JH282

iTrader: (4)

Can any T61 users chime in. I used to have a T61 on my NA-T SC300 (R.I.P ) and absolutely loved it, but I have no clue on how it will react on my Aristo 2J. Any advice will be appreciated. I have never owned an automatic so I don't know what to expect.

novak82

its tha same damn motor wat difference could it be ...but tha auto issue lol u gone have to run low boost until u get a built tranny or do a swap... but my advice to u ...2.5 headgasket ....3.2 stroker kit ...and a greddy t88...and give me a call so we can race lol

JH282

iTrader: (4)

Compression, auto vs 5 speed, vehicle weight, make it quite different.

Epik

iTrader: (7)

nope nope and...nope.

8.5:1 compreession in the GTE will cause _slightly_ longer spool up, benefit is you can run more boost safely, but as he noted the auto tranny is not good for much more power than you can make on the GTE's stock 14 psi boost cut anyway. I have been running at about 380rwhp at 13 psi on my twin K26s for the last 2 yrs and beating the everliving ***** out of it, I know it wont take 500 though for sure.

novak, the outdated t88 will take forever to get into the powerband compared to a t61.. even on a 3.2L.

I do regular work on a mk4 Supra with a GT60BB and he is making more power sooner than he did with the stock twins.. stock fuel and he is at 457rwhp at only 15psi...6 speed though so i digress. In other words, a 61 should be a good compromise, may even help the auto out.

Kaiser you wanna chime in?

novak82

hmm i guess i wasnt paying attention to the fact he said its a aristo ..lol my bad ... and i wasnt serious about tha t88 stuff i dont even run one ...ii run a t-61 on one car and im working on the hks twin setup on my new first gen...

but yea ure good as far the motor sense its an aristo instead of a gs300 ure just gonna have tranny issues ..

so ure option are to my knowledge is the boostlogic built tranny ..ipt built tranny (ill be running on this new project) or do a th400 conversion

twojayzee

Im waiting for Kaiser to chime in. I believe he has a 61 on his swap.
Im going to be running a 67, so I cant help.

Edit: I didnt read that epik said the same thing I repeated

JH282

iTrader: (4)

Hmmm, you got a point there. I'm really only looking for 400hp. You guys think I should give the stock twins a try? I just figured I'd do it once and get it over with. I'd hate to swap the motor in and be unsatisfied with the stock set up a month later.

twojayzee

If I were you, I would do the 61 and never look back.

Kaiser

iTrader: (1)

I'm running a BB TO4S 60-1. The difference from a 61 is that it's 1mm smaller and has 2 extra blades to the 61. So the 61 is 4lb per minute more roughly and it is a little more effecient. With a good intercooler the difference will be fairly negligable. A 61 is an excellent choice if you have no plans of an serious updating of the transmission. I reach 365 wheels at about 16psi on 91 pump gas and about 400 wheels at 18psi. However with the stock map sensor I can't get above 18 without running too lean. The BCC is a blessing and a curse.

Spool is very quick and it pulls hard, however I suggest the USDM intake cam swap for the extra flow up top. I've got one in the garage but I've had no time to install it. It has 9 more degrees duration and .04 lift which is about 15whp with stock twins above 4500 rpms. Logically, it should be more than 15 with the higher cfm and more effecient single. The stock twins I've heard can make 350 but you are really blowing hot air by that point. The 365 I roll around town on is in the sweet spot of the turbos effeciency so with the updated cam I'm hoping the higher VE ratio will get me nearer to 400 on pump. Hope that helps.

JH282

iTrader: (4)

OK, so it looks like I'm definitely going single then. An unefficient 350hp on stock twins, and the fact that I have to mutilate my firewall doesn't sound too hot.

Kaiser, on my NA-T the T61 spool was good. I'm surprised you mentioned the spool was very quick. I figured with the lower compression and a less aggressive cam, spool was going to lag a bit. Also, have you looked into methanol injection for your leaning issues? I was running it on my SC. Very good stuff.

Thanks for the input guys!

Kaiser

iTrader: (1)

The spool is probably equal to twins. It's still a 3.0L and in supra terms, it's a small turbo. A 61 is essentially a GT35R compressor with a T4 turbine. I have a .70 AR on the back side, it's ball bearing and I made sure the turbine fins weren't clipped.

I won't run methanol injection to enhance standard boost and timing. I've seen too many pumps seize up and roach the motors. I'd run it to compliment an intercooler, but not to raise the boost higher. To add more fuel I can try turning up the bcc to 4.4v as suggested by a Brit on SupraForums. I can also try removing the pulse dampner and having the injectors serviced. The stock injectors are 440cc and on this type of motor you can pretty much go one cc per hp. I'm nearing the max anyway.