Lee Hockley Posted January 31, 2002 Share Posted January 31, 2002 Just after I bought the car, I posted for help with regards to my fuel cutting when going over 1 bar. I was advised to get a FCD installed and have booked her in at the end of the month. But I have just been reading that all the FCD does is prevent the cutting event and allows you to continue over boosting until ... KABOOOOM ! What's the point of that ? What I want is to maintain a level of boost that will not blow the old girl up. Is this only a matter of configuring the BC ? Does this device control the maximum amount of boost to a safe yet enjoyable level ? Since the initial incident I have not, at anytime, put my foot to the floor and have been teasing it at about 50-70% .. yet occationally overboost still ! This seems very strange to me. I must be missing something. (Edited by Lee Hockley at 3:03 pm on Jan. 31, 2002) (Edited by Lee Hockley at 3:04 pm on Jan. 31, 2002) Quote Link to comment Share on other sites More sharing options...
GavinL Posted January 31, 2002 Share Posted January 31, 2002 Hi... One thing to bear in mind is that FCD's (of all makes) are used on Supra's without the stock turbo's. Many aftermarket turbo's have the capacity to run much higher boost levels. I appreciate what you are saying about removing the saftey limit, if that concerns you then use Pete Betts FCD which by default re-sets the cut to 18PSI. Alternatively you can set it higher if you wish. Remember that the safe limit is deemed to be 15psi in the first place, that's why Toyota put it in :biggrin: Quote Link to comment Share on other sites More sharing options...
Adam W Posted January 31, 2002 Share Posted January 31, 2002 Quote: from Lee Hockley on 3:02 pm on Jan. 31, 2002[br]But I have just been reading that all the FCD does is prevent the cutting event and allows you to continue over boosting until ... KABOOOOM ! What's the point of that ? What I want is to maintain a level of boost that will not blow the old girl up. Is this only a matter of configuring the BC ? Does this device control the maximum amount of boost to a safe yet enjoyable level ? BC=boost controller, right? If so, then you are absolutely correct - the boost controller allows you to configure boost pressure up to a limit which you specify, the FCD means that this limit no longer has to be within the limit Toyota programmed into the ECU initially. The FCD is in no way a device for controlling or adjusting boost. It just raises the limit before the engines safety system cuts in. Do you have a boost gauge? That's the first thing on the list before you fit an FCD, then you can be sure that you haven't just given your engine a license to boost itself to oblivion. (Edited by Adam Wootten at 4:41 pm on Jan. 31, 2002) Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted January 31, 2002 Share Posted January 31, 2002 look at http://www.trlperformance.com/vfcc.html Most fuel cut devices ONLY remove the fuel cut by, as you suggested, masking the real boost from the ECU. They clamp the boost pressure signal going into the ECU to fool it into thinking there is no problem. There is NOTHING wrong with this BUT!!!!!!! YOU ARE NOW RESPONSIBLE FOR CORRECT ENGINE FUELING AND PROTECTION!!!! (so maybe there is something more to worry about and the engine tuner SHOULD tell you this!) You cannot blame the unit if your engine goes pop! It merely allowing you to get the ECU to do what is was never intended to do, so it's hardly it's fault if it causes damage. For this very reason I designed my VFCC (Voltage Fuel Cut Controller) to have a secondary overboost protection circuit. This effectively means you can RAISE the factory fuel cut to a maximum of 19psi. (it varies between 18->19) This is the limit of your factory MAP (Manifold Absolute Pressure) sensor. Beyond this and the sensor is incapable of measuring the boost accurately and thus the VFCC is also unable to help. You do however have a very safe way to raise the boost on a Supra to around 18psi without any of the concerns above. BUT you must still watch out as in the height of summer and burning hot air temps I would NOT recommend running a stock Supra on 18psi without further mods like a large FMIC or water injection. (Do not rely on water injection, pumps have been known to fail, use it as a safety feature and a belt and braces mod, don't use water injection if you think you can just turn boost up even more! Bad move!) So after all that waffling (phew you all say) an FCD is fine however you must understand what is does and why, and now armed with this information you must make a decision what to do for yourself. I can only advise that as far as I'm aware I'm the only person designing and selling an FCD with this feature and certainly the only one that still sells for far less that even the basic Greddy or HKS units! The information is freely downloaded from my site and you are free to ask questions. I'm a Supra fan through and through. I would ask what unit your "installer" is about to fit? and how much he's charging? For less money you can get something that will put your mind at a little more ease. Regards Pete Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 1, 2002 Author Share Posted February 1, 2002 Ok then. So would it be safe to say that first of all I need to get the BC configured to prevent it hitting the max fuel cut limit rather than getting a FCD installed ? [ Yes, I have a boost gauge (bar) ]. Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 4, 2002 Author Share Posted February 4, 2002 I was going to TDI to get it checked over and for a HKS FC, but I have been advised from a number of quarters not to go there. I have never had any dealings with them myself but I do not want to take the chance, so for now am looking for some help in configuring the BC and sound advice on correcting this issue. Due to this over\under boosting my friends MR2 GTS is taking the p*ss out of me at the moment. I tried to configure it this weekend, with failure, and the problem I was finding was that when going from 2.5k to 7k revs in 3rd I had to release the throttle at points in the run because it was going to overboost (1bar) and when I completed the L and H modes the stock boost registered at 0.61 ... any advice ? (Edited by Lee Hockley at 8:36 am on Feb. 4, 2002) (Edited by Lee Hockley at 8:37 am on Feb. 4, 2002) Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 5, 2002 Share Posted February 5, 2002 What boost controller are you using then? Rgds Pete Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 5, 2002 Author Share Posted February 5, 2002 A HKS EVCIV. The cats are still present. I have just found some more documentation, I will give it a go this weekend. (Edited by Lee Hockley at 1:26 pm on Feb. 5, 2002) Quote Link to comment Share on other sites More sharing options...
mrpug106 Posted February 5, 2002 Share Posted February 5, 2002 >>>I was going to TDI to get it checked over and for a HKS FC, but I have been advised from a number of quarters not to go there....>>>> I must ask Lee...Who and why ? did someone tell you not to go to TDI! when they know what they are doing,and can sort out any problems. Seems strange not to go there! Lance. Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 5, 2002 Author Share Posted February 5, 2002 A few friends in and about town had heard some stories, and I wouldn't want to elaborate on anything that could be construed as slanderous. But I feel that I could perhaps do it myself now. I have managed to get some more information on how to configure the EVC, but it looks like the device cannot maintain a maximum boost level. Does anybody know of another device\upgrade that can maintain a max boost ? (Edited by Lee Hockley at 2:42 pm on Feb. 5, 2002) Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted February 5, 2002 Share Posted February 5, 2002 Quote: from mrpug106 on 2:29 pm on Feb. 5, 2002[br]>>>I was going to TDI to get it checked over and for a HKS FC, but I have been advised from a number of quarters not to go there....>>>> I must ask Lee...Who and why ? did someone tell you not to go to TDI! when they know what they are doing,and can sort out any problems. Seems strange not to go there! Lance. Yes but at what cost ? Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 6, 2002 Author Share Posted February 6, 2002 Now that it looks like that I have the overboosting sorted, I need to get the numbers input to get the best performance. Having said that, I probably will now look for a FCD and perhaps TRL VFCC one is the one to go for ? Justin, when I pop down on Saturday could you bring along a TRL VFCC and maybe a HKS FCD ? And the Valvaloine, please, 8 litres. Cheers. (Edited by Lee Hockley at 4:28 pm on Feb. 6, 2002) Quote Link to comment Share on other sites More sharing options...
GavinL Posted February 6, 2002 Share Posted February 6, 2002 Quote: from Lee Hockley on 10:21 am on Feb. 6, 2002[br] Justin, when I pop down on Saturday could you bring along a Pete Betts and maybe a HKS FCD ? I wouldn't put an HKS FCD on my car if you paid me, go with the Pete Betts or Greddy unit they are much better. Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 6, 2002 Author Share Posted February 6, 2002 Gavin, I have had reservations about them too. But I am told that you can set the cut off to a higher but safe level. Then set your max boost level a little highter. What are your reservations ? Quote Link to comment Share on other sites More sharing options...
GavinL Posted February 6, 2002 Share Posted February 6, 2002 Quote: from Lee Hockley on 12:02 pm on Feb. 6, 2002[br]Gavin, I have had reservations about them too. But I am told that you can set the cut off to a higher but safe level. Then set your max boost level a little highter. What are your reservations ? Hi... There is an article about this on WWW.MKIV.com. It explains why it is thought that the Greddy unit is superior to the HKS. That aside Pete Betts unit offers more than either of these so IMHO it's a bit of a no brainer really. regards..... Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 6, 2002 Author Share Posted February 6, 2002 What that site actually says is that Jesus should be in your life not a Supra. Well then. Does that make me a devil worshiper ? (Edited by Lee Hockley at 12:44 pm on Feb. 6, 2002) Quote Link to comment Share on other sites More sharing options...
Adam W Posted February 6, 2002 Share Posted February 6, 2002 The devil gets all the best cars . . . Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 6, 2002 Share Posted February 6, 2002 just picking holes...but.. > could you bring along a Pete Betts and maybe a HKS FCD ? This should be referred to as the "TRL VFCC" http://www.trlperformance.com/vfcc.html Cheers guys for all the praise anyway :-) regards Pete Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 6, 2002 Author Share Posted February 6, 2002 Ooops. No disrespect Pete. Post edited. (Edited by Lee Hockley at 4:27 pm on Feb. 6, 2002) Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 6, 2002 Share Posted February 6, 2002 >Ooops. No disrespect Pete Absolutely no disrespect taken. It was just that years ago I sold them as a bit of a hobby (hence the Pete Betts bit) but now I'm trying to build up the TRL Performance business so any mention of TRL is better and gives it more credability and safer for you as a customer as it's a Ltd company etc etc. Don't forget if you can't find something for sale doesn't mean it can't be built so TRL are here to help with bespoke electronic designs. Pete Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 6, 2002 Author Share Posted February 6, 2002 Then can you build me a unit that will maintain full boost (no overboosting please) while activated from a dash unit switch ? Purhaps with an auxillary switch to rig up to a nitros kit ? Can you build a 'kit' too ? You know just like night rider had ? Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 7, 2002 Share Posted February 7, 2002 Keep your eye on the best of 10 in July. Not for speed but for my GADGET GEAR car :-) Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 7, 2002 Author Share Posted February 7, 2002 Quote: from TRL Performance on 6:54 am on Feb. 7, 2002[br]Keep your eye on the best of 10 in July. Not for speed but for my GADGET GEAR car :-) I do plan to go to that for sure. I understand that the venue has not been decided yet ? Can you build a revolving number plate ? Activated by radar signals ... could have done with one of those a few weeks ago. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 7, 2002 Share Posted February 7, 2002 >Can you build a revolving number plate ? Actually I know someone whos doing this, for real! He's asked me to provide him with an electrical trigger that operates at 50mph and switches a pop-up headlamp motor on to flip the plate! :-) Quote Link to comment Share on other sites More sharing options...
Lee Hockley Posted February 7, 2002 Author Share Posted February 7, 2002 Nice. So it is well consealed. That would have been a wise investment. I am waiting for my ... punishment. 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.