T3-T4B on D16Y8
 

When could I expect spool up on a T3-T04B (T3 turbine .48 and the compressor AR .60 with a 63trim) on my D16Y8 running about 8psi?

Thanks

Mark

Re: T3-T4B on D16Y8
 

Do you guys think it would be too big, would it be real laggy?

Re: T3-T4B on D16Y8
 

if your only planning on running 8psi, you shouldnt get a turbo that big. if your buying it for future plans, you could probably deal with the lag. my buddy has a built y8 with a t3/t4 that makes 2-3 lbs in second gear.. and full boost out of nowhere at 4000 in third. full boost is 17-20psi. get a .48/.60 t3 and you will love it.

Re: T3-T4B on D16Y8
 

Thanks for your input...anyone else?

Re: T3-T4B on D16Y8
 

4500 to 5000 ish

Re: T3-T4B on D16Y8
 

he speaks from experience. he to had t3/t4 on his sohc

Re: T3-T4B on D16Y8
 

Is there a link to his "Finally Boosted" or anything? I don't remember. What kind of numbers did that thing hold down? What were the ar's of that hybrid?


JP

Re: T3-T4B on D16Y8
 

That hits a little late for what I'm looking for, I'd like it to hit at 4000. Would a T3 .48/.60 do that, and where the hell can I find one! Can never find ---- when you actually need one, my exsisting turbo is all craked to ---- and leaking oil.

Re: T3-T4B on D16Y8
 

It was actually a T3/04E 50 trim .48 .60 from cheapturbo
ass dyno showed 280ish whp at 19psi :-*

Re: T3-T4B on D16Y8
 

How about a T3 .48/.50 , when would that spool up on the D16Y8?

Re: T3-T4B on D16Y8
 

should work great

Re: T3-T4B on D16Y8
 

i have a 48/60 on my y8 and in 2nd gear i make full boost 10 psi at 3k, my tunner thinks this turbo is actually to small, if you wana make big numbers...i used to have a 50/63 and that was spooled like at 4.5k, but it hit really hard! dunno where this other person is getting their info, this is a fast spooling turbo...

Re: T3-T4B on D16Y8
 

Huh. Is this the OEM GN turbo, or an aftermarket unit? Those T04B compressor houing specs are awful familiar, but I may be confused - not a GN guy ;)

The T3/T04B hybrid with the usual "stage 3" turbine wheel and "stage 3" .48 AR turbine housing is going to be a good bit laggier because the turbine wheel is a lot bigger and requires more flow to get it up to speed. If you have the OEM Grand National unit, I suspect it would spool up quicker due to smaller turbine side despite having "the same" turbine housing specs.

Re: T3-T4B on D16Y8
 

10.5 psi at 3700rpm in 3rd gear on a d16y8 using the .42/.48. I think your on crack.



JP

Re: T3-T4B on D16Y8
 

W3RD

Re: T3-T4B on D16Y8
 

I run a t3/t04b vtrim with a stage 1 .48 hotside. It's starts spooling at 3k and full boost by 5k, imo it's perfect. Gives you a swift kick in the ass when it hits full boost.

Re: T3-T4B on D16Y8
 

LOL. See, I can never tell the difference in a T3 .48/.60 and then like a hybird .48/.50. The hybrids should be bigger thus more CFM and lag correct? However, the a/r is less in the hybrid. Is there a link to explain this? I only ask because I was going to rock a .63/.60 next, but hybrid might be better for lag control. Thank you! ;) ;D



JP

Re: T3-T4B on D16Y8
 

The v trim has a .63 comp wheel and I know exactly what you mean, I really don't understand it either. Say a .57 trim t04e is bigger then a 60 trim t3. The wheel is definately bigger in the t04e.

Re: T3-T4B on D16Y8
 

what do u think spool up time on a d16y8 wihjt a t3 super 60 .63 tirm be?

Re: T3-T4B on D16Y8
 

i'm currently running t3/t4E 50trim .48ar i must say i'm still very happy with it. previously i ran the t3 60trim, which i think has great mid tourque but top end was kinda weak. also, i dunno if maybe it was a combonation of my parts and suspension but the monster mid tourque of the t3 60trim was almost too much sometimes and i would experience massive wheel hop and smokey burnouts... it took some serious concentration with the throttle.

Re: T3-T4B on D16Y8
 

There you go. Stage 1 turbine wheel = most OEM T3 tubine wheel. It's visibly smaller than the Stage 3 that comes with most T3/T04.

You guys could also yank ~5 degrees timing right before spool, and maybe lean things out a touch in the same region. Should be good for noticeably quicker spool on the big turbines.

Re: T3-T4B on D16Y8
 

How would pulling timing make a turbo spool fast? I thought it was the other way around, more advanced timing will spool it faster

Re: T3-T4B on D16Y8
 

Yea, wouldn't you advance it right before then retard it? Basically reiterating what Jon said. :P


JP

Re: T3-T4B on D16Y8
 

By retarding the ignition you fire the burn later. Instead of expending the most of combustion pressure across the piston face, the exhaust valve opens "earlier" in the combustion reaction, and you shift a larger portion of the burn out into the exhaust. Spending more of the thermodynamic load across the turbine. Spool city.

84mm B16, SC61, possible to spool a whole 2000 rpms sooner. Complaints of poor off-boost response because of it, but the guy doing the tuning is a real fucktard. I've not had a personal boost-pig with a huge turbine to play with, and I've not wanted to risk overheating the exhaust valves/hotspots/pre-det on a couple of customer's cars by playing mad witchdoctor on their tune w/ no basis of personal experience. Yeah, I yank a couple degrees then feed it back in when the boost comes up, but nothing major.

Re: T3-T4B on D16Y8
 

I think I get you. It loads the cylinder then the explosion is more powerful and forceful by retarding the firing thus allowing it to fill more, right?


JP

Re: T3-T4B on D16Y8
 

No, that's not what he said.

Basically you are sending more of the energy out the exhaust port, instead of against the piston and to the wheels. In an N/A car this would just be lost energy, but this "lost" energy now spools the turbo up quicker.

Joe dude you rock, tell me some more ---- I don't know

Re: T3-T4B on D16Y8
 

Ahhhhhhhhhhhh, I see!!!!!!!! That helped out a TON! Thanks bro. ;) ;D Is this the same as FTL or MSD 2-step? Same basic priniciple?


JP