A4 1.8 TQM 1998.5 Volcano Black

Fully Rebuilt engine consisting of:
JE Pistons & Rings, HPC Coated sides and Crown.
De-comped to 9.3:1
APR Stage 4 Chrome Moly Rods
ARP 2000 Rod Bolts
Eddy Woods Ported Head.
HPC Coated Chambers and Exhaust ports.
Stock Valves with HPC coated chamber Faces.
Schrick Cams
Stock Bearings.
Fully Balanced to 0.5grams + Flywheel and Clutch.
APR Aluminium Flywheel and Twin Plate Clutch.
EGR system disabled and Oil Catch Tank.
Custom Made equal Length Tubular Exhaust Manifold.
+ Manifold HPC Coated.
Inlet Manifold Blended to Match Inlet Ports.
Ray Hall Hybrid GT25/35 Turbo.
3" Turbo Back Exhaust with no Cat.
Custom ECU Software.
Stock Air Box with a extra hole cut.
Greed Speed FMIC.

Rest Of Car.
AP Racing 4 Pot Calipers.
328mm Rotors
Stock rear Brake setup.
AZK (Oz Wheels) 17"x8" Super Turismo wheels.
Tinted side markers & rear Tail Lights.
GreedSpeed/Nuspeed Under Chassis Brace.
AZK (Eibach) Springs 50mm drop.
Koni Sport Shocks (Custom Valved)
S4 Front Bumper.
Xenon Filled Globes ($15 pair, no failed ones yet).
Aluminium Shift **** (This really makes your car Faster!)
UUC Short Shifter
+ No Money in bank.

Waiting to arrive...
Carbon Fibre Hood.

Wish List:
Strong Gear Box with Quaife Diff.
Quaife rear Diff.
May be Larger Fuel Pump (Hi Ned!)

Never will be on the Car:
Hot Blonde....Wife will Kill me, she is close to it now!
Car Bra!
Multi-Coloured Wipers and Mud Flaps.
20" Exhaust Tip.
Pokemon critters.
Rally Art Stickers
2Ft High rear Spoiler

 

Hey, is that all, Lucas? What about the VTEC stickers? ;-)

 

Anyone else notice that the displacement on the Audiworld model guide is off quite a bit.

 

How does the car drive on the street? How is the lag?

 

The Stroke is still identical.

Engine Capacity No Cyl x Pi X (Bore radius)^2 x Stroke length.

On a stock Audi this give about 1.7808 L or 108.67Ci

On My Car I have 20" over bore
So I have 1.8029L or 110 Ci.

Compression Ratio does not figure in.
That is only a measure of Capacity Of Closed system with Piston at BDC Vs TDC.

 

and how much did it all cost?

 

volume is decreased, then CR ratio also goes down. But what confuses me is that some people calculate overall volume using the swept volume, and TDC volume. Audi numbers seem to be swept volume only hmmm. Oh well, just having fun with numbers. Looks like you meant 0.020" also. Looks like your set up is good for 400hp (ok, that was a guestimate ;P

 

Hight of piston is irrelevant.
2 items only can affect Capacity of engine.
1. Bore size. (This is by physical bore in Block)
2. Stroke Length. (This is governed by Crank throw)
Nothing todo with Pistons or Rods.
Height Of Pistion can be say 40" Higher than stock, This still has not Changed Capacity displacement of Engine.
as at BDC, it is also 40" Higher, The over all stroke is exactly the Same...

With Over bore, your compression goes up!
As you are increasing the Volume of Cylinder, But combustion Chamber remained the same volume, so you are compressing more volume into chamber.
So when you over bore, to keep the same CR, four items you can do..
1. Increase Combustion Chamber Volume.
2. Use a shorter Con Rod
3. Use or make a lower Piston.
4. Use a Thicker Head Gasket.

All Engines are measured in Swept Volume, ie Cubic Displacement.
The never include Combustion Chamber Volume.
Head Gasket Volume or even Deck Height.
But Given Displacement (BorexStroke) and CR, most other values can be calculated..

 

Sorry i forgot about the fuel pump i have been busy.

I will speak to someone this week. Promise!

Ned

 

(thanks for pointing out to me proper terminology as that's what I called TDC volume because I can't remember, aahh, nevermind)
anyway, the chamber volume decreases, and compression goes down.

But looks like we are on the same page anyway as you summarized on your last paragraph - other than the fact I recall seeing some tech books calculating displacement with every volume inside the chamber.

Thanks for info, I'll use swept volume always from now on