Vaughany Posted April 28, 2005 Share Posted April 28, 2005 I am currently undergoing a Single Turbo Conversion, my fuelling mods are as follows * Walbro 341 Fuel Pump * Aeromotive FPR * PE 650cc Injectors for J-Spec Fuel Rail I will be using stock fuel lines etc and have not had the 12v fuel mod done yet. My turbo will be the PHR Stage 1 Kit. I would be grateful if someone could answer the following. Would it be advised to do the following * Uprate Fuel Lines * Run Twin Walbro Fuel Pumps * Run the 12v Mod I did not budget for the above and even though I am sure these wont break the bank but you can imagine, alot of little bits soon add up to alot of money. With this turbo (simular to the BL61 Kit I suppose) are these mods essential, or are they something that can wait . Cheers Quote Link to comment Share on other sites More sharing options...
foodfreak Posted April 28, 2005 Share Posted April 28, 2005 That's virtually the same set up as mine, should be ok.. more importantly, how are you going to control the extra fueling? .. e-manage? Quote Link to comment Share on other sites More sharing options...
Vaughany Posted April 28, 2005 Author Share Posted April 28, 2005 Food Freak, Yes mate, I have the Emanage. This topic raised my concerns as all the Americans are running dual pumps and I was not sure what the members on here with singles were running. When you had your car mapped, was there any fuelling problems and what boost were you running. Cheers Quote Link to comment Share on other sites More sharing options...
foodfreak Posted April 28, 2005 Share Posted April 28, 2005 I'm running 1.4 bar at the moment, & ive got the Map ecu. I did try the S-afc but it could'nt take out enough fuel. have'nt fully mapped yet but getting close, just need to trim out a little at the top end. Just bear in mind, mine's a VVTi....makes a difference John BTW......it's much, much better than the stock twins Quote Link to comment Share on other sites More sharing options...
eyefi Posted April 28, 2005 Share Posted April 28, 2005 should be alright, depends what boost you're wanting to run. when logging just keep an extra eye out for fuel pressure dropping (or staying the same) while boost rises. you obviously need a pressure sensor in the fuel line (pre FPR) to do this Quote Link to comment Share on other sites More sharing options...
eyefi Posted April 28, 2005 Share Posted April 28, 2005 personally i wouldn't run the 12v mod unless i absolutely had to. Quote Link to comment Share on other sites More sharing options...
CJ Posted April 28, 2005 Share Posted April 28, 2005 I have twin walbro pumps but, as dude said to me, it was more for insurance just in case rather than necessity. BTW, I run a T67 with 720cc injectors so I think you will be fine with the one pump. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted April 28, 2005 Share Posted April 28, 2005 We have seen a single pump run a T67 Quote Link to comment Share on other sites More sharing options...
Vaughany Posted April 28, 2005 Author Share Posted April 28, 2005 Thanks everyone, thats a bit of money saved there then. Now I need to decide what to spend this on. I knopw I should start another post but what is everyones opinion on a Oil Catch Can, are they required for a single? Cheers again for the info Quote Link to comment Share on other sites More sharing options...
Guest pwpanas Posted April 29, 2005 Share Posted April 29, 2005 I have twin walbro pumps but, as dude said to me, it was more for insurance just in case rather than necessity. BTW, I run a T67 with 720cc injectors so I think you will be fine with the one pump.You will only be fine with one pump up to the boost level that produces about 600rwhp (6spd). After that, you will begin to run lean as you max out the total volume that one pump can supply. Since a 2jz-gte with a T67 at 30psi and HKS 264 cams (for example) has proven that it can produce over 725rwhp, you may need to consider running dual pumps. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted April 29, 2005 Share Posted April 29, 2005 You will only be fine with one pump up to the boost level that produces about 600rwhp (6spd). After that, you will begin to run lean as you max out the total volume that one pump can supply. Since a 2jz-gte with a T67 at 30psi and HKS 264 cams (for example) has proven that it can produce over 725rwhp, you may need to consider running dual pumps. Phil what on earth are you doing here Quote Link to comment Share on other sites More sharing options...
Guest pwpanas Posted April 29, 2005 Share Posted April 29, 2005 Phil what on earth are you doing here um...I guess my addiction to Supra-related information is not limited to US-based forums. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted April 29, 2005 Share Posted April 29, 2005 um...I guess my addiction to Supra-related information drives me to subscribing to forums beyond 'the colonies' A man of your calibre is always welcome this side Quote Link to comment Share on other sites More sharing options...
Guest pwpanas Posted April 29, 2005 Share Posted April 29, 2005 A man of your calibre is always welcome this side Many thanks - glad to be here! ...and coming from you that means a lot! Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 29, 2005 Share Posted April 29, 2005 You will only be fine with one pump up to the boost level that produces about 600rwhp (6spd). After that, you will begin to run lean as you max out the total volume that one pump can supply. Since a 2jz-gte with a T67 at 30psi and HKS 264 cams (for example) has proven that it can produce over 725rwhp, you may need to consider running dual pumps. Yum, 30psi... 2 bar of boost, that's crazy I think my 720's would run out of duty before the pump runs out of puff. -Ian Quote Link to comment Share on other sites More sharing options...
Guest pwpanas Posted April 29, 2005 Share Posted April 29, 2005 Yum, 30psi... 2 bar of boost, that's crazy I think my 720's would run out of duty before the pump runs out of puff. -IanThe 720s would be fine for at least 700rwhp (although I agree it'd be about 90% duty cycle at that point). This is well over the point that one fuel pump can flow. Again, it all depends how much boost you plan to run. Also note that 720cc injectors are commonly supplied in 'full' fuel system upgrades that include a extra lines and a 2nd fuel pump. Imo, running 720s with only one fuel pump is an unusual setup. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted April 29, 2005 Share Posted April 29, 2005 This is well over the point that one fuel pump can flow. Again, it all depends how much boost you plan to run. and what voltage to the pump Another story My orginal comment about a T67 on a single pump was supposed to be in the context of street driving. My bad:thumbs: Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 29, 2005 Share Posted April 29, 2005 The 720s would be fine for at least 700rwhp (although I agree it'd be about 90% duty cycle at that point). This is well over the point that one fuel pump can flow. Again, it all depends how much boost you plan to run. Also note that 720cc injectors are commonly supplied in 'full' fuel system upgrades that include a extra lines and a 2nd fuel pump. Imo, running 720s with only one fuel pump is an unusual setup. Aye, well I went for the full fuel system, HKS rail, twin entry -6 lines coming from a -8 main fuel line which was fed by a pair of Walbros, Aeromotive FPR etc, but I had a bizarre misfire problem and knocking the pump system down to just one pump was part of the troubleshooting, especially as by this point I knew one pump would be fine. Hence the unusual setup As I'm running a max of 1.4bar on pump fuel that's fine for me for now, but I have the components and the experience to up it to twin pump again if I need to - not likely, as I'm a coward and I like my stock bottom end too much Currently I'm seeing 75% duty at 6500rpm, 1.2bar, 11.7:1 afrs. Should be good for 24psi of boost at 90% duty, dunno if that will quite equate to 700rwhp as I've got about 500 at the moment! But that's just theoretical calcs, not experience... As Terry says, for street one pump is fine, this setup is fast enough for me on the road! -Ian Quote Link to comment Share on other sites More sharing options...
Guest pwpanas Posted April 29, 2005 Share Posted April 29, 2005 Aye, well I went for the full fuel system, HKS rail, twin entry -6 lines coming from a -8 main fuel line which was fed by a pair of Walbros, Aeromotive FPR etc, but I had a bizarre misfire problem and knocking the pump system down to just one pump was part of the troubleshooting, especially as by this point I knew one pump would be fine. Hence the unusual setup As I'm running a max of 1.4bar on pump fuel that's fine for me for now, but I have the components and the experience to up it to twin pump again if I need to - not likely, as I'm a coward and I like my stock bottom end too much Currently I'm seeing 75% duty at 6500rpm, 1.2bar, 11.7:1 afrs. Should be good for 24psi of boost at 90% duty, dunno if that will quite equate to 700rwhp as I've got about 500 at the moment! But that's just theoretical calcs, not experience... As Terry says, for street one pump is fine, this setup is fast enough for me on the road! -Ian ...just another couple of data points that might be relevant. A friend of mine made 678rwhp with a T04R (67mm) turbo, oem cams and 720cc injectors a few years back. I don't know what his duty cycle was at the time, but he was running about 28psi of boost with a VPC, an SFC fuel controller, and a g-Force upgraded oem ecu. Noel Samuels also made 729rwhp with a T04R, but he had HKS 264 cams. I don't know what size injectors he used for that run. More T04R (67mm) and PTE67dyno results at this link. Quote Link to comment Share on other sites More sharing options...
CJ Posted April 29, 2005 Share Posted April 29, 2005 Its interesting to note that had a Brit posted those BHP figures on the BBS, he would have been ridiculed and yet coming from an American, we accept this as being OK. Please dont think that is meant as a slight to pwpanas but just an observation. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted April 29, 2005 Share Posted April 29, 2005 CJ I am sure Phil knows that we load our dynos Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 29, 2005 Share Posted April 29, 2005 ...just another couple of data points that might be relevant. A friend of mine made 678rwhp with a T04R (67mm) turbo, oem cams and 720cc injectors a few years back. I don't know what his duty cycle was at the time, but he was running about 28psi of boost with a VPC, an SFC fuel controller, and a g-Force upgraded oem ecu. Noel Samuels also made 729rwhp with a T04R, but he had HKS 264 cams. I don't know what size injectors he used for that run. More T04R (67mm) and PTE67dyno results at this link. Stop tempting me to run more boost I've got the cams too argh make him stop... -Ian Quote Link to comment Share on other sites More sharing options...
Vaughany Posted April 30, 2005 Author Share Posted April 30, 2005 Thanks everyone Pwpanas, I will be running the PHR Stage 1 and will hopefully be running about 550bhp at the flywheel. My setup will be 650cc injectors, Aeromotive FPR and a walbro fuel pump. In your opinion should this be able to supply enough fuel for the planned power. I am only planning to run as a street car and dont want to have run dual pumps etc unless I really have to. Cheers Quote Link to comment Share on other sites More sharing options...
Guest pwpanas Posted April 30, 2005 Share Posted April 30, 2005 Thanks everyone Pwpanas, I will be running the PHR Stage 1 and will hopefully be running about 550bhp at the flywheel. My setup will be 650cc injectors, Aeromotive FPR and a walbro fuel pump. In your opinion should this be able to supply enough fuel for the planned power. I am only planning to run as a street car and dont want to have run dual pumps etc unless I really have to. Cheers Fwiw, I am certain (assuming proper installation, defect-free components, etc.) that your planned fuel system will deliver enough fuel for your planned horsepower level. In fact, it would be fine for considerably more than that: up to 550bhp at the wheels. Somewhere between 550 and 600rwhp your fuel pump would become the limiting factor. P.S. Love your sig. Quote Link to comment Share on other sites More sharing options...
Vaughany Posted April 30, 2005 Author Share Posted April 30, 2005 pwpanas thanks mate, glad you like the sig, it is something similar to a motto we used from my army days. I think it sums up the Supra PERFECTLY Thanks again for the info. Quote Link to comment Share on other sites More sharing options...
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