NitroDann's Long Awaited Garage Thread

[NitroDann]

Thanks Pham.

So peters GT28 SE is going great. Still road tuning. Just running 6 psi gate pressure. I'm doing a very very safe tune without much timing and running 10.5:1 AFR at full boost, so it's very conservative, still powers away from my na6 like it's stationary though haha. It will get a proper tume and ALL OF IT when it's run in.

This is sort of a hallmark for me. I built everything on this car from scratch, the engine from the crank up, the entire turbo and exhaust system from scratch and tuned it from a base map. Basically I am responsible for every single part of the performance package rather than just a piece here or there.

Dann

[gslender]

This is sort of a hallmark for me. I built everything on this car from scratch, the engine from the crank up, the entire turbo and exhaust system from scratch and tuned it from a base map. Basically I am responsible for every single part of the performance package rather than just a piece here or there.

Dann

So what ECU are you running with this?

G

[NitroDann]

It's an SE so it has an adaptronic setup as a piggyback.

Dann

[deviant]

Hey Dann...How do we reckon my Nitro spec exhaust would go if I add a sneaky supercharger to my car?

If I remember rightly it was 2.5in > 2.25in > 2in.

I'm not immediately thinking of big power but would like to see 200BHP at the treads.

[NitroDann]

Should be fine, the twin 2 inch are massive over kill on the rest of the system and everything is straight through.

I dont think you would have any huge issues hitting 200 with an mp62 or a rotrex.

Dann

[deviant]

Awesome...Thanks Dann. I'm seeing many more wheelspins in my future.

[SalonRacing]

Is that a 6258? They look pretty sweet, really interested to see how it works. Stock cams in that engine?

Do you have any pictures of a dump pipe for a gt28 flange, I am trying to get my head around how to get that shape to make a decent transition into 3" piping.
Using an SP manifold so the turbo sits high and flat, dump has to make the turn pretty much straight away.

[NitroDann]

Ill try, when im not doing anything fancy I usually use a 3" mandrel bend. You basically panel beat it into the basic kidney shape, then you weld a few of the closest edges on, and then you stretch the metal to fit the flange with either heat and a hammer or a hammer and anvil. Its hard work but it works well. [Those ugly welds at the end of the DP were done by an exhaust shop after I sold that DP/mani combo, not my welds]



Stolen from taocles FS thread, this is the best photo I could find quickly to show up. But basically a 3" pipe is a little smaller than the inside of the flange when beaten into the approximate shape, so do that first, weld a few edges on so it doesnt move, then beat the rest outwards so it meets the flange nicely. Good luck, hope you are fit its hard work.

Dann

PS the EFR setup will have stock cams but built bottom end.

[NitroDann]

Also while Im in this thread, for the people who notice my new avatar, the world record for an unmodified Garret GT2560 on any Miata is 310rwhp peak, on a well built 1.8L.

The GT2560 is the standard SP turbo, its also the stock jap spec S15 turbo, and is the most popular turbo in the world for MX5 turbo conversions.

The highest peak pull Patricks NA6 has managed is 297WHP with a log manifold, 2.5" exhaust off a downpipe smaller than 2.5" and hotdogs and cats etc.

With the new manifold and exhaust its looking good to break the old 310 record. One thing is that the turbo itself runs out of flow in both the compressor and the exhaust housing at 300rwhp, so just hitting 310 means everything needs to be working perfectly and with fantastic efficiency, so that last 15HP to break the record is a big ask.

Anyways, we will see how it goes soon enough and then the car will get something serious (turbo) to match the manifold soon.

Dann

[SalonRacing]

Thanks a lot mate looks like it would clear perfectly, I can cheat a bit and use the press at work if I get tired.
I am really tempted to make up a log manifold for this thing, basically in the same position but clocking the flange about 15degrees clockwise would make everything so much easier.

[NitroDann]

You could always weld 2 T25 inlet flanges together with a slight twist and fix the flow with a bit of weld and a die grinder.

Think about it, seriously.

Dann

[NitroDann]

Manifold is finished and I'm starting the exhaust.









When was last time you saw that level of turbo gear on an aussie mx5 build?

Dann

[Old Dude]

Looks pretty nice Dann

Cheers
Dale

[Muzdaman]

Love it.

[Sean]

Manifold is finished and I'm starting the exhaust.

When was last time you saw that level of turbo gear on an aussie mx5 build?

About a month ago

The highest peak pull Patricks NA6 has managed is 297WHP with a log manifold, 2.5" exhaust off a downpipe smaller than 2.5" and hotdogs and cats etc.

I thought you'd already made significantly more than that? Have you rolled back turbo size just to claim the 310hp record?

Any rate, it's real good going, which dyno are you using? I've used most dyno's around newcastle and found all of the DD ones seems to give repeatable and comparible figures.

We went 299whp on an s15 turbo 1.6 but found anything over about 280 (maybe even lower this was over 5 years ago) you are just stretching the limits of the turboand starting to really heat the air, lots more boost, but gotta pull timing, so lots more boost equals little gain.

Goodluck with it though, I think 310 on a DD is more than 310 on a US mustang anyhow.