Thread: can someone help me?

I'm going to clarify a little bit. The EGR is non-existant on the highport. If you need to keep it, you can put the lowport head on the highport block with no problems and use the lowport intake, exhaust, and EGR equipment. If you don't need EGR for visual inspections or smog or anything, just use the highport head and highport intake/exhaust manifolds. There are ways to bypass the CEL for missing EGR equipment in a few other threads.

The throttle plate on a highport is different as well, and the most common way is to simply replace the throttle cable with a highport one. I personally went to route of modifying the throttle bracket to accommodate the lowport cable, but either works. The core of this issue is that the lowport cable is longer.

The distributor will need to be from the lowport no matter what head you use, but it bolts right up and is no worry. When you see the highport design vs. the lowport, it'll make sense. Just swap them out.

As for sensors, the only one I ended up dealing with was engine coolant temperature sensor for the ECU simply because the plug is a different shape. The sensors are exactly the same between highport and lowport, so you could either wire in a new connector to make use of the highport sensor, or you can install a lowport sensor and do no modifications to the wiring.

Last thing I dealt with was the vacuum line from the intake manifold to the brake booster. I used a 90deg coupling with a bit of extra vacuum line I had from Napa and problem solved.

Sounds like alot, but you can adapt a highport to go into a lowport vehicle in less than an hour.

I read your later post and you are right. But New Jersey checks for smog and this guy doesn't seem to be a mechanical guru so how can you recommend this swap unless you're willing to personally hold his hand the whole way through?

Early 90's SR20DE's are starting to fail at this point anyway. I would not recommend someone to intentionally swap a motor of that age into a newer car, knowing that the motor wouldn't last either, unless it is fully rebuilt.

It may be technically possible, but it doesn't mean that it's a good idea at all.

( kudos to you for backing up what you said. )

Reading and thinking more on it, my option of putting the lowport head on the highport engine won't work for you, but it might for someone else. Unfortunately the manifold bolt patterns between the highport and lowport heads means that you can't just swap the manifolds around to keep your EGR on board. It's all or nothing. Considering you're looking to swap engines due to a damaged head, your only option I could see is to try and bypass EGR codes using resistors (someone link the thread on that, my dumb ass can't find it). As for the rest it should be no problem, but considering how NJ does things, making the ECU think there's nothing wrong with the EGR system that isn't there is going to be necessary.

^--- there are a lot of threads here about deleting EGR on an OBD2 car but you'll have to search around for an answer. I haven't seen one thus far. But let it be known that your NOx emissions may cause you to not pass if you delete EGR & NJ goes to a CA-esque testing system where they test the OBD2 system and the tail pipe.

The highport engines HAD EGR. Lots of folks delete it, but it was there. Not sure where you got that info.

I don't know the laws in the OP's area but I'd be more worried about the simple fact of swapping an older motor into the car - some localities are twitchy about that.

If they do a visual inspection, you are in super big trouble in CA. I don't think it's legal in Oregon or Washington either. It may even be a federal thing.

With emissions tightening ever year and more & more states adopting CA standards, it's pretty stupid IMHO.

I think the easiest thing you can do is pull the head and make sure your pistons and bearings are ok. If they are then just swap a lowport head on your motor.

I did not remove my EGR because I do not want my car to fail. I simply do not know what the future has in store for cars. If they find one piece of emissions equipment removed, they can fine you and remove that car from being registered as a public vehicle.

It ain't like it used to be, that's for damn sure. I have no faith in my local or federal government that they will not ignore our cars. In my state, they still do dyno and tailpipe sniffer every year for my car along with a visual. I don't want to ruin it.

To make sure everyone understand me what I'm trying to do is put a jdm high port engine in my 97 200sx. The engine doesn't come with no egr system