Official Displacement Increasing Thread

[kovalevandrew]

Sweet man. Should be on my way home soon, weather permitting. Been a damn rough week. I have lots to do this weekend.

Want to go and get 2 new engine stands tomorrow morning, and a bunch of other arb tools and cleaning stuff and heavy duty latex gloves and overalls etc. Want to also try and find a VERY large steel tub so i can soak various parts to get all the greasy sludge off.

I bought a Honda H22a motor for my old Honda Civic EG, hoping to pick it up tomorrow. Want to start work on that as well.

Same guys organised me a different large port head for my Audi build. I want to try my best to get that motor out tomorrow so i can soak all the necessary bits and drop them off for work needing to be done on Monday before i fly out again.

Lots and lots to do!

[317ssayzarc]

Different large port head? What the engine code?

[leon]

@317ssayzarc: i dont see a crank pic on the first page...?

[317ssayzarc]

Sorry Leon, here you go:

[leon]

Thanks!!

[Daetelos]

So what's everyone using for ECUs / tuning on their strokers?

[317ssayzarc]

Tried the "best chip tune" if there is such a thing for narrowband 02 cars... Tapp..

I'm now on standalone, since I actually wanted to make power with my setup

[leon]

Why stand alone? Dont you guys have custom tuning in the states?

[317ssayzarc]

Yes but I didn't want to have to pay a grand (Tapp file + Chris's charge for tweaking it) for a stupid chip tune... I paid a little more and have the ultimate flexibility

[mike-2ptzero]

Why stand alone? Dont you guys have custom tuning in the states?

Yes but at this level its not that great to go with because if you end up making slight changes you have to have them custom tune it all over again. With the stand alone the owner of the car can make slight tuning adjustments on their own.

[jrock]

What do you guys soak your engine parts in to clean/degrease em?

[a4mafia(Red)]

this thread is amazing!

EDIT: i originally posted a question on here but found my own answer after like a month of searching. but thank you

[SmellMyFace18t]

just want to make sure i have this right(after reading this whole thread) before i buy a head....an AEB big port head will fit on any block, mostly for me an ATW block with no problem.

Just trying to educate myself as much as possible. THANKS

[mike-2ptzero]

just want to make sure i have this right(after reading this whole thread) before i buy a head....an AEB big port head will fit on any block, mostly for me an ATW block with no problem.

Just trying to educate myself as much as possible. THANKS

Yes. I have been running a AEB head on my ATW block for 6 years problem free.

[4rings4me]

I have a question,when using the ABA crank is the correct pilot bearing going to be able to be installed or is there some other option. I read this a couple of times and I saw no mention of this. I know the auto and 5spd cranks in the b5 are differant I was just wondering about the use of the ABA and AEG and mating them to either trannys.

[t1demont1]

ABA trigger wheel bolts up fine for us. Unless your talking about stroking an auto?

[4rings4me]

No I am asking about the pilot bearing for the transmission,will the right bearing go into an ABA crank for a 5spd?Sorry after I reread it it doesn't make much sense does it I hope this is a little more clear.

[mike-2ptzero]

Pretty sure its the same seeing that the 1.8t flywheel bolts right to the ABA crank. So the spot for the pilot bearing should be the same on the cranks.

[billybravo]

hello im getting ideas on my engine build

do you have more specs on the custom pistons to use with the 92.8 crank im concerned about the deck height but i cant find what the specs should be.

im also in the uk so more details for engines where i can find the right crank will be great.

ive found these
http://www.performanceenginecomponen...uct.asp?id=224

these piston are for use in the 2.0ltr FSI Turbo but could these work on a 058 block i want to get close to 2033cc if not does anybody have the specs or part numbers of any Wössner pistons that will fit

83.5mm bore x 92.8mm stroke = 2033cc

can a rebore be safe taking the walls upto 83.5mm and last of all where can i sorce the uprated head gasket.

Part No. 9213DA
Engine typ AXX
OE Bore size 82.5
Bore sizes available 82.5mm / 83mm / 83.5mm
Engine CC 1984.29cc / 2008.42cc / 2032.69cc
Stroke 92.8
Wössner Comp. ratio 9.2:1
OE Comp. ratio 10.5:1
Comp. height 29.5
Valve per Cylinder 4
Cylinders 4
Reccomended Piston to bore clearance 0.08


thanks for your time

Craig

[onemoremile]

What do you guys soak your engine parts in to clean/degrease em?

Oil Eater, Simple Green, Dawn dish soap, etc.
Use light scotchbrite and be gentle on coated areas. Some folks polish the piston tops to prevent heat stress areas (detonation prone areas) and to make it harder for carbon deposits to stick.

[blackedoutaudi]

How does compression ratio figure into all of this?

when he was asking about how does compression ratio fall into all of this,i think he means you have your basic formula to come up with the cc size of your motor...but if you have lower compression pistons or high compression pistons,this would change the overall cc size of your motor...example: it you had 82.5mm bore,and 92.8mm stroke,you would have 1985cc size...but if u have lower compression pistons with a dish,that will increase the cc size of your motor.you would have to get the pistons cc'd and add that to the equation..also,our heads are hemi heads...if you got your combustion chambers of your head cc'd also and added that to the equation too,you would realize you have more cc's then just factoring the bore and stroke equation....

[Issam@INA]

these piston are for use in the 2.0ltr FSI Turbo but could these work on a 058 block i want to get close to 2033cc if not does anybody have the specs or part numbers of any Wössner pistons that will fit

Craig,
those FSI pistons are the correct compression height but they will not work with your cylinder head (well they will but it is not what you want)


These are what you want :

http://www.034motorsport.com/product...ducts_id=18924

I can offer them to you as a 1 time offer of $579 USD
send me a PM for further details
Cheers.

[onemoremile]

when he was asking about how does compression ratio fall into all of this,i think he means you have your basic formula to come up with the cc size of your motor...but if you have lower compression pistons or high compression pistons,this would change the overall cc size of your motor...example: it you had 82.5mm bore,and 92.8mm stroke,you would have 1985cc size...but if u have lower compression pistons with a dish,that will increase the cc size of your motor.you would have to get the pistons cc'd and add that to the equation..also,our heads are hemi heads...if you got your combustion chambers of your head cc'd also and added that to the equation too,you would realize you have more cc's then just factoring the bore and stroke equation....

Um, no.

Bore and stroke determine displacement. It doesn't matter what the shape of the piston is. You could take a piston to a bandsaw and cut the face off at the top ring land and it wouldn't change the displacement. It is still the same diameter and still moves through the same stroke. Same goes with relocating the piston pin.

Dish will increase the size of the combustion chamber which is why it lowers compression but it will not change the displacement. Combustion chamber volume isn't added to displacement because it has nothing to do with it. Again, it has to do with combustion chamber volume but displacement is area and distance only. If you took the head off your engine and rotated the crank with a wrench you'll see that your displacement is still the same as it always was.

[blackedoutaudi]

Craig,
those FSI pistons are the correct compression height but they will not work with your cylinder head (well they will but it is not what you want)


These are what you want :

http://www.034motorsport.com/product...ducts_id=18924

I can offer them to you as a 1 time offer of $579 USD
send me a PM for further details
Cheers.

craig,make sure you get the right compression pistons for your application.9:1 will be fine if dont plan on running too much boost.but if you are going to go crazy with the boost,i would suggest 8.5:1 or even 8:1 compression...wiseco makes some great high density turbo pistons in any compression ratio for $495...id look into those if you are going to really boost the hell out of your car...just thought id share a little knowledge for a fellow 1.8t owner..
cheers

[blackedoutaudi]

Um, no.

Bore and stroke determine displacement. It doesn't matter what the shape of the piston is. You could take a piston to a bandsaw and cut the face off at the top ring land and it wouldn't change the displacement. It is still the same diameter and still moves through the same stroke. Same goes with relocating the piston pin.

Dish will increase the size of the combustion chamber which is why it lowers compression but it will not change the displacement. Combustion chamber volume isn't added to displacement because it has nothing to do with it. Again, it has to do with combustion chamber volume but displacement is area and distance only. If you took the head off your engine and rotated the crank with a wrench you'll see that your displacement is still the same as it always was.

displacement must sometimes be defined as the total volume of air/fuel mixture an engine draws in during one complete engine cycle...with dished pistons,you will increase the volume,no? more volume,means that same bore and stroke will displace more volume....domed pistons for higher compression applications will decrease the volume,no?which means that same bore and stroke will have less volume to displace...i understand the bore and stroke theory,but i do not agree with it at all...and with all that being said,it really doesnt matter what size your engine is,all that matters at the end of the day is how fast your car runs....

[onemoremile]

Displacement has to do with nothing more than the bore and stroke. Everything else is irrelevant. It is not a theory, it is a definition.

Changing the size and shape of the piston top or head bowl will change compression and the way the fuel mixture burns but it cannot change displacement. Pressurizing the intake charge (turbo or supercharger) will increase the volume of air per revolution but it cannot change displacement.

[b5v6]

is there a difference between an ABA crank from an auto transmission or a manual transmission? oh, and is there a part number for this? search aint helping.

[A4DRIVR]

I believe the ABA crank (as with most factory crank shafts)... if it's for Manual, the end will be bored for the use of a needle bearing, and if it's for an automatic, it won't be bored at all.

You can have a machine shop add the bore if you get your hads on an auto crank though...

[Sline18T]

I just bought a AEG crank, is there any way to check that it is a AEG crank? like measure it some how or check for any part numbers on it?

[b5v6]

does 81.5mm bore require a larger bore head gasket?