Gamezilla

My twins are dying. Rebuilt and they lasted about 30k miles. They're slowely getting louder and louder. A high pitched whistle. I dont want to go the rebuild route as its just a waste of money for something that isnt going to last and I dont have $$$ to go single. At least not yet. As of right now Im stuck fixing other things on it and paying for other stuff, and I refuse to sell this car. If I can squeeze off another 6months worth of life out of them I should have enough $$$ to go single. If I cant, well, has anyone ever heard of having a shop fab up a piece of exhaust pipe from the stock manifold to the downpipe to essentialy delete the turbos? It'll suck...a LOT...but its not like I really boost anyways, so as long as I continue driving the way I normaly do I shouldnt really be effected too horribly. Right? I'll put on my flame suit now.

dubulup

go away or quit your bitchin

Gamezilla

I wonder how much a shop would charge to fab something like that up.

rotorbrain

no need for that. . . just get a stock NA exhaust manifold and have a pipe made up from that to your midpipe. i have one laying around if you wanna go that route.

paul

dubulup

what are you going to do with the oil feed line? loop it? can you run a high pressure line straight to the pan?

Gamezilla

I'll just loop the oil and coolant lines. That shouldnt be too difficult

Gamezilla

I dont wanna do this. Im really hoping those turbos make it those 6 months. I just need to have a plan for the unexpected.

FormulaRX

is your air/fuel ratio gonna be out of whack since you'll be getting way more fuel than the air that you are getting into the engine???

Gamezilla

As long as I dont give it more than 15% throttle I dont see it having too much of an impact. I bet if I floored it it'd fall on its face, but I dont even do that right now.

FormulaRX

I say just drive the twins to the ground...go easy on them for now until you can afford to replace them. How bad are they really? You don't think they can hold up for another few months? You should look into BNR twins or just go single since the stock twins aren't worth rebuilding anyway since tolerances aren't going to be up to what it should be even with balancing and all of that stuff, as you can already tell from it lasting you only 30K miles from the last rebuild.

Gamezilla

I intend to do just that - drive them into the ground. I'll probably go with what rotorbrain suggested and throw some NA headers on if they fail on me before i have the $$$ to go single. I really hope they hold up for another few months, but I cant tell. They still boost fine, although the last time I boosted was weeks ago and when I did it let out a huge cloud of grey smoke. There's oil in my inlet piping. And I can hear them squeel/whistle as they spool up/spool down. Im not a spirited driver like most 7 owners. I just wanted a car I could work on. But Ive been babying it around even more than normal just to cut the wear on the turbos down to an absolute minimum.

WildCard342

Hi,
Why not throw a rx7 series five hi flow turbo and manifold on now for about $500 or so and then you have 300++ hp and are half way to single town. Here in Australia its done sometimes when your low on cash. You can yet rebuilt hi flowed ones with a to4 exhaust that are pushing out 340hp for ever.

Dunno what its like over there but if your looking at making up pipework then your halfway there anyway, aren't you?

Hope this gives you another option.

Gordon

TwinTriangles

Why dont you just not drive it and save up ?
Is it your only transportation ?

rynberg

No. The ecu will just be using the vacuum fuel maps....

I've seen several sets of low mileage turbos for sale in the classifieds section for under $300. Sell your dying turbos for $100 as a core for someone and your out less than $200, plus several hours of your time if your doing it yourself.

trini

iTrader: (2)

i agree with this dude. if not ill sell you my single turbo kit 4 a g. lol 4 real cant beat dat.

FormulaRX

if you're boosting fine as you indicated, are you sure it's the turbos or is it something else that's wrong???

t-von

iTrader: (8)

You'll be surprised how powerful the engine is in NA mode. After I pulled my engine to replaced my clutch, I forgot to tighten the clamp that holds the ribbed IC pipe to my stock TB elbow. During a WOT run it blew off and the car was basically NA. I was surprised at how much power the engine still had.

Gamezilla

Its leaking oil into my intake piping and it smokes horribly after I boost it. Worse than a diesel truck. Im gonna make a guess its my turbos on their way out. That whistle sound Im hearing is probably shaft play. Either rebuilt poorly or unbalanced, Im sure its my turbos that are having issues.

And this is my daily driver. One of the shitty things about having an rx7 as a daily. This is exactly why I buy extras and sell off the cores afterwards (reason I have two transmissions and what Im hoping to have this time next year, two engines). As for those of you suggesting I buy a set of used twins - I cant see the point in investing $300 in something Im just using a temp solution to hold me over until I go single. I doubt those $300 twins would have much life left in them. I dunno. If it costs more to get an NA header and have a shop fab me up so cheap piece of exhaust pipe to connect ot my midpipe I'll just get used twins. If not I'll live without power for a couple months. It wont kill me.

saxyman990

I have a set of stock twins sitting in my garage. They have about 55k miles, boosted perfectly before I took them off, absolutely no smoking, very minimal shaft play. These will last a hell of a lot longer than 6-months. If you're interested, PM me with an offer.

-Rob

dubulup

loop high pressure to a drain line???????????????????????????

has anyone ever done this? I've never heard of this...doesn't mean it can't be done though...I don't know much.

PhoenixDownVII

I have an idea, sell your FD to someone that will fix it instead of doing a temporary fix or hack job and lower the HP to below Stock levels (SO COOL!)

Just my suggestion....poor FD

RotaryResurrection

iTrader: (8)

IF you didnt want to have to buy any new hardware, you could just remove your turbos, take the center sections/compressor half off of the turbine housings, and fab up 2 thick plates to bolt in place of the center sections. Then bolt your turbine housings and downpipe back together like stock, the plates keep the exhaust from coming out, and you didnt have to change your exhaust configuration.

You'd need to cap off your coolant lines and plug the block oil feed passage behind the PS pump, as well as block off the turbo oil drain holes which wouldnt be hard.

Then you have to reroute your intake, removing intercooler and other such restrictions that no longer serve any purpose.

OR you can go the other way and refab your exhaust with NA manifold, and the above mods are still necessary.

I'll go ahead and tell you that you WILL run quite rich all the time, even though you're still using vacuum maps only. Even when not into boost, the turbos move more air than the engine would suck in on it's own, and therefore doing this will throw things off...the car will not drive well, and I dont think you'll be happy with it's smoothness or power (you'll almost get run over).