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400 whp on N/A VQ possible?

just get that mad vtec yo!

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Old 05-15-2014, 11:26 PM   #16 (permalink)
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just get that mad vtec yo!
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Old 05-16-2014, 12:40 AM   #17 (permalink)
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Originally Posted by Elmo370z View Post
That's what I was afraid of hearing. the highest NA is like 340-350 on pump gas, I just believe that you can squeeze 50 more whp without sacrificing drivability. Wouldn't you agree?

What are you basing the idea that there's another 50whp in there? If you go through shamus build, he'll be close to 400whp with a 4.0 on e85. Pm him and ask costs.
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Old 05-16-2014, 12:41 AM   #18 (permalink)
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Originally Posted by Elmo370z View Post
I don't think you need 15k to make 400 whp on a NA build. Now there isn't to much information out there about the JUN cams; full bolt on's that cam and a great tuner could come close to the 400 mark, don't you think? Noone out there with money to play with has even attempted to try and build the car a VQ motor to make 400 whp (NA), "MOST" everyone here in the states wants power fast so they go with F.I. Anyone have any information on the tuners in Japan or do they not like releasing that kind of information out?

Navyboy has the jun cams and built heads and is around the 315ish mark. They're not the magic bullet you think they are.
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Old 05-16-2014, 04:03 AM   #19 (permalink)
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Originally Posted by Elmo370z View Post
I don't think you need 15k to make 400 whp on a NA build. Now there isn't to much information out there about the JUN cams; full bolt on's that cam and a great tuner could come close to the 400 mark, don't you think? Noone out there with money to play with has even attempted to try and build the car a VQ motor to make 400 whp (NA), "MOST" everyone here in the states wants power fast so they go with F.I. Anyone have any information on the tuners in Japan or do they not like releasing that kind of information out?
HP is torque over time.

If the engine could maintain peak torque up to, say, 10K or 12K RPM, you might very well see 400 whp, with the right valvetrain, headers, etc etc.. I just threw out 15K off the top of my head, but higher powered F1 engines rev verrrrrry high to make that power.

Of course, the oil pump on our motors seems to kerplode at a mere 8K RPM, so...
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Old 05-16-2014, 11:10 AM   #20 (permalink)
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Originally Posted by Chuck33079 View Post
Navyboy has the jun cams and built heads and is around the 315ish mark. They're not the magic bullet you think they are.
Navyboy's lower than expected reading is probably because of the tune, not necessarily the cams themselves. I'd imagine the hardest thing about trying to get to 400 HP NA is the tuning.

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Old 05-17-2014, 02:44 PM   #21 (permalink)
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@ chuck someone in N.J. got 325 whp with and UpRev, exhaust , and intake. I have to agree with the statement made by Eclipz,. I'm may not be the smartest person about tuning cars, but I'm no dummy either and to back my additional 50whp somewhere in the motor, nobody has even tried without doing something crazy to the motor. I need to hit the lotto so I can test my hypothesis out.
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Old 05-17-2014, 02:58 PM   #22 (permalink)
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Old 05-18-2014, 12:38 AM   #23 (permalink)
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Originally Posted by Elmo370z View Post
I just believe that you can squeeze 50 more whp without sacrificing drivability.
From where? Not even on big american engines can you make gains of 50 whp without sacrificing some measure of drivability. It ain't happening on the Z. Not without a stroker crank, some big nasty cams, higher compression, headwork, etc...

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Old 05-18-2014, 12:44 AM   #24 (permalink)
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Originally Posted by Elmo370z View Post
I don't think you need 15k to make 400 whp on a NA build.
You're right. You need twice that amount.

Quote:
Now there isn't to much information out there about the JUN cams; full bolt on's that cam and a great tuner could come close to the 400 mark, don't you think?
No.

Quote:
No one out there with money to play with has even attempted to try and build the car a VQ motor to make 400 whp (NA), "MOST" everyone here in the states wants power fast so they go with F.I.
There's a reason why.


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Old 05-18-2014, 01:39 AM   #25 (permalink)
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Back in the '60s, when fuel economy wasn't a big deal, car manufacturers were pretty sloppy and one could take a stock engine, slap a bigger carb and manifolds on it, maybe a hotter cam, and you could expect some pretty large gains. Add a basic balance/blue-print/port/polish job (not exactly a bolt-on but you don't have to buy a lot of expensive parts, either) and it was not unheard of to boost HP by 25% or more.

The days of getting big gains with bolt-ons and cheap mods are gone. The manufacturers have already picked the low-hanging fruit.

As others have said: if you want big gains, expect to spend big money.
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Old 05-18-2014, 03:18 AM   #26 (permalink)
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Originally Posted by SouthArk370Z View Post
Back in the '60s, when fuel economy wasn't a big deal, car manufacturers were pretty sloppy and one could take a stock engine, slap a bigger carb and manifolds on it, maybe a hotter cam, and you could expect some pretty large gains. Add a basic balance/blue-print/port/polish job (not exactly a bolt-on but you don't have to buy a lot of expensive parts, either) and it was not unheard of to boost HP by 25% or more.

The days of getting big gains with bolt-ons and cheap mods are gone. The manufacturers have already picked the low-hanging fruit.

As others have said: if you want big gains, expect to spend big money.
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Old 05-18-2014, 08:11 AM   #27 (permalink)
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Old 05-18-2014, 11:04 AM   #28 (permalink)
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Old 05-18-2014, 05:56 PM   #29 (permalink)
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Wonder if these guys might be able to help develop an IM etc. they have lots off stuff for the honda guys as well as domestics.

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Old 05-19-2014, 08:58 PM   #30 (permalink)
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@Jcosta. I seriously don't think you need 30K to build a 400whp Na Z. Tsm is making good progress with the NA build and maybe they will be the first to do it. Tsm made 340 to the wheels on 93 octane. and 350 with e85. So your telling me there is no way they can pull an extra 50-60 whp horsepower with spending some crazy amount of cash? still no one knows, maybe the best Japanese tuners what the full potential of the VQ.
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