TD42 boost and fuel settings

Submitted: Wednesday, Jul 23, 2003 at 20:12
ThreadID: 6134 Views:3464 Replies:4 FollowUps:3
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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!!
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Reply By: Truckster (Vic) - Wednesday, Jul 23, 2003 at 22:46

Wednesday, Jul 23, 2003 at 22:46
Im running 11psi Boost, and think it was 560 degrees. Wouldnt want to go much over that

www.are.com.au for LOTS of turbo info..
AnswerID: 25738

Reply By: Mick - Thursday, Jul 24, 2003 at 08:45

Thursday, Jul 24, 2003 at 08:45
The dynamic kit we run on our trucks were hi flowed, and turbine wheels were cropped to give a quicker pick up. Dynamics settings from factory were 13psi, West end did the pump up and installed an aneroid to control the fuel air ratio.
Yes our trucks haull arse!
AnswerID: 25754

Reply By: crfan - Thursday, Jul 24, 2003 at 10:53

Thursday, Jul 24, 2003 at 10:53
How much was the pyro gauge and were did you get it brand etc can not seem to find one under $200.00
AnswerID: 25764

Follow Up By: muzza - Thursday, Jul 24, 2003 at 18:45

Thursday, Jul 24, 2003 at 18:45
crfan, I went with VDO gauges and the pyro's aren't cheap. Mine was about $250 from Airco instruments www.airco.com.au (I think)
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FollowupID: 17533

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.
AnswerID: 25765

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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FollowupID: 17618

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