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| Author | Subject: Modified inlet manifold (Now fitted) |
 harry bo
Regular  Location: Croydon Registered: 15 Oct 2007 Posts: 101 Status: Offline |
Post #51
Apologies if this is a silly question, but why did Peugeot put the trumpets in if performance is improved by smoothing it?  Great work btw, you must be very patient to do all that! HB ________________________________________ It's Blaze and I like it |
 Posted 8th Oct 2008 at 03:35
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #52
I guess they were looking for allround performance (good driveability at low/medium revs) whereas I'm more interested in top end power in my car. Plus mass produced castings are always rough as standard and almost always benefit from a little dressing with a grinder! ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 8th Oct 2008 at 03:41
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harry bo
Regular Location: Croydon Registered: 15 Oct 2007 Posts: 101 Status: Offline |
Post #53
Fair enough, that makes sense. I'm with you on the top end... life begins at 4k  HB ________________________________________ It's Blaze and I like it |
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Posted 8th Oct 2008 at 03:48
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birk
Seasoned Pro  Location: Doncaster Registered: 24 Oct 2005 Posts: 7,032 Status: Offline |
Post #54
Im eagerly awaiting the results of this.________________________________________ Dimma + Gt35 turbo = Solid rear beam mounts £130 07889376885 Dan |
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Posted 8th Oct 2008 at 04:20
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phillipm
Seasoned Pro  Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline |
Post #55
harry bo wrote: Fair enough, that makes sense. I'm with you on the top end... life begins at 7k HB Fixed! ________________________________________ - 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 8th Oct 2008 at 04:22
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #56
Not going to be too conclusive I'm afraid Birk as my car has never been on the rollers. Just going to have to see what it feels like after I suppose as I'm unwilling to do two trips to the dyno to tell for sure. Bound to be better though even if just marginally. And its not like its cost me anything (except my time) ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 8th Oct 2008 at 04:24
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petegti6
Seasoned Pro  Location: Solihull & Market Harborough Registered: 09 May 2006 Posts: 12,046 Status: Offline |
Post #57
You doing anything else to go with, cams and remap would be a good option here ________________________________________ Cress87 wrote: This place is getting beyond a joke. There's been an enormous influx of bellends signing up recently Team 205 1.9 GTi ™ Team: Hmm™ |
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Posted 8th Oct 2008 at 04:36
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birk
Seasoned Pro Location: Doncaster Registered: 24 Oct 2005 Posts: 7,032 Status: Offline |
Post #58
Tis true... i might get this done myself and stick it on rollers, standard wise, then change it quickly and see if it helps ________________________________________ Dimma + Gt35 turbo =Solid rear beam mounts £130 07889376885 Dan |
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Posted 8th Oct 2008 at 04:38
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #59
Thats all planned for the future, been on a bit of a spending spree with Rich W lately, so cams and a re-map are on hold for the time bieng. Hopefully though it will have lightened flywheel and crankshaft pulley, PT82s and a ported throttle body. Thats what I'm aiming for anyway. ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 8th Oct 2008 at 04:40
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #60
If I was going to do this again I would cut the manifold much closer to the runners, this would leave me with way laee trumpet to remove with the grinder. Keeping both me, and my neighbours happy ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 8th Oct 2008 at 04:44
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306andy
Senior User  Location: Derby Registered: 01 Dec 2007 Posts: 631 Status: Offline |
Post #61
I finished off the manifold tonight, well as far as could with the tools at home. Its down to a bare minimum inside there and each port has been fully smoothed, enlarged and "tapered" out a bit. I also grinded off the lumps left by those "connecting/support" rods (2 of) that were in there. Its being welded tomorrow finally  by some nuclear engineering company  To be perfectly honest, i see this manifold as a trail and error type-thing. Once fitted i'll see the results (if any) and from there i can get another one, and do things properly (i.e: not with an angle grinder  )________________________________________ TEAM 205 GTi-5TEAM Phase 1 GTi-6 xbox Live tag: SilverGTi6 |
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Posted 21st Oct 2008 at 17:11
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paul_gti6_uk
Seasoned Pro  Location: Southampton Registered: 21 Dec 2005 Posts: 1,380 Status: Offline |
Post #62
Do you know if they remove the trumpet tops in the BTCC ones? Just curoius as when I looked into changing things on one of my bikes just changing the height of the trumpet had an effect on the shape of the power curve. Do you think without them that the air shall flow into the engine smoothly enough?Would have been good to get a before and after run to see where you lose and gain with the work you have done. ________________________________________ China Blue 306GTI-6 Ph3 Team Now Bikeless  |
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Posted 8th Oct 2008 at 06:12
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306andy
Senior User Location: Derby Registered: 01 Dec 2007 Posts: 631 Status: Offline |
Post #63
It was 173hp on the rollers last time Paul. I'll re-roller it and let you know________________________________________ TEAM 205 GTi-5TEAM Phase 1 GTi-6 xbox Live tag: SilverGTi6 |
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Posted 8th Oct 2008 at 06:22
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gtisid
Seasoned Pro  Location: chelmsford Registered: 22 Mar 2003 Posts: 4,992 Status: Offline |
Post #64
paul_gti6_uk wrote: Do you know if they remove the trumpet tops in the BTCC ones? Just curoius as when I looked into changing things on one of my bikes just changing the height of the trumpet had an effect on the shape of the power curve. Do you think without them that the air shall flow into the engine smoothly enough? Would have been good to get a before and after run to see where you lose and gain with the work you have done. dont seem to suffer any probs with my one just pulls harder with it on   ________________________________________ puglessPhase 1 GTI 6 1996-1997 Subaru Impreza GB270 2007-2008 rare spiderman comics same day international courier |
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Posted 8th Oct 2008 at 18:50
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #65
Managed to progress the manifold a little more tonight, I need to get a long reach die-grinder for doing the runners but the plenum is almost there. Hopefully this will be on the car by the end of next week.   ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 11th Oct 2008 at 03:36
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birk
Seasoned Pro Location: Doncaster Registered: 24 Oct 2005 Posts: 7,032 Status: Offline |
Post #66
Looking good! how you guna get an even surface with the runners though, surely it would be quite hard, especially as they curve quite a bit, the grinder may get caught at some point.Wonder if ther would be a benefit by cutting the manifold runners down?  ________________________________________ Dimma + Gt35 turbo =Solid rear beam mounts £130 07889376885 Dan |
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Posted 11th Oct 2008 at 03:53
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #67
Not if you use extended burrs. Thought about cutting the runners, but there will be a step when you weld them back together no matter how careful you are. I'm sure it will be ok, and after all it can hardly be worse than it was! ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 18th Oct 2008 at 03:34
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gtisid
Seasoned Pro Location: chelmsford Registered: 22 Mar 2003 Posts: 4,992 Status: Offline |
Post #68
looks more like it in the manifold, that is what mine looks like inside, the photos dont really show mine up to well. think it maybe more polishing in the 4pipe s but it feels so much lighter than the standard one so i guess they maybe ported . the bores certainly look bigger. how long did that take you to getting it like that? if you got a few more i reckon you could get an exchange service going on these as a lot of people have asked about mine but 500 for the body and manifold porting is a lot for 18-20 hp and then mapping it aswell. from what i can see there it looks as good as a longmans one , so once you had some rolling road figures and a bargain price you could be a busy man as it is a third of the price of throttle bodies and only a few hp difference if it mapps well. also worth a set of verniers as when wayne mapped my car once he had sorted the fuelling the extra gains he made by adjusting the pullies was amazing. i only have OE pullies so should i ever rework the head with better cams and solid lifters i will definately get adjustable verniers. unfortunately my timing was set back to standard settings after having to having a new cam carrier fitted. still made around 205 hp thoughon a more recent power run and i havent had the pullies messed with since so there is more power in there just got to remap again with wayne chipwizards to get those horses out . ________________________________________ puglessPhase 1 GTI 6 1996-1997 Subaru Impreza GB270 2007-2008 rare spiderman comics same day international courier |
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Posted 12th Oct 2008 at 04:15
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #69
Yeah, still got a way to go on the runners, I got a PTFE gasket today and I'm going to offer it up tomorrow and see how much material I have to remove. In terms of time the first ine is taking a while cos my grinder is shot, but if i was to do another one I would cut it differently to save myself a lot of the roughing down of the trumpets. I'll work out a costing on the next one I do and see if it's feasible to do more of them for other people on here.________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 13th Oct 2008 at 00:00
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #70
Did you get yours back on yet Andy? And did it make much of a difference?________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 18th Oct 2008 at 03:35
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xsimoss
Regular  Location: SE London Registered: 27 Mar 2008 Posts: 171 Status: Offline |
Post #71
gtisid wrote: what happened to the other fella that cut his open and went to town on it? he sounded like he was going to do the whole thing with chopping the trumpets off and polishing it but he hasnt been on here for ages. you can expect to see 18-20 hp out of this mod if done properly. i have a longmans one on mine and it is the best mod i have by far Might off been me mate. I did this to mine. The car feels like it revs better and feels better round the track, but when we rolling roaded it it was 2 bhp down and 10 torques down. Having said that it was 2 different rolling roads. ________________________________________ Gti6 running gear, Pug performance inlet cam, 4-1 ex/man, Modified in/man, decat, Magnex centre/back, cone air filter, AVO Coilovers, EBC grooved discs and mintex 1155s, stripped out interior, Oil Cooler, 17" rotasBUY IT, WRECK IT, BIN IT! |
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Posted 18th Oct 2008 at 05:25
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xsimoss
Regular Location: SE London Registered: 27 Mar 2008 Posts: 171 Status: Offline |
Post #72
Heres the threadhttp://www.306gti6.com/forum/showthread.php?id=88905&page=last xsimoss has attached the following image: ________________________________________ Gti6 running gear, Pug performance inlet cam, 4-1 ex/man, Modified in/man, decat, Magnex centre/back, cone air filter, AVO Coilovers, EBC grooved discs and mintex 1155s, stripped out interior, Oil Cooler, 17" rotasBUY IT, WRECK IT, BIN IT! |
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Posted 18th Oct 2008 at 05:34
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306andy
Senior User Location: Derby Registered: 01 Dec 2007 Posts: 631 Status: Offline |
Post #73
Nah still not got mine on yet Daveyboy...i'm a lazy git you see It will be going on soon, hopefully monday ________________________________________ TEAM 205 GTi-5TEAM Phase 1 GTi-6 xbox Live tag: SilverGTi6 |
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Posted 18th Oct 2008 at 18:41
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #74
Thats not good Moss, are you going to take it back off and re-fit a standard one now? Hope mine doesnt do the same, I will be enlarging the runners too, did you do that as well?________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 19th Oct 2008 at 15:28
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xsimoss
Regular Location: SE London Registered: 27 Mar 2008 Posts: 171 Status: Offline |
Post #75
daveyboy wrote: Thats not good Moss, are you going to take it back off and re-fit a standard one now? Hope mine doesnt do the same, I will be enlarging the runners too, did you do that as well? By runners do you mean the 4 ports off the main plunum chamber, if so, no we just left those with the std bore. We just wanted to see what effect removing the trumpets would have. I'm tempted to put the std manifold back on and take it back to the rolling road place, but it feels like it revs better up the top end, and for what we use the car for its a good thing (and it sounds awesome). Will let you know if I ever put the std manifold back on, but no time at the mo as all the time is being spent stripping the car out, lol. Having said all that its looks like you have done a REALLY good job on the manifold so hope you see some gains. ________________________________________ Gti6 running gear, Pug performance inlet cam, 4-1 ex/man, Modified in/man, decat, Magnex centre/back, cone air filter, AVO Coilovers, EBC grooved discs and mintex 1155s, stripped out interior, Oil Cooler, 17" rotasBUY IT, WRECK IT, BIN IT! |
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Posted 19th Oct 2008 at 16:23
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