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Killertomatoe92

vvt-i or non vvt-i(im sure this isn't the first for this topic)

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hi,i have an 89 supra turbo with 150,000 original miles and plan on going 1jz,just cant decide which is the better choice ,vvt-i or non vvt-i ,what do you guys think?

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When I chose the 2JZ I put in my Mk3 Supra, I deliberately went for the NON-vvti engine.

 

That's because it's a Non-Interference engine (unlike the vvti version)

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On 7/27/2017 at 0:40 PM, Roger NE said:

When I chose the 2JZ I put in my Mk3 Supra, I deliberately went for the NON-vvti engine.

 

That's because it's a Non-Interference engine (unlike the vvti version)

 

Incorrect... Both vvti & non vvti are Non-interference.

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Regarding VVTi or not, The vvti 2jzge/gte and non-vvti are internally identical from the head down. The vvti engines have been proven to produce more power at lower RPMS, however the trade off is that parts for them (cams for one) could be more expensive and rare. As for them being cheaper it just depends where you go.

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Quote

Incorrect... Both vvti & non vvti are Non-interference

 

How do you know that?    EVERY thread I have searched on LOTS of different websites say this:

 

2jz-GE and 2jz-GTE are non interference (see next note)
2jz-GE and 2jz-GTE are interference in VVT-I format (1998+)

 

However . . . just found other sites that say this:

 

so the 2JZ-GTE vvt-i are not - inteference
but the 2JZ-GE vvt-i are inteference

 

I suspect the latter is true . . . and the reason the 2JZ-GTE isn't interference (unlike the 2JZ-GE with VVTI) I suspect is because the turbo version is lower compression, so has bigger recesses on the piston tops.

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all non turbos are higher compressions so an N/A is far more likely to be an interference engine than a turbo but is that a good enough reason for choice? the best engine is frankly the one that suits your pocket at the time. i would choose an engine on horsepower every time than worry about a timing belt failure. if you are going to put in the effort then put in the best engine you can get. i have always thought that if i had to get a new engine for some reason i would get a vvti as it is the newer and more powerful engine. 

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