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+--- Thread: Over boosting ??? (/showthread.php?tid=17504)
Over boosting ??? - Dan306DT - 21-09-2013
I've finally sorted my problem out with this under boosting issue but now I have it boosting at 26 psi when in 4th with my foot down is that too much so should I turn it down a little ?? If feels like it's got not to give but it's missing something and I don't no what it is ??
RE: Over boosting ??? - silverzx - 21-09-2013
No such thing as "over boost" on an XUD.
Man the f*ck up!
RE: Over boosting ??? - Tom - 21-09-2013
(21-09-2013, 01:08 PM)silverzx Wrote: No such thing as "over boost" on an XUD.
Man the f*ck up!
Hahahaha just read the title and in my head said theres no such thing and you beat me to it!
RE: Over boosting ??? - adamm306 - 21-09-2013
(21-09-2013, 01:00 PM)Dan306DT Wrote: I have it boosting at 26 psi when in 4th with my foot down is that too much so should I turn it down a little ?? If feels like it's got not to give but it's missing something and I don't no what it is ??
yeah its called 5th gear
RE: Over boosting ??? - Martin306 - 21-09-2013
If you have boost, and no poke, you need more smoke.
That worked for me on the 405 I had anyway
What's it like in other gears?
RE: Over boosting ??? - Dan306DT - 21-09-2013
There's smoke and some poke fuel pumps up as much as it will go xx
RE: Over boosting ??? - adamm306 - 21-09-2013
(21-09-2013, 01:10 PM)adamm306 Wrote:(21-09-2013, 01:00 PM)Dan306DT Wrote: I have it boosting at 26 psi when in 4th with my foot down is that too much so should I turn it down a little ?? If feels like it's got not to give but it's missing something and I don't no what it is ??
yeah its called 5th gear
as I said dump the clutch move to 5th and put your foot down again and tell us the results
RE: Over boosting ??? - Dan306DT - 21-09-2013
29 psi haha
RE: Over boosting ??? - Piggy - 21-09-2013
whats wrong?!
Im confused
RE: Over boosting ??? - Martin306 - 21-09-2013
(21-09-2013, 03:55 PM)Dan306DT Wrote: 29 psi haha
*facepalm*
I think they meant, does the car start accelerating again. lol
As in, you're revving it too hard. In diesel, revs are bad. Boost, torque and low revs are good
RE: Over boosting ??? - 4WayDiablo - 21-09-2013
(21-09-2013, 04:28 PM)Martin306 Wrote:(21-09-2013, 03:55 PM)Dan306DT Wrote: 29 psi haha
*facepalm*
I think they meant, does the car start accelerating again. lol
As in, you're revving it too hard. In diesel, revs are bad. Boost, torque and low revs are good
Revving a diesel hard isn't that bad!
@op. 26 is OK, its at the limits
RE: Over boosting ??? - Martin306 - 21-09-2013
(21-09-2013, 05:26 PM)4WayDiablo Wrote:(21-09-2013, 04:28 PM)Martin306 Wrote:(21-09-2013, 03:55 PM)Dan306DT Wrote: 29 psi haha
*facepalm*
I think they meant, does the car start accelerating again. lol
As in, you're revving it too hard. In diesel, revs are bad. Boost, torque and low revs are good
Revving a diesel hard isn't that bad!
@op. 26 is OK, its at the limits
True, but it's not that efficient? Saying that, my NAD got to 5000rpm on the rollers and the HP still hadn't peaked. Got to 61hp.
RE: Over boosting ??? - Piggy - 21-09-2013
if its burning fuel cleanly and continuing to make power....then its efficient
RE: Over boosting ??? - Martin306 - 22-09-2013
(21-09-2013, 10:09 PM)Piggy Wrote: if its burning fuel cleanly and continuing to make power....then its efficient
We're talking about XUDs here
I meant generally.
RE: Over boosting ??? - Ruan - 22-09-2013
If you don't need all the boost to burn all the fuel you're supplying, then more boost than required places more strain on the turbo and intercooling system... Also the pumping losses of the engine having to compress even more air in the cylinders is kinda pointless... Turn it down to the sweet spot of no smoke, but not higher than it need be.
RE: Over boosting ??? - Piggy - 22-09-2013
(22-09-2013, 08:41 AM)Martin306 Wrote:(21-09-2013, 10:09 PM)Piggy Wrote: if its burning fuel cleanly and continuing to make power....then its efficient
We're talking about XUDs here
thats a pretty general rule to be honest.
people would say an evo8 that produces 400bhp is really inefficient...
well 25mpg isnt great...but its efficient when you consider the amount of power it produces for the fuel it uses
RE: Over boosting ??? - Martin306 - 22-09-2013
(22-09-2013, 08:40 PM)Piggy Wrote: thats a pretty general rule to be honest.
people would say an evo8 that produces 400bhp is really inefficient...
well 25mpg isnt great...but its efficient when you consider the amount of power it produces for the fuel it uses
It's not 25mpg when it's producing 400hp though, so it is inefficient?
An Aston Martin can do 25mpg and produce the same power. (6.0 V12)
Not a valid argument, but the Aston would probably be more efficient at high rpms than an evo producing the same power. I go off topic no more.
RE: Over boosting ??? - Piggy - 22-09-2013
exactly. so aston have to use 3 times as many cylinders and 3 times as much capacity to get the same power.
an evo isnt a great example to be honest...more modern turbo petrols and diesels would be better to demonstrate but its still valid
RE: Over boosting ??? - Martin306 - 23-09-2013
(22-09-2013, 09:43 PM)Piggy Wrote: exactly. so aston have to use 3 times as many cylinders and 3 times as much capacity to get the same power.
an evo isnt a great example to be honest...more modern turbo petrols and diesels would be better to demonstrate but its still valid
Trust me, NA power delivery is so much better, 12 cylinders sounds better too, less stress on engine parts as well so longer life
Every car should be a V12.
RE: Over boosting ??? - Dean - 23-09-2013
(23-09-2013, 07:33 PM)Martin306 Wrote: Every car should be a V12.
This^
RE: Over boosting ??? - Piggy - 23-09-2013
(23-09-2013, 07:33 PM)Martin306 Wrote:(22-09-2013, 09:43 PM)Piggy Wrote: exactly. so aston have to use 3 times as many cylinders and 3 times as much capacity to get the same power.
an evo isnt a great example to be honest...more modern turbo petrols and diesels would be better to demonstrate but its still valid
Trust me, NA power delivery is so much better, 12 cylinders sounds better too, less stress on engine parts as well so longer life
Every car should be a V12.
but consider the price!!
can you get a v12 vantage or db9 for 7grand!?
RE: Over boosting ??? - Martin306 - 23-09-2013
(23-09-2013, 08:07 PM)Piggy Wrote:(23-09-2013, 07:33 PM)Martin306 Wrote:(22-09-2013, 09:43 PM)Piggy Wrote: exactly. so aston have to use 3 times as many cylinders and 3 times as much capacity to get the same power.
an evo isnt a great example to be honest...more modern turbo petrols and diesels would be better to demonstrate but its still valid
Trust me, NA power delivery is so much better, 12 cylinders sounds better too, less stress on engine parts as well so longer life
Every car should be a V12.
but consider the price!!
can you get a v12 vantage or db9 for 7grand!?
You might get a DB7 for that if you know where to look
Or a Jaguar XJ-S with IDF Weber (same car but SOHC)Anyways, I'll post no more. I'm trying to stay away from spamming.
RE: Over boosting ??? - Piggy - 23-09-2013
nah I spam till get told off!!!
db7s are pretty...but just pretty xjs's. which are a rubbish car imo. And I love jags!
RE: Over boosting ??? - Carlos182 - 23-09-2013
(23-09-2013, 09:02 PM)Piggy Wrote: nah I spam till get told off!!!
db7s are pretty...but just pretty xjs's. which are a rubbish car imo. And I love fags!
Bit off topic?!
RE: Over boosting ??? - Ruan - 23-09-2013
(23-09-2013, 07:33 PM)Martin306 Wrote:(22-09-2013, 09:43 PM)Piggy Wrote: exactly. so aston have to use 3 times as many cylinders and 3 times as much capacity to get the same power.
an evo isnt a great example to be honest...more modern turbo petrols and diesels would be better to demonstrate but its still valid
Trust me, NA power delivery is so much better,
I don't trust you in the slightest!
RE: Over boosting ??? - scottbmxer - 01-10-2013
(22-09-2013, 08:11 PM)Ruan Wrote: If you don't need all the boost to burn all the fuel you're supplying, then more boost than required places more strain on the turbo and intercooling system... Also the pumping losses of the engine having to compress even more air in the cylinders is kinda pointless... Turn it down to the sweet spot of no smoke, but not higher than it need be.
Now you have said that how is a td04 @25psi with a welded wastegate and 9mm bosch?