Educate me on VG30 pistons

[1600dave]

The ACL piston catalogue lists three types of piston for the VG30 engine :

 

6MKRY8034 - VG30E SOHC V6, 1984-1988, with a 21mm pin diameter and two slight valve cutouts in the crown

 

6MKRY8035 - VG30I SOHC V6, 1990-1997, with a 21mm pin diameter and two slight valve cutouts in the crown

 

6MKRY8036 - VG30E DOHC V6, 1989-1996, with a 22mm pin diameter and no cutouts in the crown (completely flat top piston)

 

I'm just trying to confirm exactly what models I would find the flat-top / 22mm pin diameter piston in ? The ACL catalogue refers to it being in the Maxima, was this the same DOHC engine fitted to 300ZX's ?

 

I guess the obvious solution is to either buy the ACL 6MKRY8036 pistons or specify by model / year of car, but I'm looking at other brands (not ACL) and its not going in a VG30.

 

[pauly_adams]

what are the pistons going in, there are actully more then just those pistons, you have vg30 out of a cima, a z31 300zx sohc, z32 dohc, maxima, im sure there are even more the maxima the cima and the z31 are similar the z32 i have no idea but i do no you can use z32 pstons and rods in a z31 so best be is ring acl

 

[1600dave]

The aim is to find a piston that will work in a Datsun R16 (ie the engine out of a Datsun Fairlady 1600).

 

I'm starting to look at ideas for building a race engine to use in a Group Sb historic Fairlady - browsing various piston catalogues gives the VG30 piston as the most likely candidate (bore size is close to perfect, and gudgeon pin size is good if using either BMW or Honda conrods, which are in turn the correct length and big end diameter). I guess the single cam pistons would work, but the valve flycuts in the piston tops will lower compression slightly and are in the wrong position for the R16 valves (and they just look "messy  ).

 

The idea is to find a shorter, lighter piston and longer, lighter (yet stronger) conrods.

 

If I can't find something off the shelf, I guess custom pistons are another option. Currently just in the "investigation" phase of the project.

[pauly_adams]

try getting 1mz pistons from a v6 camry, they are 87.5mm stock bore and have a realy nice crown nice and thick, they are about 51mm long but the only problem is they have a 24mm piston pin

 

[1600dave]

Hmm, they look OK, will have scour the conrod catalogues  to see if I can find a suitable rod to match the 24mm pin.

 

Thanks for the suggestion 

 

 

[tbscobraZ]

Great stuff just bought a maxima.

[Linton]

Great stuff just bought a maxima.

Huh!!  ???

[tbscobraZ]

Ah my bad misread thought you said vq30