GS400V8

iTrader: (4)

I have all the bolt ons with 3.77 gears. I have a dyno tuner and we have pulled fuel for really only a max gain of 10hp for the common "just-below-300whp" mark for these cars.

I love the response and extra power in contrast to the bone stock powertrain. However, I cant feel the difference with the tune, and for some reason the car feels faster with no tune as ive quickly gone back and forth doing many runs. My only theory is running richer helps predetonation? I dont know.

Should I just sell the Neo/Boomslang?

I feel like its money that could possibly be going towards a torque converter which I hope I would feel more.
Any opinions on the tc being worth it? Can you feel it at WOT at all speeds and not just from a stop?

mistagill

What kind of numbers did you put down on the dyno?

GS400V8

iTrader: (4)

I put down roughly 280rwhp/300rwtq on a dyno that was more generous than a "heart-breaker" mustang dyno, but not as generous as a dynojet. This was when I had no X-pipe, no cross-over pipe, and the stock 3.23 rear end. Acceleration feels a lot stronger since then.

Any other opinions? Should I just sell the Apexi Neo?

I have heard some people comment on how much easier the motor delivers the power to the wheel at all speeds because it revs up easier. Maybe it just felt that way to them, or maybe it is just more noticeable from a stop. I would also expect there to be less slippage. Is this just at partial throttle until lock up engages? Now Lextreme doesnt offer re-stalled TCs anymore.

I know people claim people get off the line quicker with a TC, but will I feel it in the 1/4 mile overall or after 60mph?

sakataj

iTrader: (182)

you know other brands make torque convertors like Precision Industries sells one a LOT of OP's use

badblackgs

iTrader: (1)

heres a short video of my car taking off from a stop. yes my car has a supercharger but you get a pretty good idea of the off the line acceleration. its got a precision industries 2,800 stall converter in it.

GS400V8

iTrader: (4)

Yeah but I heard the PI converter runs $700 is that true? And then installation will be a fixed amount whether I borrow a shop or have some one else do it. Id like to try one but really hopefully less than that total amount installed.

Thanks for the video, it looks like the car has a nice leap with it. (It always surprises me that a higher stall wouldnt just roast our cars' tires with the 3.77 diff. Espicially so with your supercharger, you would think it would just spin leading to no change in off the line.)

Will_GS400

iTrader: (1)

I have a '99 GS400, I just picked up a 2800 stall torque converter from Precision Industries. I'll have it installed hopefully next week so I'll let you know how the car performs with it. I'll have a video up as well.

sakataj

iTrader: (182)

i dunno bout there new cost, contact PI and inquire there. will below me picked up a used one for under $300 (now it needs a readjustment but still) how much did the Lextreme one sell for new/used?

you bought the used one from Nanotech, do you mind telling me what you actually got it for?i started to buy it but i didnt wanna buy it for $200-250 and then have to put another $250 into it to rebuild it cause im selling my car and i didnt wanna put much more into it. also what did PI charge you for the rebuild or readjustment? they are literally 10 mins from my Gf's house and i was going to install it i just couldnt ever decide on it

Will_GS400

iTrader: (1)

FYI, I contacted Precision Industries last month about the TQ for our car and this was their price:

I picked up a used one on the forums here for $175. However, it needed a rebuild so I had to sent to Precision. I don't have the official bill from them yet but they estimated $262.50 for the stall change and about $100.00 for the clutch.

GS400V8

iTrader: (4)

The video and feedback would be appreciated, thank you.
I just verified with them the $850, and is way too much IMO when installation would cost me another $300.
No one has ever said they regretted a high stall converter, so I'd like to try one out.

SpectraBlu

iTrader: (1)

I have a PI dragon torque converter with the Supra tt lsd, and definitely can't just floor it without roasting the tires

badblackgs

iTrader: (1)

Ok, so along with the 2,800 stall converter I too have the toyota supra twin turbo rear diff. with 3.73 gears. there are times on certain asphalt that my car will roast the tires at even half throttle. but I also went out of my way to buy huge tires with a sticky compound. and, just before that video was recorded, the car had been idling for 30 minutes which was heat soaking the maf sensor which in turn pulled a bunch of timing on my initial take off. All in all the converter is fun to have. I didnt' want to deal with second hand stuff so I splurged on a brand new PI converter which was just north of 800. Lucky for me I saved by installing it myself. They make ALOT of heat, so you better put in a large efficient trans cooler.

GS400V8

iTrader: (4)

Oh no, I cant floor it either even with my Michelin Pilot Super Sports but it does hook pretty well.

sakataj

iTrader: (182)

yeah thats what i was concerned about and why i didnt get it... $200 for a used TC, Then i was told about $250 for the rebuild and i didnt wanna spend $450 on it. hell your in $537.50 (not counting shipping and importing fees to canada) for that price i think would have bought a new one to get the warranty but either way its not to bad. nice pickup

GSJake

iTrader: (21)

There is a one year warranty on the rebuild.. just like on a new one, so he save some cash..

I have a Dragon converter and while it works excellent in concert with the re-valved valve body and LSD diff, I don't believe this will solve your issues OP.