beaver34
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| posted on 26/9/10 at 07:06 PM |
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external wastegate
im going to be running a gt2871r turbo on my engine at 20psi am i better using a external wastegate over a stock setup im having a custom manifold
made so the fitting of it would not be an issue
im still learing alot about f/i so any help would be great
thans
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tomgregory2000
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| posted on 26/9/10 at 07:17 PM |
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no idea im afraid but external's look the nuts 
i have to ask, how much power are you planning to be making?
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beaver34
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| posted on 26/9/10 at 07:21 PM |
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quote:
Originally posted by tomgregory2000
no idea im afraid but external's look the nuts
i have to ask, how much power are you planning to be making?
thanks,
im happy with 250bhp, the engine builder seems to have other plans we will see how it goes but i can see it making 300+ at this rate
who am i to ask i do as im told,
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tomgregory2000
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| posted on 26/9/10 at 07:25 PM |
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to make 250bhp on my engine its about 10-12psi on a std t28 turbo and with that amount of boost on that turbo you should be up to 360-380bhp.
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beaver34
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| posted on 26/9/10 at 07:29 PM |
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quote:
Originally posted by tomgregory2000
to make 250bhp on my engine its about 10-12psi on a std t28 turbo and with that amount of boost on that turbo you should be up to 360-380bhp.
i dont really want the kind of power i dont think, hell that gives me 750bhp per ton
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Antnicuk
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| posted on 26/9/10 at 07:42 PM |
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it all depends on the type of engine you have, what your turbo has, ie, internal wastegate, if so, what size is it. They can be ported to flow
more. If your spec is fairly common you should be able to find out what others have done. I would say dont fit an external unless you have to as its
extra weight, complication and plumbing.
I ran an internal on my To4E as it had one but i couldnt control boost so i welded it shut and fitted a 60mm external (which is huge) and a little too
big for my E but im just about to fit a TO4Z so i was kinda planning ahead.
600 BHP per ton, Stylus Brought back from the dead! Turbo Rotary Powered!
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beaver34
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| posted on 26/9/10 at 08:07 PM |
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It's a 1600 sigma zetec engine, there went any examples really that have been turbo properly
I am buying a new gt2871r and have the choice of internal or external from the turbo spec
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Ivan
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| posted on 26/9/10 at 08:20 PM |
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Running 20psi is going to give you well over 300bhp on a Nissan motor and unless you spend lots of money on internals also going to give you
reliability issues and possibly require a larger intercooler and radiator than you can comfortably fit in a Locost. All this will impact on overall
weight as well that will impact on handling. It might also mean race fuel only (not sure what octain is available at commercial pumps but am pretty
sure you will need 102 octane minimum.
Also the right size turbo to properly flow 20psi will give you driveability problems with a light weight car due to lag and other such turbo maladies.
The main reason for a Locost is handling and too much lag will spoil that so think carefully about the spec the builder is recommending.
Also if you are producing close to 400 bhp make sure your drivetrain and chassis can handle it.
Otherwise that sort of power is but might actually spoil the fun and driveability of the car.
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westy turbo
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| posted on 26/9/10 at 08:36 PM |
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38mm on mine but on 2000 cc,BUT had the same on my 1.6 vaux engine and worked fine
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beaver34
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| posted on 26/9/10 at 09:00 PM |
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Thanks for the help guys,
It's not a Nissan unit, it's a ford 1.6 sigma it has a worked crank proper pistons and rods super 1600 head as for the rest of the car in
all fairness it's not a locket build I have a Quaife box plated rear tran x diff I have a big alloy rad and I'm having a custom cooler
made for the car
What power did you 1.6 make west turbo?
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Stott
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| posted on 26/9/10 at 09:01 PM |
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20psi doesn't need an external in my opinion, and also I think this would be the case if you asked some engine builders, but having an
external
a) looks good
b) sounds good
c) gives you the option to run mega boost in the future with stable wastegate control
but they usually work out more expensive, and are one more thing to come loose and lose you all your boost (as happened to a Radical SR3 at
Llandow last Sat)
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CNHSS1
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| posted on 26/9/10 at 09:23 PM |
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i used external on my hillclimber (1800cc nissan motor) after originally using internal WG. Ext gave better, more accurate boost management making
mapping easier, less boost spiking allowing the power curve to be nice and smooth. I used a VAG boost solenoid to control the ext WG from an Audi TT
225hp too (the 180hp looks the same but flows less) thru an Emerald MDK3 ecu
"Racing is life, everything else, before or after, is just waiting"---Steve McQueen
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westy turbo
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| posted on 27/9/10 at 05:14 AM |
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^ what he said 
just the cost is the problem
but if i were you ill use the 2560 series for minimum lag.....in my case used the 2876 and its 2 litre engine! on my 1.6 had 260hp at 1.3bar with an
28rs
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