Post #1
What exactly do (or did) Longmans do to the inlet? A brief search suggests they cut it open and alter the trumpets
Is this worth getting done to a road engine, say with PT81's?
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displaying posts 1 to 25 of 33
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| Author | Subject: Longmans inlet manifold |
 JWP EFi
Turbo Legend!  Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
A brief search suggests they cut it open and alter the trumpets Is this worth getting done to a road engine, say with PT81's? |
 Posted 17th Jan 2013 at 21:18
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bigbadbowen
Seasoned Pro  Location: Winchester Registered: 21 Nov 2003 Posts: 13,753 Status: Offline |
Post #2
Opened and removed the trumpets |
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Posted 17th Jan 2013 at 21:33
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #3
so realistically this could be done by any decent welder/fabricator?what benefit does it give and are there any down sides? |
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Posted 17th Jan 2013 at 21:38
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bigbadbowen
Seasoned Pro Location: Winchester Registered: 21 Nov 2003 Posts: 13,753 Status: Offline |
Post #4
Was done to increase airflow but they also ran standalone management so the map sensor was also removed and other sensors not needed. |
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Posted 17th Jan 2013 at 21:43
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #5
ok. so with mild-ish cams and remap, it wouldnt be worth it would it?Looking at ways to crack 200bhp N/A, 81's,pocketed pistons and map |
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Posted 17th Jan 2013 at 21:46
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eddy_gti6
Seasoned Pro  Location: Durham Registered: 20 Oct 2008 Posts: 8,716 Status: Offline |
Post #6
Wasnt this done and tested before and after mapping by someone on here? Sure i read about someone chopping the inlet open, chopping the trumpets off and welding it up and all he got was abit extra mid range? Not much benefits tho________________________________________ Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & = |
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Posted 17th Jan 2013 at 21:50
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #7
extra mid range would be good as long as there's no loss anywhere else |
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Posted 17th Jan 2013 at 21:52
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boost
Regular  Location: peterlee Registered: 22 Jun 2012 Posts: 245 Status: Offline |
Post #8
i heard when this is done with a new management system it can acheive more power than throttle boddies  ________________________________________ 97 1.6 xs gti6 conversion scrapped99 black rallye ( low miles and immaculate  ) soldnew owner of a 2001 diablo red hdi mile muncher swapped99 red rallye turbo sold then died  00 moonstone 1.9d (slow) |
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Posted 17th Jan 2013 at 21:52
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #9
if only it was as easy |
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Posted 17th Jan 2013 at 21:54
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bigbadbowen
Seasoned Pro Location: Winchester Registered: 21 Nov 2003 Posts: 13,753 Status: Offline |
Post #10
boost wrote: i heard when this is done with a new management system it can acheive more power than throttle boddies Yeah but you need a racing engine to go with it |
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Posted 17th Jan 2013 at 21:56
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #11
well said |
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Posted 17th Jan 2013 at 21:58
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clen666
Seasoned Pro  Location: Co. Durham Registered: 12 Feb 2009 Posts: 2,401 Status: Offline |
Post #12
That Dave bloke tried it. I think he lost a lot of midrange.Need a high revving engine to make the most of it ________________________________________ Team 'unintentional rat look' |
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Posted 17th Jan 2013 at 22:00
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boost
Regular Location: peterlee Registered: 22 Jun 2012 Posts: 245 Status: Offline |
Post #13
suppose youll see more gains running boost like ________________________________________ 97 1.6 xs gti6 conversion scrapped99 black rallye ( low miles and immaculate ) soldnew owner of a 2001 diablo red hdi mile muncher swapped99 red rallye turbo sold then died 00 moonstone 1.9d (slow) |
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Posted 17th Jan 2013 at 22:00
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #14
i doubt you'd need to do it if your running boost as engine is now - Forced inducted |
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Posted 17th Jan 2013 at 22:03
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eddy_gti6
Seasoned Pro Location: Durham Registered: 20 Oct 2008 Posts: 8,716 Status: Offline |
Post #15
click here________________________________________ Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & = |
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Posted 17th Jan 2013 at 22:05
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #16
that was an interesting read, seems its not worth doing unless your planning to go daft on other bits,cams, management, head work etc |
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Posted 17th Jan 2013 at 22:24
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gti6girl
Seasoned Pro  Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #17
I have a standard engine with a longmans inlet running on management and its 1/2 sec quicker than my other 205 on bodies down the quarter mileStill prefer the sound of bodies tho |
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Posted 17th Jan 2013 at 22:33
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #18
im guessing its quicker becuase the standard long runners aid torque, but wait a minute, their shorterif they've been de-trumpeted! this subject intrigues me |
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Posted 17th Jan 2013 at 22:37
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #19
Yeah there compleatly smooth inside with no trumpets |
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Posted 17th Jan 2013 at 22:40
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #20
how did it drive normally, ie other than caning it down the 1/4? loss in low to mid range torque? |
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Posted 17th Jan 2013 at 22:42
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phillipm
Seasoned Pro  Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline |
Post #21
Shorter inlet tract to match the cam specs. Probably wouldn't loose quite as much down low as Jim did with a hopped up cam too.________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM meEmail me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces. |
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Posted 17th Jan 2013 at 22:42
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #22
It's absolutely rapid. It really does pull like a train all the way through the rev range |
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Posted 17th Jan 2013 at 22:44
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #23
so, to summarise, unless cams are uprated then its a pointless move, yes/no?! |
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Posted 17th Jan 2013 at 22:45
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #24
gti6girl wrote: It's absolutely rapid. It really does pull like a train all the way through the rev range rest of engine totally standard? other than exhaust |
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Posted 17th Jan 2013 at 22:46
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
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Posted 17th Jan 2013 at 22:49
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