s15 spec s turbo conversion?
i wanna go down the spec s route and do a turbo conversion on it...
the usual "what's involved" question next i guess. i know the sr20de
has weaker internals than the sr20det, and that ill need engine, turbo,
mani, elbow, downpipe, engine loom, ecu and fmic/wmic.
anything else though? can anyone give me a shopping list or have i
it nailed with my list above?? anything i need to watch for?
sr20de gearbox ok?
sr20de dash loom ok?
sr20de engine mounts ok?
any help appreciated
"If you don't fight for something, you'll fall for anything" - The Wise Man
What's your reasoning for buying the S over the R bud? By all accounts to get a spec-s to the spec-R financially you may aswell buy a spec-R from the off.
If its a project then fair play, not just the engine to worry about the R is different chassis wise, etc too. I'm probably not the best person to give you the full run down but not sure it's as easy as bolting a blower on there!
simple, because i can only afford to buy a spec s. there is a huge price difference (3k as apposed to 7k) i never said im just "bolting on a blower" so maybe you should re-read my first post if thats what your thinking...... fitting an sr20det to a spec s is cheaper than buying a spec r. its not a track/drift car and its not going to be 400bhp. so im not making much of a fuss about chassis and other spec r extras. i just want to enquire if i need anything else than listed above to do this conversion.Originally Posted by Mike-R
"If you don't fight for something, you'll fall for anything" - The Wise Man
what i would probably do is id buy a sr20det engine with a gearbox. Im sure there are some wiring specialist on the internet you can contact to ask about the looms. Not owning a s15 or knowing much about them i would take an educated guess that the engine mounts will be the same due to the engine being almost the same bar internals and turbo. (just an educated guess so don't want to be slated by sr20 experts). If I'm wrong I'm sure someone will put me right though.
Don't forget brakes and suspension will more than likely need a seeing too due to the extra power.
Also why don't you do what I'm doing, i originally wanted an s15 spec r but due to the costs I'm going to get an s14a. basically the same car.
Add in a brake upgrade Neelie
Doesn't the Spec S only have twin piston front brakes?
I remember Colin (Trials15) upgraded to JP's standard s14a brakes and found a big difference in them.
So if you're adding moar powarz, you'll want better stopping power
^^^ thanks col! yeah brakes and fuel pump i forgot.
do the s14 brakes just bolt on? caus thats something i can do anyways before the conversion
"If you don't fight for something, you'll fall for anything" - The Wise Man
from what i have been told and read, most parts are interchangeable so i would assume that yes they will bolt straight on
My tone was not of condescension dude, merely trying to help. This thread you might find handy a lad has done a full conversion using a 14 doner car. Hope this helps.
http://forum.s15oc.com/showthread.ph...pec+conversion
sorry mike if i got you all wrong there. sometimes the internet isnt the best form of communicationapologies again!
thanks for that link!
"If you don't fight for something, you'll fall for anything" - The Wise Man
Unless your going all out and doing some major shell work, super spec engine, all new suspension and braking. Then just save up the difference to get a spec R
The insurance fro a Spec S converted to a Spec R is silly money!
Once you have factored in engine, gearbox, harness, ecu, suspension and brakes to bring to close to the Spec R (you won't find anyone wanting to sell the extra strengthening parts) It will cost you more than a Spec R
x2 Insuring a converted non turbo S15 will be a painI had awful trouble insuring mine because it was "modified" and I wouldn't imagine it would have been too easy if I ever got around to converting it!
If you do go ahead with it the brake upgrade is a must, I got front & rear calipers from a 2001 200SX touring with matching pads & discs. The rears were the same as the S but it kinda suited because the full set was cheap and I could get them all refurbed while the car was still on the road! From memory the only changes were to the dust guard as it was a bit small (it straightened out enough to fit the bigger disks rather than having to replace it) and I needed longer brake lines at the front - but I had ordered a set of S14a braided lines from RHD Japan which may have been why they were a little short.
As for the chassis; I'd ARB's and strut braces front & rear with a full compliment of alignment arms, Nismo suspension bushes & DW CS2's and the feedback / grip was unreal on the road & track
And still is
Not sure about that, i know its not the best example but my mate changed engine in his saxo from a vtr to a vts and was only around £100-200 extra declated on adrian flux and he had points and a claim.
Id get a quote if you want to do it the legit way from an insurer but saving an extra 4k to make the difference up to a spec r is a bit mad and i know if i was saving for a car and then had to save the same amount up again and a little more it would never happen. you could get a nice 14a for 3k mate?
The cheap but less reliable way would be to use the loom, head, ecu and bolt on A manifold, turbo intercooler and get a det block and a mapper able to make up custom chips and not blow your engine to pieces.
In case anyone is wondering I have this setup on my 14 and it works and has done since the work was carried out. I will point out that this is the cheap option and will set you back maybe £1500 all in depending on a few factors oh and ignition will not be up to par with the foil packs but for your needs would work fine, last time I was on the rollers I made 220 bhp. This isn't the best way but it can work, just another option
doing this exact conversion now... you got the list done in your first post but from what ive heard the de box is "aparantly" weaker, if your not running big power or drifting it id say you should be fine. im bringing everything over from a well speced 14a and doing an engine rebuild plus posh bits at the same time so no big hassle as they are the same chasis.. spec-r just has extra braceing which im sure if youve never had then your not gunna miss it, just fit strut braces and thicker arbs if your that bothered or even a cage. got a type-r spoiler for sale if your interested tho haha
Woods; Car insurance is very different in Ireland, (http://www.sxoc.com/vbb/showthread.p...ead&highlight=) premiums are substantially higher & getting insurance on a standard Silvia is difficult. A lot of companies refuse to cover jap imports and of those who do some refuse to cover Silvia's. Of the few who are left some will turn you away if it is modified at all so a modified Jap imported S15 with an engine transplant will be a nightmare to get cover for
Last edited by Trial_S15; 17-01-2012 at 12:18.
Neelie, been doing this conversion myself with a mechanic buddy since xmas was looking fora spec r but the ones I saw were rough as hell so decided to get a clean spec s and convert it ended up buying a zenki donor car but what you need would be propshaft, front brakes, engine, loom, ecu then theres the wiring you will need to strip some of the spec s loom for abs and a few more bits pm me with any questions I'm from north Cork myself so know a lad that would do all the work if you were interested for handy money! Only getting my car back early next week and I'm much happier I built a spec s instead of buying a spec R keeping an eye for someone breaking a spec r for the extra bracing but have front and back strutbraces to go in and new coilovers so not too bothered about handling Its a 15 at the end of the day Im not gona be pushing it to the limit!
Also remember that the rear subframe in the 15 is stronger. Has extra plates and bracing.
I have considered buying a spec s and doing this conversion so many times, my calculator battery is flat!!!
Every time I spot a nice spec S i do the sums, and i can never justify the spend to modify and still not have as agood a car as the R.
After the engine, loom, gearbox, prop, diff, 5 stud hubs. brakes, exhaust, labor and not to mention the wait and DIY time.................. i always thought i would have saved maybe 1k at best. And TBH, from my experience of cars 1K is a cheap price to avoid all the blood sweat and tears!!
I have myself written this thread more than once so i know its the last thing u want to hear......... But....... just buy a spec r!
My 2 cents anyways.
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