S14 SR20DE non turbo into S13 chassis...

[sileightysomeday]

Ok, So I want to go NA SR but the S13 SR20DE just isn't powerful enough. I just had a few questions and YES, I ALREADY SEARCHED. is the S14 a direct bolt on into an S13? I've heard many people doing it and it just bolts right and then I'd just send off the harness to get done and then modify the heater hoses to work. mainly Im interested to know :1. will the S13 KA driveshaft bolt up to the S14 SR transmission?2. will the gear ratios of the S13 differential be compatible with the S14 transmission? 3. Will I be able to run A/C with custom lines? 4. are most/all parts from the SR20det adaptable without modification( clutches, flywheels, injectors, pistons, rods, etc...? 5. If i decide to turbo later would i be able to just buy the stock S14 turbo parts and swap( i know the DE has a higher compression ratio)? and would i be able to boost at stock levels on the higher stock DE pistons? 6. Is the VTC noticeable like VTEC or is it more subtle ? ( is it worth it?)7. Will the KA coil work with the SR20DE cuz it has a distributor?

Thanks for any and all help. to give you some insight to what this is going into i have an '89 coupe that I've done the SOHC to DOHC swap in so the wiring for DOHC and the P/S lines are done. i've also done a 5spd swap. and the engine im speaking of getting is an S14 SILVIA SR20DE non turbo notchback.

[SpeedRacer1]

1. will the S13 KA driveshaft bolt up to the S14 SR transmission? Yes2. will the gear ratios of the S13 differential be compatible with the S14 transmission? Yes, same ratio's as S133. Will I be able to run A/C with custom lines? Yes4. are most/all parts from the SR20det adaptable without modification( clutches, flywheels, injectors, pistons, rods, etc...? They should be, if you use a DET clutch you may need a DET flywheel5. If i decide to turbo later would i be able to just buy the stock S14 turbo parts and swap( i know the DE has a higher compression ratio)? and would i be able to boost at stock levels on the higher stock DE pistons? You can turbo the NA engine. On stock boost levels the engine should be fine. My old shop did this on an extra S13 NA, it felt good.6. Is the VTC noticeable like VTEC or is it more subtle ? ( is it worth it?) VTC is nothing like Vtec, VTC is a slight change between 1500 and 5700 RPM's and is mean to increase low to mid range torque. It shuts off at higher RPM's.7. Will the KA coil work with the SR20DE cuz it has a distributor? I dont think so, if I recall the S14 SR has a distributor/coil setup similar to an S14 KA, so if you use any KA parts try the S14 parts first because the S13 SR and KA parts wont fit.

My friend and I did one of these in a day including wiring. Car drove in with a KA out with an SR.

[sileightysomeday]

Wow, that's the most helpful anyones been for me here so far, Thank you so very much. I forgot one more question. right now i have a test pipe and a catback on my S13 will the Stock S14 SR header bolt right up to that? Ive ordered the engine and it should be here by the end of the week. could you tell me about how the car ran after the swap? I'd like some details and what to expect. Im sending my harness out to wiring specialties so my swap will take at least another few weeks becuase i have to wait for that. Unless you recomend doing the wiring myself? I've done swaps before and done the SOHC to DOHC wiring but never done SR wiring. Thanks again.

[white90esex]

if you end up doing the swap get back to us on how you like it.

I was thinking of going NA sr in a 510.

Anyone know anything about the S15 SR20DE? I think I read somewere that it actually makes 175hp. That would be a cool motor to put in an S13 or something.

[SpeedRacer1]

The S14 SR ran great, one thing I cannot remember exactly what happened but we had a problem with the header. I dont remember if we had an S13 upper half and S14 lower half or vice versa but it did not fit. I am pretty sure you will want the full S13 header to fit the exhaust properly.

The guy was into drifting and was good with the sohc ka, he did good when he had the SR too but we ended up swapping in an R34 RB25DE NEO anyway later on. He liked sticking NA and wasnt paying for the engines or labor anyway.



As for NA SR's, if you can definately try to get an S15 SR20DE out of an Autech S15. They are rated at 200 hp. And with the OEM red valve cover and header it looks pretty nice. There have been a few on ebay in the past few years.

[sileightysomeday]

My new engine is on its way! I thought about something. do you think the coil out of the SR20DE out of the '95-'98 200sx SERs would work? the swap im getting doesn't include the coil so im trying to make sure. im ordering a few things before the engine gets here so i'll ready including:1. Jun lightweight flywheel2. exedy OEM style clutch3. motor mounts4. Radiator ( but i want to run the stock fan until i can afford electrics)

what do you guys think of the JUN flywheel? it's 5.3 KG which is about 11.7lbs. I autox twice a month so i think the exedy OEM style clutch would be ok since im running a pretty much stock engine. for the motor mounts i'm deciding between cusco and nismo what are the differences? i want at least a polyurethane mount cuz i don't want to have to replace rubber later. and lastly, about the radiator i know the SR's have the upper hose on the other side so i was thinking a KOYO rad made for the SRDE. since it's thicker would i be able to still run the stock fan until i can afford an electric setup?

I like NA setups more than turbo setups because I autox. my cousin has an Sr redtop in his hatch and it's fast but i dont' like the way the turbo kicks in especially in the middle of a turn, im not saying i don't like turbo cars, but just for autox NA seems like my cup of tea.

[SpeedRacer1]

I know the part numbers do not match for the coils so I cant say whether or not the coils transfer over, I wouldnt be shocked it the did.

I dont have experience with the Jun unit, my friend has a lightened wheel on his SR, it revs quite nicely, very quick.

I have Kazama motor mounts and by far it is the least streetable part on my car, the Cusco's look pretty similar to the Kazama's so chances are they are just as rough. If this is a daily driver by any means I would suggest the Nismo mounts, they feel just about stock (and look like them too) and they will do fine over old, worn out mounts. The Cusco's will shake your car a lot.

The radiator should be the same as a RWD SR20DET, FWD SR radiators dont fit if that is what you are asking. If you plan to auto x then you could try a stock or copper core radiator and see how it does. For drifting the airflow is cut at times and a larger 3 row radiator is necessary. Just make sure you get it for the DET, its the as the RWD DE as far as where the hoses are located.

Depending on the thickness you may or may not be able to run the clutch fan. OEM Electric fans are always an option. You can get some from any car, that car in the pic above hade electric fans off of a Ford Taurus and they worked fine for his SOHC application.

You shouldnt run out of room for the clutch fan, but if the blades are close to the radiator then you may want to remove the fan because under higher rpms the blades will move closer to the radiator and strike it.

[sileightysomeday]

I found a header for an S13 SR20DE but I don't think it'll clear the USDM steering column. Do you know of any aftermarket headers that will clear the USDM steering column and bolt up to the SR20DE ? could a machine shop customize it? or would I be better of having a custom one made from scratch? thanks.

[SpeedRacer1]

The oem header will be close but it should clear with no problems. Otherwise you could always install the upper pipe and have the lower pipe fabricated.

[sileightysomeday]

the OEM S14 header? or OEM S13 header? i found this really nice used aftermarket S13 SRDE header and I want to get it, but if it doesn't fit, im screwed. the header problem is stressing me out so much that Im almost tempted to scrap the project and get a CA18DET. also, I've heard the stock CR on the S14 SRDE is 10.1:1 or 10.4:1 could someone confirm this? since the CR is so high, i guess i couldn't just buy a Stock turbo off an SR20DET and slap on the manifold, turbo, downpipe, etc.... could I ? or would that blow because the stock CR is so high? thanks.

[SpeedRacer1]

The header may not clear depending on where the collector is located. The OEM header fits properly shouldnt hit the steering column, I cannot remember which fits right (S13, S14?).

S14 & S15 NA SR's have a compression of 10:1, S13 NA SR's have a compression of 9.5:1.

Here's a useful chart...http://www.nissansilvia.co.nz/...e.htm

[sileightysomeday]

SpeedRacer1, You're amazing. Its been so hard for me to get info on the S14 SR20DE and you've been very helpful so far. hopefully this weekend i'll have time to install it and see if the header fits without hitting. im ordering flywheel/clutch/motor mounts and im just waiting for those to come in before i do the install, then i have to send off my wiring harness. Thanks for the chart. by the way, was the wiring easy? or should i just send it off to wiring specialties? Thanks.

[sileightysomeday]

also, if you have any more detailed pics of the swap that would be great, like wiring, closeup of the header/steering column, and other things I might need to know just in case. or any other problems you guys encountered. Thanks again.

[SpeedRacer1]

We didnt take may pics of the car or any of the process. We were in a hurry that day.

The wiring is pretty simple and can be done in about an hour but I do not remember exactly how to do it anymore. The wiring should be the exact same as an S14 SR20DET into S13 though I will ask my friend who does the harness' later.