As some of you might recall, I built a new engine for my 240C coupe that was originally going to be turbo'ed. Since I put this car on the track, a change in direction to keep it NA kept me in a more appropriate class, so a new head was sourced.

The P90 with 1mm oversized valves was taken off and replaced by a late model E88 from an injected 2.4E engine. With L28 valves and a CNC port job, 300 degree duration cam, 595 valve lift, 1000cfm 4 barrel throttle body, on a Clifford manifold, headers and a 3 inch exhaust running a stock 280zx dizzy, the engine did this today.......

159.1 kilowatts =

213.356614 horsepower

That's strong!

N42 have dished pistons?

Wow OZ nice numbers! Is that right 213 h.p.? Send some pictures mate. Pump or rocket fuel?

L-engines and Cedrics...mmmmm. Got both of those waiting for restoration...Nice dyno sheet man!

Any more questions about the effectiveness of proper head work?

Like to see the numbers replacing that n42 block with a 54 flat top block.

Very good numbers!!

I'll get back to you all shortly, I'm off to the racetrack for some fun! :-)

Lean out the mixture a bit to 13:1 and you'll make even more.

At the dyno getting tuned yesterday.

Its an N42 bottom end with JE forged slugs, for a VG30DETT and they have a 4cc dish, or so in them. Custom rods, 136.5mm's and a 22mm small end for the piston pin. The Rod to stroke ratio is better and akin to the engine Diseazd built and is building again!!

Yep, you're right LeonV with the mixtures, 13's do make more power. I can follow up on this shortly.

Temps rose a bit higher at the track with the more powerful engine. I've got some fixes in mind and some parts to replace but nothing major.

Car ran very well, I pulled away from a Holden 308ci ute down the main straight. Funny who I should see peering under my bonnet at the end of that session. We introduced each other, compared notes and had a chuckle. I love that comradery. Happens every time I go there to the track.

Great day full of great moments. :classic:

Chamber size around 39cc ?

Chamber size around 39cc ?

yep, 40.5cc IIRC

I have been in discussion with several people at the track. It's certainly a hotpot for information exchange, some good and some not so good. Most of the interest on increasing the power output of this engine revolved around the exhaust, notably the headers. that's cool, they're nothing more than off the shelf, generic interference headers. There is a company local to me that produced the modified head, they also have a matched set of specially tuned headers for the exact combination of head and cam that i have, so it seems only logical that i use that.

The ignition is another area that will receive some work, eventually I'll convert to mapping with megasquirt. I have all the hardware, I just need some time to do it.

I'll keep you guys posted...

Cheers.