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1.4 TDI standard boost pressure at 2.3 bar???


g-man85
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70-90 hp 1.4 TDI

Configuration

Diesel 1422 cc (86 in³) inline three cylinder

Block

bore * stroke 79.5 * 95.5, grey cast iron

Head

2 valves, overhead camshaft, 18 to 19.5 compression ratio

Aspiration

variable turbine geometry tubocharger, intercooler, 2.3 bar absolute boost

Fuel

Pump direct injection,(PD Pump injector, Pumpe-Düse) Bosch EDC 15 engine management

Exhaust

Oxidating catalityc converter, exhaust gas recirculation, EU4 limits

Dimensions

127 kg

Output

51 kW (70 hp) @ 4000 rpm, 155 N·m between 1600 and 2800 rpm

55 kW (75 hp) @ 4000 rpm, 195 N·m (144 ft·lbf) @ 2200 rpm

59 kW (80 hp) @ 4000 rpm, 195 N·m @ 2200 rpm

66 kW (90 hp) @ 4000 rpm, 230 N·m from 1900 to 2300 rpm

Does that mean that the little 1.4 TDI's actually run at 2.3 bar of boost, as thats an awful lot of boost biggrin.gif style="vertical-align:middle" emoid=":D" border="0" alt="biggrin.gif" />

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the actuall boost varies and is adjustable too.... but 2.3bars sounds about right for a chipped one

Mmmm... coffee.gif style="vertical-align:middle" emoid=":coffee:" border="0" alt="coffee.gif" />

However keep reading somewhere about most VAG diesel engines being only good at having being run at 18psi tops, even when chipped. Nfbr, I currently get 18psi in first then holds around 17psi now with mine being map'd.

Is there much difference between the actual components on the 75hp and the 90hp lumps found in the A2?

Edited by g-man85
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Is 2.3Bar absolute not actually 1.3bar relative which equals

out to about 17-18psi in reality anyway........

or am I just confusing myself. I could be wrong on this but I thought

1 Bar was 14.(something) psi which means your 'chipped' and std

pressure figures are in fact the same??

confused.gif style="vertical-align:middle" emoid=":confused:" border="0" alt="confused.gif" />

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Is 2.3Bar absolute not actually 1.3bar relative which equals

out to about 17-18psi in reality anyway........

or am I just confusing myself. I could be wrong on this but I thought

1 Bar was 14.(something) psi which means your 'chipped' and std

pressure figures are in fact the same??

confused.gif style="vertical-align:middle" emoid=":confused:" border="0" alt="confused.gif" />

Matt, your not confused, your correct, you have to deduct atomspheric pressure from absolute. Atmposhepheric is normally quite close from 990 millibars to 1 bar, so 1.3 bar is correct which is 18.8604 psi,

John

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Well getting my car put on the rollers later for a power run! smile.gif style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" /> Rollers are new and just been calibrated so hopefully should be accurate!

Will post my results up too!

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