i found some good used turbos for 150 bucks with about 90k miles on them, and i also found some rebuilt ones on ebay for about 450 bucks...

how long do the stock turbos usually last? i was thinking 90k is stretching it, but for 150 bucks i might just do it.

 

I think you should go with the rebuilt one, 90k miles on the used ones won't last long.

 

how long do the stock turbos usually last?

 

rebuilt i would go for

 

dont waste your money or time on 90K used turbos ...... turbos can last anywhere from 40 000 miles to 120 000 miles

 

damn, i dunno if i can shell out 450 bucks

 

Rebuild your stock ones, what is it, like $120 for each turbo?

 

dont really have time to send the turbos off to have rebuilt...

i suppose i could always buy these decent used ones and have my blown ones rebuilt...

 

neither. I have seen as many fucked up rebuild attempts as I have worn out stockers. mileage is not always the determining factor. 75% of the twins on the market today will burn oil/smoke in one way or another. Many people, including myself, go single not because of the desire for more power than the twins can make (350rwhp) but because it is damn near impossible to get a reliable set for a reasonable amount of money when compared to what clean used singles sell for. Not to mention the simplification a single involves.

 

maybe I need to get into rebuilding turbos. I have yet to have a set rebuilt that worked right for more than 3 months afterwards, personally.

 

RotaryResurrection is right, neither. It's not hard to find a lower mileage set than that. And rebuilds never last.

 

I've bought a used set for $300. It's doing fine. Next time it goes out, I'm planning to go for BNR stage 2 or 3...

 

My twins currently have 100k on them and they are performing flawlessly.

If I were you, I would probably jump on these. Not much manifold cracking and they appear to be low mileage.

http://cgi.ebay.com/ebaymotors/1994-...14993378QQrdZ1

 

I agree. Mileage doesn't have a lot to do with it. I took my turbos out of my 90k mile Auto FD and put them in my current car. Manifold was flawless. Looked new. Just needed the oil seals replaced. It's been nearly 2 years and they are still running strong at 12+ PSI.

Make sure you get a good look at the manifold. If it looks okay, turbos are PROBABLY okay.

 

Well if the lack of manifolds is something you can figure a way around, I'd be giving you a call. The only quality stock solution (rebuilt or new) is $3k. I saw those $450 "rebuilt" turbos and there is something fishy there.

Dave

 

Haven't had to deal with the issue on my car....yet. But a friend and forum member went through about three different sets of "rebuilt" before he got one that didn't smoke and/or leak. IIRC, at least two of them were done by a specialty shop that presumably knew what they were doing. It was a frustrating and costly process that took him a good part of the summer.
When the time comes I'll probably go new or BNR III.

 

for reference, I got some used ones with less than 20k on them for $100. Keep searching there will be better deals poppin up.

 

it's always a gamble even with reputable turbo rebuilders, it generally depends on whether the turbo feels like cooperating or not, not nearly the same as rebuilding an engine.

thing that gets me is people who are running well over 100 PSI of oil pressure and blaming the turbo builders.

 

Even when running a -3an feed and -12an drain you would still stand by that statement? What about when you put in a 50 thousandths restrictor and STILL get smoke or leakage?

I once had 9 bad turbos rebuilt in a row by a "reputable" shop. Compressor nuts came off when running, the leaked oil from the chra/turbine housing seam, smoked out the tailpipe, and performed poorly. I was told that the blowoff valves and oil pressure on all those cars were the problem.

 

I thought there was a releif valve for Oil pressure? Besides, before fully warm I'll see over 100 psi at 3.5k or so. Especially on fresh oil. But then again that's my stock gauge, so I'm not sure how accurate that is.

 

What are you cost figures?

I see RX7Store sells 99 spec turbos (new) for $2700. And single kits for $2350. Not much of a difference. Are the 99 specs not a good alternative?

 

It all depends on how good the housings are. Even a fresh rebuilt set of turbos will quickly start smoking again if the housings are cracked badly enough (and all used housing show some degree of cracking) because the gaskets will get blown out.

 

I think I am in the VAST minority, but I rebuilt my turbos around 30k miles ago using turbo city rebuild kits and don't have any noticable smoking, oil burning etc. I think I'm living on borrowed time as these turbos now have around 160k total miles, but as long as they keep boosting 14psi, I'll keep on keepin on.

 

just curious, what seems fishy about them? they look pretty good overall to me.. but i dont know :o

 

I doubt your in the vast minority there. Ive ran several rebuilt turbos, garret's IHI's and mitsubishi's on previous cars. Doing the rebuilds myself and never having any issues afterwards. Im not sure how different (if any) the twins on our cars are, but if i can find rebuild kits for them i fully expect to rebuild mine this winter and also dont forsee any problems.