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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 03-31-2015, 02:45 PM   #365
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I'll leave this here.... Could be the deal breaker for some

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I am booked in with Fensport to have mine install in June because I want to keep my exhaust 2.5 " and intake, yesterday cosworth give the go ahead to change the maps provide by them can't wait
Not me BTW
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Old 03-31-2015, 03:14 PM   #366
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I'll leave this here.... Could be the deal breaker for some



Not me BTW
Why would this be a deal breaker?
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Old 03-31-2015, 03:20 PM   #367
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Why would this be a deal breaker?
Surely engine dyno & simulation time by Cosworth and then custom tweaked to your own mods is appealing? People had stated that they would rather the "tuner" package option rather than the 3 "OTS" map.
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Old 03-31-2015, 03:32 PM   #368
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Surely engine dyno & simulation time by Cosworth and then custom tweaked to your own mods is appealing? People had stated that they would rather the "tuner" package option rather than the 3 "OTS" map.

Ah, ok I gotcha.
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Old 03-31-2015, 03:43 PM   #369
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what would they tweak? slight fiddles to the MAF scaling and pulling out any spark where required?
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Old 03-31-2015, 04:00 PM   #370
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what would they tweak? slight fiddles to the MAF scaling and pulling out any spark where required?
intake cam profiles
exhaust cam profiles
ignition timing
AFR
direct injection timing
direct injection / port injection balance
driveability tweaks

etc
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Old 03-31-2015, 05:53 PM   #371
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Really ? all that? based on what data? it not like they'll be putting every car on the rollers

I'd expect it all to be based on their existing tune - which probably has got all the changes you mentioned and more besides over the stock tune - or is that what you meant?
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Old 03-31-2015, 06:20 PM   #372
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Really ? all that? based on what data? it not like they'll be putting every car on the rollers

I'd expect it all to be based on their existing tune - which probably has got all the changes you mentioned and more besides over the stock tune - or is that what you meant?
You misunderstood his post. He is talking about the cosworth tune being "open". Meaning that when you get your kit and tune the tune can be tweaked by you or your tuner of choice. You tweak cosworths tune.

Alternatively, a "tuner kit" doesn't come with a tune and it is up to your tuner of choice to tune the kit.
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Old 04-01-2015, 01:50 AM   #373
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Yes, the as vehicle speed and engine load increases so does torque and therefor friction. The more friction you have the more heat you have, thus higher drivetrain loss the higher in the RPM band you go. Another reason why it's good to have torque down low so its more useful than torque in the higher rpms.


F1 engines only put out close to 250 Ft.lbs. Horse power can always be geared down to provide the required torque. Having power band over more rpms = desirable. Nitride coatings in modern engines, by reducing friction, allow for higher rpm cylinders by allowing lower tolerance piston to wall clearances. Inertia from big displacement/torque engine is a greater loss here. All you need is this fancy thing called a heat exchanger.


I will give you that Straight cut gears are ideal for high torque. They have lower contact area = less friction when compared to high rpm helical cut gears.

Now go race a farm tractor with a Superbike.
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Old 04-01-2015, 02:35 AM   #374
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You misunderstood his post. He is talking about the cosworth tune being "open". Meaning that when you get your kit and tune the tune can be tweaked by you or your tuner of choice. You tweak cosworths tune.

Alternatively, a "tuner kit" doesn't come with a tune and it is up to your tuner of choice to tune the kit.
Why would you buy a tuner kit to tune from scratch when you can get them to tune from a well sorted base file? I don't think the unlocked tunes are for customers, just for the tuners selling the kit.

Realistically, from the provided tune, you would only need minor tweaks to AVCS, AFR, and ignition timing.
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Old 04-01-2015, 03:17 AM   #375
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Why would you buy a tuner kit to tune from scratch when you can get them to tune from a well sorted base file? I don't think the unlocked tunes are for customers, just for the tuners selling the kit.

Realistically, from the provided tune, you would only need minor tweaks to AVCS, AFR, and ignition timing.
Every other FI offering on the market offers an option for a tuner kit where you tune the kit yourself (or your tuner does it). It usually doesn't come with any tuning hardware or software so it is cheaper. This shouldn't be a surprise for you.

Some people want to use their tuner to start from scratch. I know of two tuners whom I have used that wont touch another tuners open tune. They would much rather start from scratch with their own FI starting tune. Most companies don't send out open tunes anyways so tuners need to start from scratch most of the time.

I don't think Cosworth will offer an option for Cosworth to "tweak" the tune for your mods. I have not heard they will offer this type of E-tune service.
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Old 04-01-2015, 04:14 AM   #376
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I don't think Cosworth will offer an option for Cosworth to "tweak" the tune for your mods. I have not heard they will offer this type of E-tune service.
No, they are apparently letting their retailers do it for them which is what I posted originally. I know what your saying about the tuner packages, but the reason why people go that way is so that the tune is for their car. I know that if I were a potential customer, if I could get a Cosworth stage 2/2.2/2.3 tune edited specific to my mods then that would be better than any from scratch tune from elsewhere in my eyes. The basis of the tune is going to be solid from the testing that they do and to customize it to a certain car isn't going to involve that much or that many big changes that you stray far from their original calibration.
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Old 04-01-2015, 07:13 AM   #377
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this is from the installation instructions..it appears there are two stage 4 tunes for the US market..with or with out the full exhaust ,with or with out manual /auto transmission
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Old 04-01-2015, 07:29 AM   #378
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Hi Ernie

my copy of the instructions shows 1 more variant
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