K4 & KV6 Head / Main studs

[Drew]

ok so limited crowd for this maybe but im having some studs/nuts made up for the head and mains on my kv6.

they are a bigger diam so its not a simple job.

ive also sent a K4 head stud to be looked at. again bigger diam, hopefully the turbo boys will be interested in them.

tbh looking for a group buy to get my own studs cheaper, but It may benefit some others too!
anyone interested in a set, give us a shout.

cheers
Drew

[stefaclese]

How much are we talking here? Any modifications required for these to fit?

[Drew]

Hi Drew,

By bigger diameter are we talking machining to the whole head/block or just a redrill of the ladder.
Are you sure of their benefit, I don't really think I would need them I don't expect to run much north of 1 bar but it depends on how much they cost.

for the K4, there are some dowels in the crank ladder that may need opening up and depending on the size, the bottom plate that the bolts go into may need to be re-made.

as for cost I got a quote for a few K4 bolts at £15.8 each, + nut £2.6 + washer £1.5. that may be +vat. so £20-£24each x10!

ive asked for some prices on larger orders so hopefully become a little cheaper. still much better than ARP.

as for really needing them..

Drew

[djwilma]

Drew post this up on metropower as they have the most turbo k's

also explain whats involved in fitting them machining wise

may take a set, undecided whether I should go k4 turbo or kv6 in the mini

[stefaclese]

So will these still "stretch" as per the OE bolts?

[Drew]

no they wont stretch. and they have a better clamp due to being a stud not a bolt.

got a new price today. if I order just one set of K4 head studs (10 off), they drop to £11.29 per stud, nuts and washers stay the same as they are bought in.

so £153.90, im going with +vat on that, £184.68 and plus delivery to your door.

that's a one off set of head studs!

2 sets that's down to £9.94 per stud, £140.40+vat for a set.

if people are not interested in uprated diameter and machining I can get a price for the std (M9) like the ARP's are?

Drew

[ChrisD]

I think I'd be happier with the original diameter tbh, I don't fancy having to mess around that much. What did you do on your 1.4 turbo std diameter or enlarged, what boost did that run and did it have any headbolt issues.

[djwilma]

I think I'd be happier with the original diameter tbh, I don't fancy having to mess around that much. What did you do on your 1.4 turbo std diameter or enlarged, what boost did that run and did it have any headbolt issues.

Drew will let you know the diameter and it was and still is running 25psi

And no head bolt issues, only one HGF on MLS gasket after 10k and a few track days

[Drew]

they were bigger, I think 10mm. had to drill the crank ladder and thread the lower rail for the bigger studs.

I think Dylan pushed 24psi through it. mls did fail in the end, but it was 5 years after I built it. replaced with an elastomer gasket, re-used the studs runs (from what I know) perfectly well.

Drew

[ChrisD]

Ok well, I'm putting myself down for a maybe for standard size studs, will see how interest pans out.

[stuballs]

I'd be interested in a set of standard diameter for k4. I don't want to have to modify the crank ladder or oil rail.

Would you torque these down more than the stretch bolts? Presume yes if they offer greater clamping? I'm only planning on running max 16psi (at first anyway) so might not actually need them but will be nice to have them especially if only limited numbers are made. Just in case I go up to 20psi plus!

[stuballs]

I'd be interested in a set of standard diameter for k4. I don't want to have to modify the crank ladder or oil rail.

Would you torque these down more than the stretch bolts? Presume yes if they offer greater clamping? I'm only planning on running max 16psi (at first anyway) so might not actually need them but will be nice to have them especially if only limited numbers are made. Just in case I go up to 20psi plus!

[Drew]

ARP's say 50lb/ft I think I went higher on mine.

Drew

[quick_spider]

Would be interested in a set of standard diameter, although I'm tempted by the oversize ones!

[Drew]

so the company has made K series bolts before.

they say the last builder spec'd them as 9mm but waisted the stem section to keep the stretch as the engine heats up.

one set, £10.28 each, £102.80 set of 10 studs

2 sets, £8.93 each, £89.30 set of studs

£2.60 per nut + £1.50 per washer, £41 set.

+vat, +delivery.

Drew

[ChrisD]

OK that seems worth a punt, I'm in. Post up when your about to order and I'll send some money your way.

Thanks
Chris

[Drew]

just been looking around my kv6, think im going to go with the bigger mains for mine and probably the std diam for the head studs. doesn't quite look like there is enough space to tap the block any bigger.

Drew

[JRMVVC]

Hi Drew

Interested in these,was advised by Dave Andrews a while back to look into larger diameter stud work. Do you think the K4 can take 10mm stud work??

Not too worried about any tap work etc, scholar are only down the road & can sort that out pretty easy.

Are they going to be made by Northbridge Motorsport (Pankl Engineering) if so they will definitely be better than ARP's.

Cheers
Johnny

[Drew]

ive used a 10mm stud on an engine I built, was very easy even with a basic pillar drill. my lower oil rail was the older style and still took the 10mm stud. id look at the newer landrover style rail which has more meat on it.

its T&K Precision, http://www.tkprecision.com/intro.htm

I think ill order some kv6 ones for myself and see what the delivery date / quality is like.

cheers
Drew