turbo lag
- Thread starter imannsh0
- Start date
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EcoBrick Bob
SHO Member
YOU.... Need a TUNE!
Snorman
New Member
They seem to spool pretty fast. However, it would be nice to see a real boost gauge in the car.
S.
S.
mjhpadi
New Member
I never noticed much lag at all with the SHO and after the Livernois tune, it is virtually non-existent.
Unknown_Driver
V6TwinTurboAWD
i don't notice lag either and i used to have a WRX a while back
BTW i just noticed your sig
how could you sell that 
SterlingGraySHO
Member
seems I remember a TSB 10-17-10 that concerns spark plugs, that may be the issue, good luck!
St Louis SHO
Rollin' coal
....Lag is just the tease.
What you are experiencing is probably not lag, but the electronic throttle not doing what your foot wants. The turbos are very small so unless you force the car in a higher gear at lower rpms the lag should be non existent. Electronic throttles are better for manufacturers because they have a lot more control over the car, but the consumer loses out. It's a good technology, but it is far from perfect.
gregoire
Member
Even before the tune I had been very impressed how quickly the power and torque was apparent once the accelerator was depressed.
Installed the Livernois stage 2 today and tested it out before coming to work. From a dead stop, power braked to around 1700 RPM, let go and HOLY CATHEDRAL! That 4300 lb beast had my attention from the get-go. I lifted at around 60-70 MPH and was given no indication that it was anywhere near leveling out.
Needless to say, first impression >
RealityCheck
Member
Same here. I've had a couple Dodge Stealth TTs, and even with small turbos the lag was quite noticable. I currently have a 2009 WRX, and the turbo lag is clearly there. I recently drove a BMW 335i and it too had very noticable turbo lag. Honestly, if I didn't know my 2011 SHO was turbocharged, I would have never guessed that it was. It exhibits zero characteristics typical of turbocharged vehicles. Lag is totally non-existent. In fact, the SHO's power delivery reminds me of a roots-type supercharger powered vehicle. I had a 2000 Lightning and 2001 Buick Regal GS, both supercharged, and both delivered power in a strong, steady surge - like the SHO. In fact, the SHO is a lot like my friend's 2010 CTS-V in terms of instantly available power (although the SHO has a lot less of it than the CTS-V).
To the OP - if what you are feeling is truly turbo lag, something is wrong with your car. Perhaps a better description of your symptoms would be helpful. Are you talking about slow takeoff from a stop? A jump in power as the engine revs build? Softness in power delivery following a shift? Something else?
SHOrod
Torrie Tuned
You might try turning off the stability control (on my 2011 it's a button top center of the dash that reads "TCS Off") and see if the slow takeoff is still as noticeable. Maybe you are getting so much wheel spin with the stock F1s that the traction control is kicking in.
-Rod
-Rod
Showgun
Canuck SHO
Welcome RealityCheck, and great questions. Hope to hear much more from you.
Cheers,
Showgun
Canuck SHO
....but fast enough that you think there is some turbo lag......hmmm, Is it possible that you were on slippery surface? Is the condition reproduceable?
As SHOrod suggests: try turnig off the TCS -- you may be getting some wheelspin ....
zeus268
Maple Leaf SHO
Are you kidding me?? The twin turbo in the BMW does NOT have noticeable turbo lag at all! There's no concessions here.....the turbo lag was almost non-existent in my 535ix and I drove it for 2 years. I should know.
I don't mean to be a ***** however this is one of the worst statements that I've ever read and I had to speak up. Besides the Ecoboost in the SHO, the twin turbo inline 6 in my 535 was the most remarkable turbo-charged engine that I've ever owned. The amount of turbo lag that engine had was extremely insignificant and certainly not "noticeable" at all......
This reminds me of people who say that they can "feel" the cylinder deactivation in a Hemi V8 engine that cuts down to 4 cylinders. They tested this with race car drivers and computers that couldn't tell the difference......
If the BMW turbo's lag is so noticeable, I can't see how you think the SHO is any better? In my experience they both have little to no lag at all...... just sayin'
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RealityCheck
Member
I stand by my statement. The 335 felt very soft at lower rpms and didn't start pulling strongly until the upper half of the rev range. Not impressed. Compared to an SHO, the 335 has substantial turbo lag. It certainly wasn't as pronounced as in my stage 2 2009 WRX (comparable straight line performance to a 335i), where there is a very noticable mid-range hit when the turbo spools up, but the 335's power delivery is nothing like the smooth wall of power produced by the SHO. Drive a 335 at part throttle and it feels like a Civic. No such problem in the SHO. Perhaps the 535 is tuned differently, but turbo lag in the 335 is definitely noticable. It's possible the car I drove had a tune (it was a used car at a dealer). I know my WRX had less turbo lag in stock form than it did with a stage 2 tune. Food for thought: in my experience, C&D's 5-60mph acceleration test is a good indication of a car's power delivery. The SHO does 0-60 in 5.2 seconds and 5-60 in 5.7 seconds, a difference of .5 seconds. The 335i (not the AWD version) does 0-60 in 4.8 seconds and 5-60 in 5.5 seconds, a .7 second delta. A stage 2 WRX does 0-60 in 4.4 seconds and 5-60 in 5.8 seconds, a whopping 1.4 second delta. Having driven an example of each of these cars, I can verify that there is a very clear relationship between the 0-60/5-60 delta and turbo lag. The bigger the delta, the more noticable the lag. On the other extreme, a Cadillac CTS-V's 0-60/5-60 (3.9/4.1) delta is only .2 seconds. Having spent a fair amount of time behind the wheel of a CTS-V, I can say that it's power delivery (not quantity, the CTS-V obviously has much more) is much closer to the SHO's than it is to 335i or WRX. Of course, the the CTS-V has no turbo lag because it has no turbo, but I think you can see my point.
To me, the SHO's lag-free, mountain-of-torque, instant throttle response engine is it's most appealing feature. If it had 335i-like power delivery, I'd be driving something else.
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