Friday, April 06, 2007 - 11:45 pm, by: Adam Peterson(President)
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.
Saturday, April 07, 2007 - 12:14 am, by: Dan McColl(Hoon)
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.
Saturday, April 07, 2007 - 08:53 am, by: Andrew Ferres(Peewee)
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.
Saturday, April 07, 2007 - 11:39 am, by: Dan McColl(Hoon)
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