alright guys, in about 2 weeks (i hope) i'll be buying a spare engine for the cobalt. i wanna build it. this is the first car im building. what compression should i go with and such? head work? oem stuff? opinions. looking to be in the 350-400 range is what im shooting for. right now i have a k04 turbo.. may swap that for a s256. feel free to post opinions and pics! thanks!

 

8:9:1 compression, ported head. you have to machine the head to fit supertech springs but the ZZP springs fit as a direct replacement and will eliminate valve float, new rod and main bearings, neutral balance shafts optional, new timing chain kit is always a good idea, new timing chain tensioner couldnt hurt either, 80# injectors, bigger fuel pump, stuff like dat.

 

arp head studs, cometic gasket, have crank balanced

 

stock compression and darton sleeves would be real proper and overkill. might as well spin the **** out it after that but thats a whole new can of worms. for 350hp don't drop the compression if you're sticking with the k04, look at the lnf crowd. the s256 is damn nice but there are better options if you're building your own kit. either way, i'm saying, keep stock compression.

 

whats stock compression? 8:9:1?

 

Stock is 9.5:1 if I remember correctly.

 

Stock is 10:1. 9.5:1 is the stock LSJ compression

 

I say keep stock compression.

 

Stick with 10:1 pistons.

 

okay..whats some other things?

 

Port the head, ARP studs, valve springs, neutral or delete balance shafts, rods and pistons

 

Aluminum Intake manifold if you run over 8PSI. Plastic pops under load and heat.

 

who is building it

 

i will. i9 have access to all of the tools needed.

 

Just take your time with the build by both buyin new parts and putting together. It's very tedius work

 

You plan to pull the motor or do the work with the block still in the car?

 

im getting a spare engine

 

Since you are gonna have another motor and therefore no down time while building, do everything you can. Rods, pistons, bearings, valve springs and retainers, balance shafts, p&p the head, you could do cams but not really necessary on a daily driver. And arp head studs to hold everything down.

 

I got a fully built motor for sale if you interested.

Wiseico pistons10:1 .20 overbore
Bates sleeves
Eagle rods
Neutral balance shafts
Bates hardened oil pump gears
Arp head studs
Supertech dual spring kit with inconel exhaust valves
Ported head
Stage two comp cams.

 

damn that was easy ans quick. LOL

 

Didn't you just finally get that back on the road a couple months ago? Why you selling after all the work you did?

 

i say do this

 

i would if i had the money...

 

either way its going to cost you at least that much

 

i know... its just spending over the course a time compared to at once