S13 Sprint/Time Attack Style Build

[No Crust Racing]

Much obliged. 

And good timing too because I have got some tasty parts arriving for this new engine

[GTofuS-T]

1 hour ago, PranK said:

Moved to projects and build ups.

 

I was wondering why the "Get new comment" button was taking me to the first page!

[PranK]

13 minutes ago, GTofuS-T said:

I was wondering why the "Get new comment" button was taking me to the first page!

You just need to read it all again.

[No Crust Racing]

Attended Wilby Motorsport Park for Round 4 of our series, round 5 is also there in 6wks or so.

It's a very short course with laps ranging from 32-40sec. It's a bit agricultural, but the vibe is fairly relaxed. 

I went on my old 235 RS-Rs to see if I could have a class win on those and save the AR1s. I forgot to turn the camera on which is shame as I almost died a number of times in that first session, to be fair it was cold but my god the lack of grip was hilarious - did a 37.7 or so and was .7sec behind the class leader and not overly confident I would catch him - swapped back to the AR1s after the first session.

Ran a 36 flat in S2 then squeezed a few more tenths out of it to run 35.7 in S3 which was good enough fro a class win and a top 10 outright finish. Sat out S4 as the 2nd place car had mechanical issues after running a mid 36 and 3rd was too far away to catch me - was nice to pack up and be home earlier. 

Tried a new breather setup which looks like a hot mess due to piping length etc, but is finally keeping oil in the car with only minimal oil accumulating on the lip above the firewall from the breather. 

It's now 2 stage with rockers/balance pipe all Tee'd and into 1 port on a baffled can with sump drain, outlet from that can feeds another baffled can with an filter to Atmo.  

I now have the rev limit warning set 6700 rpm as torque starts falling away then anyway and it limits how much oil is being pumped to the head. Oil surge is still evident on quick direction changes, but I'm guessing it's always had it.

If I manage to win the remaining 3 rounds I'lk have had 10 straight wins in my class, which will be a fitting send off for the CA, if it doesn't die first. 

Bought a balancer for the SR and have been looking at clutches and manifolds - went ATI in the end. Was told my shipment of the main group of parts (pistons, rods, head gear, studs etc etc) is just about ready to ship and my head studs were just picked up from Mazworks - they're only ARP, but apparently they have a custom length that bottoms out properly that people swear by so I grabbed those. 

Started test fitting the passenger seat, just need a few locking nuts etc. 

As always, here's a hotlap in 1080p and 60fps including a little B roll footage. 
 

 

Edited June 6, 2018 by ActionDan

[No Crust Racing]

Things starting to trickle in.

[admS15]

It begins. So, did you decide on an engine builder?

[No Crust Racing]

I'm still trying to get some objective reviews.

It's difficult as nobody locally specialises in SR20 and that makes it hard to walk into a workshop and get a feel for the place.

I'm also keeping in mind I'd always wanted to do it myself, with assistance from a meticulous mate of mine who builds motors as part of his work (albeit diesel), but the cost of getting it wrong adds up quickly.

I realise there's rarely, if ever, a warranty on a built motor though.

[admS15]

All very good points. If your buddy knows what he's doing and sticks to the recommended clearances, shouldn't really be an issue but i see where you're coming from and for the sake of an extra K or 2, may be better to just pay up.

If you decide to use a workshop, ideally you would want one with ample sr20 experience. Not sure if you have a local sr expert up there. There's a couple of shops here in Melbourne that pretty much specialize in them.

Rob from Sabbadin automotive and Donny from forced motorworx both come to mind as SR gurus and have built that many they could probably do it with their eyes closed.
They're the sort of guys id be considering if it was my engine. Food for thought, im sure you'll work it out by the time the rest of the parts turn up.

[No Crust Racing]

Bit more than 1-2k really given some of the quotes I've had (though they include assembling/clearancing the head, all machine work etc). 

The only person who's jumped out at me so far as having genuine SR20 Circuit experience (rather than street/drag focused) is DM Motorsport, the one who owns that SuperGT S15. He claims to have acquired the testing data for SR20 race engines with the car and a few other insider secrets. He has shared a few things so far that line up well with some of my own research into weaknesses/how to avoid etc but he is far from cheap and he's in Sydney. He's given me a reference, but as with any business, I'm sure that reference will only have good things to say. 

Sump is here. Got the aeroflow one, plenty of capacity, trap doors etc. 

[No Crust Racing]

A bit of stuffing around with harness lengths and the inner eye bolt position on the inner mount but got there in the end.

The side holes are smaller on this seat and don't allow the buckle to fit through the hole nicely which is an issue as the lower strap portion is too long and sits too close to the eye bolt to be tightened safely on the inner.

I ended up having to mount the eye bolt further forward and on the seat mount itself rather than the rail. It seams to snug up nicely but we'll see how it goes at the track.

Sits a bit higher than I'd like but I sit high in a seat compared to mates, should be fine for the missus, will test later.

Total weight is approx 13kg vs say 20-22kg or so that the Falcon's Autobarn buckets are.

[No Crust Racing]

Delicious

Part of the order was wrong so I'll have to sort that.

Collection for the main bits was organised for tomorrow.

Can't wait!

[admS15]

Nice, so did you decide which way you're going with the engine builder?

[No Crust Racing]

Yeah I think I might have.

Have come across an SR circuit engine guru in Sydney.

See how we go

[No Crust Racing]

Chipped away at the donor, think I found what happened to it lol

Bores all look good, that is a deposit on the bad cylinder, not pitting etc. 

Head is in very good nick and will be sold off. 

Got an awesome new work light for my birthday, thing is ridiculously versatile, cant wait to use it.

Main shipment of bulk parts is on the way from NZ!

 

[No Crust Racing]

I've seen plenty of eBay gears and I will admit these appear to be better quality, 3x the price worth? Probs not.

[No Crust Racing]

A big box of goodness arrived.

[No Crust Racing]

Did half a track day yesterday, packed up early as I had set a decent time in first session and spent the second mostly off the track.

Really struggling to get the brakes up to temp and working, even with the ducts covered.

Taking me 2-3 laps (35-37s laps so only short track) to get them warm.

Only have a small tyre window by that stage as they are going off sooner as they age.

Attacked a witches hat and had to bend the winglet flat. I was going to lose those in the V3 splitter anyway.

We found out the the trailer I borrow had damaged stub axle..

Thankfully that happened at home 0_0

Class win, no PB.

[No Crust Racing]

Scratch that. 3 tenths improvement in PB the official timing shows.

So that camber change did the trick. 

[Dose Pipe Sutututu]

On 8/6/2018 at 10:33 AM, ActionDan said:

Really struggling to get the brakes up to temp and working, even with the ducts covered.

Keen on Intima Type-D v2.0?

[No Crust Racing]

I will get this setup through to the end of this season then go from there as i may end up with 5 stud/different brakes yet.

I have new project mu rotors and pads on the shelf, in 4 stud, so may use those yet. 

You got tyre hookups yet?