Round 2 Checklist, am i missing something? Options

[easternpiro1]

hey guys, was trying to get my thoughts together for when i get the NT2 back. I believe ive got the necessities out of the way, and i will list what i have, please feel free to add anything i may need later or forgotten.

i plan on dyno tuning it very soon after reciveing it so i may consider pushing the dyno date back if i add water/meth soon enough.

I have:
4th gen 3sgte

Emanage blue EMS
Areomotive FPR
Koyo racing radiator
550cc injectors (stock should be enough?)
AIR/garett t3/t4 turbo
tial 38 wastegate
3inch exhaust from turbo back (mandrel bent)
turbo xs manual boost controller
turbo xs RFL BOV RICE?!
Appropriate gauges...boost,oil temp, AEM wideband
stage 2 clutch (s54 tranny)

power goals: 320-350 (i know i know, i need a mr2 tranny)
whp before swap:266/255tq@ 15psi on ct20b (stock boost level)

hopefully will be boosting 15-18 lbs w/ new turbo setup hopefully the intake manifold will hold up (crack repaired) and hopefully i shouldnt have any boost issues with the w/g placement


tips? suggestions?
I appreciate all your imput! (no flame please!)

[Dr_Tweak]

Except that the LSD in the MR2 tranny is designed for RWD use, not really a good idea. Get a Camry/Solara E153 and a Quaife, and be done with it

-Doc

[_Jim_]

Except that the LSD in the MR2 tranny is designed for RWD use, not really a good idea. Get a Camry/Solara E153 and a Quaife, and be done with it

-Doc

WTF does that mean? The MR2 LSD tranny is a great choice, I am currently running it and havent had the slightest issue....Do you think that because the MR2 is "RWD" that it would make a difference? If that is the case then I am sorry but you are misinformed. Its a mid engine car, so it doesnt have drive shafts, the axles go directly into the Tranny just like a FWD setup.

And why would you suggest buying a NON-LSD to install an LSD into, when you can just buy an LSD to start with? That doesn't make sense. A NON-LSD will run you about 400$ plus 1200$ for the quaife diff you suggested (http://www.nolimitmotorsport.com/prod/QDF17E) plus Axles 200, plus having the cost of having the new LSD installed (if you dont do it yourself) Totaling over 1600, that does NOT included the cost of swapping out the Differential to the New LSD.

Or you can just buy an LSD tranny with axles for around 1000-1400 and be DONE with it.

[Dr_Tweak]

Except that the LSD in the MR2 tranny is designed for RWD use, not really a good idea. Get a Camry/Solara E153 and a Quaife, and be done with it

-Doc

WTF does that mean? The MR2 LSD tranny is a great choice, I am currently running it and havent had the slightest issue....Do you think that because the MR2 is "RWD" that it would make a difference? If that is the case then I am sorry but you are misinformed. Its a mid engine car, so it doesnt have drive shafts, the axles go directly into the Tranny just like a FWD setup.

And why would you suggest buying a NON-LSD to install an LSD into, when you can just buy an LSD to start with? That doesn't make sense. A NON-LSD will run you about 400$ plus 1200$ for the quaife diff you suggested (http://www.nolimitmotorsport.com/prod/QDF17E) plus Axles 200, plus having the cost of having the new LSD installed (if you dont do it yourself) Totaling over 1600, that does NOT included the cost of swapping out the Differential to the New LSD.

Or you can just buy an LSD tranny with axles for around 1000-1400 and be DONE with it.

In a FWD, it's important to use a gear-type LSD, also called a Helical Gear LSD or an ATB (automatic torque biasing) differential, because the wheels are you applying the power to are also the wheels that steer the car. In a RWD, this isn't a concern and so LSDs for RWD vehicle are usually more of a "locker" type or clutch type, which if used in a FWD car, could cause a dangerous condition in certain situations, such as corning in slippery conditions. I'm quite sure that the LSD in the MR2 transmission is of this type (since there is a visible "diff pin" in the axle hole), although I suppose I could be wrong. I've had some conversations with people using the MR2 LSD in FWD use and it giving them a lot of problems.

It's very important to understand that there are MANY different types of differentials and they all work differently, and are typically made for different uses. The Quaife LSD is specifically designed to work in FWD use as well as RWD, as a torque biasing differential it does not "lock" but smoothly transfers torque (torque biasing) from one wheel to the other, up to over 90% to whichever wheel has more traction. Using a Quaife is DEFINITELY more expensive. Doing things right the first time usually is (Plus, the Quaife has a lifetime warranty )

LOL, I'm well aware of the setup of an MR2, thank you

-Doc

*edit*

This conversation inspired me to sit down and do some research on what type the OEM LSD in the MR2 transmission is. It seems that there's no clear answer, most of the gen 2 engines have transmissions with a viscous coupling LSD, but it seems that the gen 3 engines often, but not always, come with an aftermarket clutch-type LSD. This may explain the variation in the results people are getting when using an MR2 LSD in a FWD Celica: the viscous coupling LSD will probably work just fine (although not nearly as effectively as a Quaife), whereas the clutch-type is going to give potential problems in FWD daily-driven use. With all the questions and confusion, it makes a lot of sense to spend a couple hundred bucks more to put a Quaife into a transmission already set up for FWD and be done with it. Then you KNOW that you have the best LSD you can get

-Doc

This post has been edited by Dr_Tweak: Jan 28, 2009 - 11:20 AM