Guest FullAttack Posted June 6, 2014 Share Posted June 6, 2014 Yo dudes, I signed up mainly to find out this particular question, and other info on vvti.. Iv had a good search but not found anything relevant.. I recently sold my 1j from my Altezza to help a friend out to get his car to rd1 of BDC.. Knowing I have a good 1j Block & Crank, and muchos other JZ parts, I didn't mind so much as itll give me the oppotunity to build myself a new engine... I want to keep with a short stroke 1j bottom end because i like its characteristics for drifting, not going to be running a massive turbo so not looking for addition displacement whether that be a stroker kit or 2j bottom end. Don't worry about pistons, they'll be made to suit, and ConRods will be forged items. What I do want though, is the best head I can build.. VVTi is a Must.. Obviously I'll be changing cams etc.. But which VVTi head is better? GE or GTE? I'm looking for Valve size, Flow rates, CC, etc info Does anyone have any info or links I can take a look at? I'm sure people must have tested them before, but I'm useless at searching so any help will be much appreciated. If not, anyone got a very cheap GTE vvti head that's dead but good enough for testing? Can get a whole GE engine for about 37 pence so that head won't be hard to find. Cheers dudes Dale Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 7, 2014 Share Posted June 7, 2014 Anyone? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 7, 2014 Share Posted June 7, 2014 I would imagine very VERY few here have even seen an N/A VVTi head, let alone had one on the same flow bench as a VVTi turbo head. Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 7, 2014 Share Posted June 7, 2014 That surprises me.. The reason this question has come about, is because my hero Daigo Saito(who I'm a bit gay for) uses a GE vvti head on a 3.4 bottom end and makes 1200hp.. See where this is going..?!? Lol;) Quote Link to comment Share on other sites More sharing options...
straightsix Posted June 8, 2014 Share Posted June 8, 2014 Try one of the Lexus forums as the GS300 used a VVTi 2JZ-GE. Maybe one of the GS owner's clubs may be able to give you some data? Failing that, you could try getting Mr. Saito into bed and maybe his tuning secrets will be your pillow talk..... Quote Link to comment Share on other sites More sharing options...
Guigsy Posted June 8, 2014 Share Posted June 8, 2014 Why is vvti a must? Just out of interest? Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 8, 2014 Share Posted June 8, 2014 Try one of the Lexus forums as the GS300 used a VVTi 2JZ-GE. Maybe one of the GS owner's clubs may be able to give you some data? Failing that, you could try getting Mr. Saito into bed and maybe his tuning secrets will be your pillow talk..... I'd love to, however the language barrier may proove to be an issue.. And, is there any GS owners clubs, thought all the GS owners where to old to use the Internet? Haha Why is vvti a must? Just out of interest? VVTi is a must because I want a massive turbo, anything to help that badboy spin up earlier.. VVTi is amazing, it was designed to make you go faster, so why not use it;) Quote Link to comment Share on other sites More sharing options...
straightsix Posted June 8, 2014 Share Posted June 8, 2014 I'd love to, however the language barrier may proove to be an issue.. And, is there any GS owners clubs, thought all the GS owners where to old to use the Internet? Haha Man love is a universal language. Just be sure to buy him a drink.... There's a few GS pages on facebook - have a look there. Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted June 9, 2014 Share Posted June 9, 2014 not going to be running a massive turbo VVTi is a must because I want a massive turbo Is there a third, decisive personality we could talk to? Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 9, 2014 Share Posted June 9, 2014 Is there a third, decisive personality we could talk to? Lol.. Yeah, not massive compaired to the turbos you dudes use, but massive for a 1j drift car.. Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 9, 2014 Share Posted June 9, 2014 VVTi is amazing, it was designed to make you go faster, so why not use it;) Wouldn't variable timing on the exhaust be far more beneficial for that? Not that's it's even an option for you if you use a Supra engine. At the risk of teaching you to suck eggs, VVTi was designed to give you more low down torque or top end power, without one having to compromise the other. You could still tune for either using a non-VVTi head, but you wouldn't get both. I have no idea about drifing so I don't know if the top or bottom end is more important to you. Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 9, 2014 Share Posted June 9, 2014 Dual VVTi would be the ultimate, but don't know if I want to start machining a head to fit vvti on the exhaust cam.. I have read that it's been done before though.. There's no right or wrong when it comes to a drift setup, what might work for one person wont work for the next.. Some people like limiter bashing, some feather the gas lower down the rev range.. I do a bit of both.. I guess I'd be happy with around 750hp, but I don't want to be waiting an age for the turbo to spool up.. There's no debating that vvti will help it spool earlier than it otherwise would. I'm going to be using a 4spd Trans, so want as much of the rev range as usable as poss.. Quote Link to comment Share on other sites More sharing options...
garethr Posted June 9, 2014 Share Posted June 9, 2014 Would the VVTi 2JZ head work on a 1JZ bottom end? The reason I ask is that VVTi / single turbo made a huge difference to the 1JZ (same torque at half the revs), but (IIRC) it doesn't have such a marked effect on the 2JZ. Interesting project though, I doubt that anyone else has put a 2JZ VVTi head on a 1JZ-GTE block. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 9, 2014 Share Posted June 9, 2014 A Caterfield or a 250cc kart is probably the ultimate drift machine, beyond 120 BHP it's all pose value and making a tank make smoke Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 10, 2014 Share Posted June 10, 2014 Would the VVTi 2JZ head work on a 1JZ bottom end? The reason I ask is that VVTi / single turbo made a huge difference to the 1JZ (same torque at half the revs), but (IIRC) it doesn't have such a marked effect on the 2JZ. Interesting project though, I doubt that anyone else has put a 2JZ VVTi head on a 1JZ-GTE block. Yeah iv wanted to build this for a while.. It's always bugged me that people build 1.5j using 2j bottom end with a 1j head.. This has never made sense because the 2j head is better.. The 1j head will restrict the Volumetric Efficiency of the 2j bottom end.. It has been done once as far as I know, by DriftMotion in US.. He's used a 2jgte head. Don't think it's finished yet though.. On paper it should work well and be very revy.. It'll be awesome with a reasonable sized turbo making around 600hp.. Very early spool up and power increasing all the way to 9000rpm.. But to make that extra 150hp at top end will require a bigger turbo, which will spool much later.. So to make that bigger turbo spool quicker, I need to increase the VE, so do I stroke a 1j which will increase CC/VE and give more torque by altering the crank/rod angle of projection.. I kinda feel like this defeats the object of a short stroke 1j.. And if I'm going to stroke a 1j would it make more sense to just use a 2j bottom end.. Then should I stroke that...lol.. I'm talking myself into all sorts, I have no idea what I want anymore..lol It's swings and round-abouts.. Short stroke will be revy, but longer stroke will spool turbo quicker and thus rev up quicker.. But regardless of what bottom end I end up using, I still want to figure out the original question.. Which is the better vvti head.. Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 10, 2014 Share Posted June 10, 2014 A Caterfield or a 250cc kart is probably the ultimate drift machine, beyond 120 BHP it's all pose value and making a tank make smoke Yep drifting is 90% pose and 10% glory.. But I love it.. You supra dudes are just as bad for the pose;) Quote Link to comment Share on other sites More sharing options...
Guigsy Posted June 10, 2014 Share Posted June 10, 2014 I'd love to, however the language barrier may proove to be an issue.. And, is there any GS owners clubs, thought all the GS owners where to old to use the Internet? Haha VVTi is a must because I want a massive turbo, anything to help that badboy spin up earlier.. VVTi is amazing, it was designed to make you go faster, so why not use it;) But you say you not going to be running a massive turbo. So why bother. Lol Quote Link to comment Share on other sites More sharing options...
David P Posted June 10, 2014 Share Posted June 10, 2014 I reckon it'd be easier to fit a skinny set of cross ply tyres on the back? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 10, 2014 Share Posted June 10, 2014 Making a car have bugger all grip is easy. Making it *HAVE* grip and traction is not. That's probably why drifting is more popular in Japanese car forums than circuit racing Quote Link to comment Share on other sites More sharing options...
Guest FullAttack Posted June 10, 2014 Share Posted June 10, 2014 Yeah that's the common miss perception.. Without grip, you crash.. I'v got 17x9 up front and 17x10 with a 245 on the rear.. Will possibly go wider on the rear when iv built the car.. Why bother?! Because I can.. This is going to be as much of a show piece as it will be a drift car... It's an example of what I can build.. The first version of my car has given me enough work to keep me flat out for the past 7-8 months.. Quote Link to comment Share on other sites More sharing options...
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