Hot Roddin' the Z

[raminduction]

I normally don't get too involved with forums, but the addition of a '75 Z to the stable required a more humble attitude (thanks, Arne), as the FI was shot (original setup, leaking injectors, bad thermo switch, unknown origin replacement air sensor, etc., etc., etc.), and after adding up the costs to repair the FI and then realizing that it probably wouldn't work with the new, tweaked engine without another huge infusion of funds, the decision was made to switch to carbs. Fortunately, I still have my complete, early '71 setup sitting in a plastic bag filled with Argon. So, a consultation with ZTherapy solved the anticipated fuel flow problem with the purchase of the proper needles to use. I'd prefer using a 390 Holley on my intake manifold, but it isn't ready for that just yet. Yeah, yeah, yeah, FI works great so long as it is the new, direct injection system and you want to spend drivin' time on a laptop.

So, Iffin' y'all want to know how to do suspensions and brakes, build a stroker that works, and know how to make a 4-Bbl make serious HP on any of the L-series engines, you can ask. However, if you can't tell a spark plug from a drain plug, do your learnin' and homework first, please. M.

[kenz240z]

I picked up a Holley 4bbl and an adapter from the salvage yard a few years ago. Haven't tried it on my Z yet. The adapter mounts to the stock Datsun intake in place of the SU carbies. It looks like it is made for a spread bore 4bbl, Quadrajet or Thermoquad. There was a spacer/adapter between it and the Holley, which I think is a 390 CFM.

I've got an L28 from a '82 ZX with a 5-speed behind it and 3.90 rear gears in my '73. It moves pretty quick so I haven't really felt the need for the 4bbl. I guess I should at least try it and see how it compares to the SU's...

[d240zx2]

It won't compare to a set of 40mm Mikunis. 44s would be better, though.

[Z train]

Holleys and DGV Wbers have no business being on a L motor.

[spdcrazy]

I have a holly on my 77 280. Do far so good. Haven't been round other L series engines so I can not compare to other carbon setups. Previous owner put on the holly and Clifford when the FI had multiple problems. Can't wait to get my z all tuned up and see how she performs

[Z train]

I have a holly on my 77 280. Do far so good. Haven't been round other L series engines so I can not compare to other carbon setups. Previous owner put on the holly and Clifford when the FI had multiple problems. Can't wait to get my z all tuned up and see how she performs

On a stock engine,FI is superior to carbs-period.When you start using bigger cams,issues can arise and SU's or Sidedraft Webers/Mikunis are the ticket.With a FSM,there are no factory FI issues that can't easily be resolved.

[blue 72]

Holleys and DGV Wbers have no business being on a L motor.

How about 2bbl downdraft Hitachi setups on inline 6 L motors is that better?