Luxluc Posted December 25, 2019 Share Posted December 25, 2019 Hey guys A little comparison of my SRD1XXX on VVTi head vs non-VVTi head. Both setups were with the CEA 6870 turbo Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 26, 2019 Share Posted December 26, 2019 nice to see it add a decent amount of spool, great result Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted December 26, 2019 Share Posted December 26, 2019 VVTi for the win. Quote Link to comment Share on other sites More sharing options...
AC93 Posted December 26, 2019 Share Posted December 26, 2019 Nice! Look forward to my VVTi head swap! Quote Link to comment Share on other sites More sharing options...
mellonman Posted December 27, 2019 Share Posted December 27, 2019 I remember back in the day people would move away from the vvti heads for the none vvti . not sure why but im sure modern ecus are a factor Quote Link to comment Share on other sites More sharing options...
Mo Reviews Posted December 27, 2019 Share Posted December 27, 2019 I remember back in the day people would move away from the vvti heads for the none vvti . not sure why but im sure modern ecus are a factor As you say, it was because the ECUs in the past were unable to control the VVTI system due to a lack of outputs on the actual ECUs. Now, we have the likes of Syvecs which can control the movements of the entire solar system, let alone our VVTI cars! Great comparison video OP, thank you for sharing! Quote Link to comment Share on other sites More sharing options...
WayneW Posted December 27, 2019 Share Posted December 27, 2019 Awesome Luc & SRD, great to see my greddy manifold was able to hold that kind of power !! Quote Link to comment Share on other sites More sharing options...
Luxluc Posted December 27, 2019 Author Share Posted December 27, 2019 I always wanted to compare both setups. This gives a good idea of the advantage of VVTi. Quote Link to comment Share on other sites More sharing options...
Andrew K Posted December 27, 2019 Share Posted December 27, 2019 Awesome result Luc and nice to see the advantages of a VVTI Quote Link to comment Share on other sites More sharing options...
Sheefa Posted December 28, 2019 Share Posted December 28, 2019 Great result mate. Can't believe the difference! Quote Link to comment Share on other sites More sharing options...
phobos Posted December 29, 2019 Share Posted December 29, 2019 Since you changed the intake plenum as well, installed a heavier modified VVTi head and added 0.2 bar of boost it's comparing apples with pears unfortunately. Would have been nice to see the effect of VVTi only. The best way to do it would be to tune & dyno it with VVTi "disabled" (intake can at constant angle) and repeat the same with VVTi enabled & properly tuned I think. Quote Link to comment Share on other sites More sharing options...
Mo Reviews Posted December 29, 2019 Share Posted December 29, 2019 I don't think the additional head modifications would have made such a substantial difference in spool... also going from a Greddy plenum to a Hypertune plenum wouldn't have a substantial effect like going going from a stock intake to an aftermarket one. As for the additional boost, that would not have the effect of aiding spool. Having said that, I agree with the notion that the test isn't 100% controlled but it does at least give us a rough idea as to the advantages the VVTI system has over the non-VVTI. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted December 29, 2019 Share Posted December 29, 2019 Since you changed the intake plenum as well, installed a heavier modified VVTi head and added 0.2 bar of boost it's comparing apples with pears unfortunately. Would have been nice to see the effect of VVTi only. The best way to do it would be to tune & dyno it with VVTi "disabled" (intake can at constant angle) and repeat the same with VVTi enabled & properly tuned I think. When Luke's new setup was on the dyno for the first time, Lee did a test of pump fuel 1.4 bar with vvti on versus off. I'll grab the dyno graph comparison next week and upload it. Suffice to say the overall trend of vvti making more power and torque and coming in sooner was still true. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted December 29, 2019 Author Share Posted December 29, 2019 Since you changed the intake plenum as well, installed a heavier modified VVTi head and added 0.2 bar of boost it's comparing apples with pears unfortunately. Would have been nice to see the effect of VVTi only. The best way to do it would be to tune & dyno it with VVTi "disabled" (intake can at constant angle) and repeat the same with VVTi enabled & properly tuned I think. Just disregard my thread. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted January 2, 2020 Share Posted January 2, 2020 Here is a dyno comparison at 1.4 bar on pump fuel on Luc's new setup. First run (red) with VVTI disabled, second run (blue) with VVTI enabled. Hope that answers your concerns phobos. Quote Link to comment Share on other sites More sharing options...
Pete Posted January 4, 2020 Share Posted January 4, 2020 Here is a dyno comparison at 1.4 bar on pump fuel on Luc's new setup. First run (red) with VVTI disabled, second run (blue) with VVTI enabled. Hope that answers your concerns phobos. http://www.mkivsupra.net/vbb/attachment.php?attachmentid=234228&stc=1&d=1577971504 Superb! Quote Link to comment Share on other sites More sharing options...
phobos Posted January 6, 2020 Share Posted January 6, 2020 Here is a dyno comparison at 1.4 bar on pump fuel on Luc's new setup. First run (red) with VVTI disabled, second run (blue) with VVTI enabled. Hope that answers your concerns phobos. http://www.mkivsupra.net/vbb/attachment.php?attachmentid=234228&stc=1&d=1577971504 Sweet! I don't think the additional head modifications would have made such a substantial difference in spool... also going from a Greddy plenum to a Hypertune plenum wouldn't have a substantial effect like going going from a stock intake to an aftermarket one. As for the additional boost, that would not have the effect of aiding spool. Having said that, I agree with the notion that the test isn't 100% controlled but it does at least give us a rough idea as to the advantages the VVTI system has over the non-VVTI. Some of the mods might be even counterproductive to spool and the effect of VVTi only might even be larger without them. I'm by no means saying that I don't like the final result, I'm just saying that the comparison is not showing the effect of VVTI only. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.