Pfadt Header Install
Thread Starter
Former Vendor
Joined: Jul 2007
Posts: 1,255
Likes: 9
From: Marietta Ga
Pfadt Header Install
MTI Racing just installed a set of the Pfadt Long Tube Headers on Garry's C7 Corvette and man does it sound good. Not only do the headers add power to the C7 but they also give it the aggressive sound to match it's aggressive looks. The Pfadt Header kit includes long tube headers, catted connection pipes, all clamps, gaskets, fasteners, and x-pipe center section that ties into the factory muffler system at the rear of the car. And to top it all off we installed a set of MTI Racing Hot Spark Plug Wires to handle the most extreme conditions possible under the hood. With the addition of the headers and tuning the power increased to 440rwhp and torque to 433 at the tire. This makes the engine power 517hp and the torque 509.
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
Great job Guys! Those plug wire covers are definitely a great MTI touch. Had a call from Gary the other day and he couldn't stop talking about how great it sounded.
Pfadt Race Engineering
888-972-2464
info@pfadtracing.com
Pfadt Race Engineering
888-972-2464
info@pfadtracing.com
Pro
Joined: Mar 2011
Posts: 581
Likes: 17
These headers dont seem to be adding as much power as other brands. Other shops have picked up 25 HP and 34 TQ with just a tune. So these headers seem to have only picked up 15 HP and 2 TQ over what one could achieve with a tune only.
Thread Starter
Former Vendor
Joined: Jul 2007
Posts: 1,255
Likes: 9
From: Marietta Ga
Every dyno is a little different. We have been seeing gains of 20hp with a tune alone and 40 to 50 hp with a tune and headers. There is also more to be had if you go catless. If I recall correctly Garys car had a catted center section. We could easily manipulate things so that it looks like we gained more power but we try not to play that dyno number game.
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
It never adds up like that and it never has.
This just once again confirms, headers + tune, regardless of the brand = ~40-50RWHP.
No big surprise here, that is what we've seen with the LS motors for years. Same firing order and the same displacement as a LS3. Yes you have the VVT stuff, which is why the torque curve looks different. If you want more power than 40-50, you have to add a CAI, camshaft, heads, supercharger, ect.
When OBX, TSP, and every other company has their version of headers ready we'll see them all land between 40-50RWHP with a tune. Its been happening for 15 years now...I'm not sure how anyone missed that
This just once again confirms, headers + tune, regardless of the brand = ~40-50RWHP.
No big surprise here, that is what we've seen with the LS motors for years. Same firing order and the same displacement as a LS3. Yes you have the VVT stuff, which is why the torque curve looks different. If you want more power than 40-50, you have to add a CAI, camshaft, heads, supercharger, ect.
When OBX, TSP, and every other company has their version of headers ready we'll see them all land between 40-50RWHP with a tune. Its been happening for 15 years now...I'm not sure how anyone missed that
While they all may create *about* the same horsepower, there are so many other things to consider other than peak horsepower. The torque curve is one of those things, which I know you already know about from your other posts. Check out this info on why a Tri-Y is a great option for optimizing your torque curve:"The optimized header {Tri-Y} and exhaust system improves torque and sound quality from the LS7 engine."
Source: General Motors, Chevrolet
http://media.chevrolet.com/media/us/...-z281-ls7.html
"The Tri-Y has long been popular in road racing, favored for its ability to vector hot gases into primary collectors then into the secondary collector. This gets you a broader torque curve, which is ideal for road racing and street driving."
Source: Automedia: Choosing the Right Headers : http://www.automedia.com/Choosing_th.../pht20120401ch
"The benefits of the Tri-Y are that it has a broader power curve, and generally it starts accelerating from a lower rpm and commonly will accelerate longer, creating a flatter, broader torque curve.."
Source:PRI Magazine: New Header Developments :http://epub.performanceracing.com/di...php?id=1095721
"While typical off-the-shelf street 4-into-1 headers do not have secondary pipes, Burns' research has proven repeatedly that his Tri-Y designs make more overall power over a broader rpm range. While traditional lines of thought have street enthusiasts knowing Tri-Y pipes make more bottom-end torque, further research by Burns into the design have resulted in headers making more power all across the rpm range. With more components as part of the Tri-Y design, more tuning possibilities exist, and therefore more potential lives within."
Source:Popular Hot Rodding:
http://www.popularhotrodding.com/tec...d_header_tech/
"The general consensus with engine builders is that this design {tri-y} broadens the torque curve while the four-into-one headers tend to be more peaky"
Source:John Lingenfelter: Modifying Small-Block Chevy Engines: High Performance : page 131
http://books.google.com/books?id=GUC...to%201&f=false
Pfadt Race Engineering
888-972-2464
info@pfadtracing.com
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Tech Contributor
Joined: Jan 2006
Posts: 4,761
Likes: 240
From: Saint Louis MO
St. Jude Donor '14-'15
Well, that, and the whole matter of OBX stealing designs in the past...
I'll pay more and keep it in the US instead of getting cheaply made stuff. And I have used OBX and Pacesetter in the past to save $... Ask me how that turned out.
I'll pay more and keep it in the US instead of getting cheaply made stuff. And I have used OBX and Pacesetter in the past to save $... Ask me how that turned out.
Thread Starter
Former Vendor
Joined: Jul 2007
Posts: 1,255
Likes: 9
From: Marietta Ga
The MTI Racing Hot Spark Plug Wires were specifically designed to handle the extreme conditions found under the hood without factory heat shields. We have found over the years that the factory heat shields can actually shorten the life of the stock wire by retaining heat.
Tech Contributor
Joined: Jan 2006
Posts: 4,761
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From: Saint Louis MO
St. Jude Donor '14-'15
Instructor
Joined: Dec 2013
Posts: 107
Likes: 2
some workarounds exist in a forms of coating or wrapping.
i just don't get why header manufacturers skip on this.
underhood temps definitely rise significantly and in a long term eveything under the bonnet is slowly coocked...
Le Mans Master
Joined: Sep 1999
Posts: 7,810
Likes: 417
From: FL
OK......how DID that turn out for you....not to well right?
Le Mans Master
Joined: Sep 1999
Posts: 7,810
Likes: 417
From: FL
MTI Racing just installed a set of the Pfadt Long Tube Headers on Garry's C7 Corvette and man does it sound good. Not only do the headers add power to the C7 but they also give it the aggressive sound to match it's aggressive looks. The Pfadt Header kit includes long tube headers, catted connection pipes, all clamps, gaskets, fasteners, and x-pipe center section that ties into the factory muffler system at the rear of the car. And to top it all off we installed a set of MTI Racing Hot Spark Plug Wires to handle the most extreme conditions possible under the hood. With the addition of the headers and tuning the power increased to 440rwhp and torque to 433 at the tire. ]
Thanks.
Tech Contributor
Joined: Jan 2006
Posts: 4,761
Likes: 240
From: Saint Louis MO
St. Jude Donor '14-'15
Negatively, to say the least.
Fitment issues, poor construction (bad welds, etc), material is crappy (very thin 409 or less)... One of the sets actually cracked a weld from heat cycling...
I learned a while back that the initial cost savings will cost you in the long run.
Fitment issues, poor construction (bad welds, etc), material is crappy (very thin 409 or less)... One of the sets actually cracked a weld from heat cycling...
I learned a while back that the initial cost savings will cost you in the long run.
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
Pfadt Race Engineering
888-972-2464
info@pfadtracing.com
