Ok single guys help me out here, im coming from the B side of things and im going single because ppl don't expect much out of them as well as me not having B series pockets lol.
I already picked up a Y8 bottom end from my buddy with a stock Z6 head.
The bottom end is bored/honed, notched, I THINK the crank is micropolished and comes with Ealge rods and Vitara pistons.
Now Im looking to make around the low 400's on this setup but I wanna ditch the Vitaras because Im not looking to boost the hell out of my setup to make these numbers because of the such low compression the Vitaras yeild. I have a full turbo kit already which consists of this
Precision SC6169sp
2.5 piping
27 by 11 by 3 FMIC
38mm Tial gate
50mm Tial BOV
Siemen Deka 750cc
Now I plan on making this my daily driver as well as a track car whenever I want to bring it out there. Any opinions on what to do? I'm obviously going to build the head but I would like advice and if I can reach these goals with what I have in mind

 

I'd keep the vitaras since you already have them. How many psi do you call "boosting the hell out of your setup" ? I've seen low 400's on 23-26 psi from a lot of these setups (check the turbo sohc thread)

I'm on 8.5:1 comp wiseco pistons and I make 324@ 16 psi and I will still have to go to at least 20 to 25 psi to make low to mid 400's. What's another few psi going to hurt? If your expecting 400+ hp anywhere in the "teens" psi level your messing with the wrong motors.

 

It's more than possible with the right setup. Head work is crucial on these builds if you want them to be efficient. The stock D series heads flow like ****.

 

No im not looking to make 400whp @ 15lbs exactly but I don't want to have to turn it up to 27psi to get into that range either, and I have heard that the Vitaras yeild very low compression which would in turn need more boost to make more power but none the less back to the question at hand. Would a 400whp single cam be a handful to maintain or am I asking for too much of of a setup like this for a DAILY DRIVER

 

I see, well in that case I'll try and get the head fully ported with full bowl work and a decent valve job

 

Combustion Contraption

 

huh?? lol

 

It's not too much to handle at all if you don't cheap out on important parts or take short cuts and go to a reliable tuner. Every failure I've had so far was due to cheap parts and now that I know better it won't happen again. I love turbo d series because maintenance wise you can't beat them (ever had to re torque b-series head studs lol) and most of the parts are cheap and easy to find. The only trouble you might have is transmission trouble.

The vitaras do yeild a very low comp ratio with oem height rods. I'm not sure what exactly but under 8.5:1. I think head work will help but imho your still looking at running 20+ psi. regardless unless you go 9.5:1 plus or something. I don't think your normal head work is going to get you what you want and the type of head work and part's that would net you 400hp in the teens is going to cost 1500-2k unless you have hook ups..

(example custom bisi cam 350-500 dollars, his spring and retainer kit that's compatible with that cam is 365.Assuming the cam was 350 your at 715 without picking up an intake manifold or throttle body or having port work done and this is assuming no mill work is done and you don't need a cam gear. Add in a good manifold t/b or oem manifold and t/b port/bore job and your over 1000 with no head work done yet. I'm not saying your using or suggesting you use bisi parts that's just the only place I know to get custom cam prices)



I'd love to make or see someone else make 400 +/- in the teens on a d16 so don't let me deter you if it's your ultimate goal.

What fuel do you plan on running?

 

Oh I understand. I had planned on running a Bisi as well as a full valvetrain and quite possibly a 70mm throttle body along with an aftermarket intake manifold, but I think with the size turbo I have I don't feel I should have much trouble getting into the 400's. I plan on running 93 octane, I know on these motors that's pretty much near or around the limit for pump gas but this is what I would like to achieve. Just because I went to a D series does'nt mean I lower my expectations

 

Well it looks like im picking up a sleeved Y8 bottom end with 75.5mm bored for 300 smackaroos......now it's a whole new ball game :-D

 

one of my best friends has a built d16a6 with a z6 head eagle rods,je pistons, stock port head, jg stage 2 all motor cam, valvetrain and a b16 Tb he makes 488 hp @ 29 pounds, IIRC he broke 400 just over 23 psi, you dont need a ported head to make over 400

 

also, he is on a gt35r

 

You don't need one, but it helps A TON. The more VE, the better.

 

OP you said 2.5in piping. you talking bout charge piping or exhaust? cause you're gunna need to go w a 3in dp atleast. dnt forget a fuel pump, good clutch and tires etc.

gl. im shooting for the 300whp range on a z6 w cp's

 

That's sick. Im using the SC6169sp, That's in the neighborhood of the extent that I want to go to with the build.

 

2.5 IC piping lol. 3 inch downpipe was definetly a must

 

Well if porting and what not is in the budget and the cards then it will be on the to do list

 

Good luck you seem to have a good head on your shoulders and a clear goal in mind. Im on my 3rd setup and love the single slammers....Ill be looking forward to see how this turns out for you..........

 

No one said you need a ported head to make 400. I said I don't think anyone is going to make 400hp in the teens (between 13-19 psi) without a sick ported head though.

My personal goal for my car is 450 at between 20-28 psi on a stock port head so I know it can be done.My motor wants to make way more power then 324.We haven't even got out of it's efficiency range yet. We turned up the boost 1.5 psi and made exactly 20 more hp so it's got tons left in it we just had to stop because the skunk2 intake manifold water inlet popped out.


Btw if you get a skunk 2 manifold for your build make sure it's a newer one.

 

Yeah most def. My goal is to get as close to 450whp as possible because it WILL still be my daily so I don't want anything that will just be retarded for the street even though I have the capacity to do so with my given turbo

 

You seem to heading in the right direction with your build. Although, 450whp on pump isn't a realistic goal for a daily driven d-series engine.

 

Yeah, i didn't really expect that much out of 93 but I want at LEAST 400 out of pump

 

If you want 400 out of pump head work is gonna be a must or start looking into some water meth inj. There have been a few people that have made it there but if I remember correctly they used rather large N/A cams and I dont remember seeing anything about head work. But they did do it at about 20-23psi. Plus there tuners where pretty damn good......IMHO 350 which should be rather easy and safe on pump is pretty decent for the street you will see.......

 

Oh, I see. I might just get two seperate tunes. A daily conservative on Crome with like 350whp and an AEM tune for race gas

 

If you're going to run AEM, why not just do both tunes on that....?