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nova turbo diesel
Cars Modifications Aspects of car modifications (tuning, styling) (uk.rec.cars.modifications)
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#11
 
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Re: nova turbo diesel -
02-18-2004
, 08:46 PM
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"Dan405" <me (AT) privacy (DOT) net> wrote in message news:c10e0m$1d3bc9$1 (AT) ID-165560 (DOT) news.uni-berlin.de... "Theo" <theo*+*@*+*letsblowitup*.*com> wrote in message news:0LOYb.2160$5u7.20610168 (AT) news-text (DOT) cableinet.net... anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? I knew a guy once that had and took it to BB tuning - they did him a hybrid turbo, dump valve etc. Once stitched up a Saab Turbo up a motorway sliproad. Granted, it probly weighed about as much as a fag packet  Dump valve? Sounds like BB tuning stitched him up!! |
them - kit for the 306 TD is a very popular one. If i wasn't a bit hammered
and very sleepy, i'd be arsed to find a link for you
--
Dan
http://www.danontherun.com
#12
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"Dan405" <me (AT) privacy (DOT) net> wrote in message news:c10e0m$1d3bc9$1 (AT) ID-165560 (DOT) news.uni-berlin.de... "Theo" <theo*+*@*+*letsblowitup*.*com> wrote in message news:0LOYb.2160$5u7.20610168 (AT) news-text (DOT) cableinet.net... anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? I knew a guy once that had and took it to BB tuning - they did him a hybrid turbo, dump valve etc. Once stitched up a Saab Turbo up a motorway sliproad. Granted, it probly weighed about as much as a fag packet Dump valve? Sounds like BB tuning stitched him up!! Fair enough the dump valve on a diesel doesn't do shit, but you CAN get them - kit for the 306 TD is a very popular one. If i wasn't a bit hammered and very sleepy, i'd be arsed to find a link for you Granted, but if they sold that to him as a performance mod, then he was |
#13
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anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? I knew a guy once that had and took it to BB tuning - they did him a hybrid turbo, dump valve etc. Once stitched up a Saab Turbo up a motorway sliproad. Granted, it probly weighed about as much as a fag packet Dump valve? Sounds like BB tuning stitched him up!! Fair enough the dump valve on a diesel doesn't do shit, but you CAN get them - kit for the 306 TD is a very popular one. If i wasn't a bit hammered and very sleepy, i'd be arsed to find a link for you Granted, but if they sold that to him as a performance mod, then he was definately stitched up! |
--
Dan
http://www.danontherun.com
#14
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Exception to the rule of no throttle means no dump valve required. Sooner or later someone is going to fit a turbo to one of the latest bmw engines .... the petrol engine i'm thinking of has electrically operated valves, and has no throttle butterfly to restrict the air flow into the engine. (Essentially runs on full throttle all the while, with the valves providing the restriction). Scary stuff ... gimme a camchain any day!! |
And there is an auxilary butterfly used to provide vacuum for the brake
servo and to stop the engine grenading in the event of the valve lift motor
fubaring.
Tim..
#15
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anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? |
yes it is intercooled, but after about 85bhp its inadequate. However the
turbo is the restricting link in the chain- they wont allow the airflow to
generate much more than 85brake anyways- the comnpressor housing is too
small. Interestingly- like the 1.7 lump there is no wastegate- boost is
controlled as a product of the max fuelling at the pump and the compressor
being too small to flow any more air- so it naturally reaches a peak of
about 1bar.
To get a reliable 100bhp out of the 1.5 you'd need to port the head, fit a
larger intercooler and pipework and go to a T1.5 sized turbo with
appropriate trims / housings.
Tim..
#16
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I think he got it more for the sound anyway |
there'll never be enough back pressure to make it blow off. Again because
the diesel's intake is not throttled. All that happens when you lift off the
throttle is the diesel injection duration is reduced, so less exhaust gas
comes out, so the turbocharger gradually slows down and the boost pressure
gradually drops. Hence dump valve not activated.
I know many others have explained this, but I'm not sure you quite
understand yet so I'll try explain too;
On a petrol engine running at high boost, when the throttle pedal is
released this closes a butterfly valve which partially blocks the intake
manifold. The turbocharger however takes a second or two to slow down. At
this preceise moment, the turbocharger is blowing into a blocked manifold,
so the pressure rises rapidly. Without a dump valve this condition would
cause the turbocharger to stop spinning very suddenly, which may damage it.
The excess pressure may also blow flexible hoses in the intake system. A
dump valve releases this excess pressure safely, thus allowing the
turbocharger to decellerate at it's natural rate.
As you can now see, this condition cannot occurr on a diesel engine as the
intake tract does not contain a butterfly throttle valve.
James of Sunderland
#17
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It is cam chain driven though!! |
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#18
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"Theo" <theo*+*@*+*letsblowitup*.*com> wrote in message news:0LOYb.2160$5u7.20610168 (AT) news-text (DOT) cableinet.net... anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? yes it is intercooled, but after about 85bhp its inadequate. However the turbo is the restricting link in the chain- they wont allow the airflow to generate much more than 85brake anyways- the comnpressor housing is too small. Interestingly- like the 1.7 lump there is no wastegate- boost is controlled as a product of the max fuelling at the pump and the compressor being too small to flow any more air- so it naturally reaches a peak of about 1bar. To get a reliable 100bhp out of the 1.5 you'd need to port the head, fit a larger intercooler and pipework and go to a T1.5 sized turbo with appropriate trims / housings. |
and you wouldn't end up having to get one built with just the right spec to
give you 1.2bar
Matt
Quote:
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Tim.. |
#19
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" Tim (Remove NOSPAM." <the.farm (AT) NOSPAMbtinternet (DOT) com> wrote in message news:c12u99$snu$1 (AT) hercules (DOT) btinternet.com... "Theo" <theo*+*@*+*letsblowitup*.*com> wrote in message news:0LOYb.2160$5u7.20610168 (AT) news-text (DOT) cableinet.net... anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? yes it is intercooled, but after about 85bhp its inadequate. However the turbo is the restricting link in the chain- they wont allow the airflow to generate much more than 85brake anyways- the comnpressor housing is too small. Interestingly- like the 1.7 lump there is no wastegate- boost is controlled as a product of the max fuelling at the pump and the compressor being too small to flow any more air- so it naturally reaches a peak of about 1bar. To get a reliable 100bhp out of the 1.5 you'd need to port the head, fit a larger intercooler and pipework and go to a T1.5 sized turbo with appropriate trims / housings. Or a wastegated T25 which would be cheaper and easier as almost any would do and you wouldn't end up having to get one built with just the right spec to give you 1.2bar |
certain a T25 would be massively too big on a 1.5 diesel. It might *just*
have spooled up abit by 4000rpm! lol
Tim..
#20
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"**-**" <m.faulks (AT) btinternet (DOT) com> wrote in message news:c138l3$oea$1 (AT) titan (DOT) btinternet.com... " Tim (Remove NOSPAM." <the.farm (AT) NOSPAMbtinternet (DOT) com> wrote in message news:c12u99$snu$1 (AT) hercules (DOT) btinternet.com... "Theo" <theo*+*@*+*letsblowitup*.*com> wrote in message news:0LOYb.2160$5u7.20610168 (AT) news-text (DOT) cableinet.net... anyone know of tuning for this beast? is it possible to get 100hp from the isuzu TD, and does it have an intercooler as std? yes it is intercooled, but after about 85bhp its inadequate. However the turbo is the restricting link in the chain- they wont allow the airflow to generate much more than 85brake anyways- the comnpressor housing is too small. Interestingly- like the 1.7 lump there is no wastegate- boost is controlled as a product of the max fuelling at the pump and the compressor being too small to flow any more air- so it naturally reaches a peak of about 1bar. To get a reliable 100bhp out of the 1.5 you'd need to port the head, fit a larger intercooler and pipework and go to a T1.5 sized turbo with appropriate trims / housings. Or a wastegated T25 which would be cheaper and easier as almost any would do and you wouldn't end up having to get one built with just the right spec to give you 1.2bar Havent done the calcs or looked at the compressor maps, but i'd be fairly certain a T25 would be massively too big on a 1.5 diesel. It might *just* have spooled up abit by 4000rpm! lol Tim.. |
sufficent to spool a small trim T25 sufficently to produce boost by a
reasonable RPM. Depends if you've got the cash and want to spend it on a
Nova diesel to get a turbo made up to exactly the correct spec, or spend a
reasonable amount and slightly bodge it. I'd guestimate you'd have 1500rpm
of decent power band. If someones got the VE of a 1.5 Isuzu derv lump I'll
run the numbers.
Matt
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