DNSGT3

Once the car is revealed, I will revisit this thread and reading all the speculations. It will be hilarious.

tcsracing1

$9k will get you the brake system. Then you can drop down to 18" wheels.
They are amazing. I typically get 2-3 race weekends out of a set of rotors. That is 3-4 days of hard track each weekend.

tcsracing1

BGB has been fitting GT3 callipers to the Cayman for years. It is a nice upgrade.

BGB Motorsports

We have a bracket made for putting 997.2 GT3 calipers on 981/991s and 987/997s which work with an 18" wheel. You can also purchase the complete PFC brake system that goes on the 991 Cups and 981 Clubsports. The calipers are awesome and we rebuild them roughly every 6 events, installing new seals and replacement bits. The single biggest advantage I see of that PFC setup is the pad thickness; the rotor life is actually quite nice also. On the Clubsport we run in IMSA we run Friction One pads from RS1 and haven't looked back since first trying them. The pad life is excellent and it's a better fit with the ABS jump in at the threshold.

And now back to 718 GT4 speculation, our regularly schedule program.

Shockwave

Would that be a more worthwhile venture vs. buying the entire Essex kit?

tcsracing1

I am not sure of the cost for Essex kit, however the PFC is the benchmark.
Realistically, for a street car the GT3 upgrade would be my choice. Easy to get pads and discs.

GrantG

That's very impressive if accurate, but it's a little bit misleading to think that it is due to the displacement increase. If whatever techniques that achieved these numbers were applied to the 3.8L motor, then the results should be the same across the board less 5%.

Torque and Displacement are basically proportional (5% more displacement nets 5% more torque at all RPM - and the motor without the stroker crank should be theoretically capable of higher revs and more power per liter). Modifications can obviously be applied to either motor to make the numbers look to be independent from displacement changes.

ExMB

+1

When you look at the chart provided you will see the following:

Complete and Dyno Tested it includes:

• 403HP and 340FT/Lb of TQ at the wheels!
• 4.0L Stroker kit
• 82mm Throttle Body
• Headers
• Mufflers if desired
• In-house Custom Dyno Tuning

In a way thats comparing apples to oranges. Even just adding aftermarket headers to the OEM 3.8 shows differences in hp and ft-lbs from factory specs.

Show me a dyno with just the 4.0 upgrade vs the OEM 3.8 and all the other parts stock. Or in lieu of show me a 3.8 with all that added stuff compared to that 4.0 and its added stuff.

BGB Motorsports

+1

When you look at the chart provided you will see the following:

Complete and Dyno Tested it includes:

• 403HP and 340FT/Lb of TQ at the wheels!
• 4.0L Stroker kit
• 82mm Throttle Body
• Headers
• Mufflers if desired
• In-house Custom Dyno Tuning

In a way thats comparing apples to oranges. Even just adding aftermarket headers to the OEM 3.8 shows differences in hp and ft-lbs from factory specs.

Show me a dyno with just the 4.0 upgrade vs the OEM 3.8 and all the other parts stock. Or in lieu of show me a 3.8 with all that added stuff compared to that 4.0 and its added stuff.[/quote]

These are all good points. It's probably worth mentioning that the 4.0L upgrade Rick and I both sell is a stroke change which produces more torque than horsepower relative to a bore increase which would make more power than torque. This board never disappoints when it comes to information. Keep it up!

Rxpert

ajw45

There's also an increase in compression and the bigger tb would imply a different intake manifold since I don't think you can just slap a bigger tb on the stock intake. It's really a combination of upgrades that makes all this work, focusing on just the displacement bump alone can be a little misleading.

FWIW my 4l ticked over 5k miles this weekend at Smokies and is running great!

Five12Free

GrantG

This is one of the few ways to get more torque with an NA motor... Unfortunately, there's not much room for improvement over stock without using better fuel (and a custom ECU tune to match)...

Diablo Dude

And we get ripped-off here in California where premium fuel is only 91.

GrantG

93 Octane doesn't make much difference. To get much more torque, you need significantly higher compression and octane (like triple-digit race fuel).

I use E85 in my DD Evo IX in the Summer with 24 psi of boost and a special map. That gives great torque per liter (435 ft-lbs from 2.0 Liters). E85 costs $1.85 per gallon (Govt subsidies make it cheap) and is around 106 octane...