OBX Headers?

[mgbrv8]

Im still digging my OBXs I cant get over how they stay shiny most dull by now.

Dave

[sammy]

oh just to clarify the 90 only has porting done to the inj housings and plenum . heads are still stk .

[ZZZZZR1]

First off, let me say I'm sure Corey's headers are far superior than OBX (not just the fact that they are produced in China).

Quality product from a QUALITY ZR-1 tuner in the US!!!!! Bonus!

As far as saying OBX / Stainlessworks headers are going to give you far less "RWHP" or MPH (in the quarter mile) is doubtful.

Brad is comparing two different cars and not the "same" car. In order to get a true comparison, you must install OBX/Stainlessworks and dyno the car. Then uninstall and reinstall Corey's headers and do the same test.

I have StainlessWorks headers (relatively happy with it), but if Corey was making his a few years ago.... I would have purchased his!


Love to see a "true" test of all of the headers....



David

[sammy]

Originally Posted by ZZZZZR1

First off, let me say I'm sure Corey's headers are far superior than OBX (not just the fact that they are produced in China).

Quality product from a QUALITY ZR-1 tuner in the US!!!!! Bonus!

As far as saying OBX / Stainlessworks headers are going to give you far less "RWHP" or MPH (in the quarter mile) is doubtful.

Brad is comparing two different cars and not the "same" car. In order to get a true comparison, you must install OBX/Stainlessworks and dyno the car. Then uninstall and reinstall Corey's headers and do the same test.

I have StainlessWorks headers (relatively happy with it), but if Corey was making his a few years ago.... I would have purchased his!


Love to see a "true" test of all of the headers....



David

i am sorry maybe i didnt write it correctly . the comparison was done on the same car . i took the headers off the 90 as the head gasket was blown on that car and put the jeal headers on the 92 . the power difference was to the 92 car . it made 17 wrhp more and 6lbs of tq more with the jeal than with the stainless works /obx design . all dyno runs were done on the same dyno on different days.also it was just a little warmer on the tests with the jeal headers . we did 4 pulls on both tests . all pull were within 4wrhp of each other .the only change to the car was changing the headers , i used the same exhaust that was on the car and didnt do anything in the way of tuning the car . it allways buged me that my 90 made more power with just with just headers and inj housing and plenum porting than my 92 which is a callaway 475 super natural . this motor has ported inj housing plenum and heads ,as a part of the callaway 475 pkg . next i want to put coreys ported inj housings and plenum thats on the 90 on the 92 and see what the difference is .

[boostedmaxPSI]

Excellent thread Sammy. I emailed Corey to quote me a set of his headers. I'm ready for a set and based on your findings this will be the direction I will go. I will remind him to send you a commission check

[ZR WON]

All:

Been a long time since I was involved with headers, but I did have something to do with Stainless Works design. And I can tell you that Billy Kirchoffer (sp) originally started the process by having SW's pattern a Jeal header (which was a copy of the original Watson design, only utilizing one piece primary pipes). He stopped communicating with SWs and I picked up the ball and ran with it about a year later. Someone mentioned Corey's headers being longer than SWs. That's rather confusing to me.

If that is true, Either Corey has changed the design of the original Jeal's, or SW's has changed the design of it's version. As mentioned, the original SWs design, with the exception of the 1/4" flange (which was changed to 3/8" after about 10 sets were completed), looked exactly the same, and performance was the same. I have them on my car and it makes@400rwhp with Corey's port work. Which begs the question: How on earth does Jeal's design make even a couple more horsepower? I could see the difference maybe varying 2rwhp due to natural variables, but 12? That's rather hard for me to believe.

Is it possible that some people are confusing the OBX 'short tube' design as being similar to SW's? Again, maybe SW's redesigned their header to be a 'short tube' design, but I rather doubt it. Finally, I'm all for Corey getting the business, he's a great guy with a lot of talent and a true ZR-1 lover. SW's, while also a great company, produce products for *all* cars. I'm simply trying to make sure everyone (myself included) has accurate information re: various header designs.

Brian A.
90 ZR-1
ZR WON
12.09@118
01 Z06
not quite stock

[sammy]

the head gasket failure was on my 90. the comparison tests were done on my 92 which is running fine . decided to switch headers as it will be a while before i can get to fixing the 90. work this time of year is a 16 hr a day deal .

[efnfast]

Anybody got a pic of the Jeal/Corey headers. How long does a long tube header have to be to be a long tube header? -Steve

[ZR WON]

Here are the photos I have for the various headers (Jeal, SWs, Watson, and OBX, respectively). As you can see, the Jeal/Watson/SWs likely have an additional 2-3" worth of pipe in comparison to the OBX design (the Watson photo is of the 1-3/4" primary version, which is quite rare). As mentioned previously, I could see how the shorter tube OBX design wouldn't produce the power numbers of the Jeal/SWs/Watsons.

Also, I ran out to the garage and measured the primary length on my SWs on the drivers side (couldn't get to the passengers) They are:

#1: 25"
#3: 21.5"
#5: 19"
#7: 16.5"

Unless Corey has patterned his 'new' headers after the one of two truly equal length primary header sets ever manufactured (by LPE), his are going to measure roughly the same. I don't own OBX, so I cannot comment with actual measurements, but based on the photographic evidence, they are visibly shorter.

Brian A.
90 ZR-1
12.09@118
ZR WON
01 Z06
not quite stock

[Starman]

ZR WON- Your SSW header picture is not what they currently show on their website - also they call out 304 SS construction