Tuesday, July 01, 2008 - 07:49 am, by: Richard Johnson(92soarertt)
I upgraded from my PT GT4088 to a Precision Turbo PT74GTS for my little 1JZGTE. That's all fine and dandy. The issue is, transmission? There isn't a single person that I've called that can build a soarer A340e to handle 650 american WHP (high 9s, low 10s).
Everyone tells me to go 5spd, 6spd, or TH400. I know you guys down south have been down this road, help?
Tuesday, July 01, 2008 - 01:13 pm, by: Richard Johnson(92soarertt)
I've already surpassed the 400rwkw mark with the GT4088, that's baby work for a 65mm turbo on a 1JZGTE, on 93 octane pump gas. On the stock automatic.
Doing 500whp is probably the easiest thing to do with a 1JZGTE. All you need is single, 550cc injectors, and an SAFC2. Everyone is doing it around here, it's cheap speed.
As far as my car goes, in the near future I'll be doing a little bigger injectors and a different piggy back. 9mm bigger isn't THAT drastic of an upgrade.
Oh, and you need to do your research, there isn't a better turbo for the JZ motor
Back on subject. For that much money I can V161 convert, or Th400 convert for half that unless anyone has a better idea.
Tuesday, July 01, 2008 - 02:05 pm, by: Jeff Bedsor(Jeff_bedsor)
You want a transmission that will take 500kw, but you don't want to spend $3600. You seem to have all the answers, why bother asking an opinion on here.
Tuesday, July 01, 2008 - 04:28 pm, by: Shane McInnes(Soarin_tt)
Richard Johnson wrote on Tuesday, July 01, 2008 - 01:13 pm:
Doing 500whp is probably the easiest thing to do with a 1JZGTE. All you need is single, 550cc injectors, and an SAFC2. Everyone is doing it around here, it's cheap speed
Hahahahaha if it was that bloody easy everyone would be doing it, Its not easy at all unless you have a happy dyno;)
Tuesday, July 01, 2008 - 04:33 pm, by: Cihan Aday(Cihan)
Richard Johnson wrote on Tuesday, July 01, 2008 - 01:13 pm:
've already surpassed the 400rwkw mark with the GT4088, that's baby work for a 65mm turbo on a 1JZGTE, on 93 octane pump gas. On the stock automatic.
Stock/shift kitted auto's don't hold more than ~280rwkw in Australia. Maybe its the humidity?
Richard Johnson wrote on Tuesday, July 01, 2008 - 01:13 pm:
Doing 500whp is probably the easiest thing to do with a 1JZGTE. All you need is single, 550cc injectors, and an SAFC2. Everyone is doing it around here, it's cheap speed.
We need 650cc injectors to do 400rwkw in Australia. Maybe its because the fuel pumps spin backwards here? Yeah thats it!
Richard Johnson wrote on Tuesday, July 01, 2008 - 01:13 pm:
9mm bigger isn't THAT drastic of an upgrade.
3.14159265.... ring a bell? It's actually a huge difference.
Richard Johnson wrote on Tuesday, July 01, 2008 - 01:13 pm:
Oh, and you need to do your research, there isn't a better turbo for the JZ motor :-)
Tuesday, July 01, 2008 - 06:26 pm, by: Daniel Clarke(Dieseltrain)
550CC injectors max out @ about 340rwkw here in australia as well...
Richard I will ask, DO you really want to keep the 4 speed auto? If your not keen on overdrive, then get the T400 box done!
Otherwise, your lookin at $3500-$3800aus for a box that has been proven to handle Australian 750rwhp And run Flat 10's and into the 9.9's @ 135-145mph in a Cressida!
Tuesday, July 01, 2008 - 07:07 pm, by: Cihan Aday(Cihan)
Vinh Bui wrote on Tuesday, July 01, 2008 - 05:34 pm:
Richard, I think you've got to take into account that your dynos are a lot more friendlier compared to the dynos we use down under...
Huge differences. They're clearly approximating flywheel hp or something along those lines.
Richard is claiming 400rwkw / 540whp running a std automatic, std intake manifold, std soarer fuel pump, mild cams and a SAFC.
1- std auto's don't hold more than 270-280rwkw with a regular flogging. Proven with specifically 3 cars in the last few weeks personally. Morgans held 290rwkw for 2-3 dyno runs. Joes holds 280rwkw then power drops 5kw a run. Camerons held above 330rwkw for 5-10 dyno runs and overheated under the pressure of ONE gearchange with the equiv of 350rwkw.
2- A well designed intake manifold would make a worthy difference and really help achieve the 400rwkw mark. Its just one of the important items you'd need to push this kind of power.
3- Standard soarer pumps lean out after 270rwkw. I've made 290+ rwkw with my personal car on the std pump but it was leaning after 5,000rpm irrespective of injector duty/pressure.
4- 1JZ's need revs to make power like that. 264's at a minimum, anything else is cutting it short. Just another thing which makes Richards claim unlikely.
5- 550's with an SAFC is fine in terms of fuel if you're pushing big boost but i'd expect ignition to be well off ideal after 280-300rwkw in that case.
Richard if you're in fact getting 540+rwhp with the outlined equipment - try another dyno.
Thursday, July 03, 2008 - 09:34 am, by: Richard Johnson(92soarertt)
Well, just to put things in perspective..
When the car was dynoing to the REAR wheels 310hp, or 230kw.. I was running 12.8 @ 108mph. That was on 20psi stock twins and SARD ecu. No other mods.
The same dyno put me a over 500whp, or 375 rear wheel KW. It is a known fact that on a stock cam 1JZGTE, one CC is good for 1RWHP (on american dynos). You can get a list of people doing the magic 500whp mark on MKIV 550's off Supra Forums, with SAFC2's.
Now, did i ever say the transmisson lasted much long after that? No, it didnt. 3rd gear dissapeared. JZZ30 auto's here cost $50-$75 usd.
I always thought you guys were ahead in Aus, but some of these comments are starting to change my mind. There's guys here in Florida that have gone beyond the 1000whp mark on the 1JZGTE. One guy on stock pistons/rods. Again, that's well documented. As far as the turbo I have, the PT74GTS? People are averaging in the 800's.
Thursday, July 03, 2008 - 12:06 pm, by: Maurice Diggler(Mau_rice)
Richard, to be honest you lost all credibility when you tried to convince us that your GT40 turbo spun up just as quickly as stock turbos... haha Surely someone else remembers this?
If your going bigger again, I'd hate to see a boost vs RPM graph, your car would have about 100hp until about 200rpms before redline... What a car.
Thursday, July 03, 2008 - 04:45 pm, by: Shane McInnes(Soarin_tt)
Maurice Diggler wrote on Thursday, July 03, 2008 - 12:06 pm:
Richard, to be honest you lost all credibility when you tried to convince us that your GT40 turbo spun up just as quickly as stock turbos... haha Surely someone else remembers this?
Thursday, July 03, 2008 - 05:16 pm, by: Cihan Aday(Cihan)
Richard Johnson wrote on Thursday, July 03, 2008 - 09:34 am:
I was running 12.8 @ 108mph.
See we do 113-115mph with ~250rwkw here. 107-108mph makes around 200-210rwkw. See the %15 difference? That makes US 500whp about 310-315rwkw here which is in line with Morgans 297rwkw at 22psi running only a 61mm turbo on pump fuel.
The loses on our inertia dynos are higher dependent on the ramp rate, add that into the equation and the difference is significant. At 600whp in the US you're only making 370-380rwkw here. That 15% goes to show why guys in the states are able to make 600 wheel hp with a 60lb turbo (~61mm comp inducer - rated at 600hp at the flywheel by garrett). It's bizarre.
Irrespective of your past track record, i think some of your points are valid in regards to turbo sizing. We do go a little small in AU and don't give enough credit to the 1J so its full potential is hardly realized. Mind you there have been some exceptions, 1JZ747 ran 137+mph with an unopened 1JZ (std cams, pistons rods etc) at 37psi of boost.
Thursday, July 03, 2008 - 05:24 pm, by: Benjamin Burgess(Jampac)
I've tried these figures on 3 different drag calcs for your MPH and for a typical soarer weight they give around 350-360hp flywheel in order to run 108mph, so a 40-50hp transmission loss. I've put the weight in as 3650lbs which would be an average soarer with a below average sized american in it.
So for your 500hp figure, add 50hp to it, and your MPH is then 124.5mph. MV autos gearbox would easily handle that.
Original thread post you want something that'll handle 650rwhp, so say 700hp fly. That gives a 135mph trap speed, which can run a low 10 by the way. Again this trap speed has been done using the MV autos box already mentioned in this thread.
You say you can get a 6 speed box for half that. That maybe true. I'll make you a bet you couldn't run the same times using a manual as what you could with an auto. For a manual you'll need anti-lag and new turbos are not 50-75 US a pop like gearboxs.
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