Notices
997 Forum
Sponsored by:
Sponsored by:

997.2 3.6 dyno. vs E46 and F355

 
Old 05-14-2019, 10:42 PM
  #1  
INTMD8
Addict
Rennlist Member
Thread Starter
 
INTMD8's Avatar
 
Join Date: Nov 2009
Location: Lake Villa IL
Posts: 239
Default 997.2 3.6 dyno. vs E46 and F355

Dyno run is from my 2010 base carrera 3.6, manual trans. Dynojet 248. I have no real plans to mod the car, was just curious what it would put down and thought I would post the results if it happens to interest anyone.

Also overlayed the graph first against my (now sold) E46 M3, completely stock and against my 95 F355. (cat delete and capristo muffler)

They were all done some time apart but on the same dyno by the same operator (me).

All runs were done in 5th gear, for all cars.

997-



997 and M3-



997/M3/F355-

INTMD8 is offline  
Old 05-15-2019, 09:25 AM
  #2  
Petza914
Addict
Rennlist Member
 
Petza914's Avatar
 
Join Date: Oct 2007
Location: Clemson, SC
Posts: 10,589
Default

Neat. I'd have thought the M3 would be stronger, and it's also impressive the way the Ferrari keeps making power at the high RPMs.
Petza914 is online now  
Old 05-15-2019, 10:36 AM
  #3  
Bruce In Philly
Addict
Rennlist Member
 
Bruce In Philly's Avatar
 
Join Date: Dec 2012
Location: Philadelphia
Posts: 3,273
Default

Originally Posted by Petza914 View Post
Neat. I'd have thought the M3 would be stronger, and it's also impressive the way the Ferrari keeps making power at the high RPMs.
That what my first reaction also.... so what is it about the Ferrari engine design that does that?

I read in Christophorous... about 15 years ago.... in an interview with a Porsche engineer that one of their engine design objectives was to flatten the torque curve and and provide more torque earlier in the range. Honestly, I was appalled when I read that. For me, it told me that Porsche was catering to the poser market who did not know how to drive a sports car. You know, someone who floors it without downshifting. But anywho......

Peace
Bruce in Philly
Bruce In Philly is online now  
Old 05-15-2019, 10:46 AM
  #4  
INTMD8
Addict
Rennlist Member
Thread Starter
 
INTMD8's Avatar
 
Join Date: Nov 2009
Location: Lake Villa IL
Posts: 239
Default

Originally Posted by Bruce In Philly View Post
That what my first reaction also.... so what is it about the Ferrari engine design that does that?
Cam timing, head flow and very short intake runners. F355 is individual throttle body and 5 valve/cyl. That's also why it's -soft- at low/mid rpm, everything was tuned for high rpm. Not such a problem as it has short gearing.

The next generation 360 modena used a similar 5 valve engine but they bolstered the low/mid range torque with variable cam timing and dual inlet paths (long and short runners).
INTMD8 is offline  
Old 05-15-2019, 11:15 AM
  #5  
ekam
User
 
Join Date: May 2009
Location: Toronto
Posts: 738
Default

This:

ekam is offline  
Old 05-15-2019, 11:19 AM
  #6  
ekam
User
 
Join Date: May 2009
Location: Toronto
Posts: 738
Default

It's also why F355 with an exhaust sounds like a F1 engine...
ekam is offline  
Old 05-15-2019, 12:44 PM
  #7  
Sporty
User
 
Join Date: May 2013
Location: North/Central, NJ
Posts: 212
Default

Thanks for sharing- good info. So are we seeing that for the 997.2 3.6 there is less than (only) a 9% loss from flywheel to rear wheels? That is , 345 HP to 315 HP - that's good, always thought it was more like 15-20% loss. Don't know the torque number difference offhand though.
Sporty is offline  
Old 05-15-2019, 01:01 PM
  #8  
driggity
User
 
Join Date: Mar 2019
Location: SF Bay Area
Posts: 11
Default

Originally Posted by Sporty View Post
Thanks for sharing- good info. So are we seeing that for the 997.2 3.6 there is less than (only) a 9% loss from flywheel to rear wheels? That is , 345 HP to 315 HP - that's good, always thought it was more like 15-20% loss. Don't know the torque number difference offhand though.
That loss is pretty consistent across all three cars. The M3 is 333 at the crank and the F355 is 375.
driggity is offline  
Old 05-15-2019, 03:00 PM
  #9  
quickxotica
Addict
Rennlist Member
 
quickxotica's Avatar
 
Join Date: May 2006
Location: San Francisco & parts north
Posts: 819
Default

I'm impressed by the torque of the 997, on a relative basis. Very useful in a street car, and they did it without (apparently) sacrificing too much at the top end. It's all about the area under the curve, after all. The DFI 3.8L would probably be even more dominant in this regard. Now, if we could only have the short gearing from the 355, then you'd really have something. :-)

Thanks for sharing!
quickxotica is offline  

Thread Tools
Search this Thread

Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: