eHoward Posted August 21, 2005 Share Posted August 21, 2005 One has nothing to do with the other. Compressor efficiency is based on the pressure levels and CFM. So by lowering EGT we have the potential to boost more before we leave the turbo's optimal efficiency range? Link to comment Share on other sites More sharing options...
firedawgs Posted August 21, 2005 Author Share Posted August 21, 2005 Don't they have coated headers and up-pipe now? Also, I never realized their up-pipe was such a change in diameter compared to the stocker. That must hurt spool-up a bit since the velocity drops compared to stock... I don't think they loose velocity since they are bigger. They are called "velocity headers" because they have a design inside to help speed the velocity up. I am not a technical mechanic for desighn, but I know that the boost really did not drop. Updated my vBGarage: Link to comment Share on other sites More sharing options...
wukindada Posted August 21, 2005 Share Posted August 21, 2005 I was ready to purchase the headers until I found out the headers will not work with my brand new COBB UP:( I was told the Maddad header must be used with the Maddad UP.. Any suggestions for a Un-equal header that I can use with my COBB UP? Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
firedawgs Posted August 21, 2005 Author Share Posted August 21, 2005 You already have the Cobb Uppipe?. What does the bottom flange look like 2 or 3 bolts? Updated my vBGarage: Link to comment Share on other sites More sharing options...
wukindada Posted August 22, 2005 Share Posted August 22, 2005 (2) Toyota 6EATS .........SUCK!!!!!! Link to comment Share on other sites More sharing options...
automaticsti Posted August 3, 2006 Share Posted August 3, 2006 By the way its MitsubOshi Link to comment Share on other sites More sharing options...
EuroArek Posted February 22, 2009 Share Posted February 22, 2009 Like to know if the Megan Racing headers including Up Pipe from ebay are good ??? Link to comment Share on other sites More sharing options...
caramall2 Posted April 25, 2009 Share Posted April 25, 2009 To be fair, my MR headers were ceramic coated which now they don't recommend, but mine did crack at the collector (I purchased them a few years back, but just put them on about a year ago). Again, maybe they'll be ok without the coating. Honestly, I think I'm going back to stock manifold (getting Grimmspeed port and polish) just so I don't have to worry about cracking. Trading a little performance for maintainability. Link to comment Share on other sites More sharing options...
lkailburn Posted May 2, 2009 Share Posted May 2, 2009 I don't think they loose velocity since they are bigger. They are called "velocity headers" because they have a design inside to help speed the velocity up. I am not a technical mechanic for desighn, but I know that the boost really did not drop. i think you meant to say the header has velocity stack(s) in it. velocity stacks help prevent air flowing in the wrong direction. they don't speed up the velocity persay, they just ensure that the air continues to move in the correct direction which would result in faster spool or faster exit depending on which application we are talking about. nice pics though thank you for sharing. did you say you were giong to post up a full review on it somewhere? -Luke Link to comment Share on other sites More sharing options...
caramall2 Posted May 10, 2009 Share Posted May 10, 2009 Hey, if any of you guys are around, how in the world do you get the two UP to turbo nuts off that are basically under the turbo/coolant lines? I can get a short box end wrench on one, but it's stripping/rounding off the nut (can only get the open end on it). The other nut is virtually completely under the coolant lines and shaft of the turbo...can't get anything in there. Ideas? Link to comment Share on other sites More sharing options...
LittleBlueGT Posted May 11, 2009 Share Posted May 11, 2009 I had to take the coolant line off to get to my turbo to UP bolts. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
caramall2 Posted May 12, 2009 Share Posted May 12, 2009 That's what I finally did. Hated to see all my brand new coolant on the floor, but that's the breaks :-0 Just want to get this thing on the road! Link to comment Share on other sites More sharing options...
TravisGT Posted December 16, 2009 Share Posted December 16, 2009 The rod running down the center is for shipping purposes. You take it off before installing the headers. Link to comment Share on other sites More sharing options...
RIPjeep2002 Posted December 19, 2009 Share Posted December 19, 2009 Any sound bites? Link to comment Share on other sites More sharing options...
m sprank Posted December 19, 2009 Share Posted December 19, 2009 You guys realize your bumping a thread that was started like 3-4 years ago right? No one is going to respond anymore. The Megan headers are crap. You can buy headers that are just as good on eBay for $80. Ported and polished stockers are the best for reliability. All aftermarket headers crack after time. In my reading Perrin seem to last the longest (maybe 2-3 years). I have a set of Perrin, a set of eBay (M2) and a stock set going out for p&p (Grimmspeed) for when the Perrins die. The eBay set is back up just in case, or until I give them away. Link to comment Share on other sites More sharing options...
TravisGT Posted December 26, 2009 Share Posted December 26, 2009 Got you to read it. I just said something because nobody else did. I used it to make my decision on headers. Just because nobody responds doesn't mean people aren't reading it. Link to comment Share on other sites More sharing options...
m sprank Posted December 26, 2009 Share Posted December 26, 2009 Got you to read it. I just said something because nobody else did. I used it to make my decision on headers. Just because nobody responds doesn't mean people aren't reading it. I read it because I was subscribed, so it popped up in my subscriptions list. Notice, I was the only one to respond so far. Link to comment Share on other sites More sharing options...
jim1969 Posted December 26, 2009 Share Posted December 26, 2009 My mad dad headers cracked at the collector. Had them about 3 years. Link to comment Share on other sites More sharing options...
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