Race Engine Forum UK

Hi to all.

This is my car. I invested a lot of my free time in it,
as i done all the modifications by myself.


Alfa 155 Q4

CPS forged pistons
Colombo&Bariani stret max cams
Ported and polished head
Polished and balanced conrods
lightened flywheel balanced with crankshaft
Custom made inlet and exhaust manifold
Siemens DEKA 650 cc injectors
Walbro high flow 255l fuel pump
12mm head bolts
Spesso group A headgasket
Garrett GT35R
3" freeflow exhaust
Front mounted intercooler
Eibach springs
Brembo 308mm discs and 4 pot calipers
Innovative wideband lambda and datalogger
3 bar MAP sensor
Custom made chip


370 hp@1.3 bar boost
~500 hp@2 bar boost
Acceleration 100-200 km/h 7.8 s


Acceleration movie 30-200 km/h




























This is rolling road graph at 1.3 bar boost:





This is acceleration graph from datalogger at 1.85 bar boost, and datalogger dials:

Wow thats awesome! total sleeper, no one would even know from outside that it was a total rocket.

Very Very Impresive,
Is the Alfa reliable running that kind of Bhp?

madmurdoch wrote:Very Very Impresive,
Is the Alfa reliable running that kind of Bhp?

I'm currently changing the turbo (some old big holset) for Garrett dual ball bearing GT35R. Holset reached full boost at 6400 RPM. When i raised ignition cut to 8000 RPM in order to get good performance crankshaft bearings failed.

Before that engine ran without any problems for 10 000 kms with ignition cut set to 7500 RPM.

GT35R will reach full boost at around 4800 RPM so i can set ignition
cut back to 7500 RPM.