Yes I'm day dreamining, but hey whats the harm?

There are two routes I see, buy a high boost 1.1 and transfer the turbo over, or low boost the 1.2 and then turn that to high boost.

Which would work best?

And what exactly is the difference?

a high boost setup requires a lower compression ratio. you'll need ideally custom low comp pistons to acheive that. a copper HG spacer could be used, buit not the ebst way to go about it.

first you gotta find a 1.1 hb turbo. but it`d probably be easier to get a lb 1242 turbo and covert to hb.

not that u can use many bits from a high bost 1108... pistons wont fit

Yeah...Piston skimming may or may not be an option, but failing that, to lower CR to ~8.5:1 you'd need a 1.35mm HG Spacer. and that'd cost ~£100 to get made!

Ive done the maths involved and it isn't pretty, but ~130BHp is

If you know enough people it's possible...

Hopefully will have one in a few...months/years

the low boost 1242 is pretty impressive as it stands, em's (althought in a sei) was pushing out very nice bhp for a low boost.
best thing is to give van aaken a ring and just talk to them about ideas, they are nice blokes

Firewarrior said:

the low boost 1242 is pretty impressive as it stands, em's (althought in a sei) was pushing out very nice bhp for a low boost.
best thing is to give van aaken a ring and just talk to them about ideas, they are nice blokes

Click to expand...

What was Emm's pushing in the end?

90bhp?

That can be seen from a N/A 1242 so personally I would say go balls out and go for High Boost whats the price of a set of custom pistons hey!

If you can translate some dutch then here is my 1249cc 1 bar Boost Turbo Project.

Also started with an 1108cc 0.5 bar turbo. Still same turbo only a few mod's on the rest of the engine. And in the near future I wil place a little bigger Turbo. To eliminate some backpressure and inlet air temp.

http://213.197.11.130:8000/hypertuning/index.php?option=com_forum&Itemid=40&page=viewtopic&t=2762

There are many pictures on this forum in case you can't read dutch

jamie86 said:

What was Emm's pushing in the end?

90bhp?

That can be seen from a N/A 1242 so personally I would say go balls out and go for High Boost whats the price of a set of custom pistons hey!

Click to expand...

97bhp, and bags more torque than a 90bhp n/asp 1242 will produce. Will give a very different driving experience.

fixitagaintomorrow said:

97bhp, and bags more torque than a 90bhp n/asp 1242 will produce. Will give a very different driving experience.

Click to expand...

Fair enough, would still rather fork out an extra say 500notes for custom pistons though and get an extra say 30bhp!

A while ago I drove in a Cinq 1.1 0.5 bar turbo and I was thinking...this is slow. After some measurements with the G-tech the WHP was the same as my car ith the 1.2 1 bar turbo.

The rpm signal didn't work so I couldn't measure the torque.
But High pressure turbo's on long stroke engine give a lot of more fun plessure.

jamie86 said:

Fair enough, would still rather fork out an extra say 500notes for custom pistons though and get an extra say 30bhp!

Click to expand...

Very true and I'm right with you.

So apart from pistons, intercooler what is the difference between an VA LB and a HB?

Randomman said:

Very true and I'm right with you.

So apart from pistons, intercooler what is the difference between an VA LB and a HB?

Click to expand...

cough turbo FAQ

custard boy said:

cough turbo FAQ

Click to expand...

Missed that little bit!

So what, do they crank the boost on the turbo up a bit then? Same turbo?

Darn, got the turbo bug now,

May have to have a chat with VA come the new year

Hey Firewarrior, you have got to see my cinque when its done, looks totally different.

Now all I want is 2 more 6X9s an amp and a psscht

arc said:

a high boost setup requires a lower compression ratio. you'll need ideally custom low comp pistons to acheive that. a copper HG spacer could be used, buit not the ebst way to go about it.

Click to expand...

why do u say that arc?

if a cosworth running 2 bar of boost is ok with this method a 0.5 bar FIRE will be fine

better than machined down std pistons and a lot cheaper than forged pistons

Randomman said:

Darn, got the turbo bug now,

May have to have a chat with VA come the new year

Hey Firewarrior, you have got to see my cinque when its done, looks totally different.

Now all I want is 2 more 6X9s an amp and a psscht

Click to expand...

6x9s are gash man, get some comps instead

RobW said:

why do u say that arc?

if a cosworth running 2 bar of boost is ok with this method a 0.5 bar FIRE will be fine

better than machined down std pistons and a lot cheaper than forged pistons

Click to expand...

just from what i've read over time, spacer not the best way of doing it - though it does have clear cost adavantages over forged pistons!

arc said:

just from what i've read over time, spacer not the best way of doing it - though it does have clear cost adavantages over forged pistons!

Click to expand...

So a spacer has the same sort of effect on the CR then, hmm

I smell a project coming along

Gotta get enough aside for low boost yet though

And to beastjay, I hear ya man, but I can get 6X9s in my door pocket so easily. . . Just too tempting.