ok, so does a JDM SR20DE motor have different #s than the US built motor? HP, Torque, compression, intake cam? anything at all??

I have not been able to find jack on this matter..

I dont know much about the differences there are between JDM and american, but I do know one thing. If somethign goes out on the JDM, you gonna have a tough time replacing it. It'll take a while, and cost much more. I would sitck with american. I'll be going US when I swap the 20DET into the 240 solely for that reason.

If I knew of somewhere to point you to find the information, I would. but so far the guys here on the forum are very knowledgeable. Good luck!

someone correct me if i'm wrong here, but aren't sr20dets all jdm? there aren't any turbo sr20s nissans available in the US. i believe the one major difference b/w the us and jdm sr20 is the egr. i'm not sure how or why it makes a difference, but jdm sr20s are known to crank out a bit more hps.

He is pulling the DET from one and putting it in the 240, then he has to drop a motor into that other car, so he is getting a us sr20de not a jdm one.

BRent

some JDM sr20's have 10:1 comp. those will have better hp and tq and will naturally respond well to breathing mods. but there are many 9.5:1 JDM sr20's around, and those are similar to the USDM minus the emissions junk.

dono200sx- why would it take longer to replace something from a JDM sr20? are we talkin' internals?

Does any one know the difference in HP between the JDM and the US SR20? If the compression was changed to 10:1 on the US SR20 would it push out the same HP as the JDM 10:1?

Originally posted by dono200sx
I dont know much about the differences there are between JDM and american, but I do know one thing. If somethign goes out on the JDM, you gonna have a tough time replacing it. It'll take a while, and cost much more. I would sitck with american. I'll be going US when I swap the 20DET into the 240 solely for that reason.

If I knew of somewhere to point you to find the information, I would. but so far the guys here on the forum are very knowledgeable. Good luck!
wrong, the only motor that you would have to wait a while for parts and pay more is the gtir motor, the rest of the det's share mostly all of the same parts as the regular de, and there is no det in america either.
Sean

Originally posted by coach
He is pulling the DET from one and putting it in the 240, then he has to drop a motor into that other car, so he is getting a us sr20de not a jdm one.

BRent

Pulling the DET from one what, and putting a US SR20 into what?

Whould it not have to be a Rear Wheel Drive engine for the 240?
There are no US RWD SR20 either. You can't take a FWD SR20, turn it sideways, put on a different flywheel and tranny and make it RWD can you? Really confused here.

JSE-Rious - I will have your answer in a few weeks..

It seems everyone thinks JDM DE's are the best, but most put out the same horsepower as the US engine, unless you happen to get one with 10:1 pistons. So why not just put 10:1 pistons in a U.S. engine? Also in SOME "JDM" engines, aftermarket cams have been discovered, kind of a "pot luck" bonus.

You're right Dan, there are no FWD SR20DET's that come that way out of any factory. And yes, that's exactly what you do, you buy a SR20DET without the tranny and you slap your US tranny onto it and viola, you have a FWD SR20DET. Bolts right in. I think people like JDM's better than US spec because the JDM's are built with tighter tolerances, built to a higher standard.

Originally posted by Stiletto
dono200sx- why would it take longer to replace something from a JDM sr20? are we talkin' internals?

Yes, I'm talking internals. If you go JDM, wouldn't it be better to keep JDM parts in it? No one in the US stocks JDM parts that I know of, so you would have to import the part over here. Please correct me if I am wrong here. Nissan is a butt to order from. One time when I was having some minor dents pulled out of my 200SX, the body shop ordered new door molding from Japan, and it took two months to get it here. I also know of a JDM spec SR20 that isnt working b/c it is waiting on JDM parts. Whether or not it is a good idea to put American parts in there, I am not sure.

As regards my above statement, I was refering to the spec of the engine. I am going to double-check which motor BoostFactor is going to swap in there. It may be JDM spec engine, but I could have sworn we were talking US spec for the swap. I should have clarified myself better. Sorry for the confusion.

Originally posted by Toolapcfan
You're right Dan, there are no FWD SR20DET's that come that way out of any factory. And yes, that's exactly what you do, you buy a SR20DET without the tranny and you slap your US tranny onto it and viola, you have a FWD SR20DET.

Toolly,
That is not exactly what I meant. Yeah I know the DETs that are in the FWD cars are from All Wheel drive cars with the trannys swapped, but the Silvia's are all RWD.
The AWD engine is different than the RWD, correct? That is what I meant to say, "You can't take a AWD engine and change the flywheel and tranny and make it RWD can you?"
That is what I meant to say.
The All Wheel Drive engines are mounted in the car with the same orientation as our FWD cars, but the RWD 240's and Silvia's have the engine mounted "sideways".
So I believe you would need the RWD engine for a 240 swap, and he stated he was pulling the DET from something (still don't know what), and putting a US SR20 into whatever the DET came from. So to sum up, if pulling a DET from some car to put in a 240, it would have to be a RWD car that the engine was coming from, correct?
Part 2: So when replacing the engine in the donor car a RWD engine would have to go back in it, correct?
There are no U.S. RWD SR20's, and that is what I was trying to get at.

By the way, Tool rocks, even named my Yellow Lab "Maynard"

Edit: Sorry, there was an error and I double posted

The DET I am going to have swapped will be from a JDM S13 going into an S13. Sorry, I couldnt tell if you were referring to me or the originator of the post. Looks like we could all pay alil mor attention to clarifyin ourselves. :D Out of curiosity, has anyone attempted to take an AWD DET and turn a 240 into AWD? Is it possible to do? Seems to me like it would be one heck of a beast if someone managed to do this.

I think you're right Dan, I think they are a different SR20 in the S13's. Sort of like those race prepped ones someone posted about awhile back, they wouldn't fit in a FWD orientation, at least not without some coersion, if at all. Yes I very much enjoy the Tool myself, going to see them for the second time, here in Omaha on Sept. 5th. I thought about naming my Pembroke Welsh Corgi "Maynard" as well, but it didn't fit, I think it suits a yellow lab quite nicely though.

I'm sure you could build an AWD 240 Dono, but you might have to put the engine perpendicular to do it so that you could use the AWD tranny. I'd like to try building an AWD classic but doubt I'll ever do it. I'm sure it could be done but it'd be a lot of work. Supposedly that kid here in Omaha did it to a 200SX SE-R but I never verified that, and he supposedly used an S13 rear end to make it work. Shouldn't say he, whoever he supposedly sent it to in CA to have it done. Supposedly another guy had an SR20DETT put in his B13, but I never verified that either.

Too bad I dont have the funding to try creating an AWD SR20DET S!3 with 400 WHP... the 400WHP isnt' going to take too long to get I hope. Depends on if I am forced to move out or not. (Dad is being an ass about my project and girlfriend) It seems he isn't too thrilled about the amount of power I have in mind for a goal...

Attempting to read this thread has given me a headache. First, please learn to spell, punctuate, and capitalize. It's like reading ebonics. Anyway,

RWD motors have engine mounts in different positions as compared to FWD motors.

US sr20's are 9.5:1 compression, regular valves, EGR

10:1 Primera's have sodium filled valves and no EGR. I've read the cams have 1 degree more lift or are in some way different.

Not all JDM sr20's are 10:1 w/sodium valves, some are 9.5:1 and I'm sure their countless other variations as well.

Most JDM motors are low mileage motors, which could account for better performance.

AWD Silvia/240=custom transmission; the AWD tranny bolts to the sr20det's used in FWD swaps. An AWD Silvia tranny would have to resemble an AWD Subaru tranny for it to even work. Better win the lottery.

what is the advantage of the sodium fill valves?

Originally posted by SCMSER:
Attempting to read this thread has given me a headache.

Then take a pill and go to bed, crabass! :)

Originally posted by NissanGuy01:
what is the advantage of the sodium fill valves?

So Nissan can get more money out of you when you replace them? I'm guessing it helps dissipate heat better, or prevents the valves from even absorbing as much heat.

Toolapcfan,

Sodium liquifies when in motion and, yes, provides cooling. Nothing really special, they've been used by other car manufacturers.

One degree more lift???????

Now YOU'RE giving me a headache. Next thing you'll be saying .035 more duration.

You come out blazing, then shoot yourself on the foot. Not very impressive.