What's up guys quick question for those of u with expireence and knowledge I have a jam non Vtec d15 b I wanna build the head a little bit maybe springs and cam etc. my question is where or who makes the parts since I'm non v and is there any oem parts I can use whic are better from what I understand head has z6 internal but doesn't make sense to me since it non v also car is in a 94 CX and is running z6 manifold not carberatued

 

you sure its a JDM motor? Just asking cause I've bought like 4 of these in the past and they were ALL VTEC motors.

 

Pretty sure bisimoto has 1.5 non-vtec head internals.

How can a non vtec head have the internals of a z6? You are right that doesnt make since because its an impossibility.

Educate yourself more...there are 3 variants of the d15b. Non-vtec, vtec, and 3-stage vtec.

 

For what?

 

Yea it didn't make sense to me either and the car is gonna be turbo trying to make no more then 220hp that's my goal.

 

Don't spend money on building it internally. Add a vtec head then boost it.

 

A cammed d15b non-vtec would be much better bang for the buck than adding a vtec head. Plenty of threads on here that prove that. fyi

Adding a vtec head then boosting it doesnt address the weak links in the bottom end. He would be able to produce the same amount of power boosted with the nonvtec head as the vtec.

 

Im pretty sure a boosted mini me will pull harder. Because VTAK.

 

Are you not understanding the weak link is the block? Power would be limited mainly from rods/bolts. The same EXACT power would be uptained from a boosted d15b & a mini-me.

You are already cramming air into the motor..."vtec" in a sohc wouldnt make any difference in that situation.

 

Are you kidding me trust me ive seen dyno papers that show the differences with non vtec boosted and mini me's that a boosted. The vtec head gives higher compression and it does make a difference ask anyone here.

 

What is up to a full point of compression increase (depending on what head) going to do on a internally stock 1.5 sohc turbo?
Im grasping what you are saying...but you are telling him to not build the internals and to just mini-me/turbo and it would pull harder... that is simply not true.

If he did take care of the block, swapped to a vtec head, then boosted...that would have alot more potential in terms of power.

Again, stock block (like what you are saying) would be limited to overall horsepower because the block is far to brittle...the vtec head would not do diddley squat when boosted. YOU ARE LIMITED FROM FACTORY PARTS. Could make 220ish whp with either set-up. So please elaborate how same power level motor to motor would "pull harder"

 

1.5liter seriously forgot about that you could be right but if it was 1.6liter it would make alot of a difference.

 

So how do you figure building the head is going to help that? If someone is telling you that tell them to shut up. Those heads can handle more power stock than you plan on making or that the rods are capable of handling.

 

Thanks for all options guys appreciate it all. And at grumblemarc your saying stock block will handle that ok? And in your opinion what do you think would be a good boost psi? I was thinking maybe 7psi 10max and Vtec is not an option I'd rather invest in the head I have before I go Vtec thanks on you options tho

 

PSI doesn't mean **** without knowing what turbo you're even talking about. I really don't know where people are getting this standard about boost pressure being the determining factor on how much power they want to run or what an engine is capable of.

Repeat after me; Power breaks things when boosting. Not PSI.
I state that plainly in the write-up in my sig that no one ever seems to want to read. And it's just a fact.
Stock D-series blocks, if still healthy, can handle approximately 220hp in stock form.
And you better rethink that "VTEC is not an option nonsense" because boost LOVES VTEC.

Might as well rebuild the bottom end to handle more power than waste money on building the head. This isn't a V-8.

 

Forsure thanks a lot ill check it out

 

And btw running a T28 with hks log manifold

 

How big is the compressor wheel?

 

Who cares? It's a T28!!!!

 

what does that mean?^^^ is that not a good size turbo? and im not sure what marking would indicate that?

 

It small, internally gated and perfectly sized for a small D-series engine for fast spool. Who cares how big the compressor wheel is?

 

Yea that why I bought it I figure it would be an perfect size to run with this motor. Small turbo quicker spool.

 

Bump

 

Bump for what? Are you still tripped up on something? What else do you need to know?

 

Well in still curios as to what is a safe amount of boost should run on my setup? I wa thinking maybe 6 or 7 grumblemarc is making me feel a little about my setup considering I'm using a T28 and not the common eBay t3/t4 so I was just curious a to what would be a good boost level