Author Topic: What size can a 8v k-jet be bored out to?  (Read 1289 times)

Offline MK4_20VT

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What size can a 8v k-jet be bored out to?
« on: 06 June 2005, 06:33 »
I'm looking to re-bore my 8v or dump a 16v into my mk2.

1.  Is it a pain in the ...... to put a 16v into a early k-jet 8v e.g matching up fuel lines etc

2.  Has anyone got a 2.0l 8v here? (cannot get the search engine to work) whats the power, fuel econ like??

3.  Can the 8v be bored to 2.0l??

Thanks for looking
                           Jay

Offline ...joe

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Re: What size can a 8v k-jet be bored out to?
« Reply #1 on: 06 June 2005, 21:23 »
1. not sure
2. if they have its probably a mk3, although jimbo might have one in his mk2
3. you can bore them out to 83.5mm i believe and then you have to use a longer throw crank to get the 2ltrs 95.5mm i think. when i bored mine i was advised to go to 1900, 1940 maximum and to not bother with a longer crank, so now its a 1900. still running it in but so far feels great!
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Offline MK4_20VT

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Re: What size can a 8v k-jet be bored out to?
« Reply #2 on: 06 June 2005, 21:44 »
What power is you 1900 putting out bud??  I prob will go for the rebore to 1900, do you notice the improvement in power alot??

Ps where did you get your front grille from I WANT I WANT,  as it's the best I'v seen by far  :evil:

Offline ...joe

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Re: What size can a 8v k-jet be bored out to?
« Reply #3 on: 06 June 2005, 21:47 »
not sure on power yet but been quoted around the 150 mark which would be nice, i'm going to let it free up a bit then get it rolling road tuned to see what its putting out....

.... as for the grill, i made it. at stonor at the weekend i had soooo many people asking where i got it i'm thinking of making more and selling them on!
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Offline MK4_20VT

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Re: What size can a 8v k-jet be bored out to?
« Reply #4 on: 06 June 2005, 22:00 »
Around 150 eh, that is v-nice increase from a 112, what cam are you running in it, a 285 road/rally cam??

And about making another grille & selling them, PLEASE DO..  or tell me how you made it  :wink: as I have an idea how it's done.

How much did the work cost for the rebore & replacements parts e.g. oil pump

Offline ...joe

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Re: What size can a 8v k-jet be bored out to?
« Reply #5 on: 06 June 2005, 22:28 »
yeah i hope its somewhere around that and yeah its a piper 285 cam, i had the head done and the manifolds ported to match a corrado milltek downpipe.

i could make some more, we'll see...... i quite like the fact that no-one else has got one but they are simple enough to make but quite tricky to get looking good.

i was lucky with regards to cost, i knew a guy who bored it for free, but a re-bore should cost about £100 with the vat. the pistons would be about £300, maybe more. have a look at TSR's website as they list a kit which works out about £500+ for the bits to do it. i didn't change my oil pump, not sure if i should've? no-one mentioned it during the whole process but i renewed all the bearings seals etc. didn't seem worth doing half a job.
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Offline MK4_20VT

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Re: What size can a 8v k-jet be bored out to?
« Reply #6 on: 06 June 2005, 22:54 »
Cool, thanks for all the info joe, whats the full web address for TSR so I can start to price up the rebore?