Silvia Club of NSW

What would be the best engine in terms of power gain to replace my SR20DE with?

So far the options are as follows:

1. S15 Autech SR20DE
2. S14 SR20DE with VCT
3. RB25DE Neo from R34
4. RB25DE from R33
5. S13 SR20DE

Honestly, in a perfect world I'd love the Autech one (I went and test drove an Autech the other day, fuck they are a fun car), but I'd never be able to find one. I don't see too many S14 SR20DE's for sale either. S13 SR20DE's are too old. RB25DE's though...there are plenty of those around...

Now I did a search on both here and ns.com, there is plenty of debate surrounding the whole 'weight balance' shenanigans by dropping in an RB25DE...but surely an RB25DE Neo, which makes 147kW at the fly, would be a good option for my S13. And not that expensive either? Remember I'm on P-plater laws, so no turbo.

Everyones thoughts?

With P plater laws can you even go to RB25DE? I thought now.
Since you already have an S13 SR20DE i'd do this:
Cams, extractors, full exhaust, remapped ECU (perhaps with a bigger AFM as well). It'd be fun.
If not then use an S14 DE and do the same things, the SR14 motor would be better but IMHO the existing motor is just fine.
Oh yeah what's with this S13 DE is to old?
How many kms does it have on it?
It's not like they fall apart at 150,000km, if it wore out before 300,000-400,000km I'd be very suprised (actually I'd suspect abuse/neglect).

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1996 180sx
1990 Silvia

i agree do the work neb just told you as the money you will spend converting to another motor means ecu and wiring harness changes and in the case of rb motors you will need to have the whole front cut to get the engine crossmember for motor to bolt in.
that will cost you heaps and the motor will only be stock and have cost a few thousand to convert.
spend that on your motor you have and you will get heaps more power and alot less hassle

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"god owes me a drift car for all the money and time i spent on cars over the years"

I just don't trust any engine that has been swapped out of a car. An S13DE I'd be sus that it's blown or has been mistreated moreso than possibly an S14DE.

That's some good advice though Neb, I'll keep it in mind.

RTA say you can shove in an engine with a capacity increase of no more than 15% of the largest motor available to the car without it being engineered (that makes it 2300cc), as for wether you can drive it is another question all together.
Also obvious engine mods such as extractors, exhausts, pod filters aren't allowed on a P platers car, even though the s14de comes with extractors.

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R31 the dislexics S13

what's wrong with working the current DE you have now?

forget the RB idea completely,it's stupid.

IMO,you have two options.

1. work the current engine,or replace it if it's stuffed with another S13 SR20DE and work that. cams,intake work,extractors & DET cat back exhaust,etc. in short,copy dumhed's car.
2. WAIT until you're off your P's and slot in an SR20DET then.

anything else is a waste of time and money. although seeing as you're possibly not allowed any real mods atm anyway,the question is kind of moot don't you think?


Justin...

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STI - Made in Texas,not Japan.

An S14 DE is a good upgrade. Although i'd stay with the S13 loom, it's a lot of work to get the S14 loom and everything wired up.

A 14 DE with a pod and decent exhaust should make 100rwkw.

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Boost, the substitute for corner speed.

But given the ammount of money and time you spend doing that, wouldn't it just be easier to spend that money making your S13 DE put out 100rwkw?
It'd be alot easier and quicker.
Also with the mods it's easy enough to keep them invisible or nearly invisible.
Cams are obviously impossible to see, a change in ECU mapping is impossible to see and making a set of extractors hard to see would be a piece of cake.
Then spend all your time learning to drive well.

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1996 180sx
1990 Silvia

Why not spend the money on upgrading the suspension, geometry bits, brakes wheels and tyres?

Spend some time learning how to drive a N/A well as suggested.

Then when you are off your P's, shove a turbo in it. Both you and the car will be better prepared for it.

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[≡≡≡≡≡] \silvia/ [≡≡≡≡≡]

NA pwn me...

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If he retains the current S13 ECU/loom/dizzy how is it going to be anymore difficult/expensive at all? I'd say it'd be much cheaper.

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Boost, the substitute for corner speed.

Now there's an idea

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Luxury Sports Tuning
www.phillbenterprises.com
Previous rides:
S12, N14 SSS, A31 Cefiro, B2 180sx, JZZ30, R33, S14A, A31, R34

... because his engine's rooted

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Boost, the substitute for corner speed.

while you are replacing motor put a button or heavy duty clutch in it as it will help initiate wheel spin and wont ever slip when kicking the clutch with only 100kw

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"god owes me a drift car for all the money and time i spent on cars over the years"

If you just need to get rolling again as soon as possible and cheaply as possible the S13 20DE engines still as valid as anything really and a short motor shouldn't cost very much at all. Lot less work and labour to get her all back in one piece.

If you're willing to spend the time and money though, the S14 ones by themselves (without being modified) are of course a marginally better engine. Legally, I don't think on your P's you're allowed to drive a car thats had the stock engine modified, being the cops regard P platers in Sils as something akin to a really tasty, free donut, you'll save yourself a lot of grief by giving them one less thing to ream you for.
Thing with those S14 engines is they make a nice base for abusing the shit out of them with lots of modifications, so when you're able, drop the dollars into it and have some fun later on.