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400 whp on N/A VQ possible?

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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Old 12-01-2014, 02:00 PM   #46 (permalink)
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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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Old 12-01-2014, 03:17 PM   #47 (permalink)
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Originally Posted by Elmo370z View Post
Bringing back this old thread. Producing 400 N/A whp on a stock block isn't to far fetched after all. With my original thought of keeping the cost under 10K isn't possible with all of custom or 1 0ff parts having to be purchased. Thanks to 1slow370z for pushing the envelope, guess time will tell how far the stock block. Lets see if the motor can spin 9,000 RPM's and make 400whp.
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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Old 12-01-2014, 11:50 PM   #48 (permalink)
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F1 motors have a crazy short stroke, have no valve springs and rev 18,000 rpms. Let along the cost.
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Old 12-02-2014, 01:49 PM   #49 (permalink)
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Originally Posted by Elmo370z View Post
F1 motors have a crazy short stroke, have no valve springs and rev 18,000 rpms. Let along the cost.
There's your answer. Destroke, drysump, supporting head mods and you're set.
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Old 12-02-2014, 03:03 PM   #50 (permalink)
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There's your answer. Destroke, drysump, supporting head mods and you're set.
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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Old 12-02-2014, 03:31 PM   #51 (permalink)
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There a guy making 436hp on NA built
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Old 12-02-2014, 03:59 PM   #52 (permalink)
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There a guy making 436hp on NA built
Who?
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Old 12-02-2014, 04:15 PM   #53 (permalink)
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Who?
Yeah ^^^This^^^ and is it a stroker motor?
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Old 12-02-2014, 04:36 PM   #54 (permalink)
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Quote:
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There a guy making 436hp on NA built
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Who?
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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Old 12-02-2014, 04:53 PM   #55 (permalink)
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he's saying the crank hp of the 371whp world record build. even tho with 15% drivetrain loss thats only 426...
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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Old 12-02-2014, 05:57 PM   #56 (permalink)
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Who?
black dragon maybe?
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Old 12-02-2014, 08:54 PM   #57 (permalink)
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Who?

I see it on 370z facebook page. For sale and it belong to 1slowz
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Old 12-02-2014, 08:55 PM   #58 (permalink)
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'1slow370. That what i mean.
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Old 12-03-2014, 12:57 AM   #59 (permalink)
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WHo is making 436 to the wheels?
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Old 12-03-2014, 06:35 AM   #60 (permalink)
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Not sure it 43*hp to the wheel, bc i havent read the whole thread, but you can check out 1slow370's journal
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