S15 Owners needed

[lazyfcker]

I found a great deal on a s15 motor, so i have been thinking about doing this. I already have the redtop in my s13. I already know about the wiring problem, speed sensor...etc. (i will be using the s14 transmission instead to keep from having those problems. So for the people who did this swap already i heard i need a new cold pipe for my greddy fmic to work is this true. and if i go with the s14 transmission will i need to have a custom driveshaft? Anything else i need to know that hasnt been spamed everywhere. Or any good links yall might have saved somewhere. thanks

[AJ1356]

not sure about the cold pipe from s13 to s15 but i know s14 and s15 are the same. for wiring i send mine out to get done, came back plug and play. if you have the diff then you wont have to worry about the speed sensor , cuz the speed sensor is there and all one needs to do is extend the wires. the only reason that i know of , for getting a custom drive shaft made is, the s15 transmission yoke is different than the rest, and the drive shaft a bit shorter , se one has to take it to a drive shaft m,aking shop and get a custom one done , costs 300 bucks. let me know if you have any more questions. i think i am the only person here with a s15 engine that runs. i'll be glad to help

[lazyfcker]

well, if i go with the s14 transmission, i can just use the speed sensor from the transmission then right? did you stick with the s15 transmission, and use the rear end? i have the basic 240sx model nothing special would i stil need to see a shop for the drive shop. how did you go along with that part of the swap, thanks

[rkreimer10]

if you are serious about doing this i believe heavythrottle.com has performed this swap succesfully. (not sure how many times. but im sure jeff can help you. dont know if he has the parts in stock to finish your swap but id give him a call.

[AJ1356]

when i was doing mt swap i called them they were not of much help, actuallt yuri from wiring sepcialties was more help.

i used the s15 transmission , why else would i go for the s15 swap if not for the six speed transmission if you use the s14 transmission then you should be able to use the s14 speed sensor. the whole thing with the speed sesor is that if the s15 ecu does not recieve a speed signal it acts wierd something to do with variable valve timing. if you use the s14 transmission then technically you should not have to make a custom drive shaft, the reason one has to make a custom drive shaft when using the s15 transmission is the difference in the yoke and the s15 drive shaft being shorter due to s15 having a shorter chasis and the six speed transmission is a bit shorter than the 5 speed one thus the whole modification of the transmission mount if you use the s15 transmission. very easy to do. and as far as the basic 240 goes the chasises are the same so it wont matter if you are using a basic 240 or a SE . there is not much info on the net about s15 swaps but the other info you can just search for it good luck with whatever choice you make.

[sr power]

lemme ask you this? why would you want the s15 over the s14? the only difference is the turbo and the transmission. imho if your not using the 6 speed your wasting time and money. and the turbos are the same size, the s15 is just ball bearing. personally i think your running the best sr20 already if your gonna mod it. the s13 has high port heads for one. and if you go with cam gears, your gonna have to ditch the cam phaser. and odds are your gonna upgrade injectors to at least 550s, thus making the 440s in the s14 or 15 useless. and i'm sure your not gonna be happy with the t28's performance and want to go bigger and better. so the question remains....if not for the 6 speed...then why?

[lazyfcker]

so if i go with the s15 transmission, no matter what i will need the custom driveshaft. Being its going to be hard for me to get my hands on a decent priced s14 transmission im prob gonna stick with the 6speed with the rear diff(is it ok if i just use the diff and not the axles, i have the 5 lug and j30 parts in the rear) I'm almost getting this motor for nothing thats why.

[sr power]

your gonna need axles too. open diff axles won't work with a limited slip diff. so you'll have to get your hands on J30 axles as well. however. you can use the axles you have if you get 6 bolt limited slip output shafts. but to my knowledge the J30 axles are stronger

[AJ1356]

not sure about the s13 output shafts but for the s14 they are 6 bolt so you can use the stock s14 one with the s15 diff , mine works just fine.

[r1jlewis]

I've had my S15 swap for about 2 years now in an S14 chassis and it's been almost pretty good to me. If i had to do it over again i would stick with the S14 cause S15 knowledge is hard to come by. Plus the 6speed is not as strong as the S14, but if you don't plan on going crazy with it, then it will be alright. The S15 speedo must also run thru the ABS module which converts something ?? but still reads out kilometers. That's why i just used the S15 guages and read it in kilo's, which i don't pay attention to any ways. I know a guy down in miami that know all about the S15's. He helped me with mine. If your near florida, you can come look at the wiring in mine cause it's done correctly.

[lazyfcker]

so even though i have the j30 lsd in, and im going to dbl check to see how many bolts mount up to the diff, cuz i never really payed attention. but in order to get the s15 diff to work i will need atleast 6 lug to bolt onto the diff correct?

[r1jlewis]

i'm not about the 6 bolt situation. I do know that the S15 rearend had a different ratio that the others because of the 6 speed transmission. I'm not sure what it was though, but i have heard that it doesn't make that much of a diffrence. I remember going thru the traps redlining in 4th gear.

[lazyfcker]

so being said if i dont have the whole s15 rear end, i should just use the s14 transmission hooked up to my j30 rear, to keep my speed sensor, and trouble.

[r1jlewis]

I have heard that you could use the signal straight from the S14 transmission and make it work with your stock cluster, but i haven't tried it my self so can't confirm it. This is what the S15 FSM says though.

SPEEDOMETERNMEL0042S04The combination meter provides a voltage signal to the ABS control unit for the speedometer.The voltage is suppliedI from combination meter terminal 14 for the speedometerI to terminal 11 of ABS control unit.The speedometer converts the voltage into the vehicle speed displayed.

[r1jlewis]

OK, maybe my pic will work this time!

[lazyfcker]

i dont think i have abs though

[r1jlewis]

Nope, you don't and either do I, but the ABS module still had to be hooked up for the signal. It's just the ABS output's aren't used since our's don't have that.

[lazyfcker]

oh ok good deal

[AJ1356]

dude just call me and i'll explain everything, it would be much less confusing for you. 510-921-6575.