NitroDann's Long Awaited Garage Thread

[NitroDann]

Hey smart alec, its around, Ive seen it too, but Its been more than a month for me. How about this setup with an EFR on it?

The car has always had this turbo, and has been 1.05 at wakefield with it. Ive been using John Collins, you can imagine the effort needed to get a 9000rpm megasquirted car on his dyno, it took some convincing.

The car is destined for a big ol' Borg but for now I figured we might as well go for the record. And yeah 300 on a DD is like 340 on a mustang anyways.

For me I really just enjoy making the setups and seeing what can be done, learning as much as I can along the way.
The 297 we made was running all of the boost, at that stage the wastegate basically wasnt moving so its far out of the efficiency band of course, but extra airflow is extra airflow.

What this car does make though is massive massive area under the curve, making whatever it was 650 or 750 NM of torque in 5th gear, around 200whp at 4000rpm.

It all comes down to time and budget as to when I can do it but i WILL build a twincharged BP miata and go for zero lag and a huge 500 or 600whp capable turbo.

I just really enjoy the learning and development side. I wish I had a local mentor who had a lot more experience than me to learn from, but for now I just build the best I can and let the times tell the story.

Dann

[Sean]

Hey smart alec, its around, Ive seen it too, but Its been more than a month for me. How about this setup with an EFR on it?

That EFR is goign to be interesting, can't wait to see the results - there's a local EVO tossing up the idea of an EFR at the moment too, but he's worried about the cost - I keep telling him its only money!

I wish I had a local mentor who had a lot more experience than me to learn from, but for now I just build the best I can and let the times tell the story.

Yeah, it was awesome back when Jon was still running RX (Blanch, not Collins haha) cause he was super laid back and willing to share his knowledge. Even though his bread and butter was rotaries, he had a hand in quite a few piston cars, including a handfull of Bseries engines making over 300 in street cars. Even had a FWD astina there that ran 12.4 or 12.5 - YEP FWD BP engine, street tyres and all!

Those were the days!

[NitroDann]

GT35 astina? Yeah I've heard of that. Made 360 or something didn't it?

You should come around one day and pick on my work. I might learn a thing or 3 who knows.

Dann

[Sean]

GT35 astina? Yeah I've heard of that. Made 360 or something didn't it?

You should come around one day and pick on my work. I might learn a thing or 3 who knows.

Dann

Same car, never ran well with the GT turbo, my mate bought it for nearly nothing after it spat a rod literally out of the engine.

Ended up with a BP GTR turbo, which is what it ran the 12s with.

[NitroDann]

Sorry full post ripped straight off miataturbo.
------------------------------------------------------------------------------------------------
Ok guys need an answer by tomorrow or I just go for it.

Is it acceptable to have the turbo outlet pipe inches away from the manifold?

The manifold will 3 layers of ceramic coating and I can get this pipe coated too if need be.







Also most people go straight up from the 38mm opening of the 2560 straight to 2", its ok to go up to 1.75" for 6 inches then go to 2"? You can see pretty clearly the silicone pipe it needs to make it to, it will take 2x 90*'s to get there.

Here is the other option and routing. Able to go straight up to 2" off here.



Also heres some new build pics.'









I swear i got some good ones of the welds up close but they all turned out blurry on my phone, Ill get some extra tomorrow.

Dann

---------------------------------------------------------------------------------------------------------------

I hope all of the attachments work, gotta run.

Dann

[NitroDann]

Are those images working for everyone?

Dann

[MrRevhead]

Are those images working for everyone?

Dann

Images are visible.

I personally would choose Option B, where the pipe is away from the manifold (despite the ceramic coating etc).

Is there any specific reason why you want to go from 1.75" to 2"? Reduce pressure drop?
In all my previous turbo cars, I just went straight to the wider diameter with no gradual/taper in size.

The Manifold, Dump and set-up in general is looking good so far though

[Sean]

Depends on your goals and the intended use of the car.

While the ceramic stuff is fantastic, it's not a magic solution all together - Will teh car be in traffic stop/starting a lot? In reality sitting down low may not be as bad as you think - a lot of the hot air will rise above the manifold with natural convection, and then be sucked down and out the lower rear of the engine bay though to the tunnel.

You could get some temp sensors and test my theory, but I'm almost certain Alan did that with his BPGTR engined NA back in the early 2000s and found lower was cooler - admittedly he wasn't runnign quite that close.

The pipe diametre will likely make two fifths of bugger all difference if you're using the typical GT style turbo - what are the power goals, you know from other cars stock AVO piping to the cooler is fairly small and can support big numbers.

[NitroDann]

I know 2" can support 400rwhp with no issues at all.

Look basically I have to go from 38 (or 40mm whatever its close) to 50 mm, which is the compressor outlet to the 2" intercooler piping. It has to change size at one point.

Im sure your intercooler piping doesnt go from 38 to 50mm instantly there must be a taper (One would hope). So I was going to use a 1.75" OD pipe out of the compressor so that only about 3 inches of pipe would be near the manifold (and even then there will be 40mm clearance odd) do the first 2 turns in the 1.75" because they are small and tidy bends, and then taper up to 2" and into the existing silicone piping.

The car will consume 200+ Litres of air a second at full boost so I cannot imagine how long it will spend in that pipe so I reckon go for it?

Also sean its a racecar, so the only traffic it will encounter will be 911's and Lambourghini's at 1km drag events

Dann

[deviant]

For what my opinion is worth I think either option A or B is going to work for you.

If option B is easier to build and with 40mm betwixt outlet and exhaust you should be able to get a couple of layers of ACL heat shield or something in there.

[Sean]

Racecar should see lots of flow though to pull the hot manifold air down and out the back, or up through a properly vented bonnet.

The ACL stuff is AMAZING too as mentioned - If this is the car you're often playing with (Patrick I think?) I'd go the low route with tapering pipe like you're thinking - sounds like you have a good working relationship and can always switch it up if it becomes problematic.

I'm more street reliable/repeatable focussed with my preferences, but with a turbo 5 you should be able to achieve that in a race car too - a few of the guys here do. That said, the only serious race car I've ever played with was quite limited by the rules and not an MX5... Plenty of fun though

[NitroDann]

Yeah I even went a little small on the manifold runners (1.25") in an attempt to get some midrange and if it just doesnt work 103%, I can sell it and go again, having said that for our goals Im sure it will work, Im just giving you an idea.

Basically nothing is on the turbo side of this car so ALMOST nothing needs shielding. With everything machined dead flat and no gaskets to fail, resbond everywhere and 10mm inconel where its needed, along with a turbo brace and 2 downpipe braces, I reckon we should be pretty bulletproof.

Been wrong before lol.

Dann

[deviant]

I was going to ask in my post about the down pipe...looks like it would all just be hanging off the flange but as usual you have got your shiz together and have braces planned

[NitroDann]

Did some today. All of the welds are not complete, and of course I need to fix that leak still and then assemble the car with proper fasteners etc. Dyno next week.

New exhaust, 3" mandrel SS. V band at the dump pipe, high flow 'cat' and the biggest magnaflow that fits.


My dump pipe vs the AVO one.


And this is how it looks finished but with a few welds that need finishing.
The intake wasnt my first choice but will have to be completely redone with the addition of the EFR so I figure for now it will do.




WOOOOOOOOOSH !!!


Again anything that anyone thinks is rubbish or should be redone or could be improved please start typing.



Dann

[Sean]

Looks alright to me dude!

Esp like the thought to brace the top of the turbo - could be neater, but I'm sure you'll tidy that up and the rest looks pretty good.

Will look king with the manifold etc all caoted up. Is the plan to just swap out the flange with the EFR when that time comes or was this manifold designed specifically with the GT in mind?