Hello I'm new to this forum and I'm building my first honda with a turbo. I'm trying to build the motor up right now to have it in good shape for the turbo, so it won't blow up on me while running 13 psi. I need to know what all needs to be changed on the motor (internals) everything. I've got a few parts in mind for a setup.

-Vitara pistons Low Compression (11:2)
-eagle h beam connecting rods
- stage 3 camshaft skunk2 or Brian crower
-port to a 76mm bore and polish
-eBay cam gear
-hondata s300
-stage 3 clutch and flywheel from clutch masters
I am also wondering if I have to install all these parts at the same time? Or if I can do them all seperatelt? And also is there anything else that needs to be installed while switching the camshaft and what other parts need to be changed in order to run a stronger motor for turbo. Oh and on a side note I wanna make around 200hp on just the motor and 320hp with turbo. Thank you for anyone's help and advice.

 

Wellllll seeing how I've done numerous single cam turbo builds I'll start you off in this direction..

Vitara Low Compression pistons are not 11:2 and also the oversized bore is unneccesary, stick with STD 75.5mm and you'll be fine if you plan on boosting. When building a motor for boost it's not the PSI that matters, it's how much HP your motor can handle. For instance, a D16Y8 can hit those numbers and it will not be hard at all, the head alone can handle over 400hp on stock internals, but $$$ and tuning is where your going to want to focus on. As far as 200hp all motor Y8, that's highly unlikely with the parts you have listed. I've seen fully built/stroked 1.6 SOHC's barely in the 200's, and to hit those numbers n/a you're gonna need a **** ton of compression and for a boosted motor that's not always the best thing.. You're going to be around 8:5.1 with Vitara's with STD bore, and even with oversized pistons it won't differ much from that, maybe a slight increase. Anyways, to hit 300hp in your Y8, get a nice turbo setup (air/fuel upgrades = power), and get a nice tune on there, and good strong clutch/flywheel and you'll be right around 300 all day.. My last GT28RS'd D15B was putting 347hp @ the wheels with a Vitara/FJT piston & rod setup @ 22psi, Cast Mani, ACT stage 3 6-puck sprung clutch w/ 8lb flywheel, 450cc DSM blue top injectors, Crome Chipped P28, 3" exhaust turbo-back, plus a stock head and ran 11.7 @ 118mph.. Was planning on upping to a GT30R and aiming for 450hp and into the 10's but she got stolen and I bought an EM1 after that so that was the end of my single cam days...

BTW, If you're only aiming for 300hp I wouldn't even touch the head anyways, maybe an OEM master gasket rebuild kit if anything. Good turbo, good tune, and some nice fuel upgrades is all you'll need.. Everything else is just reassurance, but than again I've seen $10k builds blow up just like I've seen $500 builds blow up.. No 2 motors/builds are the same..

 

Couldn't have said it any better. But at the same time I wouldn't exactly discourage him from touching the head if he has that type of disposable income. With the cam and I'd go with springs and retainers and p&p. He'd be able to make decent power even at low boost in comparison to a stock head

 

So your saying all I need to do is replace my pumps,pistons, good turbo set up, good tune and strong flywheel and clutch and I'll be good?

 

Is the hondata s300 a good ecu? Or too much?

 

And also without a good tune what parts would be wise to change? (My friends question) and are sleeves necessary?

 

Pretty much

Yes it is very good and the interface is easy to work with

Sleeves are not necessary unless you're planning to run a **** load of power and The other question is a bit vague so I'm unable to answer


Open for corrections if needed

 

He means if the shop he goes to isn't like a car god of tuning would it be wise to change some internals like the camshaft? And also if I don't change the camshaft wouldn't it break? And also what's the difference in stages on clutches and camshafts?

 

Oh and also what size turbo and kit was gonna go t3 or t4? And aren't all kits the same and your just paying for brand name?

 

Well he shouldn't be at a shop like that in the first place tbh. Not trying to be a **** but tuning is vital to the reliability and longevity of a motor imo. But in such a case I think it would be wise to have all oem parts so if they're broken they don't cost an arm and a leg to replace. Also the difference in stages of cams is the duration and degree of the cam lobes i.e. how long it opens/closes the valves for and things like that and as for clutches the difference is with the feeling/weight when engaging/disengaging the clutch. And each stage has a certain amount of power it can withstand before breaking

No. pretty much every brand of turbo is different. With one setup you may have to run up to 15 psi to make 250whp and with another you can make 250whp at only 8 psi

 

Which turbo kit would u recommend?

 

The difference in stages in lamens terms is simple, the higher the stage the more aggressive the part, the lower the stage the closer to stock specs is the part..

Like I stated already, I wouldn't even touch the head if you're only aiming for 250-300hp. Maybe a valve adjustment and some new guides or something, but valves, cam, camgear, etc I'd leave stock if I was you and having done this a dozen times I'd say my intuition is pretty much on par with what to do/not to do when it comes to building a D. If you told me you wanted 450-500hp we'd be having a different discussion but I'm only gonna stay on track with your intial post of attaining 300hp..

To break a camshaft you're going to need hella more power than 250hp, just leave it be..

Not even two identical kits are identical, put it that way.. I've pieced together kits using the same parts, expecting the same results, and ended up with two entirely different outcomes.. You're not paying for a brand name, you're paying for guaranteed reliability and something that's be professionaly manufactured and is tried & true.. After having an ebay kit, than piecing together my first 60-1 turbo setup, I'll never buy a "complete kit" ever again..

For that goal you're aiming for, and unknowing your budget, I'd say go with the GT28RS, it's a crazy fast spooling turbo and puts you in full boost at mid-low rpm so it makes up for that torqueless wonder of a D16.. Maybe even a Garrett T3 60-1 would suit you just fine, and put you up into to mid 300's with plenty of power to still gain on that turbo if you decide to push it a little harder..

I'd rather build a motor for 400hp and ride around tuned at 300hp all day, than build for 300hp and drive it like it has 400hp...


Pick 2

 

ok understood and also as long as I use stainless steel piping i should be good right? for my kit to hold all of that boost? I was just gonna buy a kit and use a different turbo like one from precision or garret like ur saying? is that a good idea?

 

sooo true for all of it right there.

sohc's have 2 enemies when it comes to bigger power. head lift and gearing. dont run anything less than an ex trans. otherwise d2b is an option, or if its going into a crx/ef i think you can run a d16a1 trans using da teg halfshaft and axles. i had a buddy do that it worked out great

headstuds are a must, and i would torque them more than the factory spec, maybe end up somewhere 70-80ftylbs.

hondata would be great, neptune if you want to save a bit of cash.
you really dont need to touch the head for 300ish hp. if you do just dont get a "turbo" cam. they seem to never perform as well as a mild all motor cam. ive always wanted to try the zex cam.


the last vitara motor i had a few years back ran a 15t from a saab viggen. i had it up around 250whp on the dyno at like 14 psi before the internal gate started falling off boost.

dont go too big on your turbo and dont be scared of a .48 exhaust a/r. too big and you will hate the powerband.

t3t4 50 trim
16 or 18g
gt28rs would be sweet but its lots of money.


mess around looking at compressor maps. you will probably be in the range of 30 lb/min and 1.8-2.2 pressure ratio

dont forget to notch the block and girdle!

 

Fixed^^

The OP doesnt even know what a comp map is or how to read one. Has no clue what hes doing or what needs to be done. Just a bunch of cash and a dream.

 

thanks, i was pretty involved in my cup of coffee when i posted that it was off the cuff lol.

where do i sign up for bunch of cash and a dream.