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Open in new windowArchive through April 04, 2007Adam Peterson25 
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Adam Peterson
DieHard
Western Australia
Bugatti Veyron

Posts: 772
Reg: 04-2006

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Friday, April 06, 2007 - 11:45 pm, by:  Adam Peterson (President) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Andrew Ferres wrote on Friday, April 06, 2007 - 10:44 pm:

What I'm saying is that you compare a motor with a VTEC cam, to a motor with a nonVTEC cam, BUT HAS THE SAME GRIND AS THE VTEC CAM (ie, the upper end) it will give the same power.



Its still no.. here is an example:
Honda D16y4 SOHC-VTEC (
96kw@6800rpm) vs D16y8 SOHC (88kw@6400rpm). Both engines have the same bore and stroke and 1590cc.

Furthermore, with hondas (and possibly Mitsu MIVEC), a VTEC cam will not fit in a head designed for non VTEC. PLus, as a non VTEC head does not have VTEC control, the VTEC lobe will interfere with the valve clearance and will most likely result in valve float and or bent valves. I see your logic but it simply wont work. But anyways, we're getting way off topic here :-)
Dan McColl
Goo Roo
Victoria
Active V8 and a Factory Manual XF.

Posts: 2119
Reg: 07-2005

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Saturday, April 07, 2007 - 12:14 am, by:  Dan McColl (Hoon) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

He's not saying use a VTEC cam in a non VTEC engine,
He's saying that if you use a cam with same profile, lift, duration, overlap etc as the VTEC cam, you will get the same power.
Byron Clarke
TryHard
NSW
VVTi Turbo Manual

Posts: 134
Reg: 12-2006

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Saturday, April 07, 2007 - 12:29 am, by:  Byron Clarke (Byron) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Andrew Ferres
DieHard
WA
'86 Cressida V8, '84 Soarer V8, '90 C-F Celsior V8

Posts: 631
Reg: 07-2005

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Saturday, April 07, 2007 - 08:53 am, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Dan McColl wrote on Saturday, April 07, 2007 - 12:14 am:

He's not saying use a VTEC cam in a non VTEC engine,
He's saying that if you use a cam with same profile, lift, duration, overlap etc as the VTEC cam, you will get the same power.



Yes, thank you. That is exactly what I'm saying. (also assuming the head flows the same amount)


My whole point is that technology is not making engines that much more powerful (we are purely talking peak power here).
They were making plenty of really powerful race motors in the 70's and 80's.

All technology has done is made the more powerful engines more driveable at the lower rpms.


Back on topic the 1UZ doesn't make power stock because Toyota didn't want it too.


Fow example, look at the a1turbos.co.nz car (formerly 1uzquadcam.co.nz).
They took a completely STOCK motor, put a welded and reground cam in it (of only an 8.9mm lift), their custom ITB setup, extractors, manual, and programable management, and they are claiming 330rwhp out of it.
Thats close to (if not more than) 400hp at the flywheel, or 100hp/L.
They say it still has stock compression, and unported heads.
Thats not bad for about $5k in 'bolt on' components.
Dan McColl
Goo Roo
Victoria
Active V8 and a Factory Manual XF.

Posts: 2122
Reg: 07-2005

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Saturday, April 07, 2007 - 11:39 am, by:  Dan McColl (Hoon) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

And there's a few guys around here with nothing more than a exhaust and a piggyback with around 180 RWKW, or 240 RWHP, close enough to 300ish at then engine, or 75 hp/l. Untouched engine, no cams, no head work etc.

And as Andrew said, 100hp/l with the addition of intake mods and cams.
Adam Peterson
DieHard
Western Australia
Bugatti Veyron

Posts: 775
Reg: 04-2006

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Saturday, April 07, 2007 - 12:04 pm, by:  Adam Peterson (President) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

OK I wont go back onto the VTEC discussion as i can only debate on real applications and not a hypothesis :-)

Are there any performance cams for the 1UZ available ?

Dan, what sort of piggyback you talking about ?
Sounds promising.
Andrew Ferres
DieHard
WA
'86 Cressida V8, '84 Soarer V8, '90 C-F Celsior V8

Posts: 632
Reg: 07-2005

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Saturday, April 07, 2007 - 12:29 pm, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Kelfords, SureCams, Waggott Cams, Tighe Cams all do cast 'billet' cams for the 1UZ.

Most are around the $1500 mark for all 4.
You'll need new springs at ~$300ish.

The stock shim/bucket setup is good for about 10.5mm lift, anything greater will require shim under/shimless bucket conversion (another $500 odd)

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