Rolling Road last night.

Red Dot Racing

here, click rolling road linky at top

What is a "selectable transmission system" transmission? Posh words for manual? Or is the ability to make it 2WD?

I don't see how they can do 4wd with only one roller bed as per the pics of the f50 on them...

Originally Posted by Phil_D

I don't see how they can do 4wd with only one roller bed as per the pics of the f50 on them...

They can't... they can do 4WD cars with selectable RWD or FWD transmission.

THey cant measure 4WD though.

Whats happened to this site? since when did rolling road figures mean anything? 147gta's are optimised for 95 ron petrol, you wont get anything extra by wasting cash on super etc.

Originally Posted by ukoldschool

Whats happened to this site? since when did rolling road figures mean anything? 147gta's are optimised for 95 ron petrol, you wont get anything extra by wasting cash on super etc.

I disagree,
i have logged real time data on cars optimised for 95 ron and you would be surprised by how much the timing retards when the weather is hot etc. The engine is optimized at 95 but id doesnt mean that it will not detonate under certain cirqumstances.

Also, if you had the car remapped for higher octane fuel you could afford to lean it off a bit on full throttle. It does run really rich at high revs and full throttle, which must be costing it a good few bhp..

The issue with the standard engine setup is that if you want to map it for max performance will always have the heat retention issue against you. What i mean by that is that the precats are trapping a lot of heat on the cylinder head. THis as a result makes the engine very tricky to map as you need a lot of fuel cooling to eliminate detonation.
Ideally you need to get rid of the precats whic will in turn reduce the heat retention. Then you will be able to effectively map the engine and lean it out a bit.

Originally Posted by newalfisti

I disagree,
i have logged real time data on cars optimised for 95 ron and you would be surprised by how much the timing retards when the weather is hot etc. The engine is optimized at 95 but id doesnt mean that it will not detonate under certain cirqumstances.

I agree it may make a differenc eon other cars, but were talking about the alfa gta engine management system, and it will not make any difference to performance using anything other than 95 RON.
Do a few searches, its been discussed here at length many times before. The ECU isnt capable of making an adjustment to take advantage of an increase in RON.

My car is mapped to 98 buddy.. I don't think i mentioned that in this thread..... That is why it was noticeable.

Originally Posted by ukoldschool

I agree it may make a differenc eon other cars, but were talking about the alfa gta engine management system, and it will not make any difference to performance using anything other than 95 RON.
Do a few searches, its been discussed here at length many times before. The ECU isnt capable of making an adjustment to take advantage of an increase in RON.

Agree, the ECU will not advance the timing if you put 98RON. But it is perfectly capable to retard it. The use of 98RON will allow the ECU to correct the timing to a lesser extent and it will allow the engine to run at the nominal table values or close to them.
So you will indeed get a benefit by using 98RON.

Originally Posted by newalfisti

Agree, the ECU will not advance the timing if you put 98RON. But it is perfectly capable to retard it. The use of 98RON will allow the ECU to correct the timing to a lesser extent and it will allow the engine to run at the nominal table values or close to them.
So you will indeed get a benefit by using 98RON.

IF there is any detonation of 95 octane fuel. Obviously if zero detonation of 95 fuel occurs, then there is no benefit to running 98.

Originally Posted by OperationAlfa

My car is mapped to 98 buddy.. I don't think i mentioned that in this thread..... That is why it was noticeable.

?

I take it your car has its standard ECU replaced with a MOTEC then? because the standard GTA ECU's fuel setting cannot be changed.

which is why its not worth spending money on increased RON fuel, unless you have shares in BP/Shell etc no matter what anyone tells you - you are wasting your time on an Alfa.

Some cars from outside the EU (mainly Japan) have ECU's that can adapt, but not the ECU in a GTA

Originally Posted by ukoldschool

?

I take it your car has its standard ECU replaced with a MOTEC then? because the standard GTA ECU's fuel setting cannot be changed.

No idea, ask Jano. I know nothing about the ECU electrickery.

My old TS was mapped to run on 98. It certainly gave more BHP on the rolling road than standard 95.

which is why its not worth spending money on increased RON fuel, unless you have shares in BP/Shell etc no matter what anyone tells you - you are wasting your time on an Alfa.

I will argue that shell V-power is great just for it's cleaning additive anyway.

OA knows his fuels thats for sure

Originally Posted by explosive alfa

OA knows his fuels thats for sure

Want some biodiesel?

no thanx, i like petrol

Originally Posted by ukoldschool

I take it your car has its standard ECU replaced with a MOTEC then? because the standard GTA ECU's fuel setting cannot be changed.

The spark timing can be retarded, so it sparks later, through a remap. (This gives higher M.E.P. per cylinder and more creates more torque at the crank.) This is what OA means by "mapped for 98 octane fuel". Normal 95 octane would detonate before the spark activated if the spark timing was retarded this much, this is why 98 octane is then required. Same case with my V6 running a Dastek Unichip.

Originally Posted by OperationAlfa

No idea, ask Jano. I know nothing about the ECU electrickery.

My old TS was mapped to run on 98. It certainly gave more BHP on the rolling road than standard 95.



I will argue that shell V-power is great just for it's cleaning additive anyway.

OK, first off we arent talking about your old TS, were discussing the GTA ECU. As far as asking Jano - why? Jano hasnt claimed (anywhere that I can see) that your car is mapped for 98 RON fuel - you did...
Jano only claims:
"10-12bhp increase, more torque. With altered fly-by-wire settings to improve throttle response. Rev limit raised to 7500rpm. Speed limiter removed"
Pure fiction of course (10-12 bhp) and not backed by any actual proof (ie a before and after graph on the same RR) so taken with a pinch of salt usually...

Yeah V power is great if you like overpaying for off ethanol and less petrol!

iirc v power isnt just ethanol surely thought it had chemicals within it developed in a lab

what do you think boosts the octane rating?

obviously, but it must have more then just ethanol in it

Squadra say they write their maps for higher octane

Always use RON97/98 Fuel after installing a Squadrachip !

and comparing the GTA ECU to a TS isn't far off, both 147 TS'sesees use the same Bosch Motronic 7.3.1 for example.