As if we didn't know
#16
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by RSA333
The Porsche DP engine is 3.99 liters.
#17
Burning Brakes
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
What we should be focusing on is designing a half-shaft and boot that wont fail! The race woulda been theirs if it weren't for them damn half-shafts. The AJR car was damn fast....making up a lap/hour...incredible.
#18
Still plays with cars.
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I recall watching Rolex races last year and hearing an interview with Hurley saying that LAST YEAR they were trying out a new 3.9 liter engine. Since then the cars went to Porsche who worked some magic on the chassis and aerodynamics .. maybe the engine too. I doubt they would have reduced the displacement from the 3.9 they used in 2005.
rgds,
rgds,
#19
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by Bob Rouleau
I recall watching Rolex races last year and hearing an interview with Hurley saying that LAST YEAR they were trying out a new 3.9 liter engine. Since then the cars went to Porsche who worked some magic on the chassis and aerodynamics .. maybe the engine too. I doubt they would have reduced the displacement from the 3.9 they used in 2005.
rgds,
rgds,
Theo
#21
Technical Guru
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by roberga
So the Jobs web site is providing incorrect information as to the specs of their motor? Would this be intentional or they do not know?
#22
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by JasonAndreas
It might just be the case of the webmaster not getting updated information? Contrary to what was said on Speedvision there are no weight or maximum rpm penalties (that I could find) for any Porsche engines below 4 liters. The only disadvantage of running a 3.99l (that I could find) is that the compression ratio is limited to 11:1, the 3.6l & 3.8l have no limits. In the latest competitors tech bulletin the GrandAm limited the fuel-pressure that the 3.9l could run so the lower compression ratio doesn't seem to be a limiting factor. I can't see Porsche being allowed to run engines with 200cc extra displacement and not doing so. Porsche are the grand-masters of regulation stretching so why would they purposely underbuild an engine? If anything that 3.9 liters was measured to 11 decimal places using some obscure measurement standard that almost no one has heard of.
Here is an article that says 4 cars used the 3.8L:
http://www.motorsport.com/news/artic...ANDAM-GRANDCUP
In Part:
"Brumos Racing has been testing and providing development data for our Porsche 911 GT3-based 3.8-liter flat six engine. We are grateful to them for letting us use their race car as a test lab, and we feel confident that the other Daytona Prototype competitors will benefit from the results," said Uwe Brettel, president of Porsche Motorsport North America
#24
The Rebel
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by Niels Jørgensen
... Bob Snodgrass???? Snodgrass?? I almost spat coffee all over my keyboard - someone, tell me that is a typo? ![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
I do recall them (Brumos) having 3.9L engines last year and you're correct they were/are built by Manthey Racing!!
#25
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Listening to AJ comment on the addition of a new drop gear that allows the transaxel to be lowered in relation to the engine also lowered the center of gravity helped to make the car more competative.
#26
Intermediate
Thread Starter
Join Date: Aug 2001
Location: Pasadena, CA
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Does anyone believe that Porsche will introduce the GT-3 engine in the street
car BEFORE putting it in a GT-3 race car? If this engine in a de-tuned state
is the basis for the next GT-3 motor, and the Cup cars for the season have
the old 3.6, wouldn't Porsche wait until about now next year to release the
GT-3 street, after the engine is released for the Cup and customer cars?
car BEFORE putting it in a GT-3 race car? If this engine in a de-tuned state
is the basis for the next GT-3 motor, and the Cup cars for the season have
the old 3.6, wouldn't Porsche wait until about now next year to release the
GT-3 street, after the engine is released for the Cup and customer cars?