Author Topic: vnt turbos  (Read 5733 times)

James5

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« Reply #15 on: 23:22, Wed 21 January 2009 »
Quote from: "jimmy_b"
i bought my VNT off ebay complete with the downpipe elbow for 350, thinking that even if it needs a rebuild its still going to same me a packet, luckily though it was ok.

its good being able to choose when the boost comes in but ive yet to perfect mine to how i would like it to be


It does take alot of fettling to get the VNT to boost how you want it to I ended up setting mine up so I would have full 24psi manifold boost @ 2800rpm the torque steer was unbelivable not to sure how markey b manages to get any traction with 27psi of boost.

Even when I had fueling and water injection problems I still managed to get 197.7bhp @ only 16psi.

markeyturbo

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« Reply #16 on: 00:49, Thu 22 January 2009 »
Quote from: "Jame5_GTT"
not to sure how markey b manages to get any traction with 27psi of boost.


on a mildly damp day it spins in every gear, i've learnt how to drive it to expect the big kick and can counteract it with less throttle

i do run it at 14psi day to day however, still very nippy and will see off most cars lol

markeyturbo

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« Reply #17 on: 00:51, Thu 22 January 2009 »
Quote from: "jure"
I got that part about changing jets and drilling but I know that carb bowl often runs out of fuel under boost and that is reason why I asked how he manages to keep it good under sudden 27 psi.


other than an FSE pressure regulator and a modified float needle not alot has been done... i think its just alot of luck or some sort of renault voodoo lol

jure

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« Reply #18 on: 07:15, Thu 22 January 2009 »
Voodoo indeed   8)

How high do you VNT owners rev the car?

5teve L

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« Reply #19 on: 08:36, Thu 22 January 2009 »
James had his car revved to 7800rpms on the rollers  :shock:

I was also about to start to play with an adjustable fuel reg & try different base pressures to see if it would help with a larger needle jet, still got the brand new reg sitting in my drawer as i never tested it :(

James5

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« Reply #20 on: 12:58, Thu 22 January 2009 »
Quote from: "5teve L"
James had his car revved to 7800rpms on the rollers  :shock:

I was also about to start to play with an adjustable fuel reg & try different base pressures to see if it would help with a larger needle jet, still got the brand new reg sitting in my drawer as i never tested it :(


My car being revved to 7800rpm :shock:




markeyturbo

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« Reply #21 on: 14:36, Thu 22 January 2009 »
crazy fool! lol

my limiter is set to 7k

frix

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« Reply #22 on: 15:13, Thu 22 January 2009 »
i want one, whos gonna sell me one?   :)

5teve L

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« Reply #23 on: 17:48, Thu 22 January 2009 »
Quote from: "Jame5_GTT"
Quote from: "5teve L"
James had his car revved to 7800rpms on the rollers  :shock:

I was also about to start to play with an adjustable fuel reg & try different base pressures to see if it would help with a larger needle jet, still got the brand new reg sitting in my drawer as i never tested it :(

My car being revved to 7800rpm :shock:



That was running 16 psi with a spike IIRC & it still made 197bhp...
Compared to mine revving to just over 6k & making 207bhp with a T25 @ 20psi with a boost flustuation up top (bloody Apexi boost controller, you can see it dip in boost if you watch closely)
Clicky

markeyturbo

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« Reply #24 on: 19:08, Thu 22 January 2009 »
here is mine...


http://uk.youtube.com/watch?v=DLdAbSx6jAE

http://uk.youtube.com/watch?v=DLdAbSx6jAE

you can hear the VNT 'pop' onto full chat.

the start bit is funny.. the dyno operator aborted the run as he didn't realised that it spiked to 30psi and thought there was a problem lol

markeyturbo

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« Reply #25 on: 19:10, Thu 22 January 2009 »
just watched them and they aint actually power runs... but here is one:

http://uk.youtube.com/watch?v=ea1EO8OhRKw