Nathanj1142 Posted June 8, 2020 Share Posted June 8, 2020 (edited) Finding it difficult to find the differences between the is300 2jz and the supra one. I'd like to build up an na-t engine to go in my supra over time so that i don't have to take my car off the road again. Other than the sump setup, are there any other variances that might cause me an issue if i use a non-vvti lexus engine? IE: using the supra loom. (my current engine is non-vvti) Cheers, Nathan Edited June 8, 2020 by Nathanj1142 (see edit history) Quote Link to comment Share on other sites More sharing options...
Noz Posted June 8, 2020 Share Posted June 8, 2020 Is300 is vvti. I've never seen a non vvti 2jz in one mate. Quote Link to comment Share on other sites More sharing options...
Dan8 Posted June 8, 2020 Share Posted June 8, 2020 The NA VVTi has weaker rods as well but if only running low boost wouldn’t be a problem if your just building the bottom end and using your head sure you can just retain everything if your non VVTi as your cams and head will still run dizzy Quote Link to comment Share on other sites More sharing options...
Nathanj1142 Posted June 8, 2020 Author Share Posted June 8, 2020 Is300 is vvti. I've never seen a non vvti 2jz in one mate. am i maybe thinking of the gs300 then? Quote Link to comment Share on other sites More sharing options...
Steve Posted June 8, 2020 Share Posted June 8, 2020 IS300 is definitely VVTI, I have one sitting in my garage. Quote Link to comment Share on other sites More sharing options...
erachter Posted June 8, 2020 Share Posted June 8, 2020 am i maybe thinking of the gs300 then? Yes, but depending on year they are either non-vvti or vvti Quote Link to comment Share on other sites More sharing options...
AC93 Posted June 8, 2020 Share Posted June 8, 2020 I'm doing a VVTi NA-T.. makes sense, extra spool and no dizzy/HT leads. Much more modern set up Weaker rods yes, I had my bottom end forged or you can use TT or GE non vvti rods depending on your power goals Quote Link to comment Share on other sites More sharing options...
Nathanj1142 Posted June 8, 2020 Author Share Posted June 8, 2020 I'm doing a VVTi NA-T.. makes sense, extra spool and no dizzy/HT leads. Much more modern set up Weaker rods yes, I had my bottom end forged or you can use TT or GE non vvti rods depending on your power goals If i were to go down the vvti route, would a lexus engine be a fairly easy swap? my concern is adapting the loom to accompany CAN which i believe is what the VVTI heads run on? Quote Link to comment Share on other sites More sharing options...
Nathanj1142 Posted June 8, 2020 Author Share Posted June 8, 2020 i'd like to add that im planning on going for a Link ECU setup too, so this might be beneficial if going VVTI - - - Updated - - - Yes, but depending on year they are either non-vvti or vvti So in this case, would a gs300 non-vvti be a straight swap? Quote Link to comment Share on other sites More sharing options...
erachter Posted June 8, 2020 Share Posted June 8, 2020 i'd like to add that im planning on going for a Link ECU setup too, so this might be beneficial if going VVTI - - - Updated - - - So in this case, would a gs300 non-vvti be a straight swap? Nothing is a straight swap I guess it will be similar to aristo TT swap(http://www.2jzgarage.com/2014/08/toyota-supra-na-tt-conversion-summary-part-1/) The biggest issue will be wiring. Do you already have a head or bottom-end? Quote Link to comment Share on other sites More sharing options...
Nathanj1142 Posted June 8, 2020 Author Share Posted June 8, 2020 Nothing is a straight swap I guess it will be similar to aristo TT swap(http://www.2jzgarage.com/2014/08/toyota-supra-na-tt-conversion-summary-part-1/) The biggest issue will be wiring. Do you already have a head or bottom-end? Yeah I already have my engine. I just wanted to build one up that I can swap straight in when I’m ready to go turbo Quote Link to comment Share on other sites More sharing options...
erachter Posted June 8, 2020 Share Posted June 8, 2020 Yeah I already have my engine. I just wanted to build one up that I can swap straight in when I’m ready to go turbo /QUOTE] Oh I see, if you are chasing 400-450 hp then VVTI stock bottomend should be fine (you will have more torque down low because of VVTI too) If you want anything more than that I would get a non-VVTI block (should be fine for around 600-700, although some people push it up to 1k hp) or you could go for VVTI engine + rods and pistons but it will be more expensive. I don't think it will be any different swapping a VVTI or non-VVTI since you will have to do the wiring anyways. Of course best thing possible is to find a Supra engine, but they are as rare as unicorns Quote Link to comment Share on other sites More sharing options...
Dan8 Posted June 8, 2020 Share Posted June 8, 2020 If your planning running the Link ECU it shouldn’t be to much of a problem as you will be adapting wiring and adding new sensor looms and extension harnesses will be much easier to get it from a supra donor though and even better if you get the engine harness with it If you go to the Link ECU forum and do some searches there’s a lot of great info there that helps you from other people who have done it you can also post threads and share files and maps to get you running Then take for mapping this is what I did might be worth a look first Quote Link to comment Share on other sites More sharing options...
Nathanj1142 Posted June 8, 2020 Author Share Posted June 8, 2020 IS300 is definitely VVTI, I have one sitting in my garage. for sale? Quote Link to comment Share on other sites More sharing options...
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