how much will this give me?

[onephatcracka]

I stumbled on this site and was wondering how much more power would this give me and is it worth it to turbo-charge a 5mge engine in a 85 supra?

http://www.socalsupras.com/members/J...rboArticle.htm

or would it be more worth it to buy the 7mgte engine price vs performance?

i don't have a whole lot of money seeing as i am working on my project 79 280zx

[bgrieger]

This is the classic method to turbocharge the 5m. Far simpler than swapping a 7m, far cheaper, though it has tight limits on boost pressure and fuel requirements. Higher base compression means you will be running around the MK III factory boost as your "peak" (may be able to squeeze a few extra PSI out), and don't even think about running less than premium fuel if you want to be safe. On the upside, you get the performance of a high compression engine until boost hits and some extra kick when the turbo comes into play.

Custom pistons are available for a price to allow you to up the boost should you want to go that route in the future. The HKS turbo kits of the era only ran 4-6 lbs, and the stock is 6.5 for the MK III wastegate. You should also consider a fuel computer such as an SAFC (can't remember whether Jakes article touches on that) to fine tune and ensure the fuel is there. Dyno testing with a wideband is also recommended.

For raw power, the 3L of course is the better choice, but I believe the 5M upgrade would still be more than fun enough for the street!

Bob

[onephatcracka]

thanks for the info.. I wonder if i decided to do this... how much would it cost in the end? And how many pony's is that gonna dish out? Where can i get this stuff? HA i just have sooo many questions, because i am realy interested in going this way.

[bgrieger]

Cost - probably $1500-2000 or so to do remotely correctly. You MIGHT be able to do it on a grand, but you're pushing it (oil lines alone are upwards of $350). Output, perhaps 200-250 to the wheels.

Best place for the swap and project information is at celicasupra.com. A dedicated MKII community.

[onephatcracka]

niiiice.. thanks man

[Piddy]

Take a look at Rabid Chimp. They have a turbo kit for the MKII.


One rebuilt, factory spec CT26 Toyota turbo
OEM, ceramic coated, Toyota CT26 turbo elbow (02 sensor housing)
One turbo to manifold gasket
One high-heat (2000 degrees F) ceramic coated cast iron turbo manifold with 17mm manifold bolts
One exhaust manifold gasket
One Rabid Chimp turbo oil line kit with aluminum flanges, brass fittings, and stainless steel braided (teflon inner) lines
One set of turbo coolant lines, with necessary clamps, plastic Ts and brass hose barbs
One Rabid Chimp 3” mandrel bent, aluminized turbo downpipe, with copper gasket, and 3/8" thick flange
One re-usable open element air filter, with stainless steel clamp
One turbo inlet hose (mates turbo to air flow meter), complete with blow off valve recirculation and air valve ports, and stainless steel clamps (bottom of inlet hose has a fitting for power steering vacuum line relocation
One Cartech rising rate fuel pressure regulator, with high pressure fuel injection lines, vacuum lines, and hose clamps
One Rabid Chimp 24”x12”x3” intercooler (bar and plate design, Garrett core)
One set of Rabid Chimp 2.5” mandrel bent, powder coated intercooler pipes, with silicone hose couplings, and stainless steel hose clamps. Piping has a Greddy blow off valve flange, and goes all the way to the throttle body
One Greddy Type S blow off valve
One Split Second air/fuel mixture gauge
One Autometer Phantom vacuum/boost gauge (30psi)
One Walbro 255lph high volume fuel pump
One universal heated 02 sensor, with flange

Here is the DIRECT LINK. Have fun. I was debating doing that myself... 65000 miles just seems too low to screw with the engine.

[onephatcracka]

they are soooo freakin expensive though

[onephatcracka]

which parts can i probably get by used?... and where can i get them?.... i'll get the important parts probably from rabidchimp

[Piddy]

Ya... I wouldn't buy it from them. But there are you parts! You could probably get your CT26 Refurbished for pretty cheap.

[onephatcracka]

would an mkIII kit for a 7mge work?

[bgrieger]

Problem is the piping and oil. Turbo and manifold are 7M parts, and you could find used (hell, once the twin turbo project gets heavily under way, I have a pair of them for my MK II project plans).

To do it cheaper:

Used manifold - you don't need to extrude hone, though it is a nice touch.

Turbo - could be a known good used unit, but be prepared that it may have to come out to rebuilt later.

Oil lines - custom, as you found on Jake's site. The oil pan needs a bung put in to facilitate the oil return.

Water cooling - a nice bonus you should look to try to get in there, but not absolutely needed. Get a turbo timer and use it wisely.

Downpipe is required, and the Rabid chimp is a decent price, unless you know someone that can do it for a case of beer plus materials.

Intercooler can again be a used MKIII unit, though the piping is all custom. You could get the rabid chimp, get some cheapies made up where you are, or take odds and ends of straight pipe and use MKIII elbows to fit it in there. BOV is extra, but a 7M unit would do fine for stock boost.

FPR is required, as is the fuel pump and I would not try it without a fuel computer. O2 sensor could be a MKIII, but they are expensive. GM has some 3 wire heated units that work for a lot less. Additional injector control is almost a must if you want more boost.

Put it all together, and you see why the rabidchimp is pretty pricey. No worse though than a turbo kit for any other car, and there appears to be more included with theirs. If I didn't have most of the parts on shelves here, I'd likely hit it.


Bob

[SLY Mantis]

yo craka
It's mantis again, but ive decided to let our old argument die, and help you out, since im not petty.
As i mentioned before, im collecting parts to turbo my 5mge, and i have spent alot of time researching this. So ill share some information with you on the subject:

Turbo: the ct26 turbo and manifold from the 7mgte will fit our engine. THe only thing that needs to be modified is the monifold, where a little piece has to be ground off to fit the power steering pump.

Intercooler: again the mk3 intercooler will fit (and infact the mk2 already has holes to mount it), and if you can get the intercooler piping from a mk3, they will work as well (with a little "convincing")

Fuel: This is one of the biggest worries of any turbo project. The best way to handle this is obviously a standalone unit, but the cost would warrent just doing the 7mgte swap.
The next option is getting a piggyback (the S-AFC II is the popular choice) and getting 295cc injectors from a 7mge (na mk3 supra), as well as a 255lph fuel pump, and maybe a rrfpr.
The cheapest option (the way im going) is to get a rising rate fuel pressure regulator, the cartech/begi adjustable unit is definitly the way to go, and a 255lph fuel pump. And if you want you can upgrade teh injectors to those from a 4age from a 85-87 corolla gts or 85-89 mr2 (our injectors are 182cc, the 4age is 210cc)
This last method will only be good up to 9psi, so if you want really
high hp, you'll have to go the other route.

Downpipe - a mk3 unit will fit but hangs very low and can possibly be damage. Better to go custom made or get a rabidchimp unit.

oil lines - im making my own, but the rabid chimp units are really good and worth it. Im just on a tight budject, and i think i can make the lines for about $50-60 bucks. but it's gonna be alot of work.

Clutch - your stock clutch wont hold, get an aftermarket one. Like ACT 6 puck

Other than that there are two things you have to worry about. The head gasket is the weakest part of the engine. SO replace it with either a Metal headgasket or normal headgasket for the 7mgte. If you want really high boost (over 8 psi you will need it), and the pistons are the second weakest part of the engine (you will need to replace these if your going high boost as well).

If you run the engine on stock boost (6.5psi) you will get about 210hp at the wheels.
Remeber the two main things to watch out for in this is knock, and the air fuel ratio. if one is bad your gonna toast your engine.

Good luck on this. It is a good low cost set up, and gains good hp for the money. It'll cost anywhere from $1-2000 depending on how good deals you get.

Good luck with it, and lets put the past behind us.

[onephatcracka]

ha thanks man.... to be honest i forgot about it and didn't see it as a big deal....but any way i value your opinion and if things come up and you need some advice or ideas let me know. I would be glad to help. I feel the same way if I need some advice i'll give you a holla.

[onephatcracka]

oh yea.... i am already putting a new clutch in and all new seals since i bought the felpro engine seal kit.... ( i have oil leaks ) so i was going to have that done anyways. I'm going to do some research see how much i can put this in myself for. If anyone has free time they can do it for me ha j/k

[eMcEeNeSs]

I "heard" 1986 supra turbo bolts in. If it does you can go to the junkyard and pay $200+ or just stick everything in your pants.