Getting the is350 under 5 seconds 0-60
10-09-20, 02:33 PM
#1
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Getting the is350 under 5 seconds 0-60
What does it take to get the is350 below 5 seconds or under 13 seconds 1/4 mile? Is it possible/easy to do and would any of it void warranty? Are there piggyback tunes available?
10-09-20, 02:40 PM
#2
don't tune it.. you'll see people complaining about issues after the tune on the forum. tune only adds a few horsepower and changes redline to 7200 rpm for $500.. risking issues with your vehicle for minimum gains, can't be me. tough to do any performance mods to these cars tbh
The following 2 users liked this post by swaangin:
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Ismelllike (10-09-20)
10-09-20, 02:49 PM
#3
Lexus Test Driver
Enjoy it stock for what it is. Very nice from the factory.
You'll never go as fast as you want, especially not without serious compromise.
You'll never go as fast as you want, especially not without serious compromise.
10-09-20, 04:13 PM
#4
There is the RR-racing/D3 tunes, bolt ons, lighter rims/tires, you can do. Calling up RR racing and talking to them is probably going to be your best bet with regards as to what is best to do to achieve what your looking for. There was a guy that posted in one of the tune threads in late august/early September that said he was getting just over 5 sec 0-60 on his AWD IS with the RR racing tune, exhaust, (maybe some lighter rims too, can't remember) and was told by RR racing that headers could get him from mid to high 4 sec 0-60. Personally I have a AWD IS with a F sport intake/axle back + RR racing tune that I'm getting low to mid 5 0-60 times with.My testing was done using stock rims and heavy cheap tires put on from the dealer that are set to be changed in the coming week.
10-09-20, 04:36 PM
#5
Lexus Test Driver
I don't think the feeling between 5.5s vs 5s flat isn't all that great. It's only like a 30hp difference at the wheels to get that right. Doesn't seem like spending thousand dollars on that is worth it.
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Ismelllike (10-11-20)
10-09-20, 06:51 PM
#6
don't tune it.. you'll see people complaining about issues after the tune on the forum. tune only adds a few horsepower and changes redline to 7200 rpm for $500.. risking issues with your vehicle for minimum gains, can't be me. tough to do any performance mods to these cars tbh
With regards to the OPs question, I believe the biggest hinderence for you to achieving a 0-60 time of under 5 secs and a 1/4 mile time is the final drive ratio used on the 3rd Gen IS350. Even with Full Bolt Ons (FBO) and a tune, the 3rd Gen IS350 struggles to break these thresholds. If a shorter final drive ratio can be swapped (along with being FBO+Tuned), it's very possible to achieve these metrics.
Case in point, the 2nd Gen IS350 has the same engine and fairly similar dimension and weight but when tuned and FBO, it is capable of 0-60 in the low/mid 4s and high 12s in the 1/4 mile (this is my FBO+Tune 2IS350 as an example):
I attribute the acceleration differences between the two generations to the gearing as the 2IS350 is statistically quicker from 0-110mph than the 3IS350. If someone can swap the final drive ratio to a more aggressive version (an old hot rodder technique), you'll see a big improvement in acceleration. My two cents.
Last edited by redspencer; 10-09-20 at 07:03 PM.
10-09-20, 07:08 PM
#7
Instructor
Expensive. Fastest stock time I’ve seen was a 2014 350 AWD doing 0-60 in 5.3 by MotorTrend magazine. Realistically you’ll need headers, exhaust and tune and even then don’t know if you’d be sub 5. They are so heavy and don’t have a lot of torque...not ideal for 0-60.
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10-10-20, 12:41 AM
#8
A shorter differential gearing would be the easiest way to go. Engine output is multiplied by your transmission ratio and then your final drive/differential ratio to equal torque to the ground. Increase your final drive ratio and your are increasing torque without touching the engine and that equals faster acceleration. That's assuming you can maintain contact with the ground. The downside is a higher rpm for a given mph but there usually is a happy compromise between the two.
About a 15% difference should result in a huge improvement. Stock gearing is 3.13 so going to somewhere in the 3.59 range should be nice. On my last car I did a 3.06 to a 3.91 and the difference was insane but the revs got a but too high on the highway.
I would check if there are any drop-in differentials or gears available (with a qualified installer if it's the gears themselves).
You can also replicate this with a smaller overall tire diameter but there's only so small you can go.
About a 15% difference should result in a huge improvement. Stock gearing is 3.13 so going to somewhere in the 3.59 range should be nice. On my last car I did a 3.06 to a 3.91 and the difference was insane but the revs got a but too high on the highway.
I would check if there are any drop-in differentials or gears available (with a qualified installer if it's the gears themselves).
You can also replicate this with a smaller overall tire diameter but there's only so small you can go.
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redspencer (10-10-20)
10-10-20, 07:26 AM
#9
Instructor
A shorter differential gearing would be the easiest way to go. Engine output is multiplied by your transmission ratio and then your final drive/differential ratio to equal torque to the ground. Increase your final drive ratio and your are increasing torque without touching the engine and that equals faster acceleration. That's assuming you can maintain contact with the ground. The downside is a higher rpm for a given mph but there usually is a happy compromise between the two.
About a 15% difference should result in a huge improvement. Stock gearing is 3.13 so going to somewhere in the 3.59 range should be nice. On my last car I did a 3.06 to a 3.91 and the difference was insane but the revs got a but too high on the highway.
I would check if there are any drop-in differentials or gears available (with a qualified installer if it's the gears themselves).
You can also replicate this with a smaller overall tire diameter but there's only so small you can go.
About a 15% difference should result in a huge improvement. Stock gearing is 3.13 so going to somewhere in the 3.59 range should be nice. On my last car I did a 3.06 to a 3.91 and the difference was insane but the revs got a but too high on the highway.
I would check if there are any drop-in differentials or gears available (with a qualified installer if it's the gears themselves).
You can also replicate this with a smaller overall tire diameter but there's only so small you can go.
10-11-20, 01:34 AM
#12
I haven't mapped out the other gears fully but you will hit 60 in 2nd so a tune that raises your shift point would likely be beneficial. The vehicle would stay in 1st longer and enjoy the extra torque multiplication of 1st vs. 2nd gear for more acceleration.
The engine may not be in its peak torque range at that higher rpm but it's likely that the higher torque multiplication in 1st gear will make up for that.
Overall, your torque to the ground (engine output × transmission ratio × final drive) will be higher over that additional mph range that a higher rpm shift point would deliver.
Last edited by BMGS; 10-11-20 at 02:00 AM.
10-11-20, 01:28 PM
#13
Instructor
Buy Audi RS3, you'll do 0-60 under 5 sec and beat every Lexus out there, lol
10-11-20, 04:04 PM
#15
Not only is it RCF/CPO GSF money. It's a Audi...Good luck with it out of warranty. And when something dose go wrong, have fun pulling the entire front of the car off to do anything. When I had my S4 I drove the 2.0T A6 loaner car almost as much as the S4 I bought.
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llO0DQLE (09-29-23)