FI Header Size
Thread Starter
Instructor
Joined: Feb 2015
Posts: 203
Likes: 5
FI Header Size
Hi, I am relatively new to the forum. I might be bringing up a old topic but I could not find a thread on this subject. What is everyone's opinion/experience between 1 3/4 and 1 7/8 headers on a FI Z06?
My setup is as follows. AA supercharger with 3.8" pulley, 1 7/8 American racing longtubes with 3" x-pipe to factory Ti mufflers, trans mount and diff brace, ceterforce twin disc DYAD clutch. I have been driving it with the supercharger and the factory exhaust for a while but just had the new exhaust put on and new clutch. Not really for sure yet as I haven't drove it much since the new mods but it feels like I may have lost some low end torque. Would this be normal? Any info would be greatly appreciated as I am fairly new to FI.
My setup is as follows. AA supercharger with 3.8" pulley, 1 7/8 American racing longtubes with 3" x-pipe to factory Ti mufflers, trans mount and diff brace, ceterforce twin disc DYAD clutch. I have been driving it with the supercharger and the factory exhaust for a while but just had the new exhaust put on and new clutch. Not really for sure yet as I haven't drove it much since the new mods but it feels like I may have lost some low end torque. Would this be normal? Any info would be greatly appreciated as I am fairly new to FI.
Instructor
Joined: Mar 2015
Posts: 108
Likes: 3
You need to rewrite your post so it makes sense..
1. You are asking about headers, but you say you already have them??
2. if you have headers, the whatever you have is fine... no need for any changes unless you like throwing money out of the window.
3. You only "feel" like you lost something because you now feel the top end pull or power.. blowers don't make you lose anything because it only "adds" air.. doesn't take it away unless you have a retard for a tuner that put 8 degrees in there for "safety"
1. You are asking about headers, but you say you already have them??
2. if you have headers, the whatever you have is fine... no need for any changes unless you like throwing money out of the window.
3. You only "feel" like you lost something because you now feel the top end pull or power.. blowers don't make you lose anything because it only "adds" air.. doesn't take it away unless you have a retard for a tuner that put 8 degrees in there for "safety"
Last edited by Big Jt; Apr 20, 2015 at 05:01 AM.
Thread Starter
Instructor
Joined: Feb 2015
Posts: 203
Likes: 5
Yes I do already have the headers but I was just wondering what people's experince and opinions between the two sizes were with the type of setup I have. Like I said I am new to FI and am just trying to learn what I can from people who know more than me and have more experience.
Race Director
Joined: Mar 2008
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From: Rio Rancho NM
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Melting Slicks
Joined: Jul 2004
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From: Northern Ireland
Hi, I am relatively new to the forum. I might be bringing up a old topic but I could not find a thread on this subject. What is everyone's opinion/experience between 1 3/4 and 1 7/8 headers on a FI Z06?
My setup is as follows. AA supercharger with 3.8" pulley, 1 7/8 American racing longtubes with 3" x-pipe to factory Ti mufflers, trans mount and diff brace, ceterforce twin disc DYAD clutch. I have been driving it with the supercharger and the factory exhaust for a while but just had the new exhaust put on and new clutch. Not really for sure yet as I haven't drove it much since the new mods but it feels like I may have lost some low end torque. Would this be normal? Any info would be greatly appreciated as I am fairly new to FI.
My setup is as follows. AA supercharger with 3.8" pulley, 1 7/8 American racing longtubes with 3" x-pipe to factory Ti mufflers, trans mount and diff brace, ceterforce twin disc DYAD clutch. I have been driving it with the supercharger and the factory exhaust for a while but just had the new exhaust put on and new clutch. Not really for sure yet as I haven't drove it much since the new mods but it feels like I may have lost some low end torque. Would this be normal? Any info would be greatly appreciated as I am fairly new to FI.
You mention a supercharger kit...but not which supercharger. Not what power you think it has, not whether the engine itself has been modified etc
But really...you'd need to be making some very very big numbers before you would need bigger headers than 1 7/8"
Even 1 3/4" are perfectly adequate for most.