slow

link to videos?

To compare:

Garrett GT3788R:
comp inducer 72.5mm
comp exducer 64mm
exh inducer 63.5mm
exh exducer 88mm

Precision SC61:
comp inducer 71mm
comp exducer 61.9mm
exh inducer 61mm
exh exducer 82mm

HKS T04Z:
comp inducer 74.2mm
comp exducer 64.7mm
exh inducer 66.7mm
exh exducer 84mm

Garrett GT4088R:
comp inducer 77mm
comp exducer 68mm
exh inducer 63.5mm
exh exducer 88mm

biig trboz.

The stroker is taking 30 psi to 8700rpms, seems to be really bulletproof.

How the hell does he find traction on R888´s, I don´t know.

From 5k to 6.5k that think must be a fucking rocket. I bet that thing is pointless with no traction at all

If I lived somewhere that type of power/speed was "accepted" on the streets, I'd be dead. That's an insane amount of power out of that motor.

At first I thought it would not be very driveable when I saw how late the turbo hit full boost. But, then I saw the redline; The 8700 rpm redline gives the engine about 2200 RPM range of fairly flat peak power. Hell call it a 3300 RPM wide powerband of insane 400+ horsepower. Not much worse powerband width overall than any other turbo bigger than say a 2871. With that steep torque curve that thing must hit like a freight train. In a word, awesome.

What's up with torque and HP crossing at 7500 rpms? Maybe I'm in idiot for asking but I thought that was consistent at 5200.

The dyno plot won't load on my slow ass phone connection, but I'd guess it's because they measure horsepower in different units over there. Still a function of torque, but a different equation.

So does how much power would this thing be throwing down on a dyno here if that's the case??

Holy balls, that must be a wild ride after 5500 rpm lol.

awesome torque curve.

not only are HP and TQ not to scale, they are measured in different units. Math fail.

~30KgM @ 5252rpm = ~216ft.lbs
~225PS @ 5252rpm = ~220bhp

lol, I'm bored as shit this morning so I am going to put my 320/305 chart and his 793/550 chart onto the same graph in excel.

Attachment 202206

here:

https://www.miataturbo.net/forum/att...1&d=1259432940

trackcar_vs_dragcar.jpg

Big cylinder head, big camshafts.

I wanna see what he did to this head to make it flow well at nearly 9000 rpm. Aren't these heads notorious for dying out at high rpm?

There is a reason alright, nobody uses a big camshaft. The miata head flows better than some NASCAR heads. He was man enough to get the combination right and not use a pussy cam.