A bit disappointed! - Engines Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: A bit disappointed!

smegal

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Post #1

I got my SC-6 rolling roaded today. I was expecting a bit more ponies than this. They did say their dyno gives lower results than most but I think that is too low. If anyone has a magnex they gould lend me for a day or two PM me please Whistle

As you can see from the AFR vs Boost graph it is fuelling fine, maybe a little lean at higher revs but not too bad.

Scoobyclinic were great and I would recommend them.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:28

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scott.n

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Registered: 16 Feb 2010

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Post #2

That a low boost setup ? whats the spec ?

Posted 24th Feb 2010 at 17:18

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smegal

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Post #3

Low boost.

So all the standard lynx low boost gubbins.
Magnex Decat and Jetex exhaust.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:20

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scott.n

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Post #4

That not a good gain over standard then ? 60 Bhp up on standard ? what do low boosted ones usually run ?? still an impressive figure mate

Posted 24th Feb 2010 at 17:25

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marco gti6

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Post #5

O_o??? Well, i was planning in low boosting my 6 in the next year but I would expect at least 250hp. So it might be wiser to go directly HighBoost. Has your 6 been done by rich and Lynx or did you charged it yourself??

Posted 24th Feb 2010 at 17:25

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smegal

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Post #6

It was done directly by lynx. I was expecting closer to 250-260 if I'm honest. I reckon my exhaust will be sapping a few ponies but surely not that many.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:27

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smegal

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Post #7

scott.n wrote:

That not a good gain over standard then ? 60 Bhp up on standard ? what do low boosted ones usually run ?? still an impressive figure mate

The conversion cost me

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:27

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marco gti6

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Post #8

That's weird in fact. I was also expecting 260 bhp with the LowBoost setup. When low boosting, there is no need to upgrade the engine's internals, is there???

Posted 24th Feb 2010 at 17:29

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scott.n

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Post #9

You would be surprised , a good free flowing exhaust will benefit , im used to Corsa's with C20 Let's and with say a standard system for a corsa ( aftermarket ) just wasnt big enough for the extra power , getting a custom one certainly free'd things up and some more power ! . Dunno how things go in the world of boosted 6's though exhaust wise.

Posted 24th Feb 2010 at 17:30

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smegal

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Post #10

marco gti6 wrote:

That's weird in fact. I was also expecting 260 bhp with the LowBoost setup. When low boosting, there is no need to upgrade the engine's internals, is there???

No, it uses all the standard internals.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:30

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scott.n

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Post #11

How much boost are you running on the low boost set up ? maybe have a word with the ppl who done the conversion and they will shed some light on it ?

Posted 24th Feb 2010 at 17:32

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smegal

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Post #12

It's making about 7psi which is about right from what I can gather. Hopefully Rich or someone will shed some light on things.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:33

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marco gti6

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Post #13

Hey smegal, as is raed in your signature, you financed you lowboost with a student loan?? Respect mate. Whish I could do the same this year.... what are you studying, if you don't mind me asking???

Posted 24th Feb 2010 at 17:33

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smegal

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Post #14

Mechanical Engineering. In my third year now, it has taken me the best part of a year to get all the parts together.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:36

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scott.n

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Post #15

smegal wrote:

It's making about 7psi which is about right from what I can gather. Hopefully Rich or someone will shed some light on things.

Yeah im sure they will do mate , what sort of bore is the current exhaust ?? again on C20 Lets you generally had to run anything from 2 ½" to 3" depending on spec to get the best out of the exhaust.

Posted 24th Feb 2010 at 17:37

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smegal

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Post #16

It's currently 2 ½" but has quite large silencers and a baffled backbox. So i'm pointing the finger at this at the moment. I may buy some pipe, bends and boxes and make one up to save moeny and test that.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:40

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marco gti6

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Post #17

That's cool mate!!! I'm in my first year (from 5) for translator/interpreter. These whole 6 Supercharging storyes on the forum are drivin me nuts.... Would so much like to charge mine right away.... but hey.... can't have everything. Just p*sses me off seeing my mates who already work driving their focus RS's, R32's and Clio sports. Sad

Would love to fly past them and their expensive new cars in a Carged six.

Posted 24th Feb 2010 at 17:44

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scott.n

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Post #18

YEah could be the culprat restricting it slightly , i used to run a staright through from the turbo to a back box but was baffled enough not to be too loud but not restrictive at the same time , sounded immense on 16 psi of boost !

Certainly liking the idea of a S/C conversion though . Going by what your saying you get good gains just for low boost set up with no aftermarket cams,pistons, rods etc...

Posted 24th Feb 2010 at 17:44

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barry.rs

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Post #19

Based on the calculation that BHP = torque x rpm / 5252 your bhp figure would be around 270.

Personally i would suggest it has more to do with the rolling road calculations rather than there being anything wrong with the setup.

Posted 24th Feb 2010 at 17:46

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smegal

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Post #20

marco gti6 wrote:

Would love to fly past them and their expensive new cars in a Carged six.

If you slowly accumulate the bits it isn't too bad. I tried to buy second hand wherever possible. I haven't really played with much yet but it should leave standard examples of the above behind.

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 17:57

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marco gti6

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Post #21

Well, at leas you're an example that it's possible to drive a sc'd 6 and be a student. Anyway good luck in finding out what's the mater with the ponnies Thumbs up

Posted 24th Feb 2010 at 18:02

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rallyestyle

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Post #22

So is yours the same as mine apart from the exhaust setup craig?

Normally its the intercooler setup that restricts the bhp output but i think you have the same size as me?

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Just Drive It

Posted 24th Feb 2010 at 18:03

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smegal

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Post #23

I have the small forge IC and 2" pipework, the boost pipe to the manifold was cold to the touch so the IC is cooling adequately. They did say the bends in the boost pipes will cause restriction at such low boost though. Do you have any rolling road graphs?

My curves seem alright they just go too low Sad

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 18:09

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tubbyrutter

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Post #24

Is that chart at the wheel?

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Posted 24th Feb 2010 at 18:15

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smegal

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Post #25

The top is at the fly (229.7) the other is the atw (191.8).

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Ex SC-6

Now in a Megane R26

Posted 24th Feb 2010 at 18:22

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