TT Conversion

[hot3000]

Hey can someone link me to a thread on a parts list and steps on how to do the TT Conversion? I've checked 3Si but I must be dumb because I couldn't find it

Im doing my research and trying to figure out if the hassle and money is too much to make it worth it.

And if it is worth it, I need to know what the hell it is im going to be doing, or will get done.

[hot3000]

Shit, my bad, I should have just checked the "Read before you ask" thread. Sorry!!!!!

[Linebckr49]

well leave this thread open to post any questions you have about the TT conversion. i just helped a friend do his TT conversion. well i practically did it for him, but he helped a lot. i plan on doing the TT conversion around christmas. but since i already have one under my belt, feel free to ask away... as detailed or broad a question you can conjure

[hot3000]

Originally Posted by Linebckr49

well leave this thread open to post any questions you have about the TT conversion. i just helped a friend do his TT conversion. well i practically did it for him, but he helped a lot. i plan on doing the TT conversion around christmas. but since i already have one under my belt, feel free to ask away... as detailed or broad a question you can conjure

cool thanks

[hot3000]

Before i really consider it too much and start thinking of coming up with funds for it, would it be just as easy to just swap engines and put a TT engine in the car instead of having to find parts and then go through the trouble of putting them all on?
I found this and am thinking about buying the engine if I can come up with the money for it. Lemme know your input guys

http://www.3si.org/forum/showthread.php?t=378933

of course I'd still have to buy the TT oil pan but other than that and the downpipe is there anything else I would need?

Edit:
Oh yea, and even though it's coming out of a 93 i shouldn't have any problems as far as the year difference right?

[hot3000]

C'mon guys, I need your input

[Linebckr49]

definitely need to do some searching.

when in doubt, check the FAQ. halfway down the 1st post there are some links pertaining to the TT conversion (http://www.automotiveforums.com/vbul...tt+conversion).

about swapping engines. your NA motor has a 10:1 compression ratio. the TT motors have a 8:1 compression ratio. so 10lbs of boost on a 10:1 will yeild more power than the same boost on a 8:1 motor. however, with a 10:1 motor, there is a fine line for tuning. get it wrong and you could easily blow up your motor. whereas with an 8:1 motor you have more leeway with your tune being on or off.

you should read up on tuning. here is a good page http://www.stealth316.com/2-safcii-adjust.htm. its long, but explained very well. basically, the highest compression a motor can have and run on pump gas is around 11.5:1. the honda S2000s have that CR (compression ratio). the 3S NA motor is 10:1, which is still very high. and the 3S TT motors have 8:1.

when you slap on a turbo to a high compression motor, you are forcing even more air into the cylinder when its already almost maxed out. so you'll need to carefully tune the car (using an air flow converter such as the Apexi SAFC or equivalent piggyback) so that you don't get an extremely LEAN condition and get knock or even blow the motor.

but the bottom line is this: you can do the TT conversion on your NA motor for about 1,000 if you're frugal and cut corners, but expect to spend around 1500 minimum to do it right (wideband O2, SAFC, TT ECU, EBC (electronic boost control)). if you drop in a TT motor, then you'll spend more, but tuning will be easier. tuning is actually pretty simple with a SAFC or equivalent if you understand things.

but you should understand the limitation of a FWD TT conversion.
1) traction--when you turbo any FWD car, or have a significant amount of horsepower in a FWD car, there will be traction issues. you won't be able to launch the car without slicks. you won't have traction in 1st or even maybe 2nd gear if you punch it hard. however, from a roll on the highway, you easily beat most V8s on the road b/c your drivetrain loss is minimal.

2) things break-- the FWD transmission was only made to sustain the power put down by the NA motor...around 220 crank hp. when you increase this power, the differential and then 2nd gear tend to be the first internal parts to break. so its a good idea to beef up your FWD tranny, or you can simply drop in an AWD tranny converted to run in FWD mode. the AWD tranny is much stronger and can easily withstand the abuse.

--

in addition, you should upgrade motor mounts. your stock rubber mounts, being 10+ years old, are probably already worn out or will go quickly with the increased hp. i recommend Maximal Performance's solid motor mounts, but you could also get some Polyurethane mounts.

a TT ECU is almost a MUST. people have tune with an NA ECU, but the TT ECU knows what boost is and can compensate accordingly. TT conversion + NA ECU = major headaches and less power.

a Wideband O2 sensor is a very good idea for tuning, however not completely necessary. the car can be tuned via the stock Narrow band O2 sensor. in order to monitor this, you need a Datalogger. see my post in the FAQ on page 2 for more info. since you have a 96 3S, datalogger compatibility is scarce, but i think Shiver's datalogger will work.

boost control is a must. you can get a simple manual boost controller (MBC) for $30 on ebay. ask stealthee, he knows which one and where to look. however an electronic boost controller is a good idea as it prevents boost spikes and other such things.

also, you'll need a boost gauge. and EGT (exhaust gas temperature) gauge is also a good idea as it allows you to somewhat watch your tune.

---

that's all i can recall for now off the top of my head. after you do some searching and reading, ask some more questions.

[hot3000]

great, thanks for the feedback.

[Zeiss]

^^^Good stuff, I am running 10:1 with my conversion and kinda wish I had went with 8:1. Im really limited by the compression. It still makes good power though no doubt about it.

[hot3000]

Well so far these are the things I've bought:

SAFC - $180.00
EGT Gauge- $90.00 (plus shipping)
Boost Gauge- $10.00 (plus shipping)
HDI EBC- $145.00 (plus shipping & ins)

1993 TT Engine - 4 bolt main
7,XXX miles after rebuild
- New Pistons & rings
- '99 Lifters
- New Rods
- Reground crank shaft
- New Rod Bearings
- 3SX Performance Light Weight Crank Pulley(not an underdrive, but 6lbs lighter than stock)
- All Gatorback belts
- New Timing belt
- Accel 8mm Wires
- New Spark Plugs
- 3SX Solid Motor mounts
- New Oil Pump
- New Water pump
- all gaskets replaced
- Starter & Alternator

$2500.00


I pick up the engine Saturday and the rest is on the way

[dhrubio]

DAMN this was pretty fast! lol good luck! what about installation?

[hot3000]

Originally Posted by dhrubio

DAMN this was pretty fast! lol good luck! what about installation?

Well I wont have to pay for that because my mom's boyfriend is going to help me with it. He used to have a body shop so he has all the tools and engine hoist at his house. Which is pretty sweet
I can't wait, Im soooo psyched!!

[youngvr4]

lol that WAS fast..good luck

and be carefull with that car when its all done and ready to run, fast cars can kill ya

[hot3000]

Thanks! and I will be careful

[dhrubio]

Originally Posted by hot3000

Well I wont have to pay for that because my mom's boyfriend is going to help me with it. He used to have a body shop so he has all the tools and engine hoist at his house. Which is pretty sweet
I can't wait, Im soooo psyched!!

How convenient! Good luck again and be careful.

-I wish I had the time and money to do this


--On a happier note, can you please sell me your speed sensor connector!?!?