#811: Re: Project sleeper Author: Edward, Location: In the garagePosted: Wed Aug 01, 2012 5:44 am ---- Mine are fine. Quite stiff. Cant make them flex much by hand.
#812: Re: Project sleeper Author: spike_202, Location: West midsPosted: Wed Aug 01, 2012 2:08 pm ---- Iter the ones I have are like a Dimond shape and they arnt joins in the middle so alows side ways movement, going to stick it in the middle section and orderd 2 box shape ones like you have as they look like they are joins in the middle and more stiff.
#813: Re: Project sleeper Author: Edward, Location: In the garagePosted: Sat Aug 04, 2012 6:46 am ---- Took a video. The camera doesnt pick up the real sound of the bodies. They sound so much nicer than the video suggests. Love to hear what it sounds like on the outside.
youtu.be/Cn5on0ExmO4 Last edited by Edward on Sat Aug 04, 2012 8:55 am; edited 1 time in total
#814: Re: Project sleeper Author: Schumi, Location: Istanbul / TurkeyPosted: Sat Aug 04, 2012 8:37 am ---- Is this your car Edward ?
#815: Re: Project sleeper Author: Edward, Location: In the garagePosted: Sat Aug 04, 2012 8:55 am ---- Yes.
#816: Re: Project sleeper Author: Barking, Location: sarcasm-in-shedloadsPosted: Sat Aug 04, 2012 9:04 am ---- Fade to Grey the song - that (non-original) video is pants though
206 GTi sounds good too
#817: Re: Project sleeper Author: Schumi, Location: Istanbul / TurkeyPosted: Sun Aug 05, 2012 9:43 am ---- Is this full throttle video ? It's look not to fast. Sorry.
#818: Re: Project sleeper Author: Skittle, Location: North EnglandPosted: Sun Aug 05, 2012 10:45 am ---- Been reading this over a few days. What a lovely and well kept car. Wish mine was like this.
#819: Re: Project sleeper Author: Edward, Location: In the garagePosted: Sun Aug 05, 2012 10:55 am ---- It's full throttle from about 4.5k onwards. Thats the problem. The increased power output is now at a higher speed. So whereas before I might have had 140bhp at 6500rpm, I now have about 150bhp so I'm only 10bhp up on before at that point.
I dont have the same torque at 4k rpm either. I think it has less.
Any power increase is also at higher road speed which dampens the effect. i.e. the alleged 214bhp at 70mph in 2nd isn't going to work as well as if it was available at 55mph.
Overall it is faster but not by a massive margin.
So it needs the longer trumpets to increase the torque (apparently inlet length can have a dramatic impact on power delivery) and a shorter final drive to make the power available at lower speeds. This also brings the ratios closer together.
#820: Re: Project sleeper Author: Schumi, Location: Istanbul / TurkeyPosted: Mon Aug 06, 2012 4:15 pm ---- Longer trumpets defiantly what you need but longer trumpets also move your power graph to higher revs. I'm still thinking your fuel and ignition map so far from perfect. Do you have any log on WOT. I know you dont have wideband AFR but narrowband afr still give an idea with ignition advance.
#821: Re: Project sleeper Author: Edward, Location: In the garagePosted: Tue Aug 07, 2012 10:55 am ---- Longer trumpets are for lower revving engines, they dont push the power band higher. For the same reason the higher the revs the shorter the inlet needs to be.
#822: Re: Project sleeper Author: Schumi, Location: Istanbul / TurkeyPosted: Tue Aug 07, 2012 12:20 pm ---- There a balance between ITB system total lenght with engine RPM. If your system length shorter than your engines max RPM's required length. Then longer trumpets give you more torque and your torque graph goes higher. But If you overlength your system with to long trumpets then you need more revs. There is an expert in our country on ford race engines and he write a very long article about ITB lengths. If I find again on magazine i will translate as I can and write here. And there a little quote from Jenvey.
Quote::
Induction length is one of the most important aspects of fuelling performance engines.
In our experience an under-length system is the greatest cause of disapointment, with loss of up to 1/3 of power potential. There are a number of good books on the subject and the serious developer is referred to these and, in particular, dyno trials. A guide figure, from the face of the trumpet to the centre of the valve head is 350mm for a 9,000 RPM engine. Other RPM are proportional i.e. for 18,000 RPM the figure is approximately 175mm.
#823: Re: Project sleeper Author: Edward, Location: In the garagePosted: Tue Aug 07, 2012 1:31 pm ---- With 90mm trumpets (longest alloy ones available) my induction would be about 370mm. Looking at the Jenvey guidelines it needs to be about 430mm long.
I doubt anything longer would fit under the bonnet especially as the filter needs to be about 25mm from the entry to the inlet.
#824: Re: Project sleeper Author: spike_202, Location: West midsPosted: Tue Aug 07, 2012 1:34 pm ---- I'm sure I've seen 120mm alloy trumpets before.
#825: Re: Project sleeper Author: Edward, Location: In the garagePosted: Tue Aug 07, 2012 2:00 pm ---- Yes on 45mm bodies but there must be a limit to how long they can be to fit under the bonnet. They do 100mm carbon trumpets but they cost twice as much.
I wonder if 45mm trumpets can fit 42mm bodies...a little bit of grinder action on the entry to the throttle body...only 1.5mm each side...cant be too hard...
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the song - that (non-original) video is pants though 
