Turbo GQ 4.2 Boost

Submitted: Sunday, Jul 18, 2004 at 21:08
ThreadID: 14776 Views:2385 Replies:3 FollowUps:1
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We've just had the son's GQ TD42 turboed.
(Also a larger exhaust)
To say I'm impressed is an understatement, the bloody thing goes like a V8 now, but I'm wondering what boost pressure most others are using. My son's has 12" boost and I'm wondering is that too much???? or is that pretty normal. Truckster, if you are listening how much boost do you have on yours?
Like I say, the bloody thing goes outstandingly well, but will he have probs when the weather heats up, or long term??
Any info appreciated.
Cheers and thanks for your time.
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Reply By: Truckster (Vic) - Sunday, Jul 18, 2004 at 21:18

Sunday, Jul 18, 2004 at 21:18
Im runnin 10psi @ 3000
Bazzle running 13psi @ 3000
Mark ex ARB man 20psi @ 3000 80,000klms on the clock last time I spoke to him 12+ mths ago, and its still going.

12psi should be sweet.
AnswerID: 68328

Reply By: Member - Chris M (QLD) - Monday, Jul 19, 2004 at 10:44

Monday, Jul 19, 2004 at 10:44

I think I spoke with you over email a while ago???

It'll be all good, batteries won't last as long on turbo side, as you generate enough heat to cook a fish like Steve Irwin on his intercooler, but apart from that, the GQ motor is tough as you can get and there are comp trucks running 16-18psi out there @ 4000rpms all day without issues.

Your son will have one big problem. His fuel bill. If you are the guy I spoke to, you had it fitted at Brisbane Tuning by John Whittaker. On a bad tank when I've played with the loud pedal the whole time may go down to 7.5k's the litre, not bad though because that's still 600k's to a tank.

Just have fun mate. What increase did your son get at the wheels HP and KW???
AnswerID: 68405

Reply By: Flash - Wednesday, Jul 21, 2004 at 21:23

Wednesday, Jul 21, 2004 at 21:23
Yeh, it was me.
Don't recall the figures at the moment, but I'll get them from my son when I get a chance.
The fuel bill will be interesting, (much too early to tell so far- but after 3/4 of a tank it's not noticeable yet), but like I say it goes like a big V8.
So far very impressed indeed, a lot more go than my own turboed 4.2.
AnswerID: 68906

Follow Up By: Member - Chris M (QLD) - Thursday, Jul 22, 2004 at 13:06

Thursday, Jul 22, 2004 at 13:06
Any luck with the figures?
FollowupID: 329435

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