CUSCO 4.55 FINAL DRIVE installed.

[Nightbringer]

Originally Posted by Racecomp Engineering

An S2k at 3500 rpms sounds like a cow farting after eating a bowl of beans !

ROFL. Thanks for this.

I need to do the math on what the 5.12 set would do in an auto at 75 MPH. Wondering how livable it would be. I plan to eventually go FI and turbo would certainly love the long stock gearing, but I'll be bolt-on only for a few years and would love to throw some gear at it just to be a stoplight hooligan.

[DoctorNick]

Would a tune be recommended for a bone stock car with a FD conversion? Or can I get away with just the conversion?

[p00mba]

Originally Posted by Racecomp Engineering

I think the 4.55 is the best all around for mild FI....like 250whp. But more than that and I think the stock ratio allows for more "in gear" pulls. The short gear ratios I think are fine for SERIOUS 200+ WHP Na power. As you need it to keep you in between 6500 and 7500 rpms like Porsche does with their stock trans. My old Boxster S once you shifted from 1 to 2nd....kept revs in the sweet power band and THAT is why it was SOO fast with only 265 CRANK and 2900 lbs, But with headers our cars have a nice fat power band from 4500-7000 that should be exploited for sure. Now more than ever I love short shifting my car like a fire truck ! 3500-4500 rpm shifts make S2000 guys roll their eyes !
An S2k at 3500 rpms sounds like a cow farting after eating a bowl of beans !

Mw

debating if i should do 4.55 FD with my vortech setup... i kinda want too lol... not sure how it'd feel tho and if it'll make it better or worse...

[Asurendra]

Hi mates,

Sorry to necro; regarding the shims, I note you purchased all twenty two: which part number or clearance size did you end up fitting?

Putting a 2-way + 4.556 in and would prefer to have the shim ordered in advance!

Thanks

AJ

[TouchMyHonda]

Hummmmm so is there part numbers for the is 300 own 4.556?

[37]

Originally Posted by Racecomp Engineering

The short gear ratios I think are fine for SERIOUS 200+ WHP Na power.

But, would you go shorter than 4.556 if given the opportunity?

I like that the 4.556 set is OEM Toyota parts but can't help wondering if shorter might be better for track use. All of my local road courses are fairly short (save for Road America) so any loss in top speed is inconsequential.

Originally Posted by TouchMyHonda

Hummmmm so is there part numbers for the is 300 own 4.556?

The 4.556 is from a MKIII Supra.

This post might help: http://www.ft86club.com/forums/showp...1&postcount=24

[Racecomp Engineering]

Originally Posted by Asurendra

Hi mates,

Sorry to necro; regarding the shims, I note you purchased all twenty two: which part number or clearance size did you end up fitting?

Putting a 2-way + 4.556 in and would prefer to have the shim ordered in advance!

Thanks

AJ

doesnt work that way. Each car is different. A good tech wont even attempt to use one without measuring what is needed.

Mw

[Racecomp Engineering]

Originally Posted by modifier

But, would you go shorter than 4.556 if given the opportunity?

I think you have to back into this kinda mod and ask yourself...


" do I want to be tach-ing 4500 rpms' on the highway at like 65mph?.."

Right now I'm 80 and 4k with a top speed of 148. Once I am SC-ed I will hit that at the end of my straight at my local track. PERFECT !

Myles

[TouchMyHonda]

My oem 96itr trans with 98 JDM fd is at 5k at 80mph in 5th top gear... Thank god my redline is 9.3k RPM. Lol

[WolfsFang]

Would this be the OEM product?
http://quickparter.com/oem-parts/4120119557.html

[37]

Originally Posted by Racecomp Engineering

" do I want to be tach-ing 4500 rpms' on the highway at like 65mph?.."

My last car spun that with ease on the highway. I typically wore in-ear headphones on long trips since the exhaust drone was borderline damaging.

Originally Posted by Racecomp Engineering

Right now I'm 80 and 4k with a top speed of 148.

In 6th at 80 with a 4.556 you should be turning roughly 3700-3800 RPM depending on tire size. A 5.1 FD at 4000 RPMs in 6th should be going around 76 MPH. Both 76 and 80 are speeding around here so I'd probably err on the side of 76 anyway. I could live with 4000 Rs on 1-2 hour trips no problem.

I just hate to drop $800, R&R the pumpkin, and regret not going shorter.

Who makes a higher FD gear set than 4.556 besides MFactory's 4.67? Doesn't Cusco offer a 5.1 or am I imagining things? Anyone in the 4.8x/4.9x range?

[Racecomp Engineering]

I think for the average person.............the 4.55 works well. But yes a 5.1 is probably sick but remember that too short and now you are shifting constantly and thats slower laps etc. I can say after running my friend who I was side by side with prior to this upgrade that the in gear acceleration is improved enough that it was OBVIOUS to me it had been worth it. He is not on E85 and finally just as fast as me on pump. So the short path if on a budget is FD, Headers, ECUTEK tune and shave 100-150 lbs.

ORRR.....Forced Induction !

HA!

Mw

[37]

Ahh, shifting frequency... didn't consider that. Besides lap times that's X percentage of extra wear, which at the track can add up.

If you pulled away and it was obvious then an OEM 4.56 gear set sounds like a solid choice.

[Racecomp Engineering]

Originally Posted by modifier

Ahh, shifting frequency... didn't consider that. Besides lap times that's X percentage of extra wear, which at the track can add up.

If you pulled away and it was obvious then an OEM 4.56 gear set sounds like a solid choice.

yep..its like the first few moments of "happy time"......you KNOW its a good thing !

Myles

ps: you married guys know what "happy time" is. You single guys live it every day !