DIY - GT4 Fabspeed Sport Headers
#16
#19
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From: Fort Washington, Pa
Looks like you were speaking with my man Brian over here, i shot you over an email personally but give me a call when you have a chance (215 646 4945) we can go over both options
Agreed
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Porsche Performance Specialist
John@Fabspeed.com
215-618-9796
Fabspeed Motorsport USA
155 Commerce Drive Fort Washington, PA 19034
www.Fabspeed.com
Porsche Performance Specialist
John@Fabspeed.com
215-618-9796
Fabspeed Motorsport USA
155 Commerce Drive Fort Washington, PA 19034
www.Fabspeed.com
#20
Thanks for this great DIY - it gave me the guts to DIY my Cargraphics Sport headers.
Unlike the Fabspeeds, the longer intake runners on the Cargraphics are not nearly as friendly to putting the bolts in. You really need a short thin wall e12 socket, as well as a very high quality swivel. It helps to have infant sized hands as well. I got mine in, but was very scared I cross threaded a bolt - if you feel any significant resistance, back the bolt out immediately. The trick I found was put one easily reachable bolt in, and then do all the hard to reach ones, then put in the rest of the easy ones. You'll see what I mean when you are under there.
I have the IPD plenum and 82mm throttle body, and have been running the Cobb stage 1 OTS map thus far. With the headers, I switched to the stage two map. So far so good, two complete drive cycles and no CEL. You immediately notice more low end, the 3500 rpm gap is filled in completely. There is still a bit of a flat stop in the power curve at 4500-5000 rpm, but the car really pulls hard after that, now. I'm really happy with the sport headers - I don't like running a convertible completely catless. Need to head to the dyno soon, to get some real data.
sound-wise, the tone is much more interesting. I'd say 20-30% louder, but the pops on overrun are more natural sounding and 50% louder. With the valves closed on the stock PSE, it's hardly noticeable, but you can tell immediately when you roll into the throttle that something is different.
Cargraphics doesn't include a bolt and nut set for the header to catback transition either, luckily I had some, but you have to be pretty careful to find some that are long enough to tighten but short enough to maneuver into the driver's side, where the flange to cat clearance isn't great either.
Unlike the Fabspeeds, the longer intake runners on the Cargraphics are not nearly as friendly to putting the bolts in. You really need a short thin wall e12 socket, as well as a very high quality swivel. It helps to have infant sized hands as well. I got mine in, but was very scared I cross threaded a bolt - if you feel any significant resistance, back the bolt out immediately. The trick I found was put one easily reachable bolt in, and then do all the hard to reach ones, then put in the rest of the easy ones. You'll see what I mean when you are under there.
I have the IPD plenum and 82mm throttle body, and have been running the Cobb stage 1 OTS map thus far. With the headers, I switched to the stage two map. So far so good, two complete drive cycles and no CEL. You immediately notice more low end, the 3500 rpm gap is filled in completely. There is still a bit of a flat stop in the power curve at 4500-5000 rpm, but the car really pulls hard after that, now. I'm really happy with the sport headers - I don't like running a convertible completely catless. Need to head to the dyno soon, to get some real data.
sound-wise, the tone is much more interesting. I'd say 20-30% louder, but the pops on overrun are more natural sounding and 50% louder. With the valves closed on the stock PSE, it's hardly noticeable, but you can tell immediately when you roll into the throttle that something is different.
Cargraphics doesn't include a bolt and nut set for the header to catback transition either, luckily I had some, but you have to be pretty careful to find some that are long enough to tighten but short enough to maneuver into the driver's side, where the flange to cat clearance isn't great either.
#21
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Joined: Nov 2006
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From: Fort Washington, Pa
Thanks for this great DIY - it gave me the guts to DIY my Cargraphics Sport headers.
Unlike the Fabspeeds, the longer intake runners on the Cargraphics are not nearly as friendly to putting the bolts in. You really need a short thin wall e12 socket, as well as a very high quality swivel. It helps to have infant sized hands as well. I got mine in, but was very scared I cross threaded a bolt - if you feel any significant resistance, back the bolt out immediately. The trick I found was put one easily reachable bolt in, and then do all the hard to reach ones, then put in the rest of the easy ones. You'll see what I mean when you are under there.
I have the IPD plenum and 82mm throttle body, and have been running the Cobb stage 1 OTS map thus far. With the headers, I switched to the stage two map. So far so good, two complete drive cycles and no CEL. You immediately notice more low end, the 3500 rpm gap is filled in completely. There is still a bit of a flat stop in the power curve at 4500-5000 rpm, but the car really pulls hard after that, now. I'm really happy with the sport headers - I don't like running a convertible completely catless. Need to head to the dyno soon, to get some real data.
sound-wise, the tone is much more interesting. I'd say 20-30% louder, but the pops on overrun are more natural sounding and 50% louder. With the valves closed on the stock PSE, it's hardly noticeable, but you can tell immediately when you roll into the throttle that something is different.
Cargraphics doesn't include a bolt and nut set for the header to catback transition either, luckily I had some, but you have to be pretty careful to find some that are long enough to tighten but short enough to maneuver into the driver's side, where the flange to cat clearance isn't great either.
Unlike the Fabspeeds, the longer intake runners on the Cargraphics are not nearly as friendly to putting the bolts in. You really need a short thin wall e12 socket, as well as a very high quality swivel. It helps to have infant sized hands as well. I got mine in, but was very scared I cross threaded a bolt - if you feel any significant resistance, back the bolt out immediately. The trick I found was put one easily reachable bolt in, and then do all the hard to reach ones, then put in the rest of the easy ones. You'll see what I mean when you are under there.
I have the IPD plenum and 82mm throttle body, and have been running the Cobb stage 1 OTS map thus far. With the headers, I switched to the stage two map. So far so good, two complete drive cycles and no CEL. You immediately notice more low end, the 3500 rpm gap is filled in completely. There is still a bit of a flat stop in the power curve at 4500-5000 rpm, but the car really pulls hard after that, now. I'm really happy with the sport headers - I don't like running a convertible completely catless. Need to head to the dyno soon, to get some real data.
sound-wise, the tone is much more interesting. I'd say 20-30% louder, but the pops on overrun are more natural sounding and 50% louder. With the valves closed on the stock PSE, it's hardly noticeable, but you can tell immediately when you roll into the throttle that something is different.
Cargraphics doesn't include a bolt and nut set for the header to catback transition either, luckily I had some, but you have to be pretty careful to find some that are long enough to tighten but short enough to maneuver into the driver's side, where the flange to cat clearance isn't great either.
#23
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From: Fort Washington, Pa
None yet, IPD had an equipment failure hence the nationwide backorder. We have a stocking order that I'm told is top priority as soon as they finish their first batch. You and several others are on that list for first plenums out their door.
#24
Thanks for this great DIY - it gave me the guts to DIY my Cargraphics Sport headers.
Unlike the Fabspeeds, the longer intake runners on the Cargraphics are not nearly as friendly to putting the bolts in. You really need a short thin wall e12 socket, as well as a very high quality swivel. It helps to have infant sized hands as well. I got mine in, but was very scared I cross threaded a bolt - if you feel any significant resistance, back the bolt out immediately. The trick I found was put one easily reachable bolt in, and then do all the hard to reach ones, then put in the rest of the easy ones. You'll see what I mean when you are under there.
Unlike the Fabspeeds, the longer intake runners on the Cargraphics are not nearly as friendly to putting the bolts in. You really need a short thin wall e12 socket, as well as a very high quality swivel. It helps to have infant sized hands as well. I got mine in, but was very scared I cross threaded a bolt - if you feel any significant resistance, back the bolt out immediately. The trick I found was put one easily reachable bolt in, and then do all the hard to reach ones, then put in the rest of the easy ones. You'll see what I mean when you are under there.
#25
Jnosol: What is the basis for using 15ft-lbs when Fabspeed recommends 22ft-lbs? Are you assuming the swivel and extension add torque, so that the 15ft-bs at the wrench is multiplied to achieve 22ft-lbs at the bolt head?
A couple of us have reported lost bolts when torqued to the "old" 17ft-lbs specification after track days or many miles (6000 in my case.) I would think you would lose a lot of bolts at 15ft-lbs if that's the actual torque on the bolt in the head.
A couple of us have reported lost bolts when torqued to the "old" 17ft-lbs specification after track days or many miles (6000 in my case.) I would think you would lose a lot of bolts at 15ft-lbs if that's the actual torque on the bolt in the head.
#26
Jnosol: What is the basis for using 15ft-lbs when Fabspeed recommends 22ft-lbs? Are you assuming the swivel and extension add torque, so that the 15ft-bs at the wrench is multiplied to achieve 22ft-lbs at the bolt head? A couple of us have reported lost bolts when torqued to the "old" 17ft-lbs specification after track days or many miles (6000 in my case.) I would think you would lose a lot of bolts at 15ft-lbs if that's the actual torque on the bolt in the head.
You'll see what I mean when I work on it. It's putting very extreme angle on the swivel for the a couple bolts.
Last edited by Jnosol; 08-01-2016 at 11:28 AM.
#27
Curious guys for those that have the Sport Headers....Have any of your engine temps changed? Run hotter? Same? Cooler with the sport headers installed?
John maybe you can chime in as well if the data is readily available?
thanks
John maybe you can chime in as well if the data is readily available?
thanks
#28
My car is running exactly the same. I did have them swain coated but for street driving I do not think I would notice the heat difference in the cabin.
I believe the Sport Header options on this forums are equal if not better made than the OEMs although the OEMs are very well made so I am not knocking them but they do limit the car's potential
I believe the Sport Header options on this forums are equal if not better made than the OEMs although the OEMs are very well made so I am not knocking them but they do limit the car's potential
#29
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From: Fort Washington, Pa
My car is running exactly the same. I did have them swain coated but for street driving I do not think I would notice the heat difference in the cabin.
I believe the Sport Header options on this forums are equal if not better made than the OEMs although the OEMs are very well made so I am not knocking them but they do limit the car's potential
I believe the Sport Header options on this forums are equal if not better made than the OEMs although the OEMs are very well made so I am not knocking them but they do limit the car's potential