Hey whats up Last week I bought my turbo from Hondadriven.net. I was going to get a precision sc-34 but when I was talking to marc he told me to go bigger since it was the same price and that way I could get more power out of lower psi so I wouldnt crack a sleeve. I'm shooting for 300-350 whp. Marc finally told me to go with a Precision sc-60 .63/.76. Since I was new to turbos I thought it would be good but now as I think of it I'm wondering if this turbo is to big for my d16z6. I was considering selling and getting the same one but with a .48 a/r. All I'm really asking is will I be ok wiht the currnet turbo or before I use it should I sell it and get a .48 My setup is the following with a 3 inch dp and 3 inch dp back exhaust no cat.
-----Engine Block
Srp 9-1 Pistons
Eagle Rods
----Engine Head
Crower Valve springs
Crower Titanim Retainers
Stainless Steel oversized valves
-----Turbo Setup
550cc Injectors
Equal length
3 inch downpipe
Hondata s200b with boost option
Tial Wastegate 38mm

 

Wastegate's too small and you're about to become the Mayor of Lagville.

 

Thats what i was afraid of what do you think my lag will be?

 

Is your head ported?

 

I've got a .48a/r on the hot side and .60 on the cold side and I don't even reach full boost until just after 4000rpm. This is on a stock LS motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booosted16 &raquo;</TD></TR><TR><TD CLASS="quote">Thats what i was afraid of what do you think my lag will be?</TD></TR></TABLE>

With a .63, I'd imagine somewhere around 5krpm. Unless you rev over 9k (remember that it won't take as long in 2nd gear +) it's really not worth it. Higher A/R's pretty much translate to "more lag, but more top end power". I'd also say that who ever reccomended that to you initally, is trying to put their kids through college. HTH

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Wastegate's too small</TD></TR></TABLE>

It will be fine.

And why are you going to run low boost? Are you just talking about break-in or something? You built your motor low compression for a reason, run 10 lbs. daily and 15 lbs. at the track.

I would say that turbo is definately too big, your first choice seems perfect.

 

I feel that the 38mm WG is too small. I don't feel that such a small waste gate will be able to corral the pressures either of the post creators considered turbos could produce and will inevitably fail.

 

38mm will be fine, but i can't imagine that turbo hitting full boost till around 5500 atleast.

 

No, there is no doubt, that turbo is too big!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slim9300 &raquo;</TD></TR><TR><TD CLASS="quote">No, there is no doubt, that turbo is too big!</TD></TR></TABLE>

Hear hear! All in favor of "Too Big" say "I"...lol. lets see how many POV's it takes to convince this guy.

 

I'm talking to marc now i might just buy a .48 a/r and switch them

 

even with the .48 it is gunna be pretty damn laggy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booosted16 &raquo;</TD></TR><TR><TD CLASS="quote">I'm talking to marc now i might just buy a .48 a/r and switch them</TD></TR></TABLE>

I'm not trying to make you feel bad or anything, but the SC60 with a".76" which I translated to a 76 trim is waaaaaaaaaaaaaaaaaaaaaaaaaay too big. Even if you were referring to .76A/R on the compressor side it's still absolutely huge for a D16.

If I were in your shoes, I'd downsize on the turbo. What you're looking at is built B20/H22 spec. It's about the same size of a T64 which is Supra spec.

 

.63 AR turbine has been dyno and dragstrip proven to make more power and a "faster" car on a D16 than a .48 AR turbine. That said, it's a laggy laggy thing... if you're building a street car you will find the driveability a LOT better with a .48 AR and you don't lose that much power from the switch off of what a streetcar would run. Don't know about you, but I hate going from a 30 roll against a WS6 and having the guy pull me two cars before I'm fully spooled and passing him. I'd go with the SC34, which is just a regular T3/4 with ported housings (you can do that yourself hint hint).

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stu &raquo;</TD></TR><TR><TD CLASS="quote">I've got a .48a/r on the hot side and .60 on the cold side and I don't even reach full boost until just after 4000rpm. This is on a stock LS motor.</TD></TR></TABLE>

That might have a reflection on the fact you're in Denver where the air is thinner, but in Asheville, half your elevation, I spool a .60/63 T3 by 3000 rpms and have full boost before 3500 rpms. I've run .50/.48, .50/.63, and .60/.48 on my LS engine, with the .48 housing I spool around 2500 rpms. It isn't that much different at 6000 ft elevation when I cruise the parkway, although the power is noticeable less due to less ambient air pressure.

Keep in mind OEM T3 turbines have what Turbonetics calls a "stage 1" wheel and the generic aftermarket T3/4 hybrids get a "stage 3" turbine wheel which is a little laggier. If you are speaking of a straight T3 like I am, I'd look to my AFR and ignition timing at/before boost transition and to charge pipe leaks. Your **** shouldn't spool fully that late.

 

ok What turbo do you think I should get...I'm looking for about 350whp....I was going to get the sc34 but I was scared that it would be to much psi for the stock sleeves thats why I went with the bigger turbo hoping that I could lower the psi...I know its all in the tunning but anything I could do to help I was trying to do...SO I defently want to stick with Precision turbos. but which one. The car is mainly a night car like I'll usally take it out and roll with it after work. BUT I defently want to go to the track once I get some slicks and get some times. Since I have an upgraded head I'm going to change the rev cut out to 8200. So I really want a turbo that can reach full boost low and pull hard all the way to the end.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1316130057 &raquo;</TD></TR><TR><TD CLASS="quote">

I'm not trying to make you feel bad or anything, but the SC60 with a".76" which I translated to a 76 trim is waaaaaaaaaaaaaaaaaaaaaaaaaay too big. Even if you were referring to .76A/R on the compressor side it's still absolutely huge for a D16.

If I were in your shoes, I'd downsize on the turbo. What you're looking at is built B20/H22 spec. It's about the same size of a T64 which is Supra spec.</TD></TR></TABLE>

A 76 trim T31 wheel is a Stage 3 turbine wheel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicRyda2k &raquo;</TD></TR><TR><TD CLASS="quote">

A 76 trim T31 wheel is a Stage 3 turbine wheel.</TD></TR></TABLE>
thats affirmative...
what kind of boost is required to make 350wheel?
that stage 3 in a .63 shouldnt be all that bad...
laggy but still streetable.
and the 38mm is not to small.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GT61 this 1.8t &raquo;</TD></TR><TR><TD CLASS="quote">
thats affirmative...
what kind of boost is required to make 350wheel?
that stage 3 in a .63 shouldnt be all that bad...
laggy but still streetable.
and the 38mm is not to small.</TD></TR></TABLE>

that's what I was telling him...

An SC60 is basically a T3/60-1 Hi-Fi (T04E compressor housing vs T04S)

the turbine specs on his turbo are
T3 .63 a/r housing
Stage III Turbine wheel (AKA 76 trim T31)

now a 76 trim T04 wheel is HUGE. if i remember right a 76 Trim T04 wheel is a P-trim... now THAT is way too big for a sohc.

 

Running more PSI is not what kills your cylinders. POWER is what kills cylinders. Get a SC50. It's more practicle for your application. But on the other hand you don't really need to buy a precision turbo. You can get a smaller garrett turbo designed for you application with smaller A/R's that will be cheaper too....