tag:blogger.com,1999:blog-10423822.post2585953537329103348..comments2023-09-07T15:07:55.593+02:00Comments on The Barry Scott Spitfire Tuning Blog "The Crazy Spitfire": Bits and bobs.David Powellhttp://www.blogger.com/profile/01605294122602158726noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-10423822.post-5471133472532015002007-03-16T04:52:00.000+01:002007-03-16T04:52:00.000+01:00Actually having had a decent look at the Turbo's, ...Actually having had a decent look at the Turbo's, never really used or rebuilt any of them! It's obvious the metal jet cover has a hole to blow boost into the top of the choke system, to match the pressure coming from the barrels via the choke feed holes in the lower choke area, as to equalise the pressure either side of the choke system, top and bottom, so it doesn't blow open under load:) <BR/><BR/>Thats it :)David Powellhttps://www.blogger.com/profile/01605294122602158726noreply@blogger.comtag:blogger.com,1999:blog-10423822.post-69691287647734962962007-02-27T23:57:00.000+01:002007-02-27T23:57:00.000+01:00Turbo has numerous differences. However you can us...Turbo has numerous differences. However you can use them on normally aspirated engines.<BR/><BR/>Firstly it has seals on the inside of each barrel to stop leakage from the spindle shaft. The outer spindle simply retains the normal bearing which is air tight anyway.<BR/><BR/>Also the progression hole caps have an O-ring seal. The venturi retaining screws are a different design and have a fibre washer under them.<BR/><BR/>The top jet cover is metal and not open to atmosphere as per normal. The fuel bowl and all internals are then sealed at the same pressure as the turbo boost/airbox. The hole in the jet cover feeds the choke with normal air pressure I believe or should do, as you don't want to boost the choke system! As it'll blow the choke open and throttle the engine with fuel.<BR/><BR/>Seems also some internal drillings are slightly larger to enable a greater flow rate.<BR/><BR/>The lead plugs are usually covered in epoxy so they don't blow out.<BR/><BR/>To use them on normal no turbo simply remove the metal jet covers, replace with open flowing plastic ones...<BR/><BR/>Thats about it :)David Powellhttps://www.blogger.com/profile/01605294122602158726noreply@blogger.comtag:blogger.com,1999:blog-10423822.post-594852426384102552007-02-24T02:33:00.000+01:002007-02-24T02:33:00.000+01:00What makes a DHLA turbo spec Dave?Is it just uprat...What makes a DHLA turbo spec Dave?<BR/>Is it just uprated seals etc??<BR/>Or is there more to it?Jimhttps://www.blogger.com/profile/01541791930988815720noreply@blogger.com