Cylinder boring

[Polishdupa]

I'm looking at boring out the S4 block. Anyone know of a good shop that would be able to do the job?

[aliencurv]

Re: Cylinder boring

boring out for higher displacement?

don't.

instead, have your engine bored for new pistons & rods that can support more energy and heat. (i.e. je pistons and eagle rod combination)

don't bore for displacement, ever.

[Polishdupa]

Re: Cylinder boring

I know the limits I'm looking at boring it out to 83 mm from 81 mm , which would make it a 2.8 liter, new rods and pistons are in the works. And I'm going to do a 3.0 liter stroker set up.

[The_Jerbel]

Re: Cylinder boring

Boring out to 2.8 works quite well on these motors...

[aliencurv]

Re: Cylinder boring

I know the limits I'm looking at boring it out to 83 mm from 81 mm , which would make it a 2.8 liter, new rods and pistons are in the works. And I'm going to do a 3.0 liter stroker set up.

aight! well, talk to meyers if he'd touch an s4. i don't know who he outsources his engine builds too? maybe lightspeed?

i know you might be able to convince cam @ www.lightspeedinnovations.com to work with the s4.. maybe, not sure how he'd feel about that.

the real trouble with working on these cars, is that the ones that wanna work on it are incompitent. :(

if you could get in with das autohaus (chris meyers) or lightspeed (cam), then i'd go with one of those. anyone else, i don't have much experience.

lightspeed builds a lot of very very high horsepower engines, as they're a performance facility. it's worth visiting both chris and cam at their locations because they each would be VERY valueable resources.

if you're going to change engine dynamics (compression, flow, discplacement, etc). then i would quite honestly suggest a standalone (i.e. vipec) and at the least, have it tuned by cam @ lightspeed on the AWD dyno. you could go e-mail tune routes... but some unbiased research will steer you away from it.

[The_Jerbel]

Re: Cylinder boring

the real trouble with working on these cars, is that the ones that wanna work on it are incompitent. :(

you could go e-mail tune routes... but some unbiased research will steer you away from it.

Easy there, bud. What's with all the hate??

[aliencurv]

Re: Cylinder boring

Easy there, bud. What's with all the hate??

lol, don't feel so guilty. i wasn't thinking about you.

[The_Jerbel]

Re: Cylinder boring

Good, cuz I was just about to start crying

[Polishdupa]

Re: Cylinder boring

I think that was a hit for me

[Polishdupa]

Re: Cylinder boring

The hard part is finding a 3.0 liter b6 crank shaft.

[aliencurv]

Re: Cylinder boring

I think that was a hit for me

lol hit on no one here. it is general experience, for reallies... i'm not writing any of this with hate or negativity.

my honest suggestion would be to not worry about bore for displacement because the power is minimal relative to integrity.

i'd bore merely to fit custom pistons. i'd drop the compression by a few points, maybe flatten down to 9.0:1... then i'd throw a few high flow turbines on there. if the engine is out, and you hire lightspeed then a modified/custom manifold for two gt25r-400 series turbo's would be unreal.

or, if you're craving a monster then go two gt30r's... but then i'm concerned with drivability.

did you want to come up to LS on a friday and see what it's all about? check out the engine room and the facility? plus, it's just fun to chill with good people who have a lot of real life experience with failed build attempts. much easier then sitting behind the keyboard

[Polishdupa]

Re: Cylinder boring

This isn't the first 3.0 liter b5 s4 ever built, 034 has a good break down, but a bored out block with 8.5:1 pistons, compression dropping head gasket and a b6 3 liter crank is a solid set up and I'm going for a gt 28rs set up

[aliencurv]

Re: Cylinder boring

This isn't the first 3.0 liter b5 s4 ever built, 034 has a good break down, but a bored out block with 8.5:1 pistons, compression dropping head gasket and a b6 3 liter crank is a solid set up and I'm going for a gt 28rs set up

disco potatoes eh. the ceramic ballbearing gt25r-400 has a .70 a/r and can produce more power. there is a lot of mis-education amongst turbo understanding.

i can help. but if you're convinced with your route then let me know and i'll let you carry on and stop msging you.

[Mantis]

Re: Cylinder boring

have you considered honing the bore and clearancing for the 3.0 crank, that way you could be at almost 3.0l but you wouldn't have to take any meat off the walls

[Mantis]

Re: Cylinder boring

Also if you need a 3.0l crank, and you are serious let me know, I can definitely get you one, worst case scenario, I have one in my basement that I was going to use