SR20DET out to 2.4lt?

[Zac]

Those dampers and gearbox must be starting to look better :D

[PLAYA]

Honestly, if you're after that sort of capacity, build a KA24DE and chuck a turbo setup on that.
The KA dohc heads are actually better designed than the SR's, shim on bucket valvetrain, lots of companys in the USA make titanium valvetrain components, stainless intake and inconel exhaust valves.
It's certainly not hard to get a KA24DE to rev out to 7500-8000 if that's what you want.
Cranks and rods are forged items standard. The ring lands on the stock pistons can't take much punishment, but again, plenty of companies in the USA offer forged pistons (Arias, CP, Ross etc).
Oil squirters in the block for increased piston cooling etc.

90% of the S13 chassis's in the states came with the KA24DE, and these things built to a moderate level are making 400+hp at the crank, some are pushing toward the 600hp mark on fully built motors and lots of boost.

that means changing the whole running gear set up fromt he GTiR to a ka24, just to get 2.4L, easier just to stroke the SR then do an engine swap.

[edo]

No to put too fine a point on it but the bloke is a clown. With the right turbos & management you can have enough torque to smash a GTiR box to bits with the standard size engine. Nizpro can build him an engine but dont be surprised if they dont want to simply grind the standard crank...if they would bother building a stroker at all.
The SXR engine made 600hp & isnt laggy at all, guaranteed the GTiR gearbox wouldnt last a sprint day with that engine.

[IMOA]

Well I'm glad someone said it.

[psi999]

I was just chatting to a mate in Sydney that had just finished building a S15 for a customer, it had an offset ground crank (2.2L). Made 470hp @ wheels, nice little package.

Though old mate would be much better spending the money on a gearset, then looking at power options.

[PLAYA]

agreed, i agree 100%, i have no internsions of stroking any of my sr's as i think the displacemtn is enough, but the point is the guy wants to do it and will pay for it, even if it is dumb

[edo]

Tell him to ring Simon at Nizpro on 03 9761 1522. Tell him to be prepared to be told its a stupid idea (because it is) & for it to be expensive (because there is a stupid tax).

[The Pupat]

"10 grand"
"Cause that's what it costs."
"Best you go there then."

hehehe

I'd follow edo's advice. Simon will build a strong usuable combination that will work.

[Nero]

Many people will build a strong package I asked if anyone has knowledge of people doing the work in Melb, simply I was asked to follow this through a bit and that is what I am doing, as I would for anyone who asked.
The owner of this car is far from a clown and with no knowledge of a person's credentials nor of their background in motorsport such a comment is unhelpful. It takes little effort to break a gearbox with poor technique/poor starts. This person is unlikely to do either and he has probably used his car for more race miles in the past 4 years than anyone on this forum with a similar car, so he knows it well. The car currently has approx 330kW, he just happens to want more, going further with the std capacity will not help driveability.

[IMOA]

Might be an idea to suggest to him then that instead of looking for a 2.4 stroker he should speak to people with good SR experience about how he can go further without impacting driveability. It's always better to define a goal rather than what you perceive to be the best solution. There's one very obvious solution, particularly for a GTiR, which comes to mind very quickly.

One thing that has me a little confused, for a car which is obviously going to be driven very hard just why does the owner (who is far from a clown) think he knows more than the workshops out there that spend their lives developing SR's who don't like to go beyond a 2.2?

[Nero]

I did not say that he does know more than the workshops nor did I say that this was the best solution. He has spent a fair bit of money developing his car over time and I said that I was following this up on his behalf. I have no doubt that he is also getting information from other sources including the nissan owners club. The 2.4 lt kit was mentioned in magazines I believe, hence his interest. The engine was to be built up as a spare in addition to his current engine.
It was I who suggested that this forum may have something to offer re knowledge of the kits/workshops available and how applicable they are to motorsport.
FWIW my suggestion was to spend on gearbox/dampers and/or find another car and spend his money there.

[edo]

The SXR engine is perfectly drivable, it will accelerate from 1000rpm in 5th without kicking up a fuss, on a circuit it is never off boost. (it has boost from 3000rpm). It makes enough power & torque to totally destroy a GTiR box on a circuit without poor driving. Im assuming a person who has so much experience (sprints no doubt, not races) runs decent tyres, which with the SXRs power will break the gearbox if he so much as bounces off a ripple strip hard enough to break traction.

There have been a few people reccomend one workshop in Melb to ring to build a good SR. I would suggest he rings with objectives not solutions because Simon knows more about them that your mate will ever hope to know. It seems to me Nero that for some reason you dont want to suggest Nizpro...why?

IMHO any kits that regrind std cranks are probably fine for drag racing & street cars where the engine only makes peak power for a few seconds at a time. If you are circuit racing you are making high power for long periods of time (shorter for sprints, where you might sometimes get away with this type of thing), this is much harder on the engine due to both pressure & heat.

[Swifty GTi]

i know the tomei sr22det kit is worth around 8k give or take a bit.... and i only know this because my new silvia has the kit already installed so i cant give many more particulars at the moment.......

it's $6599 for the GTI-R, so yeah give or take a bit

[Nero]

Edo why the poor attitude towards this bloke? Why even say something like 'sprints no doubt, not races', what is the point? There is a ranking of ability or technical knowledge between the two in your mind? Also why say 'Simon knows more about them than your mate will ever know', this is not a play ground spat nor is it a competition of knowledge, it is a bloke who is wanting to spend money wisely and enjoy his motorsport and he deserves respect for having a go if nothing else.
You seemed to have formed a very negative view on a bloke with no knowledge of who he is or what his background is. As I said I was following this up out of courtesy as I would for many people (including you or other PF users). The guy want to develop his car, if he wants to try something different then good luck to him, its not your money or reputation on the line.
Re Nizpro, you obviously have a commercial connection to them, but your conclusion of my views is incorrect and inaccurate. I did mention them first up in the conversation with this bloke, he did however want to have a choice of workshops hence the follow up on this forum.
I have visited 6 race engine workshops in Melb in the past 1.5 weeks and what it has simply shown me is that there is far more happening around the place than any one person knows about and that what is reported in the magazines does NOT represent a very good picture of what is possible or who is necessarily doing good work. I respect the range of opinions and experience of people on this forum and that is exactly why I posted this query.

[jmac]

I'd second (or third whatever) the recommendation to talk to people at Crankshaft Rebuilders. I haven't had squat to do with them recently, but it'd be hard to imagine they magically went from top shelf to anything less in the last couple of years, so as such they'd be the first port of call if I was in your shoes.

John McKenzie