Nextelbuddy

well im upgrading my t3/t4oE. i dont know really what would be a good turbo to upgrade to there are so many choices out there. i dotn even know the specs on my turbo now lol. the only numebrs on it are A/R .50 thats it i cant see anythign else. all i really know about this turbo is that it reaches full spool at about 4800 rpms. i am working for 450-500 to the wheels now and hopefully 600 after summer time.

i see all types of sc61's on the net with different a/r numbers and stuff. i see others that say they have t3/t4oe housings... but that scares me i dont want another t3/t4 turbo. can anyone help me pic a good turbo??

TurboBumblBee

i would like to know this as well.. i have a drag kit on my car now and the person who owned it before me (my roommate) blew the seals on the drag turbo.. i havent gotten it tuned yet but i know its a turbonetics .60 a/r and .48 a/r (i think this is hidden on the other side of the turbo)

give us more infomation on turbos..


and nextel thanks for all the help getting my car running 2 weeks ago, i know it might have been alot but its running good after regapin the plugs cause one was WAY off..

IvanB

try this link, you put in your engine specs and desired boost, it will tell you what turbo is best...

http://www.turbofast.com.au/TFmatch.html


Well considering you guys have 2000 posts each you probably know of that link and more, so perhaps the link i gave is just more useful to folks like me that might be lurking




Modified by IvanB at 10:37 PM 4/7/2004

HaRrYbOy

BUMP because I want to know also...

Nextelbuddy

thanx for that site doesnt relaly help me that much though those are nothign but garrett turbos and the HP numbers it spits out are PRACTICAL numbers lol. i a turbho that will put out more power in the future so i dont have to upgrade again.

i am torn between t3 60-1 or the sc61.. either one would make me happy but i dont know what trim to get.

bgsxyguy

well basically A/R ratio is the area/radius ratio on the turbine and the compresser housings i hope that helps sryy if that wasnt what u were lookin for or if i didnt understand the answer u were lookin for

Rod.

I would talk to Arturbo. I had a t3/to4 turbo also. I am upgrading to the sc61. 63 ar stage 5 wheel. I want more power out of my setup .

boosted92

If you're looking for 600+ after the summer it's time to upgrade to a T4 exhaust housing.

TurboLSVtecTeg

Or an SC63

Rod Short

The A/R ratio is the cross sectional area (A) of the scroll of the housing divided by the radius of that housing at the same point. In general terms, a lower A/R means that the turbo will have better low speed response but will be less likely to hold power at higher rpm's. A higher A/R ratio means that the turbo will not respond as well at low rpm's but will make more power at higher rpm's.

We're revamping our web site and will try to have a photo of a housing that's been cut in half so we can illustrate this better.

To get 600whp, you'll need approx 750 at the crank worse case scenario. There are a number of T4's out there from different manufacturers that can do this. Our best suggestion would be a PT67 in either a P or GTQ trim. A GT4067 would be an even better choice. There are a number of A/R sizes to choose from with a T4. We'd need to know a bit more about your combo and what you want to do with the car to give you a more solid recommendation.

Rod Short
Sales Manager
Precision Turbo

Nextelbuddy

which sc61 is better?
Brand new SC61 t3/t4 with To4E housing


- One Standard T350 exhaust housing with .52 trim exhaust wheel

OR

- One Standard T350 exhaust housing with .69 trim exhaust wheel

Nextelbuddy

how does this turbo :
Turbonetics
60-1 Stage 5 turbo A/R .70 83 trim
Brand new never installed

compare to a SC61???

Rod Short

Can't really say which is better. It all depends on your hp goals. Also, we really don't make a SC61 with a 52 trim wheel. We make 3 different versions of this based upon the displacement of the engine as follows:

2.0L and under SC6152E w/ T350 76 trim - 630 peak hp
2.0 to 3.0L SC6169E w/ T04 69 trim - 650 peak hp
3.0L and up SC6176E w/ T04 76 trim - 680 peak hp

This is assuming that you're not using nitrous. All three of these are using the GT35R compressor wheel. If you look at the compressor map, it offers 79% efficiency at 18 psi and 72% efficiency at 23.5 psi.

These ratings are also based on the T04E compressor cover with the 3" inlet and 2" outlet. The larger T04S cover (4" inlet / 2.5" outlet) would be worth another 10-15 hp with this turbo.

As far as which turbo is better, the SC61 or Turbonetics 60-1, that's really not fair for me to answer since I'm the sales manager for one of the companies. I suggest you let other people who have experience with these share their experiences.

Hope this helps.

Rod Short
Sales Manager
Precision Turbo

calib17a

How would the GT35R compare to the SC61 in relation to spool time and hp output in a 2 lit vtec motor since the SC61 uses the same compressor wheel? The one with the .82 A/R T3 turbine housing.

Rod Short

We're not an install shop, so I don't have any actual numbers I can share with you. The out-of-the-box Garrett GT35R comes with either a 0.82 or 1.06 A/R T3 style housing with a 4-bolt discharge side. We're using our own proprietary T3 housing with a smaller .63 A/R, which is more appropriate for the displacement that you have with your engine. I expect that the .63 would spool about the same as the SC61 (if not quicker because it has a GT wheel) while the .82 would not just because of the larger A/R. Hope this helps.

Rod Short
Sales Manager
Precision Turbo

TurboBumblBee

Rod Short
So if i have a presicion turbo can you tell me the specs on it a little bit, like when it should reach full boost and everything else, i cant seem to find a "model" number for it.. its says a/r .60 on the intake side, and a/r .48 on the downpipe side.. thanks alot

Rod Short

Well, the .48 is the A/R on the turbine side and the .60 on the compressor side tells me you probably have a T04E cover with a 3" inlet and 2" outlet. It's obviously a small T3/T4, but I'd really need to get the turbo in here in order to give you a worthwhile answer.

Rod

FwdCivicHatch

What A/R's do you recommend for a 1.8 B18C1 ~300-350hp at the wheels

With a 9.0:1 C/R

FOrSfEd

I'm running a sc61 60-1 trim, .63 ar with a stage 5 wheel or as Rod put it 3.0L and up SC6176E w/ T04 76 trim - 680 peak hp. I love this turbo. Right now I have no numbers but I'm only running 6 psi on a stock type r and the power feels great. I'll let you know what kinda numbers I'll be putting down once I get it tuned on 10. But I would def recommend this turbo.