fwheels-tires%2F439226-rare-nismo-lmgt4-18x9-5-12-18x10-5-15-5x114-3-white.html%23post4557681&v=1&libid=1331074538526&out=http%3A%2F%2Fa7.sphotos.ak.fbcdn.net%2Fhphotos-ak-ash4%2F422268_336907903018009_231163783592422_1085 828_336669113_n.jpg&ref=http%3A%2F%2Fzilvia.net%2Ff%2Fsearch.php%3Fsea rchid%3D10379312&title=CA%20RARE%20Nismo%20LMGT4%20%7C%2018x9.5%20% 2B12%20%7C%2018x10.5%20%2B15%20%7C%205x114.3%20%7C %20White%20-%20Zilvia.net%20Forums%20%7C%20Nissan%20240SX%20(S ilvia)%20and%20Z%20(Fairlady)%20Car%20Forum&txt=&jsonp=vglnk_jsonp_13310745698811)


This is mmdb's old car with his custom rear diffuser.
http://i7.photobucket.com/albums/y259/mmdb/photo-477.jpg (http://api.viglink.com/api/click?format=go&drKey=325&loc=http%3A%2F%2Fzilvia.net%2Ff%2Fprivate.php%3Fdo %3Dshowpm%26pmid%3D6597755&v=1&libid=1331074898243&out=http%3A%2F%2Fi7.photobucket.com%2Falbums%2Fy25 9%2Fmmdb%2Fphoto-477.jpg&ref=http%3A%2F%2Fzilvia.net%2Ff%2Fprivate.php&title=Zilvia.net%20Forums%20%7C%20Nissan%20240SX%2 0(Silvia)%20and%20Z%20(Fairlady)%20Car%20Forum%20-%20Re%3A%20Diffuser&txt=&jsonp=vglnk_jsonp_13310749068801)

When it was removed from his car before he sold it.
http://i197.photobucket.com/albums/aa291/sr20drifter1/1307761334.jpg

I'm at work right now. Please mod move the thread if it does not belong in this here.
Thanks.

[hardest240owner]

im down wheres he at?

[godrifttoday]

What type wing on that black s14

[sidewayz240]

Wow, looks fantasic on that S14. Subtle but effective.

[HAWAII]

I want to get one also, I have an S13 hatch. Let me know, located in Los Angeles, CA

[future]

I have a coupe. Let me know if he can do that one

[ManoNegra]

What type wing on that black s14

Never fails, every time a picture of Jimi's old car shows up this question is asked.

jdm kouki wing with custom m3 gurney flap.

[godrifttoday]

Never fails, every time a picture of Jimi's old car shows up this question is asked.

jdm kouki wing with custom m3 gurney flap.

thank u, me love u long time

[mmdb]

Hey sr20drifter1 thanks for starting this thread! I've been asked to make a few diffusers months and months ago, but I never had time since I was working. Now that I'm laid off, aka living the American dream, I have time to make a few.

I have a template (thanks manonegra) to make an s14 rear diffuser, I don't have an s13 to mock up a set. If anyone has a car I could use to make a diffuser contact me!

im down wheres he at?

Located in Fountain Valley, Orange County, 92708 area.


Never fails, every time a picture of Jimi's old car shows up this question is asked.

jdm kouki wing with custom m3 gurney flap.

Hey! I think you're car is going to look like mine when you're done with it (if ever ;) ). I miss going to the track and tinkering on the car. The surf isn't good everyday and I need things to do. Starcraft 2 is getting boring! I'll probably come by next week to get measurements for the tower240's s13. Fun! Btw pick up your damn hood!

[blueshark123]

Pm me a price I have a s14 jdm rear w/valances if it matters. I remember asking you to make me one a long time ago

[mmdb]

Pm me a price I have a s14 jdm rear w/valances if it matters. I remember asking you to make me one a long time ago

PM sent. I've been out of the 240 scene for a while so sorry I didn't get back to you.

[sickstatus]

Pm me a price I have a s14 jdm rear w/valances if it matters. I remember asking you to make me one a long time ago

I second this, please pm me.

[fyneyoungstunna]

wanna do some for two other cars? 300zx and an s12?

[ryandriftingfat]

Located in Fountain Valley, Orange County, 92708 area.

You can use my car, I'd be down. S13 hatch, located a couple blocks from FV.

[ManoNegra]

I don't have an s13 to mock up a set. If anyone has a car I could use to make a diffuser contact me!

dude, you know Mike's gray hatch is just sitting at the shop.
And Robert's hatch is here all the time as well





Hey! I think you're car is going to look like mine when you're done with it (if ever ;) ). I miss going to the track and tinkering on the car. The surf isn't good everyday and I need things to do. Starcraft 2 is getting boring! I'll probably come by next week to get measurements for the tower240's s13. Fun! Btw pick up your damn hood!

yeah, keep putting off picking up the hood
but lay off, you said you'd be done with the bumper and valences in a couple of weeks... that was months ago... :blah:

boring adult life gets in the way of tinkering with the car
I'm actually going to try to get the black car ready for Buttonwillow this March
let me know when you plan to stop by

[brizzle3000]

How much for the s14 one

[godrifttoday]

U can do it in my garage ... 4 car garage and plenty of work space pm me

[mmdb]

wanna do some for two other cars? 300zx and an s12?

Sure, but the difficulty is finding an s12! I'm sure someone here in OC has a 300zx that wants one. Btw, does your car have an aftermarket bumper? If so I need that particular one you're using. Otherwise, an option is for you to send me a template of the rear bumper outline and I can get one made for you that way.


You can use my car, I'd be down. S13 hatch, located a couple blocks from FV.

I'll keep in touch! Btw, what bumper are you using now? Each diffuser has a different outline depending on the type of bumper made. I make them to fit a particular car, and I don't like the "universal" diffusers out there. Looks extremely BAD!


dude, you know Mike's gray hatch is just sitting at the shop.
And Robert's hatch is here all the time as well

Ahh! He has an aftermarket rear bumper though? Well I'll come by next week to take some measurements and see how to effectively mount it.


yeah, keep putting off picking up the hood
but lay off, you said you'd be done with the bumper and valences in a couple of weeks... that was months ago... :blah:

boring adult life gets in the way of tinkering with the car
I'm actually going to try to get the black car ready for Buttonwillow this March
let me know when you plan to stop by

Yeah I'm such a slacker sometimes! Sorry :( Surfing, girlfriend, surfing... surfing. I'll return your bumper 'n valances soon. I need to make a template :X I'll get you some hummus house! I'll be over next week and say hello to the tower crew. Can't wait till you get the car running. That'll be exciting! I'm sure you'll be blown away with the knuckles 'n coilovers.


How much for the s14 one

I'm constantly looking for better solutions to build the diffuser and since I'm new to making them for other people, it's hard for me to say at the moment. But expect something reasonable. I'm not doing this as a formal way of income, just doing it for fun :D And since the economy sucks, and I know how cars can be addicting I'm willing to work with ya'll. Let's keep cars fun! Besides, it'd be nice to see more 240s at the track.


U can do it in my garage ... 4 car garage and plenty of work space pm me

I'll PM you

[ryandriftingfat]

I'll keep in touch! Btw, what bumper are you using now? Each diffuser has a different outline depending on the type of bumper made. I make them to fit a particular car, and I don't like the "universal" diffusers out there. Looks extremely BAD!

Stock. Exhaust cutout slightly to fit blast pipes.

EDIT: I don't necessarily want a diffuser, especially on stock aero. Just offering you a car to use for fitment since I'm close. I'd like to see how it looks on stock aero, but I doubt it'd be good. I'd just hit you up whenever I did aero.

[mmdb]

Stock. Exhaust cutout slightly to fit blast pipes.

EDIT: I don't necessarily want a diffuser, especially on stock aero. Just offering you a car to use for fitment since I'm close. I'd like to see how it looks on stock aero, but I doubt it'd be good. I'd just hit you up whenever I did aero.

Oh ok thanks and good to know. I have someone interested in the aero, but we'll definitely keep in touch.

[Sidewayz silvia]

I've been looking for a rear diffuser for a while.... I'm totally in...

[fyneyoungstunna]

we have a lot of Cali guys with s12's. My s12 is actually in Carlsbad right now.
we got a few in La, and others sprinkled all throught Cali.

pm me what you think a price per diffuser would be for the s12 and I can get you well on your way. Even if others don't want one, if the price is right I'll take one or two.

[mmdb]

Ok got a hold of some suppliers to send me some of their material to put together a few diffusers. I'll start out with an s14 kouki jdm and get that squared then move onto a s13 (user here is sending me valances to mock one up and have 'em made), then I can move onto the s12 depending on the demand. I'll post up finished products. LMK you're requests in the meanwhile or what you'd like to see.

[Sidewayz silvia]

You have my pm's... the s14 JDM rear bumper is what I want... thanks again

[mmdb]

Welp found my supplier(s) and got the design down. All you need to do is install it (that's where your creativity comes in). The only one available now is the s14 kouki with jdm rear valances.

As far as differences go the new improved diffusers uses:
- DiBond for the base (Aluminum Composite Material and super strong)
- Strakes size has increased and runs width of the base
- Better designed brackets

The material used it strong as heck. It probably won't withstand a straight on rear impact over 60mph, but there isn't any problem with it surviving multiple track days. I've used mine for over 2-3 years without any issues. Anyway, fun fun. LMK if you want one made. Lead time is 1-2 weeks.

Next, I'll be working on the s13 with rear valance. And maybe an s12 next. Who knows :P Starting a new job soon so I won't have all the time in the world to make these.

http://i7.photobucket.com/albums/y259/mmdb/IMG_20120405_150306.jpg

[sr20drifter1]

That's hot looking!!!!Thanks for the text.

[Sidewayz silvia]

Just purchased this for my s14 and can't wait to install it... thanks again mmdb, legit seller A+++++

[mmdb]

Thanks for the feedback! Post up pix when you can! With that note, I wonder if the diffuser will fit on a non-jdm rear bumper without valances. Anyone want to volunteer in the socal area? :)

[boyou2]

for your information, a friend of mine doing them, in FRP or CF.

For example :

http://img339.imageshack.us/img339/2896/p1110955copie.jpg

[ze12o]

Next, I'll be working on the s13 with rear valance.

me want. you make.

-K

[Trinidrift3]

im in for my s13 coupe. if you can ship....

[mmdb]

Looking for a bumper atm.

[Om1kron]

good stuff, I'd run one on the 14 but it would have to be made around the vertex rear bumper.

[killer skittle]

I want! how do i get one? im in ATL!

What is it made out of? ABS?

[cured13]

for your information, a friend of mine doing them, in FRP or CF.

For example :

http://img339.imageshack.us/img339/2896/p1110955copie.jpg
have a pics of it in CF on s13

[mmdb]

good stuff, I'd run one on the 14 but it would have to be made around the vertex rear bumper.

I could make one for whatever rear bumper, I just need the bumper to make a template.

I want! how do i get one? im in ATL!

What is it made out of? ABS?

If you got a JDM s14 rear kouki with valances I have the template made. The base of the diffuser is made of DiCore and the strakes are made of Alumalite. If you do a brief search the panels are made to withstand the forces of nature to at an extreme.

[Sidewayz silvia]

Sounds like it should withstand rock chips and most road rash...

[1990 s13]

I want to see how it looks on a s13 hatch i really want one

[Encore]

Pm me a price please, I have a s14 jdm rear w/valances

[mmdb]

Anyone in the socal area interested in a diffuser? I need to make some adjustments to the design. PM me if you're interested.

[SR20PWRALTY]

just pm'ed you

[ShakotanGazelle]

wanna do some for two other cars? 300zx and an s12?


This would look terrible on an S12 IMO. Too boxy, not enough curves.
Only way would be to go full super-silhouette, which would still look terrible. :barf:

Just my .02 as a fellow S12 owner.

[Breitling]

i am going to start messing around with Dibond as well...

[heyitzalan]

pm me, how.much to have s14 one made shipped to 11236

[OuTLaVvZ]

would it be allright for dailying and drifting?? and is there one for regular s14 bumper

[Om1kron]

I could make one for whatever rear bumper, I just need the bumper to make a template.

Lets hook up one of these weekends to get one mocked up for my car, I'm interested in making one. Need to make some other adjustments to the rear of the car anyway. Would be neat to have.

[Trinidrift3]

are still making these or what?

[Te37]

I want one for my s14 kouki bumper, can I buy the dimensions off you and build my own? You use like 1/4 black abs?

[GripTerror]

id run one on my s13, but it would need to be doneon an s13 bn blister rear bumper :)

I think Id have to send u the whole bumper though lol.. as it would need cutting its like a parachute in the back

[jacobzking]

i found these on eBay. its just a generic rear diffuser but I took measurements and it seems like it would be a perfect fir on the s14.

the downside to this one is that it doesn't cover the far outskirts of the bumper... just the middle section. how bad is that? is it only like 50% effective that way, or maybe more like 75%? 0% effective? lol.

[S14kouki_10]

Im interested in getting one for my kouki PM me

[jr_ss]

Mmdb- I'd be interested in one for a stock S14 rear bumper with the Zenki valences... Perhaps I missed it but where do they attach to? Thanks in advance.

-Glenn

[imnatelol]

What type of testing is done on these? Is there even any legitimate aero theory applied to the design of the diffuser? The reason I ask is because from the pictures of the product it appears that there is no lip on the end of it which would defeat the theory of vacuum adhesion that a diffuser is designed for. You know there will hardly be a real aero effect without a full flat undertray? Functionality aside, I think it looks cool on that black Kouki, awesome for hard parkers.

[implayaz9]

pmed
msg length

[mmdb]

Thanks ManoNegra for reminding me of this post! :) <3 I still owe you hood posts... pin things... damn it! I forget. If you buy 'em I'll reimburse you ;) I'm slow... and busy!

I made one for a kouki jdm rear bumper, but the user royally screwed me (proper feedback given), and I wasn't able to verify fit and finish. The next few diffusers I make I'd like the person to be local so I can have immediate feedback and verify fit and finish. I know some of you have PM'd me, and I apologize for not getting back to you. I've been pretty busy with my new job among with a few other things.

Lets hook up one of these weekends to get one mocked up for my car, I'm interested in making one. Need to make some other adjustments to the rear of the car anyway. Would be neat to have.

Yeah since we've met and you're a cool guy PM me whenever you want to come over and I can take some measurements to make one.


What type of testing is done on these? Is there even any legitimate aero theory applied to the design of the diffuser? The reason I ask is because from the pictures of the product it appears that there is no lip on the end of it which would defeat the theory of vacuum adhesion that a diffuser is designed for. You know there will hardly be a real aero effect without a full flat undertray? Functionality aside, I think it looks cool on that black Kouki, awesome for hard parkers.

Honestly, ZERO - I've made one for my car cause I liked how it looked. I agree with your statement (no flat bottom = no bueno). You'd want a diffuser along with a front splitter and flat bottom to accelerate the air fast enough for the diffuser to its job correctly. At that point your car would be a track car, or close to it; which, in my opinion, isn't very many of the drivers here :X With that in mind, there is real world effect of driving the car in the rain and seeing the water droplets being flung up behind the car (see ALMS at long beach first day). Aero, is often overlooked!

[Breitling]

Found a local scrap yard that recycles dibond signs.... I can buy it for SUPER CHEAP if anyone wants me to pick some up for them and ship it. I think its about 1.50 a pound.. .which is alot of dibond because it weighs so little.

[2muchboost]

Def let me know if these are made for OEM Zenki bumpers :) Nice looking parts for sure.

[tqstarburst]

Local time attack s14.
http://i47.tinypic.com/2qs5shf.jpg
http://i47.tinypic.com/33lmn8p.jpg

[jacobzking]

i found these on eBay. its just a generic rear diffuser but I took measurements and it seems like it would be a perfect fir on the s14.

the downside to this one is that it doesn't cover the far outskirts of the bumper... just the middle section. how bad is that? is it only like 50% effective that way, or maybe more like 75%? 0% effective? lol.

Anyone have any thoughts on that universal eBay one?

[Encore]

Still very interested in buying one of these if your still making them. Last you told me you wanted to test one locally to get the fit right, how did that go?

[drdre]

still making these?