edkwon Posted February 3, 2007 Share Posted February 3, 2007 Lets say i have a stg II modded car with aftermarket turboback exhaust, catless uppipe and ECU retune and get pretty good gains in power, are aftermarket headers really worth it in terms of power gains, noise and heat efficiency if i am just doing daily driving and no dedicated track work? Ed Link to comment Share on other sites More sharing options...
robsontuning Posted February 3, 2007 Share Posted February 3, 2007 It is all preference. I plan on putting headers on my car, but it is not at the top of the list. It also makes a difference on the design of the headers. Some only show gains on top end and lose power on the bottom. Others will show improvement across the board. Also with equal length you change the sound of the car. Groupe S, and GT Spec are not supposed to be as bad. Link to comment Share on other sites More sharing options...
BLACKonBLACK Limited Posted February 3, 2007 Share Posted February 3, 2007 I will be purchasing them shortly Its all part of the process for me (planing for the future.) Stage 1 Tune + Intake Stage 2 Tune + W/stock UP, and 3" TBE Stage 2.5 Tune + Headers with UP , TMIC Stage 3 Tune + Turbo upgrade, Fuel upgrade and METH Link to comment Share on other sites More sharing options...
mickeyd2005 Posted February 3, 2007 Share Posted February 3, 2007 team23jordan and shralp both got tuned by PDX. Here are their dyno plots (I borrowed from their threads). Same tuner and same dyno. team23jordan has a full turboback plus coated MR headers with integrated up. shralp almost has a full turboback but he has the stock mufflers (Perrin mid and Y-pipe) and a perrin uppipe instead of headers. You can see that the power range below 4000 rpm is almost identical. However, team23jordan has a tiny bit better spool. The big differences are only in the top end. However, it is unclear whether or not the power gain in the top end is from the mufflers or headers. team23jordan's plot http://i141.photobucket.com/albums/r69/mickeyd2005/openandclosed-trimmed.jpg shralp's plot http://i141.photobucket.com/albums/r69/mickeyd2005/dyno20plot3.jpg Link to comment Share on other sites More sharing options...
jim1969 Posted February 3, 2007 Share Posted February 3, 2007 I've heard that headers help top end. Link to comment Share on other sites More sharing options...
robsontuning Posted February 3, 2007 Share Posted February 3, 2007 I've heard that headers help top end. most headers benefit top end more than anything else. Link to comment Share on other sites More sharing options...
turbo2nr Posted February 3, 2007 Share Posted February 3, 2007 Does he really have a 140HP drop in the upper range? Link to comment Share on other sites More sharing options...
mickeyd2005 Posted February 3, 2007 Share Posted February 3, 2007 ^^^ I don't understand. The right is torque and the left is hp. The two charts are top and bottom. I think it's a fair comparison. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted February 3, 2007 Share Posted February 3, 2007 In this thread here: http://www.legacygt.com/forums/showthread.php?t=42588&highlight=catback+dyno Boostjunkie showed approximately 10 to 15 hp gain between the stock catback and MR CBE in the top end. Granted that's a completely different setup so it's not a fair comparison but gives an idea of the benefit of the mufflers. I've also seen the header comparison on NASIOC which showed very little gain for just headers alone. it appears that headers plus full turboback gives a sizeable increase in topend power. Link to comment Share on other sites More sharing options...
jim1969 Posted February 3, 2007 Share Posted February 3, 2007 the header comparision on Nasioc did show gains for headers. That comparison was without any tuning. http://forums.nasioc.com/forums/showthread.php?t=996366&highlight=header A tuned setup with headers will gain power. Link to comment Share on other sites More sharing options...
edkwon Posted February 3, 2007 Author Share Posted February 3, 2007 Im not that concerned with maxing out top end numbers for biggest e-penis bragging rights, i want minimum sacrifice to low end torque and power. Ed Link to comment Share on other sites More sharing options...
wukindada Posted February 4, 2007 Share Posted February 4, 2007 Simply put.......get a good quality aftermarket header & you will be satisfied!!!!!! You do need a touch up tune to get the most out of them though....... Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
FourMoBro Posted February 4, 2007 Share Posted February 4, 2007 Lets say i have a stg II modded car with aftermarket turboback exhaust, catless uppipe and ECU retune and get pretty good gains in power, are aftermarket headers really worth it in terms of power gains, noise and heat efficiency if i am just doing daily driving and no dedicated track work? Ed I guess it really depends if the headers are equal length or not. Perrin's claim +20/20 at 3K, which doesn't seem like the top end to me. I have a set arriving on tuesday. It gives me a chance to see if the leak I am hearing after my uppipe install is on that side of the turbo! After installing that, its just a CAI and trip down to Portland for a tune/dyno. Link to comment Share on other sites More sharing options...
PhilT Posted February 4, 2007 Share Posted February 4, 2007 You will notice the difference right off the bat, and a tune will only get more from them. Double Award Winning Legacy GT Wagon Link to comment Share on other sites More sharing options...
johnAWD Posted February 4, 2007 Share Posted February 4, 2007 More flow is always a good thing. Link to comment Share on other sites More sharing options...
PGT Posted February 4, 2007 Share Posted February 4, 2007 Im not that concerned with maxing out top end numbers for biggest e-penis bragging rights, i want minimum sacrifice to low end torque and power. Ed then P&P the OEM cast iron elbows and add a better crosspipe (like the kit PL-Tek sells). I found that with the addition of GTSpec headers (now on PhilT's car) and an updated e-tune (TDC STGII to STGII+), there was better low-end spool and power up top didn't fall off as quickly. No downsides, except I had to ditch my SSI skidplate. Link to comment Share on other sites More sharing options...
PhilT Posted February 4, 2007 Share Posted February 4, 2007 then P&P the OEM cast iron elbows and add a better crosspipe (like the kit PL-Tek sells). I found that with the addition of GTSpec headers (now on PhilT's car) and an updated e-tune (TDC STGII to STGII+), there was better low-end spool and power up top didn't fall off as quickly. No downsides, except I had to ditch my SSI skidplate. The skidplate doesn't fit with the headers ? Dang, that was going to be my next mod in the Spring Double Award Winning Legacy GT Wagon Link to comment Share on other sites More sharing options...
wukindada Posted February 4, 2007 Share Posted February 4, 2007 Fits just fine with the GReddy;) Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
PGT Posted February 4, 2007 Share Posted February 4, 2007 The skidplate doesn't fit with the headers ? Dang, that was going to be my next mod in the Spring you could make it fit Link to comment Share on other sites More sharing options...
edkwon Posted February 4, 2007 Author Share Posted February 4, 2007 Ive heard of those undertray clearance issues, i want to retain my plastic one, im looking at the megan racing ceramic coated headers, hopefully they'll clear. Ed Link to comment Share on other sites More sharing options...
mickeyd2005 Posted February 4, 2007 Share Posted February 4, 2007 The MR headers will burn the stock undertray. A local member has a coated one and it burned his tray. You can coat it and then put a thermal blanket between the tray and where it contacts (near the oil filler door). If you ask boostjunkie, he'll tell you where it makes contact. Link to comment Share on other sites More sharing options...
Deer Killer Posted February 4, 2007 Share Posted February 4, 2007 thermal blanket = corrosion.. especially tucked against the undertray. This is not a good solution. Link to comment Share on other sites More sharing options...
Mines Posted February 4, 2007 Share Posted February 4, 2007 then P&P the OEM cast iron elbows and add a better crosspipe (like the kit PL-Tek sells). I found that with the addition of GTSpec headers (now on PhilT's car) and an updated e-tune (TDC STGII to STGII+), there was better low-end spool and power up top didn't fall off as quickly. No downsides, except I had to ditch my SSI skidplate. Send them to Crucial Racing. I highly recommend them. They have the best customer service. It takes time, but for me, well worth the wait. Link to comment Share on other sites More sharing options...
edkwon Posted February 5, 2007 Author Share Posted February 5, 2007 Any brands that dont make contact with the factory undertray at all? Ed Link to comment Share on other sites More sharing options...
Puckman Posted February 5, 2007 Share Posted February 5, 2007 or the SSI Skidplate for that matter? Link to comment Share on other sites More sharing options...
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