YEY! more power on the way!

[ben_p]

Just orderd a set of woosners 12:6 pistons for the clio

Went for standard size with total steel rings, getting the block decked and honed by Headshop UK, need to find some tri-metal or copper/lead bearings and new mains.

The head already has headwork so I think I will leave that at that, but now im itching to change the cams to 422s to make it to the late 230's early 240s.. but i will also need new valve springs from CAT

Then im thinking of 120mm trumpets to replace the 90s! lol, but that comes with its own clearance/fitting problems!

Roll on the rebuild!

Just need to order a new headgasket, cambelt kit and ARP 2000 for the bigends from k-tec!

 

[Ali]

Why do these give you more power...??

We used to run teflon pistons in the karts but i never really understood the purpose.

 

[JD]

big end - tee hee

when do i get a look? ast's should be along this week, fancy a bacon butty

jamie

 

[ben_p]

Why do these give you more power...??

We used to run teflon pistons in the karts but i never really understood the purpose.

Increased compression - more bang etc.

I think for every 1CR you get about 3% increase (as a guide)

Not sure on torque increase,

 

[ben_p]

big end - tee hee

when do i get a look? ast's should be along this week, fancy a bacon butty

jamie

Yeah anytime bud, away this weekend though!

 

[Ali]

interesting. Look forward to seeing her run.

 

[Keith185]

Lots of room there for some high lift cams :approve:

Very nice

 

[ben_p]

Lots of room there for some high lift cams :approve:

Very nice

Just in the process of getting some 421s/422s

Already have 428

 

[Rossy197]

Pistons look the danglies fella

 

[ben_p]

Cheers, can't wait to get it built!

 

[.GAZ.]

will be a shed..

 

[ditz]

selling the 428??

 

[Dave Hester]

ben are you a lottery winner?

 

[ben_p]

Me, I wish!

Ditz, they may be sold but I'll let u know if not

 

[ditz]

ok mate give me a message soon as you know,, cheers

 

[ben_p]

will do

 

[hissingsid]

sounds similar to my build. why are you decking the head ben?

 

[ben_p]

The head isn't getting decked/skimmed

Its just the block that is

 

[hissingsid]

The head isn't getting decked/skimmed

Its just the block that is

Sorry I mean block

 

[ben_p]

?

 

[Hutchie]

that only causes problems iirc
3 retirements in a row, with decked block

 

[hissingsid]

Is it to raise the compresion higher or is it because you are using steel conrods that are are shorter.

 

[ben_p]

No, it's just if it needs doing I'll get it done, how does it affect the engine (failure rate)

 

[Hutchie]

No, it's just if it needs doing I'll get it done, how does it affect the engine (failure rate)

just leave it FFS

 

[ben_p]

Flol

 

[hissingsid]

I think basically the iron filings blocked an oil way that we could not kleen just bad luck really all it did was restrict the oil to 1 of the main bearings

 

[FlameR]

I'll buy the 172 off you when you get bored of it again for like a £15k loss

 

[sideways danny]

Only deck the block if it's not flat. removing material will raise comp more, but the pistons will sit proud of the block, and with 422s that will get you worryingly close to valve contact.

 

[ben_p]

Ahhh, I see.

I'll just see what the machine shop says, I don't want to create work etc, just want it to be right and a few people have mentioned it to me!

 

[ben_p]

Only deck the block if it's not flat. removing material will raise comp more, but the pistons will sit proud of the block, and with 422s that will get you worryingly close to valve contact.

I don't think I can get 422s anymore, I've got a set of 421s here which I'm looking at fitting!

 

[Hutchie]

I don't think I can get 422s anymore, I've got a set of 421s here which I'm looking at fitting!

i know where there is a set

 

[sideways danny]

not much point going high comp IMO if you dont run cam profiles that match the bottom end spec. I'm not even keen on 421s in a stock engine TBH, they're not s**t, but 428s work better IMO

 

[Mark One]

12.6:1 is a naughty ratio

Vids will be necessary

 

[ben_p]

not much point going high comp IMO if you dont run cam profiles that match the bottom end spec. I'm not even keen on 421s in a stock engine TBH, they're not s**t, but 428s work better IMO

The 421s are better than the 428s if I'm running high comp though, no?

 

[Hutchie]

12.6:1 is a naughty ratio

Vids will be necessary

iirc they do some closer to 13:1

 

[ben_p]

iirc they do some closer to 13:1

There the maxi's but you need forged rods with 21mm small ends to run them

 

[sideways danny]

The 421s are better than the 428s if I'm running high comp though, no?

422s are tried and tested and work the magic TBH, so that's what we spec

 

[hissingsid]

I'm trying 550551 next just to be different

 

[stan*]

Theres nothing wrong with decking the block to tighten up the squish clearance...works nicely, esp if you clean the block properly!
Of course, you need to have a proper measure up to determine what you are playing with, no point in just handing a bare block to a machine shop and saying deck this will you!

Theres also nowt wrong with steel backed aluminium bearings, though i think ive got some tri-metal's kicking about if you specifically want them.

 

[ben_p]

Ill take the whole lot to Headshop UK and ask them to do what it needs lol