Where are the Crawford Header Before/After Dynos?
08-16-2005, 08:52 AM
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Where are the Crawford Header Before/After Dynos?
Well, I've got the headers and love 'em. I can DEFINITELY feel the gains but when I did my pre and post dynos I added a JIC Y-Pipe, changed the intake and added heavier wheels and have results that really cannot be compared. 
I know there are dynos out there and the search on here, g35driver and "the other 350z forum" aren't doing the trick.
Anyone have a link or a dyno graph to show?
I know there are dynos out there and the search on here, g35driver and "the other 350z forum" aren't doing the trick.
Anyone have a link or a dyno graph to show?
08-19-2005, 08:52 AM
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I have never seen them
I've been doing alot of research on headers lately as I wanted to get a set.
I chose Alphawerks. They had independent dynos. Crawfords are considered to be the best by many here, but they are very expensive, hard to install and for the money, not worth it for me.
Most guys with the Alphawerks are pulling 12-17 hp average with these headers and at $440.00 shipped it was a no brainer.
Good luck
I chose Alphawerks. They had independent dynos. Crawfords are considered to be the best by many here, but they are very expensive, hard to install and for the money, not worth it for me.
Most guys with the Alphawerks are pulling 12-17 hp average with these headers and at $440.00 shipped it was a no brainer.
Good luck
08-21-2005, 05:01 PM
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Good luck Neff! I spent hours on the same issue searching and searching before I made my header purchase. I don't think there are any pre and post dyno's on the Crawfords posted on any site.
08-21-2005, 06:03 PM
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Gosh Neff
You've seen my Dyno. Not a Before and After - But damn close!
Here it is again
I have a 2003 "G" 6MT Coupe. Blue Line
Mods:
TechnoSquare Crawford Reflash ECU
JWT PopCharger with "Z" Tube
Crawford V4 Plenum
Crawford HiFlow Cats
Crawford Headers
Invidia G200 Dual Exhaust with "H" Pipe
Ground Wires
Other Car is a 2005 "G" 6MT Coupe. Red Line
Mods:
Motordyne 3/8" Spacer
K&N Filter
"Z" Tube
Ground Wires
I don't have the graph of the 2005 without the spacer, but it showed a peak of 242HP.
As you can see - I pull him, buy a lot, in the low and middle ranges, but he catches me @ 6.3K and pulls ahead @ 6.6K. Peak readings - he has me by .4HP and I have him by 7.7 lb ft of torque.
The Crawford package works as evidenced by my Dyno. What part don't you understand? Each car had three runs. The '05, had 6 - 3 without the spacer, and 3 with. All results were consistent. The Crawford Package flat out works
Lou
You've seen my Dyno. Not a Before and After - But damn close!
Here it is again
I have a 2003 "G" 6MT Coupe. Blue Line
Mods:
TechnoSquare Crawford Reflash ECU
JWT PopCharger with "Z" Tube
Crawford V4 Plenum
Crawford HiFlow Cats
Crawford Headers
Invidia G200 Dual Exhaust with "H" Pipe
Ground Wires
Other Car is a 2005 "G" 6MT Coupe. Red Line
Mods:
Motordyne 3/8" Spacer
K&N Filter
"Z" Tube
Ground Wires
I don't have the graph of the 2005 without the spacer, but it showed a peak of 242HP.
As you can see - I pull him, buy a lot, in the low and middle ranges, but he catches me @ 6.3K and pulls ahead @ 6.6K. Peak readings - he has me by .4HP and I have him by 7.7 lb ft of torque.
The Crawford package works as evidenced by my Dyno. What part don't you understand? Each car had three runs. The '05, had 6 - 3 without the spacer, and 3 with. All results were consistent. The Crawford Package flat out works
Lou
08-21-2005, 06:26 PM
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Lowrider, thanks for the info.
Wow, that creates more questions than answers. The 20 hp at peak for the Crawford package would mean that your at about 228 without. If the reflash, Z tube and exhaust gave you a conservative 8 hp, that would put you at 220 stock. Somewhat low from what we have seen for an MT. I would think it is more likely that the entire package for the 03 is generating significantly less than 28 hp and the stock numbers on the 03 were more like 235.
Would still love to see a pre and post on the headers to see how much of the 20 hp peak is generated by them. We could also get a good idea of how much the plenum and cats add to the headers in order to make the 20 hp.
Wow, that creates more questions than answers. The 20 hp at peak for the Crawford package would mean that your at about 228 without. If the reflash, Z tube and exhaust gave you a conservative 8 hp, that would put you at 220 stock. Somewhat low from what we have seen for an MT. I would think it is more likely that the entire package for the 03 is generating significantly less than 28 hp and the stock numbers on the 03 were more like 235.
Would still love to see a pre and post on the headers to see how much of the 20 hp peak is generated by them. We could also get a good idea of how much the plenum and cats add to the headers in order to make the 20 hp.
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08-22-2005, 04:51 AM
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1. Tony, the stock 6MT's dynoed at the first CFL dyno day were all right around 230rwhp. We also showed that G's with the z-tube gained ~5-7rwhp through out most of the rpm range. Don't forget that the 350z has a z-tube 
so the G's should also have this mod and then gain the +20 at peak. This means that a dyno showing 255-257rwhp is what I'd expect to see.
2. I got this e-mail from BJ at 350EVO this morning...
so the G's should also have this mod and then gain the +20 at peak. This means that a dyno showing 255-257rwhp is what I'd expect to see.2. I got this e-mail from BJ at 350EVO this morning...
Todd,
We cannot release dyno numbers as they are done by our engine builder and they will not release them. I can tell you that from the ones we tested..Nismo, Xerd, our first prototype set..... Crawford made better torque. We are currently developing headers that we think will be a better race design...but as of right now ..Crawfords are the best of the shelf headers available for the 350Z and G35.
Cheers
BJ
This means that even the Xerd long tube headers (with built in straight pipes) don't make as much torque as the Crawford Headers! We cannot release dyno numbers as they are done by our engine builder and they will not release them. I can tell you that from the ones we tested..Nismo, Xerd, our first prototype set..... Crawford made better torque. We are currently developing headers that we think will be a better race design...but as of right now ..Crawfords are the best of the shelf headers available for the 350Z and G35.
Cheers
BJ
08-24-2005, 01:24 PM
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Originally Posted by neffster
1. Tony, the stock 6MT's dynoed at the first CFL dyno day were all right around 230rwhp. We also showed that G's with the z-tube gained ~5-7rwhp through out most of the rpm range. Don't forget that the 350z has a z-tube so the G's should also have this mod and then gain the +20 at peak. This means that a dyno showing 255-257rwhp is what I'd expect to see.
2. I got this e-mail from BJ at 350EVO this morning...
so the G's should also have this mod and then gain the +20 at peak. This means that a dyno showing 255-257rwhp is what I'd expect to see.2. I got this e-mail from BJ at 350EVO this morning...
Todd,
We cannot release dyno numbers as they are done by our engine builder and they will not release them. I can tell you that from the ones we tested..Nismo, Xerd, our first prototype set..... Crawford made better torque. We are currently developing headers that we think will be a better race design...but as of right now ..Crawfords are the best of the shelf headers available for the 350Z and G35.
Cheers
BJ
This means that even the Xerd long tube headers (with built in straight pipes) don't make as much torque as the Crawford Headers! We cannot release dyno numbers as they are done by our engine builder and they will not release them. I can tell you that from the ones we tested..Nismo, Xerd, our first prototype set..... Crawford made better torque. We are currently developing headers that we think will be a better race design...but as of right now ..Crawfords are the best of the shelf headers available for the 350Z and G35.
Cheers
BJ
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