Cylinder boring

[dogbreath]

Re: Cylinder boring

What is your goal for this build? How much hp are you looking for? I have a 3L crank that I would be willing to get rid of. I have the name of a couple guys that might be willing to bore your motor for you in edmonton.

[R-Audi]

Re: Cylinder boring

Not sure if you saw the post on AZ or Quattroworld... but the Agtronics turbo kits look absolutely amazing! I believe they were 8k. (Plus fueling) Bonus they are Canadian... and produced one o the fastest S4's in NA. (Guruman's matte black S4 with 2.7T swap.. ran 10's all day long)



http://forums.quattroworld.com/s4/msgs/76169.phtml

[bart]

Re: Cylinder boring

precision engine i think is alright i got mine done there

[Mister T]

Re: Cylinder boring

Although the guy mainly works on domestic racing V8's, Comp Services in Crossfield is another good place to check into. Take a trip out there one day and talk to the owner Burt Kurtis and see if he'll take you on a quick tour of the shop, that alone is worth the drive. This guy is unreal and I think he has pretty much every piece of engine building machinery known to man.

[aliencurv]

Re: Cylinder boring

one word: gt25-40r w/ .70 a/r. not many are familiar with the extensive selection available in the gt25 ceramic ballbearing line. there is also the gt25-45r (hard to find) that i beleive has a .86 a/r.

compare your disco potatoe compressor map with the gt25-40r and you won't be disapointed . it's just not cheap. with my gt25-40r, i have nearly full boost (20psi) by 3,000 rpm. amazing turbos used mostly in professional WRC setups. and, it's official garret unlike the disco potatoe

secondly, i wouldn't do a thicker head gasket. if you hire a proper engine builder for the bore, then measuring and fitting new piston and rods for a lower compression ratio is a walk in the park. it should be natural for the engine builder to perform that simple task. then, you can continue to use a reliable head gasker, while your internals are stronger with a lower compression.

third, a displacement bore would obvoiusly weaken the structual integrity of the engine.. but at the same time cause you to spend additional money on fitting and sourcing parts for minimal power gains.

and tuning is going to be somewhat of a concern for you. if the engine builder and the tuner aren't the same people, you will experience trouble.

it's very easy and comfortable to have someone proven reliable build your high output engine. or it's very stressful and complicated if you make it that way. everyone wants to help and make sure it's comfortable, but that doesn't mean they can provide you that comfort. shop around and talk to people, go with who you feel is right.

[R_Ethug]

Re: Cylinder boring

jesus fucking christ that link you posted mark is just DIRTY!!!!!!!!!

[Mister T]

Re: Cylinder boring

[QUOTE=aliencurv;205263]one word: gt25-40r w/ .70 a/r. not many are familiar with the extensive selection available in the gt25 ceramic ballbearing line. there is also the gt25-45r (hard to find) that i beleive has a .86 a/r.

compare your disco potatoe compressor map with the gt25-40r and you won't be disapointed . it's just not cheap. with my gt25-40r, i have nearly full boost (20psi) by 3,000 rpm. amazing turbos used mostly in professional WRC setups. and, it's official garret unlike the disco potatoe [QUOTE]

Are the compressor maps listed on the Garrett website? http://www.turbobygarrett.com/turbob...ochargers.html

Edit: scratch that, I googled the term and it looks like you're talking about a GT-2876. I've always been under the understanding that those can be prone to surge and choking at the exhaust housing unless it's used in an asymetrical turbo configuration. Or are you refering to something else?

[aliencurv]

Re: Cylinder boring

[QUOTE=Mister T;205278][QUOTE=aliencurv;205263]one word: gt25-40r w/ .70 a/r. not many are familiar with the extensive selection available in the gt25 ceramic ballbearing line. there is also the gt25-45r (hard to find) that i beleive has a .86 a/r.

compare your disco potatoe compressor map with the gt25-40r and you won't be disapointed . it's just not cheap. with my gt25-40r, i have nearly full boost (20psi) by 3,000 rpm. amazing turbos used mostly in professional WRC setups. and, it's official garret unlike the disco potatoe

Are the compressor maps listed on the Garrett website? http://www.turbobygarrett.com/turbob...ochargers.html

Edit: scratch that, I googled the term and it looks like you're talking about a GT-2876. I've always been under the understanding that those can be prone to surge and choking at the exhaust housing unless it's used in an asymetrical turbo configuration. Or are you refering to something else?

i've had 2 gt2876's (gt25-40r's) and have convinced many many ppl to go that route. i've never experienced a surge or choke. i should take you for a rip in svtf and you'll see how amazing those badboys are. problem is, they're very expensive... so rarely used.

perhaps a poor install or mis-understanding has caused a rumour to be spread about these expensive and amazing beasts .. that happens sometimes when something costs more, ppl justify why they didn't get it by saying it's not good.

expensive clothes rarely pay off, but expensive car parts do

[Polishdupa]

Re: Cylinder boring

first my working on the bottom end but the goal is

>600awhp

[Mister T]

Re: Cylinder boring

[QUOTE=aliencurv;205308][QUOTE=Mister T;205278]

one word: gt25-40r w/ .70 a/r. not many are familiar with the extensive selection available in the gt25 ceramic ballbearing line. there is also the gt25-45r (hard to find) that i beleive has a .86 a/r.

compare your disco potatoe compressor map with the gt25-40r and you won't be disapointed . it's just not cheap. with my gt25-40r, i have nearly full boost (20psi) by 3,000 rpm. amazing turbos used mostly in professional WRC setups. and, it's official garret unlike the disco potatoe

i've had 2 gt2876's (gt25-40r's) and have convinced many many ppl to go that route. i've never experienced a surge or choke. i should take you for a rip in svtf and you'll see how amazing those badboys are. problem is, they're very expensive... so rarely used.

perhaps a poor install or mis-understanding has caused a rumour to be spread about these expensive and amazing beasts .. that happens sometimes when something costs more, ppl justify why they didn't get it by saying it's not good.

expensive clothes rarely pay off, but expensive car parts do

I'm pretty much going on what Garrett says on their description of the 2876r
* Best suited for unique applications such as asymmetric turbo installations
* Not recommended for general performance applications

http://www.turbobygarrett.com/turbob...R_705330_1.htm

However, if you find it works for your SVT then that's good to know. I'm wondering if the elevation we're at has any role in mitigating surge. It's not really taken into consideration by the forum guys at or near sea level. And yeah, I'll be happy to go for a rip in the Focus. Bring her to one of the GTG's.

[The_Jerbel]

Re: Cylinder boring

2876's are quite a large turbo for these motors, so you are going to want to be running a 3.0L power plant in order to spool them. You will get significant lag relative to a turbo with a smaller turbine, but will have amazing power up top. For a more daily drivable turbo, you could go with GT2560's and have >550AWHP, and still have amazing power in the lower range of the power band.

[aliencurv]

Re: Cylinder boring

2876's are quite a large turbo for these motors, so you are going to want to be running a 3.0L power plant in order to spool them. You will get significant lag relative to a turbo with a smaller turbine, but will have amazing power up top. For a more daily drivable turbo, you could go with GT2560's and have >550AWHP, and still have amazing power in the lower range of the power band.

not at all. i am very experienced with the gt25-40r.. and as stated earlier, i have nearl 20 psi by 3k rpm. the ceramic ball bearing are fantastic. you'll have to experience one to understand. but, you can look at the compressor map to get an idea if you know how to read them. they're a little goofy to understand. but it'd probably be best to take u for a rip in the svt also.

i'll bring it to the next meet and hopefully u'll be able to attend.

all bow to the gt25-45r

[Mister T]

Re: Cylinder boring

BTW, when you say ceramic ball bearing are you referring to a separate line of Garrett BB turbos or their regular GT series?

[Polishdupa]

Re: Cylinder boring

2876's are quite a large turbo for these motors, so you are going to want to be running a 3.0L power plant in order to spool them. You will get significant lag relative to a turbo with a smaller turbine, but will have amazing power up top. For a more daily drivable turbo, you could go with GT2560's and have >550AWHP, and still have amazing power in the lower range of the power band.

i'm am going to the 3.0 L stroker bottom end and it won't be a daily drive just going to be a mean street monster.....once i'm done

[Disturbo]

Re: Cylinder boring

What crank are you going to use for the bigger stroke