Re: Boost pressures and exhaust presssures

	Boost pressures and exhaust presssures February 02, 2014 10:06AM
hayes73 Registered: 08/23/2011 Posts: 48	What determines the difference between boost and the exhaust pressures thanks Reply Quote

	Re: Boost pressures and exhaust presssures February 02, 2014 11:45AM
kevind Registered: 05/29/2008 Posts: 161	Lots,be more specific. Reply Quote

	Re: Boost pressures and exhaust presssures February 02, 2014 11:56AM
hayes73 Registered: 08/23/2011 Posts: 48	My 3000rpm tractor always runs 8 to 12 pounds more exhaust pressure than boost cam at 96 degrees gt turbo heads flows 250 valves set at 12 ,14 fuel at 700 water 36 ounces exhaust temp 1520-1580 Edited 1 time(s). Last edit at 02/02/2014 12:38PM by hayes73. Reply Quote

	Re: Boost pressures and exhaust presssures February 02, 2014 12:52PM
Got air?	Buy a Hart's or Precision and you won't have that problem. Reply Quote

	Re: Boost pressures and exhaust presssures February 02, 2014 12:57PM
kevind Registered: 05/29/2008 Posts: 161	what are your pressures,I prefer my exhaust to be a little higher than intake. Reply Quote

	Re: Boost pressures and exhaust presssures February 02, 2014 01:44PM
hayes73 Registered: 08/23/2011 Posts: 48	Boost 65 exhaust 55 gt42 and the precision I have does the same pressures Reply Quote

	Re: Boost pressures and exhaust presssures February 04, 2014 01:11PM
kevind Registered: 05/29/2008 Posts: 161	what engine and manifolds? are you snuffing the turbo out? Reply Quote

	Re: Boost pressures and exhaust presssures February 05, 2014 01:05AM
Hotsmallblock Registered: 01/04/2010 Posts: 198	Sounds to like your spring pressure on your head isn't enough???? Is it a stock head?? If you don't have enough spring pressure Boost will just push the valve open and you Will never gain on it. Just a thought Reply Quote

	Re: Boost pressures and exhaust presssures February 05, 2014 02:58AM
Same here	I had the same problem , get you a hx60 and your boost will go way up Reply Quote

	Re: Boost pressures and exhaust presssures February 05, 2014 03:29AM
case fan	What kinds spring pressure should a person run for a 3k rpm. Reply Quote

	Re: Boost pressures and exhaust presssures February 07, 2014 12:56PM
kevind Registered: 05/29/2008 Posts: 161	What are your pressure's again? you said the exhaust runs higher but then you said boost was 65 and exh. was 55. Reply Quote

	Re: Boost pressures and exhaust presssures February 04, 2014 02:54PM
followme1086 Registered: 03/13/2009 Posts: 89	What exhaust housing on the GT? 115 probably or bigger? Reply Quote

	Re: Boost pressures and exhaust presssures February 05, 2014 11:52AM
hayes73 Registered: 08/23/2011 Posts: 48	101 Garett spring pressure 175 what kind exhaust housing for the hx60 at 3000 rpm can I run Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 10:32AM
Engine	If both turbos running the same boost , the turbo may not be your problem I would contact my engine builder Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 11:14AM
hillbiy harvester	If your boost is 65 and your ex is 55 I don't se how you make it down the track without chirping some, If its the opposite you need a bigger ex housing .And harts.precision hx60 don't mean nothing if its not matched to your eng the cam plays A big part Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 11:40AM
kevind Registered: 05/29/2008 Posts: 161	Spring pressure 175,,is that at max lift or seated. Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 12:41PM
hayes73 Registered: 08/23/2011 Posts: 48	Seat pressure Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 12:51PM
hayes73 Registered: 08/23/2011 Posts: 48	What is should the spring pressure be for plus head stock 466 3000 rpm thanks Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 01:19PM
kevind Registered: 05/29/2008 Posts: 161	Ok well spring pressure is not your problem. That's actually a lot for your rig,what is open pressure? do you have heavy push rods that are not deflecting. Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 01:24PM
hayes73 Registered: 08/23/2011 Posts: 48	Have chromoly push rods and roller cam from Eddie Ingram Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 01:37PM
kevind Registered: 05/29/2008 Posts: 161	ok what size turbo in-out Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 01:56PM
hayes73 Registered: 08/23/2011 Posts: 48	3x3 gt42 journal bearing 1.01 housing Reply Quote

	Re: Boost pressures and exhaust presssures March 02, 2014 02:27PM
kevind Registered: 05/29/2008 Posts: 161	Everything sounds good, put a tighter ex housing on and have fun.640 SF run a 3x3 so tighten up your ex. and you will be fine Reply Quote

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