Ryan.G

Thats Exhaust pressure before the turbo... Its labbeled IPP1 which is logged at 40hz so it logs up all the turbulence from the ports which create the movement

How Rich Luke

Yes bud. I like to be different

Its not a 2JZ .... Its a 1UZFE

How does it drive? I dont think i will ever drive a supra with an engine more suited for road use. It like a TDI on steriods!

I dont have groupies like you bud who can do this while im mapping

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.

Imagine going sideways down a tight B road at 135mph while trying to watch a laptop as well as being pushed into your seat by about 1.5g. All i will say is it was more an orgasm than scream!

You can also see where the turbos are surging at the start of the run.

Probably im still half asleep this time of the morning .. T67 is still to big for a FIC though.. Give me a ring over the weekend though Steve and go through some options for whats next Ryan - 07812786303

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

No

Back working over in Madrid for 3 days and then having a few days off to see parts of Spain. If you need me in a rush then txt me and will try and use the shops Skype to call back as only 1 p a minute then Ryan

"Great for bpu Supras and small singles " not a big twin supra! I also state that they are no good for Anything over 650cc injectors. With your setup you will need much bigger than that. I'm sorry you got the wrong end of the stick on that ad but speak to a mapper of your choice before ever purchasing things. I had a guy beg me to map his megasquirt the other day and offered a stupid amount of money to do it but it's not worth risking my rep. Ryan

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

Good point mr Greenside. Will get machine shop to look at it

Yes Ed, it's an ls400 item, got 2 spare now if you want to pop down and get one

Update: Got some time on sunday to get the knackered engine out and slap in another bog standard 1uzfe.... This time with the turbo's Changed over the diff last night also to a Auto TT one and hoping to map it late thursday night. Took for a test drive tonight and it feels and sounds unbelivable!! Few pics My other spare engine is off for machining next week to fit some forged pistons and rods for the next step when i get bored. I seriously considering going mental with the forged lump and sticking two gt35's on it

For your new bits 2 hours should be fine as i have done many cars that spec now with those injectors but at the end of the day bud it takes as long as it takes to make sure its 100%. Contact via phone for Mapping prices as all different for different specs. Ryan -07812786303

Hi Mike I hire out TDI every month at the moment for all the big power stuff. Its £90 an hour to hire it out and thats from when the wheels start turning. Ryan

Be from 12-4 After looking at your setup i wouldn't want to even chance it with an Aem FIC on a build like that. Needs a full standalone! Sorry i cant help mate but i dont understand why people spend thousands on an engine and then finish it off with a piggyback ecu. Piggybacks are fine for BPU's but not a big twins or single project. Its like building a house and then not putting the roof on it! Ryan

Hired out TDI's Dyno on Monday the 13th and have 2 slots available for mapping. If you want to book a slot let me know. Ryan

Enjoy!

I think he is ready for Full power now Only 2bar a the moment so time to ramp it up to 2.4bar in 2nd gear and lean it off abit. Just hope the rain holds off tomorrow for the finals. You coming down mate? Ryan

8.7!!!!