everythingwentblack

Currently Building my first d16z6, and going to have jeff evans tune it. I know every set up is different, I just want to know if im being realistic about my power gains.
Bottom up:
-knife edged z6 crank
-reused my main bolts
-eagle rods
-weisco 8.5 to 1 75.5mm turbo pistons
-topline gasket kit/bearings (all clearances checked out thus far)
-balanced rotating assembly from fidanza to crank pulley
-gt28rs turbo with a .63 ex housing, spoolin quick4ac manifold going to be swain tech coated, and soon to be 3" exhaust (just got a ws2, dont really want to sell it but evans says i have to)
-going to get valve springs and retainers (either crower or bisi)

so heres my question- i want to max the turbo out at 375whp, is that realistic on a stock cam/cam gear? it was done here
(http://dynos.evans-tuning.com/2010/1...p255tq-retune/)
and based on cam profiles from this article (http://www.turbod16.com/viewtopic.php?f=3&t=48083) the bisi 2.4 far surpasses the crower stage 2. eventually im going to shoot for the bisi, but as far as a top end, what in your opinion would be my best bet?

everythingwentblack

Anybody?

blackeg

i think you will need a larger turbo to meet those goals. also, see if you can pick up an aftermarket intake manifold.

pls52202

No that turbo is more than capable of making that power. The most over looked parts when balancing a motor is the rods and pistons. They will need to be balanced as well. The cranks from Honda are very good from factory the part I that is most off is the pistons and rods. Who ever balanced ur crank should of told u this. Good luck

DUKE LADUKE

I think its possible ... or close to 375

everythingwentblack

rods and pistons are balanced// Everything is balanced; OEM crank pulley, crank, pistons and rods, and my fidanza flywheel. I want to be sure my power goals are reaslistic with a stock cam/cam gear. I dont want to go to evans tuning and have them tell me all i needed was an adj cam gear to get to 375.

speedooo

Give jeff a call... he's always been helpful to me and my friends even if we weren't paying customers

sethm

Is the cam something you might get in the future? Why not get a cam now and be done with it?

blackeg

its not a volkswagon.. no need to run 20 something psi to get the power that a larger but still well matched turbo can do in 15ish psi just to say you run 2x psi. get a compressor map and do the math, id bet you are out of the inner circles of efficiency...



ok, there it is. id say roughly that you will need 20is or a tiny bit more psi. translated to the map, you are looking at pressure ratios of between 2.25 and 2.5. look how far up on the map it is...spinning the turbo in the range of 140,000 rpm. as i see it you would be somewhere around 68-70% efficient. to me it looks that turbo will be better somewhere between 15 to 20 psi, but not much over that...

everythingwentblack

Im looking at getting a bisi 2.4 cam actually. I was going to order crower valve springs and retainers today, but might spend the extra 60 bucks and go bisi as well. A cam is something i can swap out after the motors together and in the car, and way i see it non essential. Valvesprings and retainers however is a must. Right now Im still buying oil pumps and water pumps and putting the motor together thats why I wanted to know if 375whp was a realistic reachable number with a stock cam/cam gear. If its not, Ill just buy it early. Cant stress out about a cam when my bottom end is still in pieces. That headache will inevitably occur later. lol

everytime I email him, I always have three more questions once he responds to mine. I just got an account on e-t forums; so Im going to reask them there. I know hes busy tuning 1000whp subarus and feel like an ******* asking him questions about another d series honda.

I know the turbo is best suited in the mid to late teens, not really doin too much over 20psi. I got it with the motor I have, I bought it all as a package deal and ended up ripping it all apart to replace bearings, oil pump, knife edghe/balance etc and the original intentions were to max it at 300whp. Im told the turbo is capable up to around 350, and have seen it go to 375, for a track days and a race tune it would be nice to be able to have my hp closer to 4, and DD it at three. But on the same note it would be nice to have catherine zeta jones as a girlfriend.

Thanks for all the help and keep it coming

everythingwentblack

with all this talk about the turbo maxing out I forgot to mention that im running rc 550's that will inevitably be at 95% of their duty cycle for a race tune (Assuming i achieve ~375whp )