Will LS rods paired with PDN-A00 (US 98-00 GX) pistons fit? I know the rods need to be machined, but I'm wondering if the valves will interfere with the pistons. Will be using a d15b2 head.

 

Nope! LS Rods are the same length and BE Bore as D16 rods.

Engine / Stroke / Rod Length / BE Bore / Rod: Stroke Ratio / Deck Height /

D16A1,A6,Z6,Y5,Y7,Y8,ZC / 90mm / 137mm / 48.01mm / 1.52 / 212

D15B1,B2,B8,B7 / 84.5mm / 134mm / 45.01mm / 1.59 / 207.45

D15Z1 / 84.5mm / 137mm / 45.01mm / 1.62 / 207.45

 

if the head and block are not milled there should be no clearance issues. I'm pretty sure the GX are low comp forged pistons right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thehatchninja &raquo;</TD></TR><TR><TD CLASS="quote">if the head and block are not milled there should be no clearance issues. I'm pretty sure the GX are low comp forged pistons right?</TD></TR></TABLE>

I'm not quite sure, but heres a comparison I found:

P2E-000
92-00 CX/DX
D16Y7
total height: 50.00mm
compression height: 30.00mm
3.32mm dish

P2P-000
96-00 EX
D16Y8
total height: 49.25mm
compression height: 29.50mm
2.12mm dish

PDN-A00
98-00 GX
D16..
total height: 49.28mm
compression height: 30.50mm
2.50mm dome

PLR-A00
01-03 EX/HX
D17A2
total height: 46.50mm
compression height: 27.00mm

The only thing i'm worried about is the compression. I used this calculator: http://www.zealautowerks.com/dseries.html

It came out with 12.3:1 compression, assuming that the d15b2 and d15b7 combustion chambers are the same size. Anyone know if they are? I would like to lower that a bit if at all possible. I might have to swap my d15 block for a d16, which would lower it alot.

The reason I want to use this combination is because of the strength of the LS rods of which I already have a set, and the fact that the GX pistons have the same diameter wrist pins. Bump for more info

 

Umm...you keeping missing the point. The D15 uses smaller crank journals (45.01mm) than the D16 (48.01mm) so LS rods (48.01mm) have too big of a BE Bore diameter and WILL NOT work on a D15 crank.

You CAN use 98-00 GX pistons on D15 rods though. The D15 PM3 (USDM D15B7) piston has a compression height of 30.7mm while the D16 PDN-A00 (USDM 98-00 GX) has as compression height of 29.5mm. This means the piston will be "in the hole" 0.068mm or give you a compression ratio of ballpark (don't know specific dish/dome cc of PDN) of 9.0 - 9.5:1 in the D15B. You could swap heads and gaskets to get a higher ratio. Using the same figures you could get from 10.5 - 11.5 with a D16Y8 head and 2 layer gasket swap (again dependent on the actual PDN dish/dome cc). Use http://www.knology.net/~jediklc/D.htm to play with these configurations.

PS: Pretty use it is the PMS-A00 (USDM 01-03 GX) that uses the larger wrist pin as the LS 21mm (I think!). The PDN-A00 (USDM 98-00 GX) uses the D15/16 pin dia. of 19mm (I think!).

 

ah, ok. Kept missing that Thanks for clearing that up. I really need to get different rods though, would the d15z1 rods fit?(Civic VX) Would a set of VX rods be strong enough for 10-15lbs of boost?

Basically this is the setup i'm planning:

D15b8 block and crank
d15b2 head
PMS-A00 (US 01-03 GX) pistons
VX rods

?

RStoR, I think you got the pistons backwards, the '00 and before were 21mm, and 01+ are 19mm. At least that is what it says on SOHCHonda.com, can anyone confirm this?