TD05H or Big compressor VF7?

[4WDFrenzy]

Okay, so the title is my question. I recently acquired a TD05H from a GC8 body STi. I am wondering if it will be too much turbo for the little EA82T to handle or should I try out the big compressor kit that I saw on fleaBay the other day? It claims to be for the IHI VF7 and comes with the compressor wheel and ported compressor housing. I realize that the EA82T isn't the strongest motor(i.e. paper thin cylinder walls, semi weak headgaskets, etc.). Either way, I want to install a bigger turbo in my GL-10. What do you guys think? Which would you choose?

 

Patrick

[beataru]

I would choose the TD04L because back when my car ran perfect, Russ said "it spools just as fast as the stock turbo" and if thats true then It pulls way harder than the stock. that was back when it was running well, EA-82s dont push too much exhaust gas, and the turbos header design is TERRIBLE to say the least. I bet that if you built a custom header, ran the LH pipe into a 2way collector where it joins with the RH and it was fairly smooth, it could push that TD05 it might be slow in first but I think lag is fun in FAST cars.

[4WDFrenzy]

I plan on getting a custom header made when I get back to the States(only about a year and a half to go:banana: ). I like the stock turbo because it seems to spool relatively fast, but it just doesn't move a good amount of air without producing lots of heat. I have my stock VF7 overboosted to 11psi, and Thank GOD I was able to install a huge intercooler(mistubishi starion) on it. But now I'm in the hunt for more power and happened to get my hands on this TD05. So that is what sparked my interest.

[beataru]

ehhh, More power??? I am planning on pushing my car up to around 15psi, but After that I am going to start thinking about either an EJswap or just finding a set of forged pistons for my car, if I can get forged pistons then I might push it to 18-22 Psi Depending on how much I love my engine I bet that if you remade your spider intake on your car to have nice smooth bends and get Nice runners made for it, you could easily boost the power up by like 10hp, not to menchin some more torque, and it would be easier for the boost you shove to get in there too! our EA-82 spiderintakes stink, but What can you expect for a 20yearold car!

[joostvdw]

ehhh, More power??? I am planning on pushing my car up to around 15psi, but After that I am going to start thinking about either an EJswap or just finding a set of forged pistons for my car, if I can get forged pistons then I might push it to 18-22 Psi Depending on how much I love my engine I bet that if you remade your spider intake on your car to have nice smooth bends and get Nice runners made for it, you could easily boost the power up by like 10hp, not to menchin some more torque, and it would be easier for the boost you shove to get in there too! our EA-82 spiderintakes stink, but What can you expect for a 20yearold car!

 

pistons aren't the foremost weak link, I would spend the cash on O-ringed heads and/or treat them (cryo or ceramic) this should keep the HG in 1 piece and will allow you to safely boost higher

 

also injection system MUST be adressed, stock injectors are not big enough, even with the pressure upped.

[subyrally]

i was thinking about a td05 for when i build my ea82t, but thats a long way down the road. as long as you keep the boost down a bit, that turbo should be fine, even at lower boost, you should make more power due to the larger flow rates. also make sure that you keep your fuel system up to par with what ever turboyou run.

[Turbone]

If you learn nothing from history, you are doomed to repeat it:rolleyes:

 

Instead of dropping all that money into a EA82T, why not do a transplant?

SuberDave has succesfully done newer gen transplants and has it all documented. When are you guys going to learn to leave a crappy/unmodifiable engine alone?

[crazy D]

If you learn nothing from history, you are doomed to repeat it:rolleyes:

 

Instead of dropping all that money into a EA81T, why not do a transplant?

SuberDave has succesfully done newer gen transplants and has it all documented. When are you guys going to learn to leave a crappy/unmodifiable engine alone?

 

im with ya there rob

 

SUBERDAVE FTW!!!!!!!!!

 

i have personally experienced the power of his Ej20G GL-10 and it is by far the fastest car i've been in...just wait till you see what he has next:eek:

 

 

the subaru kid

-Dalton

[86BRATMAN]

If you learn nothing from history, you are doomed to repeat it:rolleyes:

 

Instead of dropping all that money into a EA81T, why not do a transplant?

SuberDave has succesfully done newer gen transplants and has it all documented. When are you guys going to learn to leave a crappy/unmodifiable engine alone?

 

 

Spoken like a prophet...

[calebz]

If you learn nothing from history, you are doomed to repeat it:rolleyes:

 

Instead of dropping all that money into a EA81T, why not do a transplant?

SuberDave has succesfully done newer gen transplants and has it all documented. When are you guys going to learn to leave a crappy/unmodifiable engine alone?

 

 

I have less $$ in my whole car (plus all the parts, spare motors et al) than the swap costs. Thats reason number one.

 

You are correct in saying the EA81T is unmodifiable, thankfully, the EA82T is not.

 

 

For the record, I have blown up nearly every part of an EA82T except the head gaskets.

 

 

Patrick - IMO, a TD05 is just too much - you wouldn't be able to effectively utilize its potential, and I think you would be unhappy with the lag.

 

My suggestion would be to go for a Deadbolt TD04 - Good spool, good flow

[beataru]

If you learn nothing from history, you are doomed to repeat it:rolleyes:

 

Instead of dropping all that money into a EA81T, why not do a transplant?

SuberDave has succesfully done newer gen transplants and has it all documented. When are you guys going to learn to leave a crappy/unmodifiable engine alone?

Because some of us dont feel like swapping an engine unless we absolutly have to, and because we all want to have a blown engine underneath our belt :cool:

 

 

Also Pistons and rods are the weak link if detonation occurs, which it always does in a turbocharged engine, so.. But I agree that the headgaskets on our series engine arnt the best of holders

[subyrally]

i think ill only stop trying to play with the ea82t when people stop saying that it cant be done, kinda one of those doing it out of spite things for me, that and i dont like people telling me that i cant do something. i feel that there is potential for something good with those engines, but i know its not going to be cheap or easy, but thats the fun of it, doing something that hasnt been done or that isnt very common.

[beataru]

thats right, I like being original like my bro in laws RS, his heads are compleatly original, made up by him.

[cobcob]

As to the head gasket question... maybe give these guys a call... according to their .PDF archive that I downloaded they've done some head gaskets for an EA82 in the past!

http://www.headgasket.com/index.html

[calebz]

Quite honestly, my experience has led me to believe that the gaskets are not the problem.

 

Having head bolts threading into 20 year old aluminum seems to be the problem IMO

[joostvdw]

Quite honestly, my experience has led me to believe that the gaskets are not the problem.

 

Having head bolts threading into 20 year old aluminum seems to be the problem IMO

 

if you honestly believe that's the problem, maybe someone should try helicoils? that way you could also use some premanufactured ARP studs (instead of the $900 customs WJM was talking about)

 

I know that motorcycle guys do this all the time, using helicoils instead of threaded aluminium because that's way stronger.

[subyrally]

if you honestly believe that's the problem, maybe someone should try helicoils? that way you could also use some premanufactured ARP studs (instead of the $900 customs WJM was talking about)

 

I know that motorcycle guys do this all the time, using helicoils instead of threaded aluminium because that's way stronger.

 

that sounds like an idea, i can talk to my machinist about that and see if that would be worthwhile.

[calebz]

if you honestly believe that's the problem, maybe someone should try helicoils? that way you could also use some premanufactured ARP studs (instead of the $900 customs WJM was talking about)

 

I know that motorcycle guys do this all the time, using helicoils instead of threaded aluminium because that's way stronger.

 

 

 

I have been using Timeserts. Carbon steel inserts. Never blown a head gasket. Even at 13+psi. Have a few overheats under my belt as well.

[joostvdw]

that sounds like an idea, i can talk to my machinist about that and see if that would be worthwhile.

if the bolts are really the weak spot (or actually the thread inside the block halves) helicoils will definately fix that, strange I never thought of it before...:-\

 

added benefit is that you can pick the diameter and pitch of your choice.

[subyrally]

if the bolts are really the weak spot (or actually the thread inside the block halves) helicoils will definately fix that, strange I never thought of it before...:-\

 

added benefit is that you can pick the diameter and pitch of your choice.

 

my thoughts exactly, might make it a lot easier to get studs...

[daeron]

the head bolt thing is NOT an insurmountable obstacle, nobody here tries to pass it off as such. You could also simply drill the holes out and tap them for a slightly larger american sized stud, and get cheap head studs that way.. couldnt you?

 

In the end, if you can turbocharge a vehicle you can figure things like this out.

[calebz]

if the bolts are really the weak spot (or actually the thread inside the block halves) helicoils will definately fix that, strange I never thought of it before...:-\

 

added benefit is that you can pick the diameter and pitch of your choice.

 

 

Diameter and pitch weren't the problem when I talked to the guys at ARP. It was the different lengths that got their panties all in a twist!

 

Thus far, the inserts I have used have held. I was able to get the correct size to retain the stock head bolts.

 

The tools (Drill bit and a couple of taps) were the most expensive part, but now that I have them, I can do an EA82T for about $40. With prep time, it takes a couple of hours to do it cleanly, by hand. Would be a little faster with a drill press. Less likely to make a mistake that way as well.

[joostvdw]

I know I've read it somewhere, but can someone explain to me quick and dirty why studs are "better" than bolts?

 

and the length difference, is there 1 bolt longer then the rest? or shorter? if it's shorter you can just cut it down yourself

[daeron]

I know I've read it somewhere, but can someone explain to me quick and dirty why studs are "better" than bolts?

 

and the length difference, is there 1 bolt longer then the rest? or shorter? if it's shorter you can just cut it down yourself

IIRC, several reasons on top of each other, a few of which:

 

-studs, thread them in, torque them once, never take them out again; torquing heads is always a stress and a wear on the steel stud and not the aluminum.

 

-stud become an integral part of the block, and change the way the stress is transferred into the aluminum. more stress is put up where the nut fastens to, and much much less on the aluminum of the block deck; this keeps the mating surface truer, longer, better.

 

-simple maintenance questions, a damaged stud is a piece of cake to fix, a damaged head bolt usually has damanged block threads accompanying it.

 

I am sure I have left out some more technical, "why it RUNS better" points that I do know, and that I am ignorant of, but they are largely "strawpile" in nature. Every little bit helps, though.

[Turbone]

I have less $$ in my whole car (plus all the parts, spare motors et al) than the swap costs. Thats reason number one.

 

You are correct in saying the EA81T is unmodifiable, thankfully, the EA82T is not.

 

 

For the record, I have blown up nearly every part of an EA82T except the head gaskets.

 

 

Patrick - IMO, a TD05 is just too much - you wouldn't be able to effectively utilize its potential, and I think you would be unhappy with the lag.

 

My suggestion would be to go for a Deadbolt TD04 - Good spool, good flow

 

Ok, my bad...typo. You know that should have read EA82T. What you did was at the cheapest end of the spectrum. You didnt put forged pistons, larger injectors, etc into your project. And you drove it like you stole it:-p

AND, If I remember correctly, it was a SPFI block, right?

 

What I'm trying to say (again), instead of throwing all that money into a poorly designed engine, for around the same price (dont quote me on that) you could swap in a engine that would increase your HP and reliability ten fold. And that would still be stock!