GQ turbo question
Submitted: Friday, Nov 04, 2005 at 16:39
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Gossy
I have a 2.8TD GQ (1996). I have looked everyone with no avail (including the Gregorys handbook). At what revs does the factory turbo officially kick in?
Ta,
Reply By: hl - Friday, Nov 04, 2005 at 16:44
Friday, Nov 04, 2005 at 16:44
Hi,
There no "magic" rpm when they come in... The start spinning as soon as the engine fires....
In the 2.8 Nissan it will start producing useful boost around 1500 rpm.
cheers
AnswerID:
137795
Reply By: Member - John - Friday, Nov 04, 2005 at 16:46
Friday, Nov 04, 2005 at 16:46
Gossy,
mine used to kick in about 2500 rpm, until I fitted a Turbosmart boost controller, it started to come in at about 2100 or there abouts after fitting it... Hope that helps?
AnswerID:
137797
Reply By: Gossy - Friday, Nov 04, 2005 at 17:14
Friday, Nov 04, 2005 at 17:14
this seems to be a bit of a black art with no definite answer as Hl says 1500 and John says 2500rpm.
Cheers,
AnswerID:
137809
Follow Up By: JD-100RV - Friday, Nov 04, 2005 at 20:12
Friday, Nov 04, 2005 at 20:12
Just to add more fuel to your dilemma. I'm quite sure my 2.8TD boosts around 1750rpm. It's quite noticeable when you hold your foot steady on the gas so your revs are slowly rising and all of a sudden you get thrown back in your
seat. Not really with that tiny turbo. You will see your revs start to increase much faster though, when you get to that boost point.
FollowupID:
391441
Follow Up By: Member - John - Friday, Nov 04, 2005 at 22:11
Friday, Nov 04, 2005 at 22:11
OOPs, was a while ago, pretty sure they are the right figures, LOL I did have a boost gauge.
FollowupID:
391456
Reply By: Member - Roachie (SA) - Friday, Nov 04, 2005 at 23:47
Friday, Nov 04, 2005 at 23:47
As one of the other blokes said, the turbo starts spinning as soon as you start the motor. However, to find out when it starts to be of any "assistance" to your forward progress, I'd suggest you get hold of a boost gauge......you'll find the boost starts anywhere between 1000 and 2000 rpm and will "max-out" some time later (depending on how it's set up as far as waste-
gate goes etc).
I am a great believer that all turbo vehicles should be fitted with both a boost and egt gauges if the driver wants to know what the donk is actually doing. The tacho is a very poor indicator of what your motor is "up to".
Cheers
Roachie
AnswerID:
137879
Reply By: Alloy c/t - Saturday, Nov 05, 2005 at 19:19
Saturday, Nov 05, 2005 at 19:19
Dont know about the Nissan ,but in my 80 series 92mod, useable boost starts at 1350rpm , father inlaws 80 series 96mod [24valve] boost starts at 1600rpm ,and brother inlaws 100 series 03mod kicks in at 1500rpm. Luck of the draw ??? wtf.
AnswerID:
137949
Follow Up By: prado_95 - Monday, Nov 07, 2005 at 23:25
Monday, Nov 07, 2005 at 23:25
All those engines are different, with different torque curves.
The 1HD-T was reknown for pulling better at low revs than the higher tech later 1HD-FT engine. 1HD-FTE fits the same category as 1HD-FT - except it has more torque than 1HD-FT across the rev range.
An adjustment to the fuel system will restore the lower rev performance
Dave
ENG-TEK
FollowupID:
391991
Reply By: Gossy - Monday, Nov 07, 2005 at 11:51
Monday, Nov 07, 2005 at 11:51
As Roachie mentioned, the reason why I have asked this question is to simply better understand my vehicle. Once I know what it should be doing, it's easier to know when things are not working correctly.
The boot guage seems like a good idea.
Thanks everyone for the replies.
AnswerID:
138226