D15B7 vs D16Z6 cost effective build Q?
 

Heres what I'm thinking about. I'm going to be doing a TT rod + vitara piston build so I can up the power A LOT. I have two options that I'm looking at right now:

1) Rebuild D15B7 (300k miles) that I have sitting around

2) Do above ^^^ but my current Z6 head on the D15 bottom end

3) Source out a D16Z6 and then have it rebuilt


In your honest opinions what would be my best bet at making 300hp? Could I attain 300hp on a D15B7 TT vitara setup?


Currently running D16Z6 (soon to be boosted 3psi @ first with MBC to up to 7psi when I'm comfortable)

Re: D15B7 vs D16Z6 cost effective build Q?
 

rebuild ur current z6.
if u need a running car, throw the b7 in there temporarily.

Re: D15B7 vs D16Z6 cost effective build Q?
 

your a ------- genius! Why the ---- didn't I think of that ----? Thanks

Re: D15B7 vs D16Z6 cost effective build Q?
 

Fjt sells d15 rods, there about 300 but there thick.

Re: D15B7 vs D16Z6 cost effective build Q?
 

d15 rods for the d15b vtec, which are identical to d16 rods. b7 rods have 1.5 journals, d15b have 1.6 journals

Re: D15B7 vs D16Z6 cost effective build Q?
 

I know a few months back fjt was trying to get rods for a usdm d15, did anyone hear word on if those are in or not?

Re: D15B7 vs D16Z6 cost effective build Q?
 

still in the works. if it ever does happen, fjt is going to have a major niche in the market

Re: D15B7 vs D16Z6 cost effective build Q?
 

Definitely. People would like an alternative to $7-800 Crower d15 rods.

I still say it's worthless building a d15, but whatever floats your boat.

Re: D15B7 vs D16Z6 cost effective build Q?
 

Reason I sent FJT a few D15 OEM rods :)

Re: D15B7 vs D16Z6 cost effective build Q?
 

Yeah rods for a d15b7 are hard to come by. BUT

I just had the idea....

What about B16A rods? it appears they are only .015" longer than D15b7 rods.... I'm going to play around with the compression calculator... I could be on to something.

Re: D15B7 vs D16Z6 cost effective build Q?
 

Not hard to come by at all. Just very expensive.

Re: D15B7 vs D16Z6 cost effective build Q?
 

rod length is only one measurement

Re: D15B7 vs D16Z6 cost effective build Q?
 

JB Weld accounts for differences in tolerances, machining, etc. I use pinto rods.

Re: D15B7 vs D16Z6 cost effective build Q?
 

You know, if rods could be found for cheap for a d15b7, it would make for a super cheap build. I mean most people THROW AWAY D15s. so most of the time I could probably source a block for next to nothing.

Re: D15B7 vs D16Z6 cost effective build Q?
 

same length @ 134mm C-C, but wrong rod journal.

Re: D15B7 vs D16Z6 cost effective build Q?
 

That is why I sent FJT some D15 rods :)