...sure thing.

 

Agh no its common sense.

 

I prefer data. Do you have IAT logs and flow data on your USP coolers? I'd be happy to compare. I can provide many logs at various ambient temps, boost levels, and load duration and could probably find a decent comparo match. Are you sure you're not confusing 997.1 and 997.2 coolers? They are very different.

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Sorry OP...good luck with the startup, it'll be a mean setup. If you have an injector out or a major tune issue you should know pretty quickly as it will idle like crap. If it idles well, bring it up to temp while checking for leaks, shut it down, keep looking for leaks (fire extinguisher handy). Once you've assured no leaks and you've got a good idle, I like to do a quick 2nd gear pull preferably with 100 oct in the tank just to check AFRs and timing and be sure. If things look ok, move onto a 3rd gear pull and so on (build up in pull duration). Then move back to pure pump gas (all whilst logging each pull). It's thorough but these motors aren't exactly cheap!

 

997.2 intercoolers the plastic is very restrictive they did a test on the USP intercoolers somehwhere on here. Tbey stay very cool even in hot weather up to 800hp. 997.2 intercoolers around 600ish.

 

...You realize it was probably Earl who did that test, right? He's got plenty of data comparing the 997.2 vs other vendor intercoolers, and the 997.2 have performed VERY well. Considering they weigh substantially less than aftermarket IC's, having a bit more heat soak is an acceptable trade off.

I believe Earl's data also showed that even though the 997.2's got heat soaked quicker, they also cooled down quicker.

 

There is no way a 997.2 intercoolers with plastic cool down faster then 4.0 intercoolers. That would be an insult to 911tuning.com


997.2 intercoolers are great for stock turbos with a flash on mild days.

 

I feel like we just rewound to 2010. Regardless, I'm not getting sucked into another dataless vendor cheerleading thread. Provide some logs and we can discuss further (preferably in another thread).

Happy boosting!

 

Tried to start it up, but the starter clicks once only and wont turn it over. Tried a different fresh battery, same thing. I'm checking things over now, like the fan belt and am pulling the starter off. I checked the clutch by spinning the wheels with it in gear pressed and not pressed, and the new GT2 slave seems to be working fine. Not sure what is wrong. I'll try the ground wires also.

 

Check the ground on the starter and ground strap on engine, etc. May just be a bad ground connection.

 

Check the switch on the clutch pedal if the above suggestions are squared away.

 

Plastic end tanks do not heat soak. So they're cooler at all times. Quality of cores mean more than their size.
And below's a screenshot of a run of mine from last autumn. Four consecutive laps about 9 minutes each with just few minutes of queuing between them.
OAT at start +16C (8AM) rising to +18C.
Tint = Temperature just after air filter
Tmanif = Temperature at TB


Lap times are BTG with ordinary street tires (Hankook Ventus Sport S01 evo).

Should tell something about the crappyness of 997.2 ICs...



PS: I can provide diagram of those temps for those who want to see how Tint and Tmanif correlate to RPM and/or boost pressure during the lap.

 

If you think stock intercoolers are great for turbo builds i feel bad for you my man. I have dyno tested and there crap.

 

I never took my 4.5s up against the gt2 RS ICs on same car same day same conditions... so do not have a honest opinion... but I do have dynos with 800 to 1100whp set ups and even ran a 9 sec. 1/4 run in 95 degree weather ( NO METH) which is still the only non tuner car in the world to do so only second to evoms car...
I have logged a car or two with the .2s but on mild systems... they cool well. The question, if any, is do they add HP... there is a formula to actually figuring that out... Unfortunately I have a business to run and cannot get into debates as well.. We sell molded one piece end tanks, we cnc our flanges per hoses used, we use bell cores( no hidden stuff here), and pressure test them to 35 psi on the bench before they are shipped.. ( also have made major upgrades since we first started to sell them).
I've had a recent client that actually had 2 different sets of the .2s blow up on him... so maybe thats the reason for some remarks... I often tell others to " at least get the .2s if you cant get the others)...
regards
markski

ps. my car with 6" ICs just trapped 121.41mph in the 1/8th and 153.93 mph in the 1/4 and its summer... that speaks for itself...

 

REALLY?? ,,997.2 coolers..
Can you show the dyno comparison graphs?

 

There ok for stock turbos but for 700hp and up and if you live in hot climate there not they heat soak. Look at the material the use vs something like i have USP intercoolers. My other car had the 911 tuning intercoolers man those were nice i saw my stock ones and i saw the 997.2 intercoolers.