AUDI TURBO
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WOULD I FEEL ANY DIFFERNCE GETTING A NEW KO3 TURBO?? AND IF I GET JUST A UPRATED EXHAUST MANIFOLD WHAT BHP INCREASE WOULD I EXPECT??
SERIOUS UPGRADE QUESTION
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AUDI TURBO
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found a good manifold on ebay for about £200.00. and checked turbo last night where my acuator rod joins to turbo it loose hte washeres etc knackered so no way is that tubo
AUDI TURBO
Registered User
with a ko3 not sure any other manifold will see much benefit.
i think i'm right in saying that it's preferble, but not always possible, to get a equal length manifold.
usually going for a really free flowing larger ported manifold isn't always desirable as i think you need to keep the air pressure/flow higher through the exhaust system to the turbo. (imagine a river that narrows, the water flow will speed up throught he narrow section, which when applied to air in a turbo system, means the air will speed up and drive the turbo)
any way i'm in no way a fluid dynamics expert and i'm sure someone more knowledgable will make a comment.
the biggest concern on manifolds i think on the a4 turbo is that they are prone to cracking.
i think i'm right in saying that it's preferble, but not always possible, to get a equal length manifold.
usually going for a really free flowing larger ported manifold isn't always desirable as i think you need to keep the air pressure/flow higher through the exhaust system to the turbo. (imagine a river that narrows, the water flow will speed up throught he narrow section, which when applied to air in a turbo system, means the air will speed up and drive the turbo)
any way i'm in no way a fluid dynamics expert and i'm sure someone more knowledgable will make a comment.
the biggest concern on manifolds i think on the a4 turbo is that they are prone to cracking.
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if you upgrade to a K03 then you want the K03s as you could yeild about 210-220bhp with the correct map but to be honest it not worth it just go bigger or have the K03 upgraded or just fix the Actuator rod and see how you get on from there.
AUDI TURBO
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AUDI TURBO
Registered User
or if im low on cash ill get a ko3s turbo i dont want HUGE power. any links for a ko3s turbo?? and would that turbo be straight swap?? and would new manifold benifit more on ko3s?
billybravo
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what about that guy in poland who does the better housing on your std turbo?? think Byans had one.??
that might be a way of going?
that might be a way of going?
Unless you are going to get a Huge turbo, a manifold will not yield any increases, in fact it will probably lose you torque and power as its the turbo that runs out of puff long before the manifold becomes a problem. If you contact Mark @ backdraft motorsport he can do you a ko3s for around £299 brand new iirc, that and a new map will net you around 220 i would think. If you do not get it mapped, it will feel faster but will actually only nett a small increase. I put a K04-15 on a K03 map and only gained 6 bhp
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Will this help
Here we have a 2001 Audi S3 approximately 50,000 miles with the following modifications:
Green Cotton Panel Filter
Forge TIP
Milltek Cat-Back System
Custom-Code Phase One
Every other component is standard.
The car has now been fitted with the hybrid JBS 05 turbo, 4 bar fuel pressure regulator and Custom-Code Phase Three.
Please note standard downpipe, cats, manifold and intercoolers!
For the stage one, we decided to run a maximum boost of 1.8bar spike, tailing to a constant 1.4bar to the redline. Please see VAG COM log below.
Engine Speed Load Cmd Pressure Press @ Intercool
TIME
STAMP /min % mbar mbar
24.64 1920 106.8 1840 1330
24.95 1920 109 1860 1340
25.24 1960 111.3 1870 1350
25.55 2000 112.8 1900 1370
25.85 2040 115.8 1950 1390
26.16 2080 118.8 1990 1420
26.45 2120 121.8 2020 1440
26.76 2160 125.6 2040 1470
27.06 2200 130.1 2040 1490
27.37 2280 134.6 2060 1550
27.67 2360 141.4 2080 1610
27.97 2440 149.6 2100 1680
28.26 2520 160.2 2130 1780
28.57 2600 175.2 2150 1930
28.87 2720 191.7 2160 2110
29.18 2840 191.7 2180 2350
29.48 3040 191.7 2220 2540
29.78 3280 191.7 2290 2540
30.07 3440 191.7 2380 2540
30.38 3720 191.7 2390 2540
30.69 3960 191.7 2400 2540
30.99 4240 191.7 2390 2540
31.29 4440 191.7 2390 2540
31.59 4680 191.7 2380 2540
31.89 4880 191.7 2360 2540
32.19 5040 191.7 2370 2510
32.49 5240 191.7 2360 2460
32.8 5400 191.7 2380 2480
33.1 5520 191.7 2390 2460
33.4 5680 191.7 2410 2440
33.7 5800 191.7 2400 2420
34 5920 191.7 2330 2440
34.31 6000 191.7 2290 2390
34.61 6080 191.7 2240 2380
34.91 6200 191.7 2210 2470
35.21 6280 184.2 2170 2500
35.52 6360 181.2 2150 2450
35.82 6440 171.4 2110 2540
36.12 6520 166.2 2100 2510
36.42 6560 151.1 2080 2420
As you can see, the turbo is quite capable of holding over 1.4bar at the redline and is fully controlled via the N75 valve. The offset you see between actual and requested is due to the 10psi wastegate actuator. A few tricks were needed in the Custom-Code Phase Three mapping to achieve this. We fuelled it at around 0.79 on spike tailing to 0.81 at redline. Maximum EGT recorded was 700˚C, this means no glowing manifolds or turbine housings!
The results speak for themselves.
As you can see from the dyno and logs, we now have near factory spool and a massive increase in both BHP and torque. Not to mention up to 1.5bar at 6.5k plus.
We then decided to see just how far we could push this turbo on the standard manifold, downpipe and cats. The limiting factor became a combination of these three components. We managed to hold just over 1.5bar at 7k with a maximum EGT of 850˚C which is as high as we would ever want to go, but just shows what is possible. We were also very near to total saturation of the MAF element at 240g/s. We also increased ignition timing by approximately 8˚ below spool which can be clearly seen on the dyno graph in the form of extra torque low down.
Please see the dyno graph below.
We firmly believe that with just a high flow down pipe and de-cat a totally reliable 300-310BHP as well as 330-340lb ft is readily available. With the addition of our JBS Tubular Collected High Flow Manifold, up to 340BHP and 360lb ft will be on tap. We have now officially put this turbo into production and we are taking orders on our first batch of 10 as of now.
Specification and prices below.
Modified compressor housing inlet
C.N.C re-profiled compressor cover for high flow
350bhp capable billet custom compressor wheel
Modified seal plate
360 degree performance thrust bearing
Hybrid K04 large trim left hand thread turbine wheel
Lightening and balancing of turbine wheel for faster spool up
Modified turbine housing
Up-rated twin turbine seals
Cryogenically treated components
10psi wategate actuator set up with the option to upgrade
BRAND NEW JBS05 turbo unit (not exchange) £1150.00+VAT
Exchange basis JBS05 (as long as the old unit is in useable condition) £850+VAT
JBS Tubular Collected manifold (not equal length) £450+VAT
Custom-Code Phase 3 mapping £550+VAT (reduced from £650)
Fitting of the manifold and turbo can be done for an extra £279.45+VAT - This includes labour, gaskets, oil, oil filter and coolant.
Customers who already have a Custom-Code remap will receive a 33% discount on their phase three price. The JBS 05 hardware and software package is also available from Custom-Code agents.
Many thanks for all the interest in the development of this product.
I would have thought 475cc injectors would be stretched with a 3071 (and I wouldn't use them personally on a 28rs either) go with 550cc or 630cc for some scope to up boost
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