[Why did you decide to stay with the Datsun L6 motor?]

off the top of my head, last time I checked official SCCA classing, 3000cc displacement is the magic detail. basically if you don't have a stroker, any Z engine combination is allowed up to 3.0L for both BSP and FP.

 

basic [national] SCCA classing and allowable mods for S30s (other than stock):

 

BSP - suspension, seats, camber plates, electronic ignition, etc

SSM - BSP allowances plus > 3.0L engine, turbo, V-8, composite hood, etc.

 

FP - full slicks, significant weight reduction, chassis stiffening, fender flares, etc.

XP - FP allowances plus > 3.0L engine, turbo, V-8, etc.

 

Well setup S30s dominate FP at the national level. They won't make the cut in any other class at the level. FWIW.

Lol, I had that all kinds of backwards (I thought FP was factory). BSP will likely be my goal, as I won't have stacks to pour into this thing until a little later in life. Glad to hear the L28 is allowed, hopefully it's the same for my local events too.

 

Only kink I can see is the harness bar. Was really hoping to install at least a harness bar for DD use to compensate for the lack of airbags.

 

Edit: and I just realized that talking about harness bars completely took this off topic. My apologies.

[Why did you decide to stay with the Datsun L6 motor?]

Great advice for sure, and amazing news about corner balancing perfection without an SR20.

 

I really do need to check my local rules, as the 240z will definitely see a lot of autocross (and maybe some track fun days). But, no, I'm not expecting to win much in a 197x. I'll have to check my own local rules, but does yours allow a L28 240z in BSP (I'll assume that FP is out of the question... even though they are very similar factory engines).

[Why did you decide to stay with the Datsun L6 motor?]

Or you could go turbo KA24DE and have that torque and a smaller mid engine...

 

 

But yeah, an L6 will always sound better.

True. Plus, would be super easy to get my hands on.

[Why did you decide to stay with the Datsun L6 motor?]

Our stock 240z has 51% of the weight on the front. I know that because we paid to have it weighted for corner weights. It is also within 30 pounds on the diagonal weights. And that is stock without us adjusting anything.

 

I have not done any auto-cross driving, I am into road racing (on a track). For auto-crossing you would be better off with a motor that provides good low-end torque. The stock N/A L24 has that torque. Adding a turbo takes away from that nice low end torque. I assume that a small 4-banger will not have the low-end torque of the bigger L24.

 

When you do get a 240z, drive it for a while before you make the decision to loose a good and proven motor. The L24 can be built to provide 250 HP. In a car that can be lightened to 2200 pounds or so, 250 HP is a lot of power-to-weight ratio.

Nice! Thanks a bunch bud.

 

Only reason I'm so concerned about swapping before I even buy the car is that I keep seeing a bunch of L28 swapped 240zs pop up. So, I keep wondering if I should be looking harder at those... or if the engine is irrelevant (if I just end up swapping in a SR20 anyway).

 

Only issues I have with the L24 is the carbs. I've never owned or worked on a carb before, and would feel a lot more comfortable with an EFI L28 running a modern EMS.

 

That video posted earlier of the L6 ripping really has me leaning back to a keeping the inline-6. That thing sounded phenomenal. Though I'm sure the SR20 should be a great engine still for autocross in a car as light as the Z (though you're right, the low torque of a L6 would be much better), it'll never sound like that.

[Why did you decide to stay with the Datsun L6 motor?]

A lot of people will say SR20 for the reason you just stated.

It easily puts down the kind of power I'll be happy with on such a light chassis, and the thought a (basically) mid-engined 240 is incredible.

 

Then you need to do some searching here. A set back L6 will have its weight distribution within 1% (or less) of an SR20DET swap.

I was hoping someone would mention this, as I thought I read this somewhere (but seemed too good to be true). I've seen 2 240z' in my life, and only one with the hood up and didn't think to check for this. From the pictures however, it's hard to picture.

 

Is there a mount kit in existence, or are the only ones around custom jobs? Firewall modifications?

 

Seriously interested, as if we pickup the house we're looking at I'll finally have a garage to store a Z, and I might have a more serious look at the L28 swapped Zs I see keep popping up.

[Why did you decide to stay with the Datsun L6 motor?]

I'll preface this by saying that I don't have a 240z yet, just curious.

 

Always thought that when I pickup my Z I'll have a SR20 swap planned, and for one reason: weight distribution. For those of you autocrossing, what engine would you prefer? A turbo L28, or a SR20?