logr

Armand, I really like that intercooler set up. I did that on both my SX's and was thinking I would do it on the Z. I have experienced heat soak from the rad. at autox. I plumbed the windshield washer to the intercooler front and use it in grid. It solved the problem and also makes sure the engine never overheats. I've never had that problem though. I was thinking, with all the room left in the Z in front of the engine, I would separate the intercooler and rad. a bit more. On my SX, I have kept softening the rear, for traction. I also eliminated the rear sway bar and added 1/4 in. toe on the rear. It helped tremendously. I have a helical rear so if you lift a rear it goes open, not good for autox. It now works great and I love the helical. Nothing to wear out.

In case anybody is interested there are 2 videos on utube of my sx running autox. Search Logger Mike. Gotta say I really like SR's. Seems to me that a SR20Det in a Z has got to be a great handling car. Mid engine weight without the engine behind you. More balanced and less likely to snap spin like MR2's.

In SM2 the weight can be 200 lbs lighter. It would have to weigh 2280 lbs. It weighs 2350 right now on an unofficial scale.

A little background first. I have SR20Det's in 2 240SX's. One is a daily driver and the other I use for autox and the occasional track day. I do very well in it in Street Mod. A co-driver just won a National Tour in it against the Canadian National Champion. The engine/ecu is completely stock with a T28 on it. The power is great and I have to weigh in at 2480lbs to be legal. I also own a 240Z with an L28 which I believe needs an SR. The more efficient engine and better mileage along with the power and light weight just seem to to be the ticket. My Question. Has anybody here autox'd an SR Z with any success? The class would be SM2 and around here we combine SM and SM2 so with the Pax. I would have to beat the SM cars by about half a sec. to actually beat them. A friend has a 240Z with an L28et which is great and smoother power but I want an all around car. The mileage on the L28et is terrible. I'm leaning toward using a T25 on the SR for the smoother power and 240ish HP is plenty in a lighter car. I have the SR and am just about ready to start. I'm doing the swap but was just wondering how much it lightens the front and how much it affects the handling, good or bad. I'm sure lighter springs in the front will be needed and subsequent chassis tuning but has anybody done this already and had success? Thanks for any input, Mike.

That is NOT normal. I would check them all very closely. It is usually caused from no oil on that lobe. Check the oil holes in the tubes that lube the cams. I always soak the pipes in carb cleaner and blow them clear. You should also check the cams. The rockers should be smooth with no wear lines on them, otherwise, replace them.