High Rev issue!

[Yezinki]

Have an occasional habit of driving my 9th Gen Corolla with a high rev rapid acceleration.

The thing I have noted is that in stick shift gear 1, rev it up to 6K RPM than 2 again to approx 5-6K RPM & than directly to gear 5…..this probably is known as trying to drag I think…….correct me if am wrong?

During this process/style of driving the front part of my vehicle sways(vibrates, becomes unstable/shaky) a bit to both the sides…..........like a plane trying to take off after taxing........what could be the possible reasons for that….it’s mostly all stock till now.

Steering column , Suspension related no strut braces front or rear, no alignment bars, coils, bad alloys, wrong tires or bad/wrong driving habits…..etc?

Wheels are perfectly aligned & the tires done only 12K miles.

Any suggestions would be appreciated.

Yezinki.

[02zx9r]

to avoid this:
"During this process/style of driving the front part of my vehicle sways(vibrates, becomes unstable/shaky) a bit to both the sides…..........like a plane trying to take off after taxing........what could be the possible reasons for that…"

I would shift like a normal person and drive the car in a sensable manner. It is not a race car, it is a reliable, economical commuter car, nothing more.

[Yezinki]

Thanks for the suggestion....to which I agree.......btw I have clocked 125mph on this nice vehicle.

[tigerclaws1318]

125mph? The speedo doesnt even read up to 125mph and for some reason I seriously doubt the corolla can reach that speed.

[TrdSpeed140]

it can going downhill! haha

[Yezinki]

Originally Posted by tigerclaws1318

125mph? The speedo doesnt even read up to 125mph and for some reason I seriously doubt the corolla can reach that speed.

Speedo’s max is 220km…….clocked 200km at 6.4K RPM ……200 X 5/8 conversion to miles=125mph……..conversion formula from km to miles.

Suggest your expert tech comments to improve the suspension/ reduce sway, vibration etc……to whatever they concern with……like suspension, wheels or tires?

[mikered30]

Yezinki, where was your car made? Is it a 9th gen US Corolla? XRS perhaps? The speedo in a US 9th gen 1zz fe corolla only goes to 110 mph (177 Km/h) and limited at 112 mph.

[Yezinki]

Correct both...... XRS.

I shall appreciate if my forum colleagues try to help me find solutions/answers to this thread & ones on Replacing tire & alloys, stock exhaust, Display LEDs,Dyno softwares, strut bars / suspension parts.....unresolved posts.
Thanks.

[Exage]

It's not a XRS or else your engine cover would read VVTL-i. You're previous pictures in the SC thread showed me that... But it is RHD which is interesting to say the least.

[Yezinki]

You must be correct Exage, could be a S or whatever, since you are an expert, but defiantly is RHD ……this is my wife’s vehicle…..& am the one having to keep it up & running good……….could you care to reply to my posts on High Rev, replacing Tires & alloys, Stock exhaust, Dyno softwares, strut bars etc.
I got the fuel cut system nonfunctional or whatever it’s called.
Thanks.

[JasonA]

The US-spec Corollas are limited to 112 MPH because of the stock tires (S speed rated).

Overseas Corollas probably come with H rated tires (even the base models), and likely have a higher speed limiter.

[silver04rollas]

Exactly. I used to own a Corolla S(1ZZ) and anything over 80 mph (cross winds, for example) would make the car very easily sway side to side. I would recommend staying away from such adventures since the suspension, steering rack and tires are all meant to be driven at a conservative speeds and at a conservative rate of acceleration.

The XRS is a different beast though. The faster the engine revs, the tighter the steering and suspension gets (variable stiffness shocks on XRS). With very little weight transfer front to back, the nose stays planted as close to the ground even under hard acceleration.

Originally Posted by Exage

It's not a XRS or else your engine cover would read VVTL-i. You're previous pictures in the SC thread showed me that... But it is RHD which is interesting to say the least.

[Yezinki]

Thanks silver04rollas for sharing your experienced comments. My vehicle doesn’t sway at 125mph but when I rev it from 0-60…… I agree about the role of crosswinds being a factor to sway, at a constant 125 mph in gear 5 @ 6.3KRPM on a highway………. Are the struts different in specs for a RHD……..what exactly do you imply by light weight rims 18lbs plus??...what are your thoughts about struts & stabilizing/alignment bars for 1 ZZFE. Interested to know the best time clocked from 0-60mph……with all your mods……half gas tank…..without spare wheel etc.........what should the inlet of replacement exhaust be...stock is 2".....2.25", 2.5" or 3"?

[silver04rollas]

- I would still recommend you keeping under 100 mph since 1ZZ Corollas in most region do not have the all-season tire speed rating to handle 120+ mph.

- The strut specs could be different. However, they are not dependent on your RHD or LHD, but rather the region you live in. I have been to several Asian countries with small very bumpy roads so naturally the springs are very soft on Corollas over there and use small wheels with ultra thick tires. So it all depends on which region you live in.

- By lightweight rims, I mean exactly that. I put aftermarket rims on, which weigh 4 lbs each less than the stock XRS wheels. Plus the aftermarket rims are 1 inch wider per wheel. This helps in getting even better grip than stock XRS. The lightweight of the wheels helps improve the throttle response even more and the car revs to redline much quicker due to reduced rotational mass.

- I guess, your struts, stabilizer bars etc. might be different from the North America 1ZZ Corolla since they are manufactured to different specs so it might be hard for me to say. However, the North American 1ZZ has decent struts, springs and stabilizer bars for spirited driving around the city. Actually, after looking at a chart of XRS vs S/CE/LE shock rebound rate by Toyota, the XRS shocks rebound is very similar to 1ZZ uptill 20 - 30 mph where the XRS shocks begin to stiffen up at a very fast rate.

The 1ZZ shocks are kind of inadequate when the car is pushed to the limit at higher speeds where typical behavior I observed in my previous 1ZZ was completely numb steering without feedback, a lot of bodyroll in sharp turns, unpredictable weight transfer (nose dives and front end ploughs in turns badly).


- I have not really measured my 0-60. Just have been to the drag strip a couple of times where the time to distance (1/4 mile) and speed is measured. 0-60 is not one of them. However, using my quartermile and trap speed, an estimate of 0-60 mph can be generated, which comes out to be between 6.5 - 6.7 secs. By the way, I had run the drag strip with no spare, 1/4 tank of gas.

- Stock exhaust inlet for both 1ZZ and XRS is the same 2 inches. I would go with either 2.25 inches or 2.5 inches maximum. Mine is 2.25 inches because I do not want to be very loud in city driving. Don't think about 3 inches.

Originally Posted by Yezinki

Thanks silver04rollas for sharing your experienced comments. My vehicle doesn’t sway at 125mph but when I rev it from 0-60…… I agree about the role of crosswinds being a factor to sway, at a constant 125 mph in gear 5 @ 6.3KRPM on a highway………. Are the struts different in specs for a RHD……..what exactly do you imply by light weight rims 18lbs plus??...what are your thoughts about struts & stabilizing/alignment bars for 1 ZZFE. Interested to know the best time clocked from 0-60mph……with all your mods……half gas tank…..without spare wheel etc.........what should the inlet of replacement exhaust be...stock is 2".....2.25", 2.5" or 3"?

[Yezinki]

1. Firstly thanks again for sharing your views.
2. Suggest a few all season tires with speed ratings to handle +120mph.
3. If supposing the struts aren’t dependent on RHD or LHD….they should fit on my RHD……….are there more parts to add/mod/replace, while installing struts?
4. I agree & understand since had the chance to work in Asia for a decade. Mostly people drive with smaller rims 14-17”& larger softer tires 60-65, cause of the conditions, in their Corollas & Civics.
5. In which areas would North American struts & bars differ & why……what specs would I need to check whether they would fit?
6. 6.5 secs isn’t that bad.
7. Would you care to have a look at my thread on stock exhaust which would be appreciated? How do you rate Flow master exhausts?
8. Is there a camming device for vehicles that could be mounted in….like RDs?
9. I live in the state of Hawaii but still shuttle across due to the nature of my job.