Worth It To Tune a 3.4L Engine?
I’ve got the larger GT3 throttle body and IPD plenum, can software tuning gain me much more? If so what tuner does everyone recommend.
I have access to 93 octane FWIW. |
Not really IMHO. Just buy a more powerful 996.
Unless it's all about the journey, then I'd say go for it just don't expect any RoI. The X51 package shows what's possible. |
It’s in a boxster racecar so just wondering what might be possible. Car has no cats either so...
|
Any other opinions or thoughts?
|
If you are only ever using 100 octane you ought to be able to tune to advance the timing a little. You can always raise the rev limiter. That's about all that can be done on a NA engine, as adding fuel needs to be balanced by more air. There's little you can do to get more air so there's little point in adding more fuel. Any air additions should be within the tuning range of the DME already.
Perhaps you can adjust the variocam setpoints or delete the SAI or something like that. |
Bore out to 4.0L.
|
If you really want to go nuts with your M96... which personally I would not do...
FVD sells some Schrick MFG cams for the 3.4 https://www.fvd.net/us-en/1001059960...l-schrick.html |
Originally Posted by theprf
(Post 17423382)
If you are only ever using 100 octane you ought to be able to tune to advance the timing a little. You can always raise the rev limiter. That's about all that can be done on a NA engine, as adding fuel needs to be balanced by more air. There's little you can do to get more air so there's little point in adding more fuel. Any air additions should be within the tuning range of the DME already.
Perhaps you can adjust the variocam setpoints or delete the SAI or something like that.
Originally Posted by sdematt
(Post 17423390)
Bore out to 4.0L.
|
I went with Shrick cams and went to 3.8 from 3.4. I'm a fan.
|
Originally Posted by Mike Roblin
(Post 17423400)
So the DME will auto adjust when we put the larger TB and IPD plenum on the engine?
|
Check out my post on catless xpipes. The DME does not compensate enough for the catless setup using o2 spacers IMO. I get drivability issues under heavy load at ~1500rpm. Seems to be hit or miss but I am not the only one this has happened to. You'll also lose a lot of torque in the lower range.
Granted if this is a race car, you might spend most of your time above the 4k rev range where your upgrades will be very noticeable without the need of a tune. |
Thanks everyone, looks like we’ll install the GT3 TB and IPD Plenum and see what happens.
|
Keep us informed of your progress I’m very interested in your same setup I’d like to do the same
Mike |
My vote: get a dyno first, then change the TB/Plenum, dyno again, then tune, dyno a third time. We NEED data. :cheers:
Actually, maybe those are dumb comments that would waste money. I recall from some discussions that tuning the 3.4 is limited due to the DME version. Stupid memory can't recall clearly. Certainly worth some searching. |
Shrick cams.
Originally Posted by zbomb
(Post 17423397)
If you really want to go nuts with your M96... which personally I would not do...
FVD sells some Schrick MFG cams for the 3.4 https://www.fvd.net/us-en/1001059960...l-schrick.html https://cimg2.ibsrv.net/gimg/rennlis...53c56cafb.jpeg Bobby Labonte in Fronf of Jeff Gordon. Penny oil street nationals 13-17 second braket I finished second. Bottom 1994 pikes peak hill climb, we sponsored Roger mears. I got a ride in that car. |
All times are GMT -3. The time now is 05:40 PM. |
© 2024 MH Sub I, LLC dba Internet Brands