Ok I am thinking of having the L61 ported cnc machined head from crateenginesdepot.com installed onto my car with some aftermarket cams. What kind of HP do you think i can expect with this mod and will it still be emissions legal?

 

yes it will be emissions legal, it accepts all stock components and as long as the cams are stage 1 you wont having any problems w/ tunning, upgrading head studs, valves, springs, retainers or anything of that nature.

as far as hp, on a n/a motor it wont be much unless you've bored the block and have a high comp motor. w/ cams it'll proly get you 10hp at the wheels. make sure you upgrade your engines breathing.

 

Emissions yes. you might want to invest into some other valvetrain stuff too.....I think it'll be more than 10whp.....probable more like 30. CNC port&Polish rates like 10%-20% increase plus cams....10-15WHP

I have a set of Stage 2 TF L61 cams FS if you already don't have some

 

are you talking about WHP or crank? stage one cams are nice but not that nice.

 

If all he did was cams and CNC P&P......nothing should break. But to get the most out of the P&P he should support the mods.



BTW I have a set of Stage 2 TF cams for the L61.......not stock ones.

 

he meant wheel or brake horse power... because that seems a bit extreme of a gain that you're saying

 

So lets say I was To turbocharge the 2.2l engine with the Hahns Racecraft Turbokit and make 198hp and I had also added the Ported Head I would be looking at about 208hp am I correct? Now when you say support the mod what did you mean? To make sure that i have eiter a SRI or CAI or to have the engine block ported?

 

you cant just throw numbers like that per say. a mod like ported heads will react differently to n/a and turbo applications. port and polish is a supporting mod for the turbo so it might be slightly higher. supporting mods for the ported head would be stronger retainers, valves, valve springs, guides, and such

 

Supporting your mods mean just that.....you need a mod to support your mod....if that makes sense. ie if you put more air into your engine (like a CAI) you need to let out that air (exhaust). If your spending the money on a Turbo kit and a CNC P&P....spend the extra money on a valvetrain and lower-end.

you can't just add numbers.....they are usually higher than your going to get......if I did that I would have a 700+HP cobalt

all your mods have to compliment each other

 

So what your saying is that a valvetrain upgrade would compliment the Port and polished head which would compliment the turbo which would be complimented by a better exhaust.

 

my cams and head job gave me 35 so since i was the first to do this you know what to expect

 

there's nothing to "port" on and engine block, but supporting mods like upgrading the valvetrain, intake and exhaust side of things would help out. however, intake and exhaust setups will change if you go turbo so you need to decide whether or not to go turbo before you really get into it too much.

 

Exactly

plus a CAI

 

this is a good point,if you want an all-motor then by all means,but if you change your mind and want to go FI,then you are wasting your money

 

don't neglect the lower end

 

so your saying that if i want a n/a motor to go with the ported heads and valve train, and if i want to go forced induction to not go with ported heads am i understanding you guy correctly?

 

most members will tell you this a ported head and valvetrain with labour gonna run you 2500.00,you might as well save a little more and turbo it,there is a g5 2.2 who just turboed his ride and don't quote me for 3800.00 bucks,I think the meber name is "comp"

 

so most of my questions have been answered however is till am wondering if a port and polished head will be a waste of money for use with a turbocharger or if it would be a good idea/

 

it would never be a bad idea but it is a bit spendy

 

So it is possible.


did you have to send in your stock head in order to get the ported one or how did that work?

 

Without tuning that ported head and cams probably wont give you much gain. Not worth the $$$ without the tuning.

 

^^^ agreed esp. if it's with a turbo setup. tuning would prolly help a lot.

 

to make this simple i'll say build from the ground up...literally... better wheels to handle the speeds, traction mods to support the increased power, crank, rods, pistons head then forced induction. In that order isn't necessary but it gives you a better idea of what needs to be done...you cant put out insane amounts of boost until you have forged internals and a free flowing head. Work from the inside out when it comes to the engine, it's better to "bullet-proof" every thing first but not totally necessary

if there is tunning for the turbo there is tuning for the cams...i believe hahn is using the SCT Livewire.

 

ok well you just answered my next question about wether i should upgrade the Crank as well when i build up the motor.

 

dude you need to do some research. do some searching around and get to know the engine before you plan on ripping it apart. these kinds of questions do not have specific answers, every build is going to be different. if you want to go completely all out, your build is going to be way different than if you just want 6-8 lbs of boost. we can't tell you what is best for your build, you need to decide what you want to do and go from there. p.s. i'm not flaming you at all, it's cool that you're interested in this stuff, but you need to figure out what you want first.