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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,126
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Retro-question regarding dividing undivided headers
What is the dimensions/width of the 'divider' in a T4 flanged, divided header?
I put in 3/8" plate in mine but want to make sure that it is not supposed to be narrower choking top-end horsepower. Here is the before and after (2nd is iPhone pic):  
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood  , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
Last edited by Tippy; 12-30-2010 at 06:21 AM.. |
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12-30-2010, 06:18 AM
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7.0:1 > 11.3:1 > 7.0:1
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It sounds like don't have your turbocharger yet. The port shape varies between Turbonetics, Garrett etc. Since you have plenty of meat in your divider you can do a nice job and port match your header and your turbine inlet.
This is Turbonetics T4 split: 
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12-30-2010, 06:57 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,126
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Yep, don't have one yet. Thought the dimension would be universal.
Thanks! |
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12-30-2010, 07:16 AM
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Registered
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I was always under the impression that they were universal- but like Jim said- would make for some nice port matching...
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Kris @ Tech9 86' 930/GT-40R Sold  94' Rustang GT daily (long gone) 2008 C6/Z51 Corvette |
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01-02-2011, 10:29 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,126
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Yeah, very true
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01-03-2011, 08:25 AM
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1970 
1972 6 conversion 
1972 Datsun 510 
1986 
2002 Porsche 996TT
