Engine rebuild plans. Opinions?

[Never Satisfied]

I am getting ready to start a mild rebuild for my TSi. I am not looking to go crazy with it. It's not a drag car, never will be. Although, it may see the occassional drag strip, auto cross, or "other" races... it's mostly just going to be my DD, with a extra pep to it.

So far, my plans are:

4G63 6 Bolt Block (N/T, so no oil squirters)
Stock 6 Bolt crankshaft
Stock 2G turbo pistons
1G Rods (machined to match pistons)

Stock 1G head (rebuilt)
N/T Cams
MLS Gasket
ARP Studs
?Stock springs (shimmed)?

Clevite 77 AL bearings (rods and mains)
2G turbo rings


I am planning to eliminate the balance shafts and plug the holes as needed. I am also planning to run this with a 5-speed N/T FWD transmission with an upgraded clutch.

I am not so sure about the shimmed valve springs. I have heard of it being done to help with higher rpm and still be budget minded. I do have questions as to where to get the shims from and what kind of problems may arise from them.

Any recommendations on good rings without breaking the bank?

I know this may seem like a kind of mixed and matched mess, but all parts have been well thought out for the goals I am looking for. Not expecting to break 300-350 hp, and really wanting to keep the boost to the low 20's most of the time.

If there are any other things I am missing, please let me know before I get too far into it.

 

[BogusSVO]

I would not worry about shimming the springs, unless neede to gain the proper installed height, spend the few bucx and get a set of BC1100 springs and be done, they will work with your stock steel retainers...

http://www.dsmtuners.com/forums/newbie-forum/341209-4g63t-valve-spring-info.html

you have said the head will be rebuilt.. by who? and on what equipment?

http://www.dsmtuners.com/forums/articles-engine-fuel/303225-engine-machine-work-explained.html

the surface finish will play a big part in how well your MLS HG seals....
http://www.dsmtuners.com/forums/new...face-4g63t-cylinder-head-mls-head-gasket.html

I hope this helps.. feel free to ask me any more questions you have about machine shop equipment or procedures

 

[Eeeeky]

Might i ask why not go turbo? Or are yo planning on doing a turbo setup, on the NT engine?

 

[LiquidX]

Just use OEM rings as they are fine with your setup. Don't shim the springs. If you want to run a higher rev. limit, get aftermarket springs. You don't want to cut corners on a build. I will say that you don't have a reason to run a higher rev limit if you are using the N/T cams. I can understand if you are using a larger turbo with a higher range and using aftermarket cams to work with them, but it seems that you aren't and you aren't even in that high of HP.

You don't need to go MLS for the headgasket as the OEM composite has held high 20's on ARPs, not to mention it's cheaper and you don't need the machine work on the head and block to make it work.

May I ask why the N/T cams?

 

[Never Satisfied]

I am rebuilding the n/t block with turbo pistons and such to put it in my TSi. I got the car that the engine was in for $250 driveable, but stuck in second gear (automatic) and some fairly decent wheels and tires. Lot's of usable parts and such. I mainly just needed the block so that I could rebuild it while still drive my car with the one that's in it.

There are 2 reasons that I am planning to use N/T cams. After comparing specs, I noticed that that fall right between the stock turbo cams and a set of 272 performance cams. They will be a little more aggressive and still have decent road manners. The other reason is that I have a set with less than 10k miles on them. The only turbo cams I have are fairly worn and have close to 170k on them. BC has the specs on the different cams on there page, if I remember. As I recall, it was linked to about 3 posts ago.

I was debating on the MLS vs. composite. Still haven't decided for sure, but I was leaning more toward the MLS for durability purposes. I highly boost would eat through it like it does a composite. But, I have also seen that Felpro makes an OEM style composite with steel rings around the cylinders. Still not sure yet, I doubt I will know 100% until I start putting it all back together.

 

[rhodess89]

if your going to do a ll the work to get those shims on you should go ahead and invest in some new ones instead of risking them on your build

 

[LiquidX]

You said you wern't going to go crazy with the build, so what kind of boost are you looking to run if you are concerned about the composite blowing out? As stated, the OEM composite with ARP studs are good for just under 30psi. If you are planning on running 30psi, you will want upgraded internals.

 

[Never Satisfied]

Not really looking to go over about 23-25 MAX. I plan to stay around 16-18 for everyday. The composite should work, I actually modified my list on paper to correct for that. And not going to shim the springs. I am thinking about upgrading them, but I will have to see what money looks like after I order everything else and get the block bored.

The only reason I was really thinking about the MLS was to have a headgasket that would last longer, but I think the composite will be ok. I had heard ofr boost slowly eating through composite gaskets, but I put a little more time into researching that and it seems like most only have that prolem with the cheap ones you get on ebay or similar.

So, my items that were in question have been changed... Now they will be:

OEM Headgasket (composite)
OEM Springs
OEM 2G Rings


Hope to have the engine built and ready to go by Feb. 1