Are OBX bolt ons any good?

[Mystert85]

i am new to the import/dsm life and as i troll ebay looking for a few bolt ons i keep coming across parts by OBX they are in my price range (cheap) but i dont want them to be junk and end up hurting my motor...can anyone tell me about them?

 

[907gs-t]

i have a obx cat no issuse's here.

 

[my dreamt dsm]

Heard of APC at autozone. It's like that but with more parts to offer.

 

[Diamondrev]

i have the obx intake manifold.. no problems...

 

[talon1997420a]

i too have the obx intake manifold, and also i believe my car has obx cams. my car runs pretty good so no complaints here either

 

[Fotowntalon]

OBX seems to be hit and miss depending on the peice you get. OBX normally looks at someone elses product that works and stamps there logo on it, I think of it as almost a generic brand. For the most part they make decent items, but there has been many many complaints about the obx intake manifold, from improper fitment to beeing prone to cracking, yet as you can see form previous replies others have had good luck.

For my advice as to wether to buy from them, it all depends on what exactly you want.
OBX TB spaceer - No, spacers dont work for us
OBX Intake Manifold - No, its so much cheaper to P&P out IM's and they work just as good
OBX radiator hoses - I am getting these soon, how can you mess up a silicone hose?

For the most part, just do some research and ask around, chances are at least a few people have tryed the product and will more than likly give you helpful feedback.

 

[Mystert85]

OBX TB spaceer - No, spacers dont work for us

i dont want to sound stupid but i am new so....why do spacers not work?

 

[BK85]

OBX also makes a LSD and sells it on Ebay, anyone have experience with that?

BK85

 

[Fotowntalon]

i dont want to sound stupid but i am new so....why do spacers not work?

Fluid flow is incredibly difficult to visualize. You can't really determine how a shape will influence flow just by looking at it. There are too many other factors to take into account. The only real way to approach this problem, without empirically testing it of course, is to perform a detailed analysis using computational fluid dynamics.

As a rule of thumb, however, you want less turbulent, more laminar flow before air meets fuel. In general, tubing with square and rectangular cross sections keep laminar fluid flow better than tubing with a circular cross section. Furthermore, rough textures are obviously more prone to creating turbulence.

Plena in carbureted cars tend to have rough interior textures to purposefully create turbulence and discourage the fuel from pooling. The interior textures of any car with port injected EFI systems, on the other hand, should be rather smooth. Turbulence of any kind before the fuel injectors is a bad thing.

posted by VelocitàPaola from the forum http://www.dsmtuners.com/forums/420...-body-spacer-dsm-eclipse-nt-420a-95-99-a.html
there is actually a lotta of discusion on them. for the most part 90% of people agree they are a gimick to con people out of there money. There are some who "think" they got power, but havnt actually dynoed it. The only real reason to get one is to add a "whistling" sound to your car. Bottom line, for such a controversial part its worth saving your money for a proven modification. If ya want more inflo just search for it

 

[Mystert85]

thanks fotowntalon...you just saved me a little money....i cant afford a turbo setup now so what is the best way to gaine a little power? it already has a ram air and a axel back exauhst...i have little funds so i have to spend wisely

 

[Fotowntalon]

A lot depends on if you plan on turboing in the future or not, if you don't then i'd get some headers to complete your exhaust, and possibly a test pipe (depending on your states emissions) A lot of people like porting there TB's and having there IM's to match, do some searching for the size you want, if you are going turbo then get 60mm for sure, if staying NA then go form 55-60mm depending on what you want. UDP is another decently cheap power adder, but you may want to save it for when you redo cams, or something that deals with timing so you dont have to mess with your timing any more than you have to, there is a nice tech guide here ->Tech Guide: 2G 420A Power Upgrades - DSMtuners
Just follow by your budget, and future plans.

 

[Mystert85]

i plan to stay n/a for a while...i have a pacesetter header on it now and i was told the tin can noise that my car makes at 2500+ rpm is due to the cat being rodded out...will a test pipe fix this? i live in VA so im not worried about emmision tests....one last question...

A lot of people like porting there TB's and having there IM's to match

i guess TB stands for throttle Body but what is a IM? i was raised on old gas guzzling muscle cars so im new to these newfangled things

thanks for all your help...i would be lost without this forum

 

[knight007]

OBX also makes a LSD and sells it on Ebay, anyone have experience with that?

BK85

ive heard issues of lsd bolts backing out but not first hand experience with them.

 

[Diamondrev]

i plan to stay n/a for a while...i have a pacesetter header on it now and i was told the tin can noise that my car makes at 2500+ rpm is due to the cat being rodded out...will a test pipe fix this? i live in VA so im not worried about emmision tests....one last question...



i guess TB stands for throttle Body but what is a IM? i was raised on old gas guzzling muscle cars so im new to these newfangled things

thanks for all your help...i would be lost without this forum

IM means intake manifold

 

[740 Turbo Brick]

Basically, there are a few OBX bolt ons for our cars that are awesome. Others are trash.

1. OBX header/downpipe. For $200 shipped from ebay, these are an awesome bolt on. It depends on how you want to go, 4-2-1, or 4-1. Ive been told 4-2-1 is a bit more torquier, and 4-1 is more top end. I have it, and love it. Put it this way, I put a Greddy header and this one side by side, identical with an OBX badge welded on it.

2. OBX Rad hoses. They dress up the engine bay a bit. I got mine for free so of course I put them on, they match my MSD coil. For some reason where they clamp to the thermostat neck it is melting and getting silicon all over whatever it drips on. Other than that, nice thick hoses, pretty durable from what Ive seen.

3. OBX LSD. These get mixed reviews. They are a decent LSD, but the washers inside them will crack and break and generally #### everything up. People have replaced these washers and used it with no problems

4. OBX IM. Dont bother. I read on 2gnt, Experts agree the stock Intake is a turd, but no one has made anything any better. BulletDSM purchased one and looked inside, the runners stick up into the plenum, making airflow worse. Also, Im not sure on how Velocity/Volume of air intake works, but this IM will alter that, and change your Powerband slightly.

5. OBX Adj. Cam gears. Stay away. I REPEAT, STAY AWAY! Seen too many car guys have the bolts back out on them or the gear fail all together. Just....No. Get Fidanza or Unorthodox.

6. OBX TB Spacer. Gone over, pretty much something to take money from people who dont know better.

7. OBX Fuel rail. You shouldnt really need it, but I guess if you like flashy stuff, go right ahead.

 

[Fotowntalon]

4. OBX IM. Dont bother. I read on 2gnt, Experts agree the stock Intake is a turd, but no one has made anything any better. BulletDSM purchased one and looked inside, the runners stick up into the plenum, making airflow worse. Also, Im not sure on how Velocity/Volume of air intake works, but this IM will alter that, and change your Powerband slightly.

Not 100% true, there has been an amazing IM made, although it wasnt made my any big name company, was made by someone on this website. I think you can purchase them.
http://www.dsmtuners.com/forums/420a-bolt-tech/335223-new-turbo-intake-manifold.html
there is the link to the guys thread, he makes turbo and N/A IM's.

Yes TB=Throttle boddy IM=Intake manifold. Engines of all sizes follow some of the same princibles of the more air and fuel you can shove into those cylinders, the more power you will make.

 

[Locke]

Basically, there are a few OBX bolt ons for our cars that are awesome. Others are trash.

3. OBX LSD. These get mixed reviews. They are a decent LSD, but the washers inside them will crack and break and generally #### everything up. People have replaced these washers and used it with no problems

As well as the afore mentioned issue of them being received with broken belleville springs and loose bolts, you'll also want to chamfer the sidegears and/or bevel the axle clips if you ever want to be able to remove the axles after installation.

 

[LLs420a]

I am using the OBX adj. cam gears and have never had any problems. Just make sure the bolts used for adjusting are tightened down or you will definately **** your timing. Using locktite wouldn't hurt

 

[nothingfiction]

I think i'm awakening a dead thread... but oh well...

As a rule of thumb, however, you want less turbulent, more laminar flow before air meets fuel. In general, tubing with square and rectangular cross sections keep laminar fluid flow better than tubing with a circular cross section. Furthermore, rough textures are obviously more prone to creating turbulence

What I don't understand is this... Square vs. Circle. Let's assume they are both the same size. Wouldn't the corners of the square cause more turbulence than the smooth inside of a circle? Think about a mini tornado inside of your intake tube. Have you ever seen a short ram or cold air intake being squared? I haven't. So, to me the same thought process goes with the inside of your throttle body and intake mani as well.

Could someone enlighten me into my stupidity?

 

[Locke]

Round piping costs less to manufacture and bend, and is easier to work with during assembly.

There should not be a mini tornado in your intake tube, this is what you're attempting to avoid. Air spiralling around in a tube isn't flowing through the tube very well.

 

[nothingfiction]

Ok, not to hijack this thread...

But, from what im reading about air flow i think I understand. Same reasons as those stupid tornado insert things you see on telle late at night that you put into your air intake stream don't work. I understand that.

But as for circle vs square vs turbulence... the air in the cai is just simply sucked and not spiraled through like a big gust of wind, right? then it hits the tb which is really what makes those "fuel saver tornado" things worthless because of how it hits the butterfly. I believe thats how all that works. Then it hits the manifold plenum. Up till here everything has been more or less circular. Since the air then gets divided into 4 parts from the runners the plenum should be round inside and smooth so it doesnt have much resistance or whatever.

Now here is what seems to be getting me. the Stock runners or more squarish on the inside. the im listed above is simply round. the cost of tubing from the manufacturer i could care less about. what im interested to learn about is really why one is better than the other. Please intrigue a girl.