s15 SR20DET swap
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Joined: Dec 2003
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s15 SR20DET swap
I've read that the s15 SR20DET swap is very complicated to be put into a s14. What are the overall difficulties of this swap? I'm new to the 240 scene and will be getting my first 240 sometime early next year. My goals as of right now would be the s15 engine swap and front end conversion. Money is not a huge issue and I work at a shop with access to a welder and all the tools needed to probably pull off the conversion.
If anyone can lead me in the right direction to see what is all involved in the conversion, i would greatly appreciate it. I did search and i could not find any detailed information on what makes this conversion more complicated then the s14 SR20DET JDM swap.
If anyone can lead me in the right direction to see what is all involved in the conversion, i would greatly appreciate it. I did search and i could not find any detailed information on what makes this conversion more complicated then the s14 SR20DET JDM swap.
Last edited by MwGSR; Dec 21, 2003 at 12:02 AM.
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Joined: Jun 2003
Posts: 8,440
From: Harrisburg, PA
I got this from srswap.com
Here's a link to the whole page in case you want to look at it
Required Parts for the install:
Engine, S15 6 speed transmission, S15 driveshaft, S15 differential, S15 speedometer, alternator, starter, power steering pump, Crank Angle Sensor, ECU, harness, MAFS.
Fitment:
The engine and transmission will fit into 95-98 S14 US 240SX chassis with minor modifications to the transmission mounts. The differential is needed as the speed sensor is located there.
The S13 chassis requires more work. The driveshaft has different mounting location from the S14 / S15 chassis. Custom work must be done.
Engine, S15 6 speed transmission, S15 driveshaft, S15 differential, S15 speedometer, alternator, starter, power steering pump, Crank Angle Sensor, ECU, harness, MAFS.
Fitment:
The engine and transmission will fit into 95-98 S14 US 240SX chassis with minor modifications to the transmission mounts. The differential is needed as the speed sensor is located there.
The S13 chassis requires more work. The driveshaft has different mounting location from the S14 / S15 chassis. Custom work must be done.
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Joined: Dec 2003
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I read that page and the only modification that it list is: The driveshaft has different mounting location from the S14 / S15 chassis. Custom work must be done. Any one have any more information on this?
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Joined: Mar 2003
Posts: 10,109
From: Pasadena,ca
THis is just wut I heard and no real hard fact.
The S15 swap really is a PIA. Not only will You need to do a driveshaft modification, but u will also need to get a whole S15 rear sub frame because the the speed sensor is in the differential itself. So you will need to modify the rear frame of the S14 and MAYBE modify a few things in the engine bay. The wiring will be a b*tch and a half man, the S14 wiring is all ready pretty complicated as is...and to get everything or almost everything to work properly will take lots of Research and TIME.
Thats what I basically have gathered on this swap..Just passing along the info. ONCE again this is not hard fact. If you were to go threw with it that would be great, Hands on experience is a lot better hten hearsy. Good luck
The S15 swap really is a PIA. Not only will You need to do a driveshaft modification, but u will also need to get a whole S15 rear sub frame because the the speed sensor is in the differential itself. So you will need to modify the rear frame of the S14 and MAYBE modify a few things in the engine bay. The wiring will be a b*tch and a half man, the S14 wiring is all ready pretty complicated as is...and to get everything or almost everything to work properly will take lots of Research and TIME.
Thats what I basically have gathered on this swap..Just passing along the info. ONCE again this is not hard fact. If you were to go threw with it that would be great, Hands on experience is a lot better hten hearsy. Good luck
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Now its starting to sounds more difficult. 
Has anyone on this board actually done the swap? I'm going to have to do some more reasearch on what all is involved. Just seems like there is not a good amount of information on this swap. I have done many Honda swaps, but this sounds like a much bigger project. If you have any more websites with information on the swap please lead me in the right direction.
Mike.
Has anyone on this board actually done the swap? I'm going to have to do some more reasearch on what all is involved. Just seems like there is not a good amount of information on this swap. I have done many Honda swaps, but this sounds like a much bigger project. If you have any more websites with information on the swap please lead me in the right direction.Mike.
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Joined: Mar 2003
Posts: 10,109
From: Pasadena,ca
I dont know of ANYONE at all in the states that has done the S15 swap. A lot of people wanna do it..but when they hear what is needed they would rather go for a RB or a S14 SR. It is very hard and time consuimg swap I would belive, with all the work needed. And I dont know of any sites that has info on it. You can try other forums, like NICO or FA to see if you can get some more info and share with us
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Wow I didn't realize that this swap has possibly never been done in the states. I knew it was a rare swap but i didn't realize it was this rare. Since there is very minimal information on this swap, I think its going to be pretty difficult to pull off. I have some time to reasearch and figure out what I want to do. If anyone has more information to add, please do so. The 240 wont be my daily driver, so I would have a lot of time to preform a swap.
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Joined: Sep 2003
Posts: 13
We did one of the first S15 swaps into a 240sx. PIA if you ask me... Everyone here pretty much got the issues right, then theres the wiring issue...SUX ***!!!!
I would rather go S14 and spend the money on upgrades..... Or you can always go RB.
I would rather go S14 and spend the money on upgrades..... Or you can always go RB.
Contributing Member
Joined: Dec 2002
Posts: 578
From: Arizona
A customer of mine has completed the swap and done the wiring up 100%. He is offering the services now to swap S15 engines and supply the harnesses etc... The install itself he said was not a big deal...the wiring was his hardest thing, but I would definately recommend paying someone like him to do it before trying it yourself...unless you like a lot of headaches.
Night
Night
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Joined: Dec 2003
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I've been doing alot of research and I realizied I could do the RB26DETT egine swap for near the same price. I think i'm going to head in this direction now. Overall its a much better engine and there is a lot more information on this swap. I'll be searching for my 240 in feb when i'm ready to purchase. Untill then i'm going to continue to research the RB26DETT. I'm really hyped up about building this car. What websites have good deals on the engine or clip?
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Joined: Dec 2002
Posts: 578
From: Arizona
I supply engines....I have two RB26DETT front clips on my next shipment scheduled to arrive late January/early February. I can also get the 5 speed transmissions from the RB25's, oil pans, etc...
Night
Night
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Joined: Sep 2003
Posts: 27
From: SoCal
You posted that money was not a big issue in one of your post. That could explain wanting the S15 SR or RB26. Well anyway if you are interested in something big in the near future you should get a hold of VRTgrumpy he has some things coming you may be interested in. Shoot him an e-mail or call and ask what motors he has coming. Well I guess I can give a hint.....well 28 and 30 might give you an idea. But then again you could always just do the 25 and build it up for the price of the 26. All up to you and what you plan to invest.
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Yah money isnt a huge issue at this point. I've read on another forum that a company has made a mounting kit for the RB26 which allows you to keep the twins and its pretty much a drop in job. The wiring would still be a complicated job though. The firewall needs to be modified slightly and thats the only major modification needed. I'll have to read up some more on that. So as of right now i'm leaning towards the RB26 w/ RWD. And if not possibly a RB25 with a bigger turbo. Read below from which i quoted from another site.
Yes the RB26DETT will fit into the 240sx with some mods....
First is you have to make the RB26DETT RWD only, that means changing oil pans, oil pick up, and going to a RB25DET tranny.
Our kit (Which can be bought from Underground-motorsports) will allow the motor to fit in correctly, shifter to sit in the stock location, and allow you to keep the twin turbo set up. Plus enoght room to keep the A/C if you want.
The kit can be bought complete which will turn this swap into a drop in kit. It can take the average guy with help a weekend to do this swap.
The ONLY mod needed to do to the 240sx is a small dent in the firewall to make room for the starter. I can post pics if you want or come on down to the shop and I'll let you look at the car. Also you can see the S14 with the RB26 with a T-78 on it.
This is a drop in kit. No need to cut or modify the 240sx body or frame at all.
Grumpy
First is you have to make the RB26DETT RWD only, that means changing oil pans, oil pick up, and going to a RB25DET tranny.
Our kit (Which can be bought from Underground-motorsports) will allow the motor to fit in correctly, shifter to sit in the stock location, and allow you to keep the twin turbo set up. Plus enoght room to keep the A/C if you want.
The kit can be bought complete which will turn this swap into a drop in kit. It can take the average guy with help a weekend to do this swap.
The ONLY mod needed to do to the 240sx is a small dent in the firewall to make room for the starter. I can post pics if you want or come on down to the shop and I'll let you look at the car. Also you can see the S14 with the RB26 with a T-78 on it.
This is a drop in kit. No need to cut or modify the 240sx body or frame at all.
Grumpy
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Joined: Sep 2003
Posts: 27
From: SoCal
Grumpy is from Mckinney motorsports. I have seen the kit he is talking about. Pictures were on one of the forums cant remember which one. They also do all the wiring for a plug and play kinda setup and I guess some others are going to be out soon but as of now they are the only ones I know of that actually sell everthing from install kit to complete harness.
