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Discussion Starter #1
I was wondering if anyone here is running a T-67 dbb or a T-71 dbb turbo on a 1jz with a ported head and cams. I'm mainly asking because I am coming up empty handed on compressor maps for either of these two turbos and I am very worried about surging with a T71. My aim is at least 600rwhp and i know a T67 dbb has done this on high boost. I was just curious if anyone has done a T71 dbb on a 1jz and if it surges. Thanks.
 

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Moderator, l337 M0d3r4t0r
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12,246 Posts
i believe 1jz power had it.. i would expect it to be very laggy, infact down right useless unless you rev to 8500 RPM at min..

67 deff will get you there with the cams... 71 with more breathing room....

I haven't heard of any surging issues.
 

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Thinking Person
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Wouldnt it be safer to say cams AND an intake mani upgrade? From the comparison pics I've seen, the 1jz intake is pretty small compared to the 2jz (relatively speaking here of course).

In fact I've been trying to establish WHY the 1jz breathes so much worse than the 2jz. It can't be just the head. Its got to be the cams and intake
 
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