Another Rolling Road Log
Turbo Mini Forums

Edited by Paul S on 6th Nov, 2009.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

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Edited by robert on 6th Nov, 2009.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

[quote=Paul S,6th Nov, 2009results is to increase the VE to 0.95. Actually I need to go higher than 0.95 for the Spud and the TT2.

quote]

yes we both appear to be running at 127 bhp/litre in the 6300rpm,12 psi range of boost ,what ve do have for that ?

ben combination of more valve area per cc ,big turbo and low ex back pressure and tighter lsa cam is working well at that rpm .really looking forward to seeing its performance at 20 psi .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

This is how I think that the Spud and the TT2 attain that sort of power.



More efficient turbo.

Bigger intercooler and better placement/airflow.

Better flowing head and larger valves.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

do you think its s.o.t time paul??lol

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

s.o.t time ?????

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Oh yes, silly me not remembering :$

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Go on then, what is that indicating? Is it something to do with lambda vs power output?

x2 robert, whats that all about?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

It's something like specific output.

i.e. hp per cc per psi boost per 1000 rpm or some such milarkey.

Good for comparing the state of tune of different engines.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Robert, are you sure the key is right? I would expect the shape of mine to be the dark blue line?

Team www.sheepspeed.com Racing

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

yes its off efi minis from the last rr shootout in the beginning of the year .. i havent done anything about one for this shootout yet ,a lot of numbers and 22 hours without sleep and 8 hrs jetlag dont go well together lol.

heres the link

http://www.efiminis.olicentral.com/index.p...msg4651#msg4651

Edited by robert on 6th Nov, 2009.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

oh ill need to know everyones engine capacity ?

ah scrub that , it seems to be on the data i have .:)

Edited by robert on 6th Nov, 2009.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

lol downloading open office the now to give this a run with my last RR printout! is power in the formula wheel power, or estimated flywheel, and what are the units?

cheers :) very interesting analysis on this and the RR day thread!

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

I havent got a clue what this thread is talking about, but congratulations! (I think)

I feel like an elderly relative at christmas, slightly lost and in a different world to everyone else around the table

Nan, it's a Dildo!

Team www.sheepspeed.com Racing

On 6th Nov, 2009 Paul S said:
Result.

It does actually what it says on the tin !!!!

Well it did after we advanced the ignition a bit.

Ist run was much the same as before despite my attempts to improve matters. 104hp and 95 lb ft.

Following Troys advice, we advanced the ignition for the top two lines of the map. We had it set at 18 degrees advance at 1 bar boost. Too conservative.

Anyway, the final run at 24 degrees maximum ignition advance was no better than 22 degrees, so we knew we had the optimum.

The end result was 112 hp and 105 lb ft. Just three horsepower down from expected, but boost was down to 0.84 bar from 0.88, so overall approx. a 10% improvement.

Still can't get the outer cylinders running as rich as I would like on the rolling road, whereas on the dual carriageway they are spot on.









I'll post the Megaview log later.

Team www.sheepspeed.com Racing

good for you denis , its flywheel in bhp .be very interestred to see what you have .make sure you dont have a % based losses adding onto it all , if you have use at the wheels and add a sliding scale of losses
you could base it on this .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

I've been puzzling about why my power drops off at 5700rpm.

I've been blaming the standard unmodified cylinder head (other than unleaded seats) and thinking that the 25.4mm exhaust valves were a problem.

But it suddenly ocurred to me that I had not checked what the rev limiter was doing - silly me.

Seems from the Megalog that the soft cut was retarding the ignition from 5700 rpm onwards as can be seen from the log:


The white line on the middle graph is the ignition advance.

So, if I had maintained the 105lbft up to 6000rpm, then we would have hit the 120hp :$

Edited by Paul S on 3rd Mar, 2010.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Amature....

I'm surprised they didn't spot that at the RR but, on the other hand, it may be why your engine is still in one piece :)

Schrödinger's cat - so which one am I ???

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

I understand what you are saying, but do not have an issue with the ignition retard coming in just before the fuel cut. That's the way the MS rev limiter works.

You can certainly feel the power start to drop as it hits the soft limit at which point you change into the next gear. It's only ocurring for a split second in reality, whereas on the rolling road we were heading for 6000rpm in top gear and because of the total lack of acceleration of the car we could not feel the power drop off.

The other issue is that it would be very difficult to cut individual cylinders with the way the car is set up with a single pulse feeding two cylinders at a time.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."