right,seriously . im struggling to find a 9a. ill be building an engine with forged pistons/rods/crank and other bits too... can i just use/bore my kr block instead of a 9a and still use these parts? any problems with this? cheers Edited by: riley
Riley, if I understand right, are you trying to get a 9A simply because you want to use those high CR pistons from that supplier? As an alternative, could you not get some pistons made to your own specification, to fit whatever block you want, e.g. KR bored to 1.9? I can't remember how much those pistons are right there but they're about 600 / 700 $ right? I could get some custom JE pistons via JRC in the US for less than that. Like $425 plus about $100 shipping. Just a thought. There could be something about these pistons that's particularly special... I only have a basic grasp of these things. Edited by: Trev16v
i know v little my self trev always tring to learn though. just that,thats the only site ive found with vw specific parts listed so far... who are jrc? that sounds bloody cheap! cheers. ps:yep the forged ones above are $690-386. Edited by: riley
Well JRC Motorsports in the US are a company that can get hold of some custom JE pistons for you, to your specifications. I've just dug out the notes I took when I phoned them up a few months back. Sorry, I got it wrong: for a set of four pistons, I was told $565, plus about $120 shipping. These are complete with rings, I think. The number for JRC in the US is 1 704 864 1995. Buy yourself a cheap 5 US call card and you can phone US numbers for hours...! I suspect (and I hope) that someone else on here can suggest alternative piston suppliers, maybe even some custom piston suppliers in Europe who are worth taking a look at. The maximum you can re-bore a KR is just above 1.9 apparently. I was going through the PVW adverts the other night and I am sure I came across Voodoo (I think?) Motorsports who were advertising some toughened KR rods in the parts section in the Classifieds. I think they've got some pistons, too - not sure what though.
cheers! info written down yeah i think you can go up to 1900ish cc with boring then anything upto 2.1 with longer stroke cranks... but will all this be ok with the kr lump? so for the je pistons shipped over its 383 quid! not bad eh! decided what your doing with yours yet? Edited by: riley
Well, when I ordered the 16V G60 kit from BBM, I bought a $99 copper spacer gasket from them as well. I think I'll try and get the thing running with that on my standard KR first. I shall have to measure it up and calculate exactly what CR it'll give me. Then, I'll hopefully work out what CR I ideally need based upon my experiences with that, and get some custom pistons later on. I think I will either stick with my KR block, or possibly get a G60 block instead, because I understand that these are quite stronger. I suppose I shall get either block bored out to whatever is the largest you can go - 1.9 or whatever. If that makes sense. Like I said, still trying to get a grasp of these things and will need a lot of advice I think Let us know what you eventually decide to do. Edited by: Trev16v
ahhh sounds good so the spacer gasket would lower the c/r? would be good to stay 16v g60,or would it? i dont have a fekin clue with chargers and turbo's ive just thought,the kr has the oil squirters in the block,are these affected when boring/using the bits above? Edited by: riley
If you use a 9a rather than a bored out KR you get to keep the piston oil jets.. Gotta be a good thing.
Woah, I never realised that you lost the oil jets if you bore out a KR. I understand that these jets are fitted to the big end caps so why would you lose them if you bored out the KR block?
They are fitted into the block not the big ends, i presume you must have to block them off when you go 2.1 and I presume it is because of the crank clearance, not because of the bore size. What crank/piston combo do you use for a 2.1? Or is it just and overbored 2.0?
For the amount you are spending on Parts why not buy a new 9A short block from VAG , they are 700 notes including VAT with clubgti discount. You will need a exhange unit however, or there is a 500 notes surcharge I have a OLD 9A knocking around that had a worn bore so therefore is scrap as far as i am concerned
duff,you say buy a 9a rather than bore the kr? the kr i have is a good strong lump,the bores and tolerances were great when i re-ringed the pistons... cheers for the responses everyone. i dont think the most "knowledgeable"(sp?) on the forum have contributed though.
No, you can join in. Just talk gibberish and randomly throw in the words 'piston', 'block', and especially lots of 'bore'. That's what I do
hsadajhsaasjhfjk PISTON fdjfsdjkfsdhfj CRANK jhgjkfghkjhkjsfdhhfj BORE gbfsdhj BOREjkdfhgkjfdghskdf CRANK sdjfgk dvfdh BIG BORE!!! How am I doin'?? * Hi-jack over * Edited by: ValverPaul
13.1:1 is DAMN high! even running on optimax detting is gunna be a problem. id use a ABF block mate, the rod to throw ratio is better and make it rev much nicer. maybe 83.5mm bore on a ABF 92.8mm crank running 11.5:1 CR JE pistons and Pauter rods. Oh and save for a mech head.
Buy Duff's worn 9A and have it bored to the maximum stated overbore, far cheaper than trying to get a KR near 2l. You can get the fancy pistons and all for a 9A if you need, tho I wouldn't bother with the fancy rods......
