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I supported Toymods
Location:
Brisbane, QLD
Registered:
May 2002
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Re: JZA80 engine conversion options
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Fri, 13 September 2002 16:20
 
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On the topic of VVT-i (GT, i am just saying... promise  , there are couple of things that I've "noticed" (on the 2JZ-GTE though... probably should apply to 1JZ as well).
Firstly, the main difference in the VVT-i and non VVT-i version is not the cylinder head, but the intake cam and the timing sprocket (the VVT-i timing sprocket is actually a hydrualing actuator that changes the cam position relative to the gear for 0 - 60 degree adjustment in the intake cam duration. Yes, much simpler than the Ferrari 3-d cam profile based variable valve lift and timing which moves the camshaft horizontally to achieve the variation).
So for a VVT-i conversion of a non VVT-i head, you'll need:
The VVT-i intake camshaft.
VVT-i timing sprocket actautor (and the connecting bolt etc.)
Plus you will need the VVT-i version of the ECU.
However, things might get complicated with the VVT-i ECU because the connectors and the loom might be different (as the VVT-i ECU in Supras don't have an additional ECTS computer which it works with). There are fuel rail/injector(?) and coil pack differences as well (on the 2JZ-GTE) between the VVT-i and the non VVT-i version. So you might need some work to adapt the existing stuff to the new ECU or get the VVT-i engine versions of whatever that needs changing.
So it's a bit of work
But having 440Nm@2400 as opposed to 4200 kinda kicks ass (maybe?). As for if it's worth the trouble, you decide
Yeah, and VVT-i appeared in 97/09 and onwards (depending on the model).
Hope this helps.
Cheers
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| | Subject | Poster | Date |
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JZA80 engine conversion options
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omytjz | Thu, 12 September 2002 15:12 |
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Re: JZA80 engine conversion options
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poombah | Thu, 12 September 2002 15:19 |
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Re: JZA80 engine conversion options
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omytjz | Thu, 12 September 2002 21:45 |
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Re: JZA80 engine conversion options
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gianttomato | Thu, 12 September 2002 20:25 |
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Re: JZA80 engine conversion options
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poombah | Fri, 13 September 2002 00:10 |
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Re: JZA80 engine conversion options
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E30-323ti | Thu, 12 September 2002 21:44 |
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Re: JZA80 engine conversion options
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Norbie | Thu, 12 September 2002 23:23 |
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Re: JZA80 engine conversion options
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E30-323ti | Fri, 13 September 2002 00:11 |
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Re: JZA80 engine conversion options
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gianttomato | Fri, 13 September 2002 03:48 |
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Re: JZA80 engine conversion options
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omytjz | Fri, 13 September 2002 10:19 |
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Re: JZA80 engine conversion options
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mx83toy | Fri, 13 September 2002 11:25 |
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Re: JZA80 engine conversion options
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gianttomato | Fri, 13 September 2002 11:30 |
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Re: JZA80 engine conversion options
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omytjz | Fri, 13 September 2002 15:07 |
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Re: JZA80 engine conversion options
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humble | Fri, 13 September 2002 16:20 |
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Re: JZA80 engine conversion options
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omytjz | Fri, 13 September 2002 16:54 |
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Re: JZA80 engine conversion options
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humble | Fri, 13 September 2002 17:00 |
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Re: JZA80 engine conversion options
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zorro | Fri, 13 September 2002 17:23 |
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Re: JZA80 engine conversion options
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gianttomato | Sat, 14 September 2002 03:21 |
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Re: JZA80 engine conversion options
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mrshin | Sat, 14 September 2002 12:34 |
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Re: JZA80 engine conversion options
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Hunty | Sat, 14 September 2002 17:07 |
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Re: JZA80 engine conversion options
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Norbie | Sat, 14 September 2002 23:49 |
