BGB Motorsports

That's about right. 200-210 on the ECT will keep you at 240 on the OT. Once you hit 220 on the ECT, it's a downward spiral and you'll hit 270 on the oil. While it's not ideal, a 9A1 motor can survive this environment for up to 2.5 hours.

As for PDKs and over-heating, we don't have any PDK over-heating issues at Sebring in the summertime. The southeast U.S. is a good test bed for this stuff. PDK cars come with wet clutch cloolers. At BGB, we install gearbox coolers and power steering coolers. The DFI cars are already cooling the power steering fluid through the OEM oil cooler.

991s and 981s have no power steering hydraulics and they come equipped with transmission coolers and pumps, stock now. So...Porsche has been listening!

BGB Motorsports

P.S. whoever said that 350 crank horsepower is the max bolt-on crank horsepower for a DFI 3.4L Cayman is not correctly informed. How else do did we do 175mph in a 3.4L Cayman at Daytona with a 3.4L stock motor?!?!?!?

mrd_spy

How else do you do 175 mph ?

It does 172mph stock lol

the_vetman

John, I think we/they were talking about Gen 1 295 bhp engine. Anyway, thank you for the info above.

stevecolletti

Doing 175 at Daytona is different than the top speed the car is capable of, which usually takes a lot longer straightaway.

fhp911

I'm ignorant, I guess - -what's 'ECT' ??

TIA, CIA, etc,

orthojoe

Engine coolant temp - ECT

Thanks for the info, John!

mrd_spy

I dug out the dyno before and after of the bolt on mods to my Cayman
plan to do the same to my SPyder in spring

Marine Blue

Will you Dyno after each of these mods or after they have all been performed? I'm curious to see how much Hp is gained from the Remus Exhaust.

More importantly, I'm curious if you see a similar gain on the Spyder or has Porsche already done many of these changes on the Spyder to get it to 320 Hp?

mrd_spy

If I do the spyder in spring I will also change the manafolds which I did NOT do on my cayman.

on the non dfi car there was a dead spot, doing the mods was worth it for that smooth power curve alone.

Remus has to be worth 10BHp the Cayman R has a bigger exhaust and gets 330BHp

hoping to get a nice round 350BHp this time doing the manafolds aswell.

I see cargraphic now have a full kit available
whats odd is the spyder kit is this "
Power Upgrade to 260KW / 354PS and 407Nm"

but the Cayman R kit is this quote !!!!
"Powerkit 4Power Upgrade to 268KW / 365PS and 421Nm"

they should be the same imo !!!!!

tcsracing1

how is this CDN caymen project going?

Zeus993

Bullet Racing dropped a 997.2 GTS engine into their Cayman plus a bunch of GT3 parts and pulled off a 2nd place finish in the Rolex 24 Hour GX class.

Check this out:

https://rennlist.com/forums/racing-a...et-racing.html

BGB Motorsports

Unfortunately this entire thing is controlled by the oil temperature. When the car runs 200 to 210 on the ECT (Engine Coolant Temp - Be careful because i saw a car this weekend with ET which is Engine Temp or Engine Bay Temp on the AIM dash), it's happy and the oil will live at or around 220 - 230 degrees. Once your car gets to 225 on the ECT, the oil will begin to creep up to 250 and if you get anywhere close to 230, the oil will live around 270. Unfortunately this is where the car will pull timing and add fuel to protect the motor. While we have run these cars for 2.5 hours at these levels, it's only bceause we were forced to for points/racing reasons.

Having just spent the 3 hour enduro at Sebring in the PDK, I watched the car run 208/230 for 100 minutes straight. During the final lap i tried to put around to save fuel at 50% and the car's ECT dropped to 183 and the oil fell back to 208.

So...I think it's probably best advice to all of your PDK guys that run DEs that if you can, stop 1 lap earlier before they checker your session and do a real "cool-down" lap staying off the brakes and turning off Sport Plus and backing it down for a lap.

BGB Motorsports

DOH! Sorry about that. I stand corrected!