400 whp on N/A VQ possible?

G37Sam

No one said its impossible. Previous gen F1 engines made 700+bhp out of a naturally aspirated 2.4L engine. It's just a matter a budget really.

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Jordo!

To rev that high it would still need a lot more work -- now we're talking stock block with all new reciprocating parts, different valve train. Look how much went into 1slow's build, and that's without touching the valves (EDIT: although he did swap out the exhaust cam --I forgot about that!) or the rods, pistons, etc.

So yes, everything 1slow did PLUS open the engine, replace with completely different internals, custom valvetrain (more complex due to VVEL), run E85 or very high AKI petrol etc. This is pretty much what was said previously, tho'...

Honestly, if you really want a Z that could be a monster off the line, with 400+whp, and a table top flat torque curve starting off idle, no high rev's or dry sump needed, someone needs to figure out how to make a roots or twin-screw blower work.

If that could be sorted out, it would feel like a N/A V8 and absolutely be a DD beast -- note all the roots blown pony cars and how fast they are...

We've seen great results with TT's and centrifugal blowers, but there's a reason why OEM's use roots type S/C's for their road cars -- it makes the engine perform like a larger version of itself -- no lag, just immediate torque.

You'd need (I think), a clutch type engagement roots or twin-screw blower, a new IM, maybe with laminova A2W coolers (or W/M inj.), probably a different hood, and a tune -- DONE. No high revs or complete overhauls needed, and almost certainly OEM cam.

Throw in headers (bigger primary shorts or LTH's) and it would be a monster. The peak torque and power levels might be kept more modest relative to turbine-type blowers to preserve things like weaker high gears on the AT, but whether AT or MT, it would feel like you stuffed a 5.0 in there when you hit the gas.

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Enjoy it. Destroy it.

Elmo370z

F1 motors have a crazy short stroke, have no valve springs and rev 18,000 rpms. Let along the cost.

G37Sam

There's your answer. Destroke, drysump, supporting head mods and you're set.

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1slow370

yeah except you don't need to destroke nor do you need anything in the heads other than stiffer springs and cams.

External oil pump, better rods, valvesprings and cams, better manifolds = 400whp

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pearlyZ

There a guy making 436hp on NA built

TerribleONE

Who?

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jwick

Yeah ^^^This^^^ and is it a stroker motor?

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

edub370

he's saying the crank hp of the 371whp world record build. even tho with 15% drivetrain loss thats only 426...

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1slow370

well my cars ACTUAL drivetrain loss was 16% as measured by the dyno. 286/332 so 430 but it actually made more because the graph cuts off at 8200rpm

Just to put it out there that the grand am cars are around 420wheel with HR heads at 9500rpm

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G37sHKS

black dragon maybe?

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pearlyZ

I see it on 370z facebook page. For sale and it belong to 1slowz

pearlyZ

'1slow370. That what i mean.

Elmo370z

WHo is making 436 to the wheels?

pearlyZ

Not sure it 43*hp to the wheel, bc i havent read the whole thread, but you can check out 1slow370's journal