Aren't 245 slicks about $1100??? Yeah my brain just got confused.

The slicks come from Porsche carerra cup cars who are given heaps as part of the series and replace them when they are still very good. This is part of the big wheels decision he has made.

The fabrication I do for him at a very very good price because we are friends.

The gt28rs can make 350whp comfortably, and in a road race miata 350 reliable HP is a lot in my opinion. The goal is response driveability and area under the curve. It could have a 1.8L but this very good engine fell into his lap and suits all of his preexisting parts.

Dann

the spud is completely tapped out at 350. I'd post the charts but you already know what they look like.

Yeah but its area under the curve not peak power I'm after. I'm sure it will do for now.

I'm sure it will "do", and I'm sure you can come up with a million excuses as to why this makes sense, but its just not ideal.

I think with your fab skills and with his use for the car, its just begging for a 1.8 and EFR.

Even if you didn't go efr, I'd at the very least switch to 1.8.

The spud will probably take til 4000-4500 to come alive, and that's a ton of area under curve he'll be giving up.

Just something to consider.

I tried my best to talk him into just giving Sav a cheque and getting him to ship an E85 dedicated BP build over, and then going to an EFR when more funds become available.

But when an almost brand new, very serious engine came up for almost free, the plans changed. Regardless it lets me learn about high comp and boost, and allows everyone else to see, regardless of whether the results are as ideal as they could be.

Dann

Fair enough. Where are those pics?

Ill pull the head off and crank out and get a bunch tonight.

https://www.miataturbo.net/attachmen...ine=1407656955

Dann

Heres some of the pics.

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

https://www.miataturbo.net/attachmen...ine=1407666970

So has anyone here seen a crank like this in a miata?

looks cool. knife edged and polished?

My crank looks like that! It was hella lot of work! Not sure if it's worth it. I think saved over a pound from what I remembered. More looked cool than anything else!

The weight savings is only half the story, the crank will have a lot less windage than a stock crank... any reduction in lost hp is a hp gain :)

Keith

Air windage as our cranks don't move through oil, so pretty darn minimal.

They don't move through standing oil.

Dann

Crank is getting Mic'd this arvo, Ill order suitable bearings, then it will be dummied, we will find the actual compression ratio, then we will move it to probably 11:1 because thats what all of the local tuners seem to be comfortable with.

The GT28RS is here, and a TurboSmart 38mm UltraGate with V Bands will be here tomorrow.

Then its getting an external pressure relief valve, a Commetic head gasket, block skimmed, quick hone just to put a fresh pattern on it and it will be bolted together and tuned.

Ill street tune it n/a to start with and get the cruise and idle fueling and stuff nice, sort out the throttle response etc, then it will go to a dyno which I havnt decided on.



18PSI, what do I need on the sheet to get a result you wont bitch and moan about?

Dann

Are you seriously trying to go down that road again?

After I am actually nice and serious in your thread?

Really?

PS: pressure relief valve? Like a "boost fuse"? :laugh: You want one? I actually have that piece of 1980's technology

Yeah honestly, what do you want to see, No trolling this thread we'll both take it serious. What do you want, I havnt decided on a dyno or tuner yet, and Ill have him set it up in whatever mode suits you guys.

And no its just an external oil pressure regulator, a Peterson one, I used the wrong wording.

Dann

Aim for 350-400. I'd like to see what a spud is capable of at full tilt.

See now I cant tell if you are serious or not haha.


I didnt mean what HP I meant what dyno brand, setting on the dyno etc.

Ill get a video this time also.

Dann