Tuesday, January 17, 2006 - 03:25 pm, by: Khalid Sarwari(1jzspeed)
hey guys hows it goin i have a dilema on my hands not sure which way to go. i need to put a new tranny in my car i will have roughly 320rwkws out of my car, so i will need a strong rebuilt tranny and at the moment if i want to stay with a auto it will need to be a C4 3speed shift glider (basicaly always shifting up and down)but for the same money i can put a R154 gear box in with a heavey duty clutch. so i dont know which way to go? what would you do i am not bothered about replacing clutchs. please give you opinions and reasons why you would go that way this car is a daily driver still.
Tuesday, January 17, 2006 - 03:37 pm, by: Benjamin Burgess(Jampac)
whats wrong with a340e? I was on the phone with michael at mv autos this morning, very impressed with his knowledge as well, but his quiet confident to be able to build a a340e that can take up to 440rwkw.
I'd suggest calling him and having a chat, his a really helpful guy.
Tuesday, January 17, 2006 - 04:08 pm, by: Khalid Sarwari(1jzspeed)
benjamin he can not garantee that it wont slip at gear change, and all the american race drivers either use a supra 6speed or a c4 or powerglider, so i am not really interested in using the a340e at all no matter how strong people think they can make it cuz it just aint possible to make it strong enough or last long enough.
I know wiser heads believe differently, but if you want to run that 320rwkW down a quarter mile, *odds are* you'd find it easier to get good times with an autobox. I'm only going at this from the point of view that a manual with a beefed up clutch needs better technique all around to get the same result. You *can* get the A340 to hold that power reliably, and Michael would be the guy to do it.
Not being able to guarantee against slippage is axiomatic - how long do you think even a beefed up clutch behind an R154, not to mention the thrust washer, would withstand the abuse of flat shifting through a quarter mile with that power running through it ?
From every other point of view, including daily driving (very clutch dependent on this point), and particularly if you enjoy driving your car, manual is the way to go.
Yes, you can make things unbreakable - at the expense of comfort. Achieving an all around performance car (i.e. daily driven and track) isn't easy, and mandates a fair bit more thought than "... Just slap a big single and a Powerglide on ! ...".
So what are your purposes, and how well do you think you can shift ? The money's yours to burn.
Tuesday, January 17, 2006 - 05:44 pm, by: Khalid Sarwari(1jzspeed)
burn allright and the soarer is the one that does it best.
anyhow back to the topic so shom in relation to drivability and comfort you think the r154 is the way to go with a decent clutch, in relation to shifting iam not to shabby, but more practise will do it justice. goin down the quarter is not my main point of owning the soarer yes i will go down there probably a few times.
Tuesday, January 17, 2006 - 07:45 pm, by: Benjamin Burgess(Jampac)
It’s not just shifting its how you get it off the line and with the manual most people get too much wheel spin, or bog it, you also can’t stall it up ie get it on boost on the line unless you have an antilag system installed on a manual setup. With 320rwkw what times do you expect to run? I would say with a full weight soarer, you'd probably be close to a high 11 with a good 60 ft time. Is this your aim? The other advantage of the auto is it stays on boost when changing gears unlike a manual as you have to lift off the throttle or slightly lift to match revs if you flat shift.
By the way, how much slippage is Michael talking about? Some slippage can be a good thing as it'll make the rest of the driveline behind the gearbox last longer. Shock loadings are terrible for longevity of mechanical parts.
In the end 320rwkw isn't that much compared to the power some of the cars with supra 6 speed and c4's run, and you will not like a built c4 on the street, their terrible, they bang into gear, shocking to park.
Tuesday, January 17, 2006 - 07:55 pm, by: Benjamin Burgess(Jampac)
Just to give you a heads up khalid, I'll be in the same position very soon as the aim of my single turbo setup is to hit 300-320rwkw. However I'll be only doing a 1.5 shift kit and transmission cooler for now on the a340e and possibly a 2800rpm stallie if my 60ft times are terrible. If the box didn't work I'd either beef it up (less likely) or do the conversion to a r154 box, as I already know how to drive manual pretty well, done the 1/4 many times in a manual 200sx.
Tuesday, January 17, 2006 - 08:06 pm, by: Lew Radbourn(Marlew)
Khalid Mate if you are planing on draging all the time Power glide is the way to go there is a guy up here that between 2 workshops we have fitted a 2jz in a VL common whore he was going to run a tricked up C4 but has now run out of finances so i can find out about it if you like i know he was talking about the box and it was guaranteed to hold 1000Hp i will try to find out more info tomorrow about the power glide and C4 for you cheers Lew
Yeah, the C4 in one of my dad's worked Mustangs clunks into gear when you change it. Just like Ben says above... if it doesn't slip, all it can do is ram itself into gear as quickly as possible. Not the most comfortable way to shift.
Friday, January 20, 2006 - 09:14 pm, by: Lew Radbourn(Marlew)
Khalid; Mate just been told a Power glide box tricked up with a bellhousing and converter Guaranteed to hang on to 1000Hp $4000 with a little change cheers Lew
Mate i just read some of the other posts no matter what you do (well you have done it now any way) once you get into the 300 club you are going to sacrifice some of the creature comforts that the soarer has mate But struth it is a shoot load of fun doin it.
Monday, January 23, 2006 - 12:01 pm, by: Chris Davey(Chris_davey)
I am a little confused here. You say your main interest is not drag racing but you want over 300rwkw and are looking at powerglides?
I have talked to a few ford drag racers and they told me that the c4 is not a good choice for a heavy car as they just aren’t that strong.
BTW MV autos have already made the a340e handle 440rwkw in the supercrown. 4.5L turbo 6. That is not daily driven though could be if it was more legal. 1jz747 is also using one and running 10’s with 480rwhp and he has experimented with lockup up the converter at WOT and no drastic consequences. I really don’t see the need for a gearbox swap unless you are aiming for 9’s.
I am going to be running a shift kitted a340e in my 2800lb car with approximately 300rwkw (when sorted ) also. Will see how we go. The reduced weight in my car should help it last longer also.
Anyway, that is my opinion. I think you are crazy going to a glide if drag racing is not primary focus.
Monday, January 23, 2006 - 07:32 pm, by: Lew Radbourn(Marlew)
Mate just been told a Power glide box tricked up with a bellhousing and converter Guaranteed to hang on to 1000Hp Kahlid yes mate it is the 2 speed convertor can be set to what ever you require. mate you are the only person that can tell that as it is a factor of what revs you want it to really take off and what revs your engine is getting good power also what revs your turbos are creating good boost. 3 important factors mate. seeing how you drive the beast- you can only deside call me on the mobile mate i have the number in the work shop or send an email to marlewworkshop@iinet.net.au Lew
Tuesday, January 24, 2006 - 09:31 am, by: Chris Davey(Chris_davey)
Just make sure that the converter is the last thing you do. As the torque converter multiplies torque, if you choose the wrong one then you will be very disappointed. E.g. if you have 0 torque and multiply it by anything then you still have 0 torque. Of course this is the most extreme example possible.
Choosing a torque converter for a small capacity turbocharged engine is IMO one of the most difficult engines to choose one for. Because you basically have very little torque until you hit boost, if your converter stall speed is in this area then you will still be taking off slowly. Also, if you choose one that is too high say 5000rpm and your engine drops to 4700rpm on the gear change then when it is below the 5000rpm it is creating incredible heat which is never a good thing.
I would highly recommend going to a specialist converter shop after all your mods are done and you have driven the car and found out exactly where it starts to make boost, hit full boost etc. This is what I am doing. I am going to go with TCE with an 8” 4000odd rpm stall. I can’t choose mine yet as I still have issues to sort and cams to install which will change the torque curve. The shop will give you a sheet to fill out with a whole heap of data about your car like weight, engine capacity, cams, turbo, boost, N20 or not, diff gears, tyre size, intended use etc.
Also, I was talking to Shane who owns 1jz747 last night and he said that he would preferred a smaller converter with the same stall speed as he has now as it would be a lot more efficient (heat wise) and would most likely allow the trap speeds to be higher also.
Friday, April 07, 2006 - 11:24 am, by: Shane Crichton(1jz747)
heres some food for thought on this topic.
i have run a mv automatics a34oe for 4 years now. no problems. i am making now 510 rwhp. i have done over 160 full noise dyno passes and another 100 passes at the track, plus approx 30000 k's on the street. i have also driven my car to queensland of 4 occasions. some 800k's each way.
still no faults. i sixty foot in the 1.5's and run consistant now 130 mph trap speeds.
compare that to hardcore racing who i greatly respect. they have a full drag setup commodore ute running a full house 1.5jz making 650 rwhp. he has run a 10.24 at 130mph on slicks as apposed to 10.70 130 mph on street tyres, my car will go 10.30 as it sits.
can you drive a power glide from sydney to brisbane with its 6000 stall. i know i wouldnt be doing it.
and for the record i believe seans crown is now making a touch of 450 rwkw and he has had no problems either, his makes about 5 times the amount of torque my set up makes.
my suggestion FROM EXPERIENCE go the mv autos a340e.
Tuesday, April 18, 2006 - 10:06 am, by: Chris Davey(Chris_davey)
As Shane hasn't responded yet, I will. 3400rpm stall done by MV. They use the pajero housing AFAIK to get it to 3400rpm as the stock housing can only go to 3000rpm.
Previous
) also. Will see how we go. The reduced weight in my car should help it last longer also. 
