Notices
997 GT2/GT3 Forum
Sponsored by:
Sponsored by: Porsche North Houston

gt3 engine tunning

 
Old 06-29-2019, 02:27 PM
  #1  
Ezer Hay
New User
Thread Starter
 
Join Date: Jun 2019
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default gt3 engine tunning

Hi
I was thinking to upgrade my GT3 997.2 engine as i feel there is some lack of torque at low rpm.
I saw cobbtuning accessport, any thoughts about it?
I am using the RS fly wheel and clutch on my car, so instant revving is not a problem.
Thanks
Ezer Hay is offline  
Old 06-30-2019, 12:28 PM
  #2  
LateBraking
Addict
Rennlist Member
 
LateBraking's Avatar
 
Join Date: Dec 2014
Location: America.
Posts: 453
Likes: 0
Received 0 Likes on 0 Posts
Default

I think your only "real" options are Cobb AccessPort and Sharkwerks' EvoMSit tune. I personally am using a Cobb AccessPort as I have a 3.8L build on my 997.1 and the Cobb AccessPort allowed for a custom tune from Dyno Spectrum (guys that worked on developing the Cobb AP). I have not tried their "off the shelf" tune that is included with the Cobb AP but I reckon it's fine for small improvements, and the nice thing with the Cobb AP is that you'll have the option to get more out of it with a custom tune later if you want. Plenty of guys are using Sharkwerks/Evolution Motorsports' EvoMSit tune with no issues.

Not sure what to tell you beyond that. Your question "any thoughts" is pretty open-ended. Uhhh....I could tell you that it has a sleek shape and funny looking buttons, or that I think the OBD-II cable that's included is a hair too short, or that they should offer a faceplate option with real carbon fiber and not that fake hydro-dipped one. (Not really, I don't care about that, but you get my point.)
LateBraking is offline  
Old 07-01-2019, 05:47 AM
  #3  
Ezer Hay
New User
Thread Starter
 
Join Date: Jun 2019
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default

Do you have any data of how much gain in power you got from the tune?
Ezer Hay is offline  
Old 07-02-2019, 03:32 PM
  #4  
cgfen
Addict
Rennlist Member
 
cgfen's Avatar
 
Join Date: Oct 2006
Location: Vista CA
Posts: 5,174
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Ezer Hay View Post
Hi
I was thinking to upgrade my GT3 997.2 engine as i feel there is some lack of torque at low rpm.
I saw cobbtuning accessport, any thoughts about it?
I am using the RS fly wheel and clutch on my car, so instant revving is not a problem.
Thanks
Your perception is correct.
The 997.2 engine is not designed to have significant TQ at low RPM.
That is one reason why driving one is so interesting / rewarding.

Embrace the reality

Have fun.
cgfen is offline  
The following users liked this post:
Mr. Adair (07-02-2019)
Old 07-02-2019, 05:20 PM
  #5  
Bxstr
Addict
Rennlist Member
 
Bxstr's Avatar
 
Join Date: Mar 2013
Posts: 1,229
Likes: 0
Received 13 Likes on 11 Posts
Default

If you said you were looking for better throttle response, then I would say go for the tune. But since you are looking for torque, I don't think a tune is going to be the answer. The only real answer for torque would be a 911 Turbo.
Bxstr is offline  
Old 07-03-2019, 12:09 AM
  #6  
chiffonade
User
 
chiffonade's Avatar
 
Join Date: Aug 2010
Location: LA
Posts: 72
Likes: 0
Received 0 Likes on 0 Posts
Default

The cobb increases low RPM torque significantly. But it's never going to feel like a V8 or a turbo. Nothing else will feel like a 911 turbo except a GT2

Look at the dyno chart here dude. It's their own website. Scroll down.

https://www.cobbtuning.com/products/...7-2-gt3-gt3-rs
chiffonade is offline  
Old 07-05-2019, 10:16 PM
  #7  
mooty
GT3 player par excellence
Lifetime Rennlist
Member
 
mooty's Avatar
 
Join Date: Apr 2002
Location: san francisco
Posts: 38,782
Likes: 0
Received 44 Likes on 30 Posts
Default

imo, 997needs no tuning.
you should never let it drop below 5000rpm.
mooty is offline  
The following 2 users liked this post by mooty:
MJFDDS (07-08-2019), Mr. Adair (07-11-2019)
Old 07-10-2019, 12:27 PM
  #8  
voodoo
Addict
Rennlist Member
 
voodoo's Avatar
 
Join Date: Jun 2012
Location: Corona, CA
Posts: 332
Likes: 0
Received 2 Likes on 1 Post
Default

Originally Posted by Ezer Hay View Post
Hi
I was thinking to upgrade my GT3 997.2 engine as i feel there is some lack of torque at low rpm.
I saw cobbtuning accessport, any thoughts about it?
I am using the RS fly wheel and clutch on my car, so instant revving is not a problem.
Thanks
I bolted Fabspeed headers on my .1 and the increase in torque from 3000-5000 RPM's was very surprising. I'd do it again in a heartbeat.
voodoo is offline  
Old 07-11-2019, 04:28 PM
  #9  
FruitFly
User
 
FruitFly's Avatar
 
Join Date: Oct 2016
Location: Issaquah, WA
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by voodoo View Post
I bolted Fabspeed headers on my .1 and the increase in torque from 3000-5000 RPM's was very surprising. I'd do it again in a heartbeat.
same here, the dyno before / after showed 21 lbft gain @ 5000 rpm. the map shows the separation starting at 3000 as voodoo states. i went with dundon catless race headers + their center muffler.
FruitFly is offline  
Old 07-13-2019, 08:08 AM
  #10  
TTurbine
User
 
TTurbine's Avatar
 
Join Date: Feb 2010
Location: Qatar
Posts: 557
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Ezer Hay View Post
Hi
I was thinking to upgrade my GT3 997.2 engine as i feel there is some lack of torque at low rpm.
I saw cobbtuning accessport, any thoughts about it?
I am using the RS fly wheel and clutch on my car, so instant revving is not a problem.
Thanks
Easy solution change the R&P ratio
TTurbine is offline  
Old 07-15-2019, 11:56 AM
  #11  
HarmonyJim
Addict
Rennlist Member
 
HarmonyJim's Avatar
 
Join Date: Mar 2012
Location: Sacramento, CA
Posts: 314
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by TTurbine View Post
Easy solution change the R&P ratio
I agree. Did the 997.2 RS trans ratios on my 997.1 RS and it transformed it. Great change, but somewhat costly (all told with Guard diff and new clutch/RMS) runs about $11-12K.
HarmonyJim is online now  
 


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: