LBSC vs Standard - Dyno outputs - General Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: LBSC vs Standard - Dyno outputs

tvrfan007

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Post #1

Hi all,

When perusing on another forum I came across the following.

quote:

i know i sound like a broken record with this but its like the eaton 6's vs the low boost Lynx 6's. Yeah the Lynx kit has more power but what use is it when its making less than standard power until about 5k and only makes a great improvement over standard at 6k+? To me, thats not all that drivable and so i would rather have 30hp less but with peak torque at a little under 4500rpm.

Now, being brutally honest I only fitted a Rotrex kit as it fell into my lap helping a friend to recover some cash from his car. I never spent much time researching the power as i'd driven his car with the kit on and was plenty happy with the driveability. I did come from a tapping engine admittedly.

Does anyone have any standard or LBSC power curves to compare? Clearly there'll be RR differences but i'm only looking for indicative, as the above seems surprising to say the least when looking at an LBSC plot.

I see one for the low boost from Lynx's site:

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Posted 1st Dec 2015 at 13:15

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aaron6

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Post #2

Here's my standard one done a fee months back at kap tuning

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Posted 1st Dec 2015 at 13:22

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honestly3k

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Post #3

Heres my standard, torque dropped off prematurely but i suspect thats down to leaky exhaust/sensor/speed sensor at the time

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Posted 1st Dec 2015 at 13:47

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phillipm

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Post #4

You should have more torque pretty much everywhere to be honest, just probably not enough to notice until ~2.5/3krpm

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Posted 1st Dec 2015 at 13:59

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honestly3k

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Post #5

phillipm wrote:

You should have more torque pretty much everywhere to be honest, just probably not enough to notice until ~2.5/3krpm

I'm pretty convinced she wasnt running right at the time anywhooo, I miss her (shes in car heaven now) LOL

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Posted 1st Dec 2015 at 14:03

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phillipm

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Post #6

I meant a low boost vs stock Razz

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Posted 1st Dec 2015 at 14:14

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cully

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Post #7

Stg1 HDI with 3 different maps back to back Razz

Posted 1st Dec 2015 at 14:39

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aaron6

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Post #8

honestly3k wrote:

Heres my standard, torque dropped off prematurely but i suspect thats down to leaky exhaust/sensor/speed sensor at the time

Your horsepower and torque are identical to mine pretty much, yours don't look quite so smooth though, I wonder why.

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Posted 1st Dec 2015 at 14:47

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phillipm

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Post #9

Software/Inertial smoothing on the dyno.

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Posted 1st Dec 2015 at 17:13

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rich_w

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Post #10

The quote in the first post is complete bulls**t - I have previously done an analysis of stock vs. LBSC vs. HBSC at 1,000 RPM intervals from dyno plots - I will see if I can find it.

There is more power and torque all over the RPM band.

Given the LBSC engine is stock internally, how can it make less power than stock at any point in the RPM range, if the engine is aspirated by air at a pressure above atmospheric pressure?

The chap is basically saying the S/C causes a restriction until 5k RPM :S

Gotta love the internet!

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Posted 1st Dec 2015 at 17:28

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rich_w

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Post #11

Take a look at the LBSC plot - it makes stock BHP (167) at around 4,500 RPM, and is climbing steeply.

honestly3ks stock plot is making 115 BHP at 4,500 RPM.

Razz

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Posted 1st Dec 2015 at 17:31

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rich_w

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Post #12

LBSC torque is 200 lb/ft at 4,500 RPM.

Stock torque is around 136 lb/ft at 4,500 RPM.

A HUGE difference.

Smile

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Posted 1st Dec 2015 at 17:34

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rallyeash

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Post #13

rich_w wrote:

Take a look at the LBSC plot - it makes stock BHP (167) at around 4,500 RPM, and is climbing steeply.

honestly3ks stock plot is making 115 BHP at 4,500 RPM.

Razz

So does an NA engine on bodies and cams..

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Posted 1st Dec 2015 at 18:56

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phillipm

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Post #14

rich_w wrote:

Gotta love the internet!

I wouldn't worry about it, I've been trying to explain to the diesel lot that their torsion bar rear end is independent and not a torsion beam for about 3 years, it's like trying to hammer a nail into fog.

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Posted 1st Dec 2015 at 19:06

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tvrfan007

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Post #15

rich_w wrote:

Given the LBSC engine is stock internally, how can it make less power than stock at any point in the RPM range, if the engine is aspirated by air at a pressure above atmospheric pressure?

Lol Rich. This was my train of thought, I was finding myself thinking it was very noticeable! Always nice to see factual evidence, it had occurred to me I hadn't seen any comparisons but figured you would've done it. Smile

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Posted 1st Dec 2015 at 19:26

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roland rat

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Post #16

S/C 306's are s**t

/thread Wink

Posted 1st Dec 2015 at 22:05

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tvrfan007

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Post #17

S/c rallye ftw I agree. Smile

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Posted 1st Dec 2015 at 20:53

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roland rat

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Post #18

^^EFA

Posted 1st Dec 2015 at 22:05

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armzsc6

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Post #19

rich_w wrote:

LBSC torque is 200 lb/ft at 4,500 RPM.

Stock torque is around 136 lb/ft at 4,500 RPM.

A HUGE difference.

Smile

This.....

How can it possibly make less power at any point with constant forced induction rather than turbo spooling and more fuel to match.... mine has made just under 260bhp and just over 200 ftlb on 3 different rolling roads now. A standard 6 wouldn't keep up of I was short shifting like a girl lol

Rich what sort of torque figures do high boost make? I know it will never be close to turbo torque but never seen high boost graphs.

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Posted 2nd Dec 2015 at 10:31

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stan_306gti6 Forum Admin

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Post #20

I'm not sure about a high boost Pete, but my super high boost makes just short of 320ft/lbs.

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Posted 2nd Dec 2015 at 11:28

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rikky 🦔

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Post #21

phillipm wrote:

it's like trying to hammer a nail into fog.

saved to "quotes.txt"

thanks

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Posted 2nd Dec 2015 at 11:33

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phillipm

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Post #22

My licensing rates are good.

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Posted 2nd Dec 2015 at 12:53

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aaron6

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Post #23

In my experience against low boost ones, 1st and 2nd are similar to a normal one. Faster, but not rediculous. 3rd and up is where they really shine. There then is no comparison.

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Posted 2nd Dec 2015 at 14:25

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rikky 🦔

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Post #24

my hdi narrowly beat a LBSC 6 the other day

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Posted 2nd Dec 2015 at 14:35

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aaron6

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Post #25

Hdi's are real weapons. No smoke, no poke and all that.

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Posted 2nd Dec 2015 at 15:04

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