Do any parts interchange on the FWD sr20 cylinder head?

[rx-007]

Well I have two sr20det cylinder heads here both with no rocker arms. I plan on buying oem or find a good used set on the classified soon as I hit 10 posts, to complete my build. But locating a set is a real pita. So while I am at it I would like to satisfy my curiousity by asking what parts are interchangeable on the cylinder head itself. Will our cams and other valvetrain components interchange between non-rearwheel drive sr20det and even sr20de non turbo's? I mean obviously the sr20de are by far more available in the junk yards. However it would seem to me that the non turbo form such as one found in an Infiniti G20 at first thought that these components would be much weaker than in turbo form. Kind of shocks me that a full set of rocker arms bring close to $300 oem. Might as well go with some performance ones.

[Hijacker]

Cams are not interchangable.

Things that are:-Rocker arms-Intake valves-Intake valve guides-Intake valve stem seals-Rocker arms-Valve Springs-Retainers

Everything on the exhaust side is RWD specific. The RWD has a thicker valve stem exhaust valve, so the valve, steam seal, and guide are all different

The distro is driven from the rear of the exhaust cam, not the front like ours, so that's completely different

The cams are different lengths IIRC because the FWD motor is shorter in length than the RWD

[rx-007]

Thanks a lot for the great information. So I'm guessing from your post these parts are just as strong structurally as there turbo sibling.

[Hijacker]

Nissan didn't use any special parts for the intake valves, so they're all identical AFAIK. The intake valves are just fine IMO, but if you're looking for upgraded parts consider checking out what Jim Wolf Technologies has to offer. They have bronze valve guides available for a very fair price. $50 per set IIRC. They also have everything you can possibly want for your valve train as well.

Greddy, HKS, and Tomei all have cams that are very well made, and there are a few companies out there that make springs. Ferrara and Comp both come to mind.

[codyace]

FWIW: Not sure if all are, but JWT Cams are actually interchangeable between the two. Difference being the length of the pin at the end of the exhaust cam...however the FWD pin also works..

Nissan didn't use any special parts for the intake valves, so they're all identical AFAIK. The intake valves are just fine IMO, but if you're looking for upgraded parts consider checking out what Jim Wolf Technologies has to offer. They have bronze valve guides available for a very fair price. $50 per set IIRC. They also have everything you can possibly want for your valve train as well.

You just can't go wrong with a nice full JWT valvetrain Best setup out there for sure!

[Hijacker]

FWIW: Not sure if all are, but JWT Cams are actually interchangeable between the two. Difference being the length of the pin at the end of the exhaust cam...however the FWD pin also works..

I didn't know that. I was basing what I said off the fact that the cylinder heads themselves are different in length. I think the FWD head is a little bit shorter. We tried placing a FWD head on a RWD block a few years ago for sh1ts and giggles, and I remember the physical dimensions just not lining up.

One thing to consider though, is that the turbo RWD motor should have a different cam grind than the FWD NA cousin. Can't confirm that, but I would be stunned to find that the OE grinds were the same.

[codyace]

We tried placing a FWD head on a RWD block a few years ago for sh1ts and giggles, and I remember the physical dimensions just not lining up.

VVL Is off a 'teeny' little bit too to RWD as well....not that we needed to know that, but always good to have in the back of our brains haha.

One thing to consider though, is that the turbo RWD motor should have a different cam grind than the FWD NA cousin. Can't confirm that, but I would be stunned to find that the OE grinds were the same.

Not sure on exact stock DET cams now, but I do know FWD off the top of my head...I'll edit and get the turbo ones on here too

FWD 91 Cams are 248Int/240exhFWD 92-94 are 232/40exh

*Edit:S13 Cams are 240/240...
Modified by codyace at 12:40 PM 12/31/2007