Wipeout Posted August 20, 2003 Share Posted August 20, 2003 I was having a look at the engine when i spotted this mod. It looks like the 2 hoses have been removed from a sensor and then joined together. See pic for more detail. What is it??? Thanks. Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 20, 2003 Author Share Posted August 20, 2003 And another pic!! Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted August 20, 2003 Share Posted August 20, 2003 Someone has removed your sequential turbo setup and made it into a true twin setup. So both 1 and 2 turbos spool up together rather than just 1 and then 1 and 2. Regards Pete Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 20, 2003 Author Share Posted August 20, 2003 Oh!! I read a bit about how to do that and it did'nt look that easy!! If i replace them will it cause any probs?? Also why would someone have done this and not returned it to normal, is it masking another fault! Thanks. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted August 20, 2003 Share Posted August 20, 2003 This is a partial conversion I believe to true twin. Well at least it removes the second turbo prespool control. Just put the ends of the pipes back onto the VSV (behind it in the photos) and try it. The VSV is the thing it's tie wrapped to. It's a personal preference thing. Some like the twin setup and others the sequential. As to why. No idea. Again someone elses preference. You won't hurt it if you try putting it back. Regards Pete Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 20, 2003 Author Share Posted August 20, 2003 Ok, Thanks. Im off to have a play! Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 20, 2003 Author Share Posted August 20, 2003 Back now after playing. I did'nt notice much difference between the setups, it feels slightly smoother with the correct setup. I could hear a slight flutter noise when i floored like something was pressure releasing or a valve was pulsing. What might that be? Anyone know if this is normal? Cheers again. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted August 21, 2003 Share Posted August 21, 2003 What other mods do you have? Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 21, 2003 Author Share Posted August 21, 2003 None. It's a standard UK TT 6spd. Is there likely to be other little bits done to compliment that mod, i had a look but nothing has jumped out at me. Cheers Pete. Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 21, 2003 Share Posted August 21, 2003 I would have though that to make a parallel twin conversion you need to wedge open the exhaust gas control valve as well? Might be worth checking as without that opening as well, 1st turbo boost would be a bit low as it went backwards through the second turbo -Ian Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 21, 2003 Author Share Posted August 21, 2003 It looks ok. I think it is the correct item i am looking at. It sits between the first turbo and the block, looks like a can with a leever in the bottom. Is this correct? Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 21, 2003 Author Share Posted August 21, 2003 Found another pipe linked out!! See pic for detail. This one is at the front of the engine down low. Is this all that is likely to have been done for a true twin mod? OR is there more still hidden away? Thanks for your help. Regards Chris Quote Link to comment Share on other sites More sharing options...
400BHP Posted August 21, 2003 Share Posted August 21, 2003 If it was done 'properly' then the actuator at the back of the turbo assembly will be wired open... Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 21, 2003 Author Share Posted August 21, 2003 Ok i might need a bit more detail. Im new to supra engines. Direct me as to what i should look at to check and what to look for. Thanks. Quote Link to comment Share on other sites More sharing options...
400BHP Posted August 21, 2003 Share Posted August 21, 2003 Pity I dont have a digital camera or i'd take a pic for you. follow cam cover towards bulkhead, on left hand side at back there is a golden coloured cylinder with a rod coming out of it, when you rev the engine up you would see this move but i'm guessing yours is already wired open. Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 21, 2003 Author Share Posted August 21, 2003 That looks ok. It goes in as i rev the engine and comes back out as the revs die down. Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 21, 2003 Author Share Posted August 21, 2003 Just got back in from having a drive about town. It feels alot smoother in sequential setup, but lacks the pull that true twin has, it seems to take forever to get to the redline!! Also i noticed my slight miss fire or hessitation has gone when it was in stock setup, any ideas as to why?? Would the true twin setup be alot harsher and maybe cause the hessitation/ miss fire. Any advice please. Cheers. Quote Link to comment Share on other sites More sharing options...
dude Posted August 21, 2003 Share Posted August 21, 2003 Originally posted by 400BHP If it was done 'properly' then the actuator at the back of the turbo assembly will be wired open... This can be done with just the vacum pipes but you are reliant on the pressure system being in good cond. , there is also an electronic way where you can just switch between the two. John:flame Dev Quote Link to comment Share on other sites More sharing options...
400BHP Posted August 22, 2003 Share Posted August 22, 2003 In my opinion, Toyota spent a huge amount of money developing sequential for a reason, like John says, your vacuum system needs to be in good working order for this to work otherwise #2 turbo wont get any prespool and it will just slam into action, which may damage it, even worse is if you bypass the wrong vsv, and the anti-return valve between #1 and #2 is open, you could end up with the charge air blasting the wrong way up the compressor and smash the vanes to pieces at the turbine comes on line. Best thing to do is get someone who knows to do it for you, could be expensive otherwise. John, this switchable system you are talking about, is it a kit or a build your own type thing? and have you seen one on a car thats reliably working? Just curious. Chris Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted August 22, 2003 Share Posted August 22, 2003 Wipeout.. keep your car in top condiftion m8! Sad to hear people fiddling with your engine like that. Your car's rare (er) ! Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 22, 2003 Author Share Posted August 22, 2003 I agree. If it was supposed to be in parallel then Toyota would have had the option fitted. I would like to get it back to standard. After removing those 2 mods i found i think it is back to stock. It is a smooth pull all the way to the redline and no sudden pulls like it had before. I will have to get someone who knows a bit more about the engines to take a look. Any one in the Fareham area who can help!! Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted August 22, 2003 Share Posted August 22, 2003 Did you buy Scooters old car? Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 22, 2003 Author Share Posted August 22, 2003 Dunno, Who is scooter? Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted August 22, 2003 Share Posted August 22, 2003 Scooter on this forum.. now has a Blue NA.. hes called Scot.. used to have a White UK 6 speed. Quote Link to comment Share on other sites More sharing options...
Wipeout Posted August 22, 2003 Author Share Posted August 22, 2003 Ye it looks like the same guy. Is that a good thing!!! 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.