80Q Competition 20VT inside¡¡

[prj]

This car is a wreck...
* Many hoses were put on pretty bad, blew them off like 5-6 times.
* Too thick clamps and too short hoses in some places.
* The throttle doesn't shut fully after opening, making the thing idle like sh*t, need a stiffer spring in there...
* The oil catch is into a bottle which sprays through the entire engine bay
* Alignment is off
* Strong vibration over 140kph
* Alternator belt broke
* Dash not working (4 cyl dash)
* Oil pressure gauge/sensor broken
* Lights were pointing to the sky
* All the connectors and cabling are like a ratsnest in the engine bay, everything needs to be tidied up
* The car was draining the battery, traced it to a lambda
* The suspension is very soft, bushes need changing for sure
* Airbag light is on all the time
* There was a million boost leaks, injector inserts, etc
* The MAF on suction side was connected very badly with lots of air leaking everywhere.
* There is an oil leak from the pressure sensor
* The clutch makes noise when engaging
* The car makes a noise when turning left
* 2nd gear pops out every now and then, 6th gear is very hard to get into, due to the linkage.
* The fuel pump was not relayed, so the fuel pressure was tapering
* The EVAP is connected into the heating system somehow, so if you put the heat on the car is full of gasoline fumes.
* And finally, I got stopped by the police twice in 2 days working on this damn thing. Luckily both times the car was stopped quietly, so no fines...

So as you can see, lots to do with the car...

As for the good part, I am almost done with the thing. Most of the time was spent fixing various hoses, relaying fuel pump, etc etc... Hopefully can fix the alternator belt tomorrow.

So, some figures:
* 2.2 bar peak boost
* Full boost at 4200 rpm in 3rd
* 1.9 bar at 7000 rpm
* 1.8 bar at 7500 rpm
* 89% IDC on 630cc injectors with 11.9 AFR

The way this engine breathes is quite amazing.
The engine could use a slightly bigger turbo to uncover the full potential of the high lift cams, but it is nice to drive as is as well...
It has 19" low profile tyres, it has absolutely no traction in 1st, and it has no traction in 2nd after 5500 rpm.

Calculating the IDC, would give about 570-580 horsepower, and I would say this is on the mark. Cylinder filling is similar to what a stock head gives with 2.5+ bar boost.
245 load at 5000 rpm and 200 load at 7500 rpm.

Tomas is scared driving the car, so I guess mission accomplished.
Going to slightly finetune the cold start tomorrow, and then it's ready.

[prj]

FATS 2.5 seconds...

[EspenW]

Now we're talking
That is a 0.2s better FATS time than a 90Q running close to 700hp. Thanks to the boost/torque/power coming in earlier. Street performance is all about average power available, something this car has in spades
What is the approximate weight?

[EspenW]

Stock B5 RS4 gearbox and 235/35/19 tires, correct?

[EspenW]

At this level, the FATS time is usually approx 0.2s longer than the 60-90mph time, indicating a 60-90 time of approx 2.3s on this car.
To put that time into perspective:
Bugatti Veyron is 2.1s.
Yamaha R1 is 2.15s
McLaren F1 is 2.4s
Ferrari Enzo is 2.4s
McLaren MP4-12C is 2.4s
Porsche Carrera GT is 2.4s
997.2 Turbo S is 2.7s
ZR-1 is 2.7s
Ferrari 458 is 2.8s
Stock RS2 is 5.2s

[A80Avant]

those results sound very good!

turbo spooling at 4200 could also have to do with the head porting and cam profile(?) as it was expected to be sooner than that?

[Billman]

Very nice results!!! Congratulations! Now we want a Video.

Do you mind sharing a list of the mods and parts you have right now and maybe the tuning log from PRJ?

[prj]

those results sound very good!

turbo spooling at 4200 could also have to do with the head porting and cam profile(?) as it was expected to be sooner than that?

No, this is a very good spool time for a 3076/0.82 with high lift cams.
I thought it would come in later than that...

This engine would benefit from a slightly larger turbo though, a GT35R... it would then easily make more than 700hp. This is because it really starts to breathe at about 4800 rpm with these cams.
Though I don't know then what the car could be used for, it is already pretty silly right now and barely streetable with this amount of power.

[A80Avant]

ah i thought you used the comp turbo instead!

3076 0.82 should be fine at those rpms!

[prj]

8.0:1 CR
Cylinder head by PKM
Crankshaft by PKM
Pauter rods
Custom pistons by PKM
Dahlback IM
Dahlback DV
Repo EM
3076/0.82
630cc Dekas
4 bar FPR
FMIC...
01E gearbox
Lightened (a lot) flywheel
Spec Stage 3+ clutch allegedly, but it is completely on/off

Engine management:
RS4 MAF conversion
4 bar MAP sensor
Mapping

I will give a log later, have to go out and tune the cold start and then map the Coupe.

[Billman]

8.0:1 CR
Cylinder head by PKM
Crankshaft by PKM
Pauter rods
Custom pistons by PKM
Dahlback IM
Dahlback DV
Repo EM
3076/0.82
630cc Dekas
4 bar FPR
FMIC...
01E gearbox
Lightened (a lot) flywheel
Spec Stage 3+ clutch allegedly, but it is completely on/off

Engine management:
RS4 MAF conversion
4 bar MAP sensor
Mapping

I will give a log later, have to go out and tune the cold start and then map the Coupe.

Cool!

What coupe???

[A80Avant]

Rocco has a coupe as well

interesting though that the 3076 can produce that amount of power given the right engine changes, although it is rated at 525hp.

[Thuppu]

Interesting. How radical was the head porting, and what cam setup?

[Thuppu]

This car is a wreck...
* Many hoses were put on pretty bad, blew them off like 5-6 times.
* Too thick clamps and too short hoses in some places.
* The throttle doesn't shut fully after opening, making the thing idle like sh*t, need a stiffer spring in there...
* The oil catch is into a bottle which sprays through the entire engine bay
* Alignment is off
* Strong vibration over 140kph
* Alternator belt broke
* Dash not working (4 cyl dash)
* Oil pressure gauge/sensor broken
* Lights were pointing to the sky
* All the connectors and cabling are like a ratsnest in the engine bay, everything needs to be tidied up
* The car was draining the battery, traced it to a lambda
* The suspension is very soft, bushes need changing for sure
* Airbag light is on all the time
* There was a million boost leaks, injector inserts, etc
* The MAF on suction side was connected very badly with lots of air leaking everywhere.
* There is an oil leak from the pressure sensor
* The clutch makes noise when engaging
* The car makes a noise when turning left
* 2nd gear pops out every now and then, 6th gear is very hard to get into, due to the linkage.
* The fuel pump was not relayed, so the fuel pressure was tapering
* The EVAP is connected into the heating system somehow, so if you put the heat on the car is full of gasoline fumes.
* And finally, I got stopped by the police twice in 2 days working on this damn thing. Luckily both times the car was stopped quietly, so no fines...

So as you can see, lots to do with the car...

Are you sure this wasn't my car?

[Rocco]

Hey guys! I have slepta average of 5 hours a day these last 5 days.
Too much work,too much fixing problems,too much luck as welll with the police ,and too much luck to have a race engine .


I would like to try a 480 HP car....because mine like it is now it seems too much powerful for the streets.

Camshafts are 10.5 lift ones afaik,as Peter kowats told me.
Stage 3 cylinder head,mechanical. 70 mm thorttle body also and big IC.

Guys ,I was really scared doing WOT in larguer gears,also in third.

I will have to install semi slick tires ,a very good suspension and bush the full chassis.

The car is already aligned. Tyres are 235/35/19 Goodyear eagle f1 asimetrics.

Got the Aquamist ready but...100 HP more must be too dangerous .

The car has more or less the same lagg as the coupe with stock head and k26/27... There is. Not possible comparison later.