Dyno Graphs & Charts - Torque & Power Reference Library
 

Hi Guys,

Thought I'd throw an idea out there.....

Suggestion
How about a thread where everyone in our Pelican community might become interested in posting and sharing their respective engine's Dynamometer findings, via chart or graph? Of particular interest will be changes that occur via additions/deletions or mods.

Reason:
There seems to be an amazing number (1000s??) of posts where members are genuinely trying to get source information about gains/losses associated with engine configurations and modifications. However it is time consuming and sometimes difficult to obtain quantitative factual statistics. Seat of the pants assessments are OK, however they have little relevance as everyone's pants are different! :)

Eg: Do you get 10hp from a particular muffler or is it a myth? Does playing with cam timing give you Torque? does fuel ROM really change things? What does the dyno actually say???

You also detect frustrations from some of Pelican's technical experts who constantly advise people to put their cars on dynamometer before guessing gains. (or losses in some cases).

So how useful could a single thread be, that brings all results together in single place under 1 search?? (dyno)

We are all interested in how our motors are 'actually' performing, whether it's to improve our lap times, maximise efficiency of our std motor or know that we are getting value from a big spend.

This could make it easier to find results to help us all determine real world improvement from investments such as:

•Exhausts and mufflers
•Cams - different versions and cam timing
•Carburettors and fuel injection
•Compression ratios, Fuel Octanes/RONs and different brands
•Manifolding, Porting and cylinder heads
•Pistons
•Customising, mooning, boat-tailing, knike edging, etc...

There's heaps of others but you get the idea..


Positives:
•When someone has a question about the benefits to be gained from spending $, they can jump to this DYNO link and cruise the library. If is doesn't exist, they might want to undertake a dyno themselves and post their results?
•Over time, this has the potential to identify almost every permutation of engine config and mod, from 2L thru 3.5l, bog standard on low octane thru to unlimited $ and 100+ race fuel.

Notes:
All dyno results will vary between operator and workshop, however this is a fact of life and having some scientific backup for one of your future ideas might be extremely helpful....

Suggested layout for each post:

1. In the title area, to assist everyone with easy searching and reference, we could use the following type of layout:
• Dyno-3.2-Standard-ROW
or
• Dyno-2.5-modded-Twin Plug


2. Next in the top of the message area, use the following table to summarise your engine:

http://forums.pelicanparts.com/uploa...1282640247.jpg

3. Next, load your ACTUAL graphs and charts. It would be ideal to have the before and after graphs or charts, so the audience can see baselines. This will help to minimise misinterpretation from dyno variances. This data is probably available with everyone, but I personally can't find it in 1 spot..

4. Last section would be to identify build costs. Not be for everyone, but we're all interested in bang for buck, so this data might be useful... I'm sure WD will be delighted to see activity in the new parts catalog!:)

Anyways, hoping this DYNO idea doesn't sound silly & might be something to benefit from?? Maybe being selfish but this would be really interesting info..

Who wants to go first???


Chris

Good Call! I'll possibly be hitting the dyno this weekend and will post up the numbers. To add to your good idea, it would be helpful to have the stock numbers/graphs posted for each factory engine as well for comparison.

$5 Version
 

See Post 4 of http://forums.pelicanparts.com/porsche-911-technical-forum/560515-light-em-up-app-bosch.html#post5523278 for details

http://forums.pelicanparts.com/uploa...1282664722.jpg

The only major flaw here is that there are several kinds of dynos and they all generate different results. :) :) :)

Comparing engine dyno results to numbers from a chassis dyno is an exercise in futility; its simply "fuzzy" science.

There are several different kinds of chassis dynos: inertial (Dynojet), load-type (Mustang, Superflow), and hub drive (Dynopack). All three generate totally different results and cannot be compared to each other. I won't even go into how each machine's results can be skewed by setup.

This could be a fun exercise as long as one keeps everything in perspective,....:) :)

I say engine dyno results only!

Agreed that we need to have good data.
That is a key reason for the thread..

Before and after dyno data will be most beneficial as we're comparing apples and apples. This makes different dyno variances irreleveant.

My real interest lies in % or actual numbers that relate to the befores and afters.

For example:

....before the run we had 150HP on rolling dyno X. After installing a Brand ACME muffler, we had 156HP.

Result? 4% or 6Hp which, apart from environmental factors is attributable to the modification.

This is good data and really hard to source, especially from some vendors.


I also agree with Steve's point that postings of dyno 'AFTER' only results are also interesting and a bit of fun, albeit less objective.

Let's see what comes of it...;)