Not sure on Dyno results - Engines Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: Not sure on Dyno results

haywes

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Post #1

I had my 6 put on a dyno this morning to see what it was putting out, and wasn't sure on the results.

I've got Piper Fast road cams, and a piperX viper enclosed induction with a cold air feed, nothing major, but after 4 runs it's best was 160bhp (ATF). I'm not really clued up on how rapidly these things lose horses, and to what extent with age, but I felt like that was a bit on the low side considering? The engine has done a fair bit of mileage (116k).

I thought I'd ask and see if there was anything major that might be letting her down a bit? Or if this was pretty expected - I wasn't hugely optimistic because there's no heavy mods, nothing on there to work miracles LOL

but I at least hoped it'd be on stock power?

Any feedback? Cheers guys Smile

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Posted 7th Feb 2010 at 07:45

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roland rat

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Post #2

All depends on how the cams we fitted as there is usually no room for aftermarket cams in the 6 head unless they have been retarded.
Also without a re-map the cams are useless.

What rolling road did you use?

Posted 7th Feb 2010 at 04:23

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haywes

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Post #3

roland rat wrote:

Yeah, I thought that they'd be pretty useless without being remapped, and I don't think there's anything in the documents about any remaps or any modification to the head, so I wasn't counting on them to add to it much! Shame I had the pugsport swapped for a standard system recently, too. I know there wouldn't be much in the way of gain from the standard bhp, so I was pretty much just wondering if it's anything that I should/could look into? Or if it'd be something expected with this age/mileage engine.

I used the dyno at Torque of the devil in Uxbridge, which is a ""state of the art" 450 series Twin retarder 4wd dyno".

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Posted 7th Feb 2010 at 05:06

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haywes

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Post #4

Doesn't sound too bad though! Quality's not the best, mind

*Edit: was meant to edit previous post and add this in Roll eyes

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Posted 7th Feb 2010 at 05:23

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welshpug!

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Post #5

they're pretty good guys at TOTD, never used them myself but a few people on the 205gtidrivers forum and a few acquaintances in the VW beetle scene have done without any complaints.

did you get a printout?

what I would do firstly is find what the cams are exactly, what lift they're meant to be at TDC and what the peak lift angle should be.

then I'd check that you have a proper o.e cat or a decat on there, pattern cats are too small in my experience.

then if the cams are safe to be timed up at their specified lift I'd get the timing checked and adjusted as necessary, then try another dyno run.

and that's all only viable to do if its running right Smile

they dont lose BHP over time unless theyre worn out, I do believe miles's 250k + Phase 1 gti6 engine is still around factory 167 BHP.

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Posted 7th Feb 2010 at 16:30

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Rich E Forum Admin

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Post #6

Where was peak power and what and where was peak torque (at the wheels)?

ISTR it only has a mildly uprated inlet cam.

I've had a few blasts up the M1 with this car and been a passenger in it as well and it was pretty much on par with my decatted standard engine with a lightened flywheel.

ID the cam and find out its correct timing settings, check your timing and go from there.

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Posted 7th Feb 2010 at 17:00

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roland rat

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Post #7

Rich E wrote:

ISTR it only has a mildly uprated inlet cam.

I think your right im sure its just an inlet can from when me and Stu picked it up.

Posted 7th Feb 2010 at 17:08

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buzzbrightyear

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Post #8

sounds well on the dyno

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Posted 7th Feb 2010 at 17:12

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monty-69

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Post #9

I would only be looking into the wheel horse power figure, in which case the tyre pressures should have been checked at the very least. Around 140 at the wheels figure should equate to 167hp, unless it had wrong tyre pressures, brakes binding, treacle gearbox oil Crazy

Posted 7th Feb 2010 at 21:58

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cwspellowe

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Post #10

Mine's done 140k and RR'd at 175bhp with just a K&N and decat/straight through. Mileage shouldn't be an issue if it's been looked after.

Obviously there's variance can come into play, but as said if you timed the cams up properly and had a remap you'd see a fair few more horses

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Posted 7th Feb 2010 at 22:08

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haywes

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Post #11

roland rat wrote:

Rich E wrote:

ISTR it only has a mildly uprated inlet cam.

I think your right im sure its just an inlet can from when me and Stu picked it up.

Now you mention it, I'm pretty sure he did say it was the inlet cam. This is the one, shows all the info on duration, lift and timing etc:

Click for cams!

I haven't had a thorough look through the documents, but I will, but I'm pretty sure there's been no remap/timing etc, which is something to look into.

But with the PiperX viper with air feed, and just 160bhp, is this just a sign that the engine's getting a bit tired? Or is there something that could be causing it? I think another decat might be coming in to play again - just had my MOT so got a year!

Thanks for all your help so far guys Smile

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Posted 7th Feb 2010 at 22:15

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welshpug!

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Post #12

looks a safe enough and quite mild upgrade, hard to say as they don't state how much lift it has at 50 thou or 1/1.5mm, ask Piper that and you'd be able to compare it to others a little easier.

I'd check it is set to peak lift @ 110 degrees / 1.09mm lift @ TDC.

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Posted 7th Feb 2010 at 22:29

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haywes

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Post #13

Rich E wrote:

Max torque was 140lbs/ft at about 5000rpm (done in 3rd gear if it helps). Peak power was at about 6400rpm.

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Posted 7th Feb 2010 at 22:32

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haywes

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Post #14

welshpug! wrote:

Thanks mate, I'll make sure I look into that. Cheers for your help!

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Posted 7th Feb 2010 at 22:35

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justinaccurate

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Post #15

First time I rolling roaded mine was at a meet in Northampton. Everyone's car was basically standard apart from the odd exhaust. Mine made 155 (put it down to after-market cat), Clover's made 174 I think (had a skim due to HG failure) (the vid is not on youtube for some unknown reason)

Then the last rolling road mine got around 164, while there were other modded ones with mild cams and enclosed IKs that just broke 170...

Posted 7th Feb 2010 at 22:39

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adam b

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Post #16

I would be getting the cam timing checked and maybe it remapped. You've got less than standard torque, although I realise the dyno won't be entirely telling the truth.

Can you give us a proper picture of the graph? The figures aren't hugely helpful tbh - the shape of the curves is more important.

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Posted 7th Feb 2010 at 23:28

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haywes

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Post #17

adam b wrote:

Can you give us a proper picture of the graph? The figures aren't hugely helpful tbh - the shape of the curves is more important.

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Posted 8th Feb 2010 at 00:54

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monty-69

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Post #18

The flywheel figure is an estimate, what was it at the wheels?

Posted 8th Feb 2010 at 17:57

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adam b

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Post #19

monty-69 wrote:

The flywheel figure is an estimate, what was it at the wheels?

The whole thing is an estimate LOL

The curves don't look too bad tbh - no obvious cam timing issues. Might be worth getting them checked out first anyway.

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Posted 8th Feb 2010 at 18:05

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miles

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Post #20

They are known to read low, I know a cusomter of mine had a RR done locally to him at 200bhp and then there at around 180bhp with a new engine I had built which even he said was allot quicker than before, Take the figure's with a pinch of salt and unless your on a shoot out day etc then you have nothing to compare it against

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Posted 9th Feb 2010 at 03:01

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welshpug!

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Post #21

just a thought, did they check AFR? I know its not shown on the graph but they still might have kept an eye on it, got Powerstation to do this when I got my 205 RR'd last.

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Posted 9th Feb 2010 at 05:22

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