johnny g Posted June 7, 2011 Share Posted June 7, 2011 Super-keen to see the response and power of these turbos. Hopefully the new F1 turbo engines will really bring on the turbo technology. Quote Link to comment Share on other sites More sharing options...
spider2123 Posted June 7, 2011 Share Posted June 7, 2011 engine bay looks mean mate. is it best to go genuine with the water pump? price? cheers Quote Link to comment Share on other sites More sharing options...
EdMorris Posted June 7, 2011 Share Posted June 7, 2011 By the way Ryan, is your power steering reservoir a 1uz item or a supra item made to fit? Quote Link to comment Share on other sites More sharing options...
greeny Posted June 7, 2011 Share Posted June 7, 2011 Make sure you check and smooth any sharp edges on the Ross piston crowns. A set I had for the mr2 years ago needed some work before fitting. May be better nowadays Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 8, 2011 Author Share Posted June 8, 2011 By the way Ryan, is your power steering reservoir a 1uz item or a supra item made to fit? Yes Ed, it's an ls400 item, got 2 spare now if you want to pop down and get one Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 8, 2011 Author Share Posted June 8, 2011 Make sure you check and smooth any sharp edges on the Ross piston crowns. A set I had for the mr2 years ago needed some work before fitting. May be better nowadays Good point mr Greenside. Will get machine shop to look at it Quote Link to comment Share on other sites More sharing options...
StuartW Posted June 9, 2011 Share Posted June 9, 2011 Only just spotted this project Ryan! Read from start to now....All of this going on between you being a major part in the 8 sec street drag Supra ;-) So is this engine not a multi valve? if its a 16 valve V8 then it CAN be used in Pro mod and ALL the MSA Drag classes!! Forget twin GT35R's...Twin T67's?? Keep up the great work matey (";) Subscribed. Quote Link to comment Share on other sites More sharing options...
TRD DAN Posted June 9, 2011 Share Posted June 9, 2011 i believe there 48 valve quad cams dude dan Quote Link to comment Share on other sites More sharing options...
JamieP Posted June 9, 2011 Share Posted June 9, 2011 How did tonights mapping go bud? i believe there 48 valve quad cams dude dan 32 valve. Quote Link to comment Share on other sites More sharing options...
TRD DAN Posted June 9, 2011 Share Posted June 9, 2011 sorry my bad was trying to rememember Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 9, 2011 Author Share Posted June 9, 2011 Well Finally got the car on the dyno tonight and although the engine etc was perfect im going to have to redesign the way im running the vnt turbos. With VNT turbos you should not need the use of a wastegate as the turbo choice should be selected to match the engine size and power output based on its back pressure as with VNT's when the valves are closed although it causes the turbo to spin up quick it also has alot of back pressure causing the boost to be low. (same idea as a restrictor ring on a BPU) Then opening the vanes increases the efficiency of the turbo and pressure + Power... Well the issue i have is that the boost pressure is that low that its not enough manifold pressure to fully up the valves and hence ruining the Volume efficiency of the engine as the valves are staying nearly closed. So im going to redesign the piping now so that the vane control is driven off the exhaust pressure as well as monitoring the exhaust pressure pre and post turbo. Its all good stuff though but just takes time but at 0.4 it made 430ftlb at 4000 rpm and 366bhp at 6rpm but the top end is crap at the moment due to the vanes being pretty much closed I might have to go bigger though still as where it spools up fully by 1900rpm the engine compressor surges badly Awesome turbos either way. Will get there though and im confident to say no supra will have such a torque curve when its done Quote Link to comment Share on other sites More sharing options...
Homer Posted June 9, 2011 Share Posted June 9, 2011 All the fun of trying something completely new Power figures are looking very good though. Do you have a dyno plot you can post at this stage? It'd be interesting to see how it's going even with the issues you've found. Quote Link to comment Share on other sites More sharing options...
johnny g Posted June 9, 2011 Share Posted June 9, 2011 What's the biggest turbos you can get in the VNT config? Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 10, 2011 Author Share Posted June 10, 2011 All the fun of trying something completely new Power figures are looking very good though. Do you have a dyno plot you can post at this stage? It'd be interesting to see how it's going even with the issues you've found. Actually just looked at the graph again and its only 0.3bar of boost see below.... Flywheel and torque, FLywheel and boost. When the boost drops the vains open up and you can see the torque shoot up. Im going to manually open up the vain fully and see what boost it hits with the wastegate blocked off. If its still got too much back pressure and not making enough boost for over 450bhp im going to strap a set of Gt28RS turbos on there as these will just bolt on and do 400bhp each. But im confident these Vnt's wont let me down Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 10, 2011 Author Share Posted June 10, 2011 You can also see where the turbos are surging at the start of the run. Quote Link to comment Share on other sites More sharing options...
JamieP Posted June 13, 2011 Share Posted June 13, 2011 Ryan just called me, at 0.9 bar, 499bhp with 565 ftlb at just 3800rpm. Great result mate, i bet that will be a good drive home, the car sounded amazing today. Quote Link to comment Share on other sites More sharing options...
Bailey. Posted June 13, 2011 Share Posted June 13, 2011 Ryan just called me, at 0.9 bar, 499bhp with 565 ftlb at just 3800rpm. Great result mate, i bet that will be a good drive home, the car sounded amazing today. christ thats insane, well done Ryan, is he leaving it as 0.9? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 13, 2011 Share Posted June 13, 2011 That'll be a cracking drive. Quote Link to comment Share on other sites More sharing options...
EdMorris Posted June 13, 2011 Share Posted June 13, 2011 Great result indeed. Quote Link to comment Share on other sites More sharing options...
Kirk Posted June 13, 2011 Share Posted June 13, 2011 Ryan just called me, at 0.9 bar, 499bhp with 565 ftlb at just 3800rpm. Christ Quote Link to comment Share on other sites More sharing options...
Callaway Motorsport Posted June 13, 2011 Share Posted June 13, 2011 Awesome result. Love to see that beast running in a vid now Quote Link to comment Share on other sites More sharing options...
Ibrar Jabbar Posted June 13, 2011 Share Posted June 13, 2011 Superb result, I would love to go this route with mine Quote Link to comment Share on other sites More sharing options...
StuartW Posted June 13, 2011 Share Posted June 13, 2011 Vids Vids? Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 13, 2011 Author Share Posted June 13, 2011 Well certainly learn't alot about VNT's in the last week. With VNT's you dont need to run a wastegate as the vane angle controls the turbine speed and hence boost pressure.... Closing the vanes increases turbine speed and opening reduces. Now in order you set up VNT's properly you need to monitor exhaust manifold pressure to work out the exhaust pressure vs manifold pressure that works best and is most efficient. Closing the vanes creates alot of back pressure and too much back pressure kills an engines volume efficiency so with VNT's Big boost is not always the best.... I also took the time to monitor the exhaust pressure post turbo to see how much a restriction my quiet exhaust was.. It measured 0.5bar at 6k which is massive and as soon as im back from madrid i will be acting the flow issues in the exhaust system. Whe running a VNT turbo you must ensure your ecu has a closed loop wastegate control system to keep the manifold pressure equal in all loads as different loads (gears) effect turbine speed masssively! The car made today 499bhp and 565fltb at as Jamie said 0.9bar! Any more boost and the exhaust pressures were going abit high and killing the breathing of the engine as well increasing the chance of det. My next moves are Water Injection to keep the vanes abit cooler as well as aiming to get the exhaust back box pressure down to 0.2bar max! To measure back pressure guys the best way is to use a brake line fitting welded onto the exhaust where you want to monitor and then running some copper pipe coiled up to a transducer like below With these extras im hoping to get my target of 550bhp and 600ftlb Attached is some data which others might find interesting Dyno Graph showing Bhp and Torque Dyno Graph showing Bhp vs Exhaust pressure post turbo Log from ecu - shows the exhaust back pressure and how it relates to boost pressure and vane angle. Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted June 13, 2011 Author Share Posted June 13, 2011 Vids Vids? I dont have groupies like you bud who can do this while im mapping Quote Link to comment Share on other sites More sharing options...
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