An affordable rear gear of rear end?

[pretzelboy]

I would love to lose all the freeway flyer top end of this car for a in town rocket ship...anyone sell mondo gears for the rear end.......I love the car at 4000 rpm...but waiting to get there is

[Fenvy]

huh?

[Jesda]

Do a search for the 4.08 rear end. Greg has it on his Q. I dont remember if Wes does. Picks up on the low end.

I think I'd have to be crazy to want more power off the line. I have a hard enough time keeping traction!

[pretzelboy]

Had a gsxr 1000 with 145 rwhp and weighed in at 440lbs....Q is a tad slow......

[maxnix]

Put three other people in/on both, then report back.

If you want a faster car, get a smaller lighter car. Much less expensive to get quick straight line numbers for short distances. The Q45 is designed for doing 800 miles per day on the open road and not even noticing it when you arrive at your destination. It is most definitely not designed for the dragstrip.

[rsiwicki]

it will cost ya around a cool $1,000 at least to change the rearend ratio from a 3.54 to a 4.08. Only one company so far has done it successfully located in Cali. They charge $1,200 and use to do the Stillen conversions. So far nobody else has done it successfully.

It will make the car a very fun street light racer. I had it installed in my car for a week and loved every part of it. It really transforms the car. Mine was not put together correctly so I had to take it out. I went the cheap price versus quality route and lost. Nothing is cheap for the Q.

Here is the website for Unitrax and maybe worth your while since you live in Cali so you would not have to pay for shipping. Me....I would have to pay for round trip shipping from Miami, FL which would be very expensive on top of the $1,200 charge.

wwww.gounitrax.com

[pretzelboy]

thanks....sure about link? Doesn't work.

[rsiwicki]

http://www.gounitrax.com/main.html

[pretzelboy]

Anything bigger than 4:08? I wanna put a giggle on my face...when I test drove a Turbo Forester-Subaru......that thing made me laugh every time I punched it....it does high 13's stock at like 97....that would be a good starting point for me.

[rsiwicki]

you can try the next gearing a 4.36 but the car will not be driveable on the freeway for long periods of time. You will be running 23% higher rpms than stock at the same speed. So 2,5,00rpms cruising on the freeway becomes 3,075rpms. Too much for my tastes.

The 4.08 will do you just fine.

[pretzelboy]

....and I was thinking 4:88 I don't go on the freeway much.

[jamesmost]

i understand you will have a more profound effect by installing a higher stall rate torque converter

[Q45tech]

Nothing beats torque multiplication [via gears].........most 5-6-7 speed automatics now have a 12.3-13.3:1 1st gear vs. our 9.85 [90-93Q].

25>35% more rear wheel torque at launch [engine multiplied by gear ratio]gets those zero to 35 mph times down by a second.

Excessive Torque multiplication via TC vane angle hurts highway economy and un-stalled power transmission efficiency.

[elwesso]

I have a high stall and no 4.08 and its nice but still leaves me hanging for a little more... 408 would be nice, and as i understand, no reason to go any higher.....

As I understand it, the billet torque converters you can get from IPT or level ten should be just as efficient at highway cruise because they design them from scratch rather than using the OEM design modified.....

[jamesmost]

pat from level 10 in a conversation about 2 yrs ago told me that the 408 rear is insignificant compares to his torque convertor he said he wowld guarantee a dyno tested 8/10ths to 1 second off 0-60 and that he dyno tested and drove one of rex,s rears and it did next to nothing except drive up rpm's and rex was the one who introduced me to pat- funny?

[elwesso]

pat from level 10 in a conversation about 2 yrs ago told me that the 408 rear is insignificant compares to his torque convertor he said he wowld guarantee a dyno tested 8/10ths to 1 second off 0-60 and that he dyno tested and drove one of rex,s rears and it did next to nothing except drive up rpm's and rex was the one who introduced me to pat- funny?

Interesting James... did he recommend a certain stall speed??

[Q45tech]

Dyno test on zero to 60 have no meaningful comparison to real world on road zero to 60, because the dyno drum doesn't load the engine significantly. [enough]...........the big cheat.

He was counting on your lack of expertise to sell you something.

But I agree a 4.083 is only 15.4% higher thus the torque will be 15.4% higher at the tire road interface [less any added friction] and acceleration will approximate a cube root function ~~~2.5% improved......couple of tenths of a second to 60.

A real fast shifting transmission gear set optimized for 35 [1st] and 65 mph [2nd] shifts will probably reduce time by close to 0.8 second...........that would require the equivalence of a 4.88 with a 90-93 RE4R03A transmission.

But the stock transmission shifts too slow to match a modern 5-6 speed so ~~0.5 second zero to 60 improvement with just changing rear gear to 4.88.......there is 0.9 seconds wasted in the 1st to 2nd shift till the power comes back that can easily be trimmed with software and valve body mods.

Modern trannies shift in 0.4 seconds not 0.9.

Where most of gain from new M45 comes from the transmission and gear set selection.

[elwesso]

I have to say while a higher stall really doesnt improve your 0-60 times (and can decrease 50-80; unless you use a billet), it certainly does make the car more fun to drive.. There isnt that common lugging around 30mph in 2nd gear..... It really does help fill in the dead spots.....

Ideally youd probably want both...

Dennis, do you think if you could somehow match the gears right that the Q could be a 13 second car with the right gears alone?

[jamesmost]

q45 tech - my mistake he said .8 in the 1/4 on the track - wes i think he was talping around 2800 - 3200 hard to remember -

[pretzelboy]

Q45---Your replys are enjoyable to read(I must admit that I have to read slowly and sometimes twice or thrice to get all the info).

[nissanforlife]

Q45---Your replys are enjoyable to read(I must admit that I have to read slowly and sometimes twice or thrice to get all the info).

yes, we all love Tech.. although it most often sounds like he's speaking a foreign language.. lol.. if i'm tired.. i come back to it later when i can think.. haha..

hehehe. . he's a thought.. why don't we make a Q with a 512 and 3200 rpm billet and a hard shifter... dont even think about the highway.. but.. man.. better have some slicks.. (especially if it has the supercharger kit and NOS)..

[maxnix]

... dont even think about the highway..

Ah, but that is what the Q45 is all about. Few cars can match it's cruising comfort and performance, no matter how modified the other cars may be.

A much more difficult to attain performance goal than a short 1/4 mile blast.

[jamesmost]

rob its james in NY i lost your e-mail and # wanted to chat drop a line or e-mail [email protected]

[diamond]

ive noticed that driving 1000 miles at a time at 3,200 rpm,cats wear out real fast.burns um right up fast.burned out hiflow carsounds in one year.at cruise 2750-3200..something to think about maybe.d

[911/Q45]

Aftermarket cats are notoriously short lived.

[pretzelboy]

Who drives on the freeway anyway

[diamond]

still got 40k out of them.just real fast.i drive the freeway,lol

[pretzelboy]

oem or bust