TD42 boost and fuel settings
Submitted: Wednesday, Jul 23, 2003 at 20:12
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muzza
I've recently fitted a boost gauge and pyro gauge to my safari turbo'd GQ (50,000kms). Boost was 7 psi (no intercooler) and exhaust looked like a petrol ie never any black smoke. I've now turned the boost up to 8 psi and adjusted the pump to give me about 500 centigrade after full throttle for a couple of minutes. Question is, when does this become a problem as far as melted pistons are concerned? A mate has just fully rebuilt his 1HZ cruiser engine (safari turbo, non intercooled) after he played with the boost and fuel!!
Reply By: Steve from Drive Systems Victoria - Thursday, Jul 24, 2003 at 10:57
Thursday, Jul 24, 2003 at 10:57
Boost is largely unimportant, as so many other engine variables will effect air delivery. Boost is also a bi-product, or rather is directly effected by fuel settings, viz if the engine isn't getting fuel, it won't make boost etc.
Things start getting touchy at about 600 F, you won't want to be running in this range under high load for too long.
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Follow Up By: Wazza (Vic) - Friday, Jul 25, 2003 at 11:20
Friday, Jul 25, 2003 at 11:20
Steve, don't you mean 600°C ?? My 80 runs up to 600°F between traffic lights and 900-1000°F uphills say 100km/h 4th/5th gear. Cruising at 100km/h on the flat is around 450-500°F. Temps are post turbo.
Correct me if I am wrong.Cheers,
Wazza
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Follow Up By: Steve from Drive Systems Victoria - Friday, Jul 25, 2003 at 21:24
Friday, Jul 25, 2003 at 21:24
Correct, my error.
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