Lack of power - gen 4.5 v. gen 3 - Toyota Nation Forum : Toyota Car and Truck Forums

skewe · 03-19-2005, 04:35 PM

I just bought a gen 4.5 about 4 months ago. I also own a gen 3.

I feel that the gen 4.5 has less power than the gen 3.
After buying it, i have not floored the gen 4 till recently. At the stop lights, flooring gen 4.5 will not spin the wheels but as for the gen 3, flooring it will definately spin the wheels. (not talking about reving the engine and hitting it into D, I am just refering to having the car in D and then flooring the gas when the light turns green)

I put in larger rims/tires on the gen 4.5. 215/16/60. Everything else is stock but I did clean air intake manifold, did a toyota dealer fuel injector cleaning, etc.

On the other hand, everything on gen 3 is stock. i know that the body is heavier for gen 4.5 than the gen 3 and also the tire diff.

anybody feel that gen 4 has less power than gen 3?
are you able to spin the wheels on gen 4?

bowlofturtle · 03-19-2005, 04:38 PM

not sure whats going on with your car. but from what i thought gen4's are normal a little quicker then a gen3 but very very slighty.

skewe · 03-19-2005, 04:44 PM

Quote:

Originally Posted by bowlofturtle

not sure whats going on with your car. but from what i thought gen4's are normal a little quicker then a gen3 but very very slighty.

personally, i feel that the gen 3 is quicker on the take off but maybe there is a small prob with the gen 4.

Ruffrydasean · 03-19-2005, 05:03 PM

they're both 4 cyl?

***Eye8Pussies*** · 03-19-2005, 05:09 PM

it's probably all in your mind...

but having bigger rims and tires will make a difference when it comes to being able to spin your wheels or not- the added weight is important. Also, if the tires on your gen3 are crappy, you can spin them all day long possibly

I presume that they are both i4s?

and if anything, the gen3 is lighter than the gen4s...the camrys have gotten heavier as they've changed

95camguy · 03-19-2005, 05:29 PM

^^^^^ i agree

the bigger tires and wheels make a difference. also i did some research and found out that with the tire wheel combo you have on your gen4.5 will actually make your speedo read 2.6% too slow. that means when your speedo reads 60mph you are actually traveling at 61.6mph. a taller tire will also effect your gear ratios which will certainly change acceleration characteristics. when you need new tires you should try 215/55/16 to put it closer to the stock tire diameter. even the 215/55's would make your speedo off by .7% but its better.

edit: above calculations were determined coutesy of: http://www.miata.net/garage/tirecalc.html

skewe · 03-19-2005, 06:20 PM

Both are 4 cyl.

I have goodyear regatta 2 on the gen 3. I think they are OK but still able to spin the wheel when i accelate from a stand still. Not possible to do so with gen 4.

skewe · 03-19-2005, 06:29 PM

agree with the wider dimension and weight of the gen 4 tires. 215/16/60 as opposed to 195/15/70 on gen 3. not worried about crusing speed or acc. when cruising.

thanks for the tire calculation. i got these rims/tires off a 2004 camry SE. so i will have to wait. Not worried about speed difference. concerned about standstill acc.

thx

Quote:

Originally Posted by 95camguy

^^^^^ i agree

the bigger tires and wheels make a difference. also i did some research and found out that with the tire wheel combo you have on your gen4.5 will actually make your speedo read 2.6% too slow. that means when your speedo reads 60mph you are actually traveling at 61.6mph. a taller tire will also effect your gear ratios which will certainly change acceleration characteristics. when you need new tires you should try 215/55/16 to put it closer to the stock tire diameter. even the 215/55's would make your speedo off by .7% but its better.

edit: above calculations were determined coutesy of: http://www.miata.net/garage/tirecalc.html

Ken4 · 03-19-2005, 06:40 PM

I put heavy Enkei Aegis 215/50/17" rims on my Gen 4.5 and the 0-100kph was a slow 12.65 secs. Now I have super lightweight SprintHart CP-035 205/65/15" and the 0-100kph has improved to 11.2 secs. And now I can get some wheelspin when I floor it from a standing start.

fredk · 03-19-2005, 09:39 PM

the tire rubber makeup has alot to do with grip also, softer rubber like in a slick or treadded slick makes them very grippy, and long treadlife tires with harder rubber will spin easier, normally a hi performance tire is softer than like a touring or truck tire

CrawlingEye · 03-19-2005, 10:07 PM

figure it's the heavier weight added with stricter emissions. these two will make the gen3 a faster car.

CamryWhat? · 03-19-2005, 10:47 PM

^ Emissions with cars keeps getting worst....so thats probly why i am guessing they had to tune it down more... Heavier car, stricked emissions, plus 16's will make a big deal in how fast your car is....If you ever get an hour to do this... switch your rims to the gen 3 and see if it still tkaes off the same then that might make a differents... Also your 4.5 could not be completely broken in.