legacycentral bbs

First off, many thanks to all those of the BBS that have helped me in my build thus far. Both in support of answers and suggestions and for all the cool parts that have resulted from board members.

That said, I now have the brakes, suspension, and drivetrain systems (Matt I still love you and your team, my 5mt is awesome ) completed (save for a few random items). I'm now ready to begin moving into the motor stage of the build. I am looking for 300-310 chp and equivalent torque. This should put me a place where my drivetrain will handle it for 10's of thousands of miles and be econimically feasible as I am not required to get into the shortblock to change pistons and rods. The power needs to be applicable on the street and during Auto-X. That is one reason why I am doing many things to reduce spool RPM.

So, I wanted to lay out my plans thus far, ask a few questions, and gather some input. I am still a fair ways out on all of this and admittably have a bit of searching to do. So I want to preface my questions with the understanding I'm not looking for hightly in depth answers - though if you want to do so, feel free .

Engine modifications
- 3" TBE, bellmouth downpipe
- MBC at about 11-12psi
- Meth/water injection
--- just a simple single stage setup
- Turbo heat wrap
- Grp N mounts

Drivetrain modifications
- 5mt
- short ratio STi gearset 1-4, final 3.90 ratio
- Modena front LSD
- lightweight fly, 12lb
- Grp N mounts
- Clutch is stock Excedy unit, rumored to be good to around 310 ft-lb at the crank. This will be a firm limit to my power generation as I will not be changing this clutch anytime soon.


So, here's the current list of items I'm looking at doing.

- TD05H turbo @ 16-18 psi
--- ceramic coated? I do have a very nice heat blanket already
- Ceramic coated headers and up-pipe
- 550 cc/min injectors
- Walbro fuel pump
- Management of some sort, Revtronics, SAFC, PP6?
--- I have no desire to wire in a standalone, zero desire
- Upgrade the meth inject kit (I still intend to use this system for cooling and raising the octane levels, not for strict fueling requirements)
--- pressure gauge
--- flow gauge
--- fault out system incase of failure
------ this will work really well with the Revtronics system that has two modes
- Add additional system sensors
--- Zeitronics wideband, I reall like the logging capabilities
--- Additional knock sensor
--- EGT, and could tie into the the Zeitronics
--- Oil pressure
- Heat wrapping on all the coolant lines running through the engine bay. I am wanting to keep my underhood and intake temps as low as possible.
- True CAI routed down into the fender well.
--- may require removal of ABS, but I don't use it anyways
- Delta cams, street grind
- Port and polish of the 22T heads?
--- I want to keep 22T heads for many reasons. This is not really a very negotiable items.
- Phenolic spacers for the intake manifold
- MSD ignition?
--- A stronger spark would be nice.
--- 2-step capability could be really fun


I want to have a engine that is going to be very reliable and very safe. I do drive the car in many different conditions and many are very incondusive to having a motor let go and leave me stranded. I also want the car to be in a configuration that will last me a long time. I'm hoping my build represents these idologies.

So, my questions -

- Where is the best place to put my EGT. I'm looking at only have a single gauge, though I guess I could do two. It's a monetary issue...
- Where is the best place to place my oil pressure gauge?
- Where is the best place to put the Wideband?
--- Currently I'm thinking in the stock O2 location and move the stock sensor down where my WRX DP has a plug.
- How inefficient is the TD05H in terms of heat generation?
--- I know many people run FMIC and TMIC but with a large compressor wheel I would think it is more efficient than the VF11 and would be able to push more pressure with a lower raise in air temp. I'm asking to try and figure out how critical my water/meth injection system will be.
- Is an aluminum radiator going to be worth the cost and should I add this into my list?
--- If so, did the Koyo problems ever get worked out?

Are there any other suggestions or comments? I am still several months out before I really begin my build so I've got plenty of time to do more searching and more planning. But I wanted to verify that I am on the right path and see if there was anything significant I've been missing.

As always, many thanks in advance.

Considered a awic? They're more efficient for removing heat and maintain a smaller volume than a large tmic or a fmic. Downside is that the system is more involved.
If you're planning an engine management system that can control ignition advance, then there is no reason not to include thinner headgaskets to increase the compression that small amount.

Currently I will not be using either a FMIC, TMIC, or AWIC.

My meth/water injection system will address all of my cooling needs.

I had thought about head gaskets because I'm not sure if the OEM ones I put in a couple years ago will hold the power or if I will need to upgrade to something like the Cometics. But I'd rather not do HG's unless I have to, i.e. I decide to port the heads.

But I hadn't thought about a thinner gasket to increase the compression. Good thought.

Any other thoughts out there?

I think you'd have an easier time reaching your hp goal porting and polishing the heads anyway. It'll make the turbo work less hard and probably increase its life.
I also think you'd have a easier time w/ a standalone. But everyone needs a challenge, right?

Too bad on the standalone, as you would be able to take full advantage of your setup. It's honestly not as hard as everyone thinks it is.



I like wrapping stuff because it is cheap and effective. A bit of a fire hazard, but effective. A high end coating like Jet Hot or something like that is what I'd rather do, but one has to choose his battles.

I appreciate the comment guys. And Dan I appreciate the comment about the heat wrapping.

However, I don't want this thread to get hung up on the pro's and con's of going to a standalone system. Right now it's not seriously being considered for many, many reasons, one of which is cost.

However, there are still a lot of questions/concerns I've asked/raised that have yet to be addressed. Anyone want to take a crack at them? Namely the efficiency of the TD05 and the need for the aluminum radiator if I eliminate the additional heat loss that occurs through all the rubber plumbing lines.

There's a few other threads on the ability of the 22T heads so I'll watch those threads for the answers I'm after.

And finally, is my current plan, EM aside, capable of reliable 300chp?

Thanks in advance.

I vote yes.
However, as familiar as I'm not with meth injection, I stand by my opinion that you need some kind of intercooler to maintain reliability.