Quote:
Originally Posted by 88tlc
thanks dougal for your data point. how are you getting 20psi of boost? are you seriously running the engine at 750 deg C? that is like 1550 deg F? would you recommend running that high on a stock engine?
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I'm using a smaller turbo than stock, mine is a wastegated T25 with a 0.49 A/R exhaust housing. The stock turbo is a TB25 which has exactly the same compressor but a bigger exhaust housing and no wastegate.
I have been running those temps for the last 8000km and see no damage. I've had the occasional excursion past too. Most people put excessive safety factors on their EGT levels.
Quote:
Originally Posted by 88tlc
was looking at the 4bd1t turbo, and the 4bd2t with wastegate turbo.
some images attached from some for sale on ebay, the flange and fittings look to be the same. can anyone confirm this?
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Hey that's new, I have never seen that turbo before. The 4BD2's I've seen had no wastegate. Yes it's the same flange and core.
You'll be able to push close to 20psi with the stock turbo, but only at higher rpm. Probably suffering smoke and high EGT's below that or poor response if you have the boost compensator set to deal with the smoke and EGT's. This is why I went smaller, I have 20psi boost from ludicrously low revs.
Yes an intercooler is a good idea, I haven't yet fitted one. Partly due to space, mostly due to sloth.