*BREAKING* James Judd's Forged 1.9 Mk3 Ibiza HTA GT2868R Build *BREAKING*

[James.Judd.1]

Well make yourself something to do!

The compression ratio is how much it squeezes the air and fuel on the compression stroke of the engine. The denser the mix the bigger the bang.

The way to increase or decrease the CR is to alter the volume of the combustion chamber (the combined volume of dish in the head and the dish in the pistons)
You can also alter compression by changing the stroke ect.

A simple explanation is say there 300ml of air in the cylinder at the bottom of the stroke and it then compresses that to 30ml at the top that would give you a 10:1 CR.

The general rule is the higher the compression the more power you make, but on turbocharged cars it's a good idea to drop the compression as way more air is getting forced into the cylinder than a n/a car.

 

[fourtwofive]

Thanks James I understand the ratios now cheers for explaining. I found a job to do my clutch is slipping lol

 

[PhilW]

Who's mapping the car when its back up and running James?

 

[James.Judd.1]

Who's mapping the car when its back up and running James?

Thats the million dollar question Phil.
Im really interested in maestro eurodyne custom software.

Its all money dependant as it will only cost me £100 to upgrade to Alex's old map..

 

[James.Judd.1]

Im holding back buying injectors and sorting out the MAF untill I decide

 

[peter_cupra197]

never get bored of reading this love the fact i can just pop round the corner and get all the updates too

 

[James.Judd.1]

Hot off the press ay Pete!
Nothing very interesting is happening at the mo, just a load of parts scattered in 100's of different places lol

 

[joehirth]

I'm mapping it for him

 

[PhilW]

I'm mapping it for him

Hows yours running now Joe? Missing your project diary.

 

[joehirth]

Mine's great, not using it as much as I used to as it's costing me too much to get into work lol. I'm missing it too - mOrk can't find it after it was deleted

 

[PhilW]

What did it make after on a tweaked map? Running all good now by the sounds of it.

 

[joehirth]

Need to get back on the rollers really, Surrey RR are good but don't measure coast down so flywheel figures seem lower, expected 350 on those rollers, with ones which measure coast down losses looking more like 370-380. I could do things like pump up the tyres to give me extra bhp on places which apply a uniform % across the rev range for losses.

I am still enjoying it though.

 

[James.Judd.1]

Get your own Thread!

 

[joehirth]

Sorry mate - have to share yours.

 

[PhilW]

What dyno and what whp figure did you get?

 

[joehirth]

What dyno and what whp figure did you get?

I think it was around 300whp but that was at 1.6-1.7 bar. The actuator was leaking so lambda regulation was probably out too. As far as I'm concerned those figures and null and void. Now the actuator is fixed I will jump back on those rollers to get myself a bench mark.

Dyno is Dyno Dynamic, the place is very highly regarded but you have to read between the lines with these things.

Just to annoy James I'll post my results on his thread hahahaha !!

 

[James.Judd.1]

And you will wake up with one testicle the next day!

Can you please start a new thread mate as I want to keep this soley about my whip.

 

[denzil691]

After measuring my ADR cams and realizing they were standard turbo cams I went on the hunt for some N/A AGN cams..

Turbo cams:
Inlet- 7,67mm lift,
Exhaust- BAM 9,3mm lift,

N/A AGN cams:
Inlet- 8,41mm lift,
Exhaust- 10,4mm lift,

Brilliant thread mate shes gonna be a animal once finished, i thought about cams for mine but not sure if it will make a big difference are you doing everything possible to squeeze all the ponies out lol

 

[James.Judd.1]

Thats the plan mate.
I very much doubt you will see much gains if any atall on a k03.. who knows though! There not very expensive so its well worth a try, if not just remove them and sell them on.

 

[James.Judd.1]

And out she comes again..

engine is fully stripped now just awaiting some boregauges and micrometers to arrive to get checking these tolerances.