these are the scientific pics i took today of the differences between the pt67 and the pt/sc 61. both are straight t4's w/ vbands on the exhaust housings. both cold sides are .70ar and hots are .68ar.

the67 clearly does not DWARF the 61 in any means as far as housings are concerned (same housings DUH!!!), the inducer and exducer however is the difference--67-->not for fun on streets. the only visual diffs are the inducer size as well as the exducer. the blades are fatter on the 67. the inducer on the 67 has 6blades, the 61 has 6blades as well. the 67 exhaust has 10fins the 61 has 11fins. the inlet on the 67 is slightly bigger aswell. overall, if i was going to buy another turbo, the 61 would be my choice. for overall power and driveability. get one, or two

*the 67 is the new gtp/gtq wheel, the 61 has the gt30 wheel.
**the 67 is on the left of most pics
***both turbos have had the special touch process added to them by Art, Arturbo







61inlet

67inlet

67inducer

61inducer



Modified by rOby at 9:25 PM 9/10/2003


Modified by rOby at 9:26 PM 9/10/2003


Modified by rOby at 9:27 PM 9/10/2003

 

 

I dunno. 6mm on the inducer makes a huge difference in flow #'s. A PT67 can support more then 100 extra whp over the 61. Personally I feel that the 67 is too big for any car that will be run on the streets. Its perfect for a dedicated Sport FWD competitor though The 61 can make more power then any street car could ever use and it will do it w/ quicker spool and more midrange. so in conclusion i agree. id go w/ sc61.

 

yep, thats what i meant to say. i thought i did say id pick the 61 over the 67? just thought id do some scientific testing w/ my toothbrus micrometer.

 

If I am making 570hp with a 60-1 but i want about 650-700hp what turbo do you guys think I should get? SC61 or the SC67? Will the SC61 support 650hp with low shaft speeds?
Is there a compressor map out there for these turbos?

This will be for FWD sport/pro-am classes.
I need to catch that Bad *** Jason Hunt guy

 

Thanks for the scientific study. How come you always have all these turbos?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by uglyasscivic &raquo;</TD></TR><TR><TD CLASS="quote">If I am making 570hp with a 60-1 but i want about 650-700hp what turbo do you guys think I should get? SC61 or the SC67? Will the SC61 support 650hp with low shaft speeds?
Is there a compressor map out there for these turbos?</TD></TR></TABLE>

The 61 might support 650whp w/ the right T4 back side but it would take alot of boost. Its rated @ 65lb/min flow. There used to be a compressor map @ precisionte.com but I havn't scoured the new site for it yet. For power like 650-700 the 67 should be used.

 

do you brush your teeth and the turbos with that toothbrush?

 

yes

 

man chris your getting pretty knowledgable about precision now

 

Nice toothbrush!

Andre

 

u couldnt find a ******* ruler, and used your beat up toothbrush??

 

its not beat up, its still under warranty.

 

damn those are nice!

good ol bathroom pics - i hope you weren't doin buisness while taking those pics

 

OK Im going to buy a precision Soon im looking at all the turbos they carry. I presently run a T-70 and im making 535whp at 30 psi, I think the turbo is very inefficient past 550whp, I mean I know it will do more but I will have to run way too much boost. Can anyone recommend a Precision set up for 650whp at 30psi. I could use NAWS to help spool.... Any suggestions from you Turbo Gurus out there.

 

the pt67 with the gtq wheel is what i will be going with this winter. capable of supporting 780 horsepower. a little shot of juice out of the hole and she'll spool quick.

 

I would like to get a turbo that will make 650hp without pushing the turbo or getting aggressive with the tune. The ONLY reason I am making 575hp now is because I got really aggressive, I would really like to make alot of power without getting in the High 12 AF range. I think a turbo that I am not pushing to its limits will help alot.
Right now I am getting 27psi at 6500rpm so spool time is not an issue. It lookes like the 67mm with the GTQ back side is the way to go

 

beauty!
howmuch does the pt61 flow????(and which gt30r wheel does it have)

 

i actually have to disagree with you guys... have either of you felt the turbos, or are you speculating from general size differences?

also anyone considering the new turbos coming out the GT P trims are badass

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FFgeoff &raquo;</TD></TR><TR><TD CLASS="quote">i actually have to disagree with you guys... have either of you felt the turbos, or are you speculating from general size differences?</TD></TR></TABLE>
Any secrets that you know of ?

 

No secret, its just that if you are concerned about spool, we put a t3 side on the 67mm wheel and she wakes up verrry nicely.

If you want power we can put a t4 side on it and you have more top end than you ever could plan on.

I prefer the 67 to the 61 and i have both turbos.

edit: this is a t3t4 67mm on a stock gsr, i do not consider 200 whp at 4700 bad




also here is an sc61, it hits 200 hp about 200 rpm earlier if i can see correctly...



Modified by FFgeoff at 11:57 PM 9/10/2003

 

geoff, you speak of the t3 bacside tho , naturally it will be a tad different w/ the t4 side. to drive on the streat and for more room like you noted in your manifold post a t3 back would be ideal.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FFgeoff &raquo;</TD></TR><TR><TD CLASS="quote">i actually have to disagree with you guys... have either of you felt the turbos, or are you speculating from general size differences?

also anyone considering the new turbos coming out the GT P trims are badass</TD></TR></TABLE>

This is how i feel about it. Ive ridden in an SC61 car w/ t3 .63 stage V and the powerband was great. Also been around Allen's car(hondahvn) since the day he built it. Seen it run, raced against it, etc. on just 20psi the car obliterates the bfg drag radials in any gear on any roll. It hits 8psi @ just over 4000 rpm's and a full 25psi @ about 5500 rpm. In CornbreadJr.'s 428whp/306tq GSR sc61 he raced, w/ me riding shotgun/filming, a full bolt on/chip 03 cobra. Then a week later a heads/cam Trans Am. We were playing catch up by two/three cars on the rolls. I don't know about you but when I race I prefer to get out in front and stay there. I can't imagine wanting a bigger compressor side then that. I know boostfed hasn't finished tuning his car yet but he is running a 84mm b16a and the 67mm w/ P trim. They plotted boost on the dyno and the car barely made 5psi by 5500. It made a full 25psi @ 7000. Don't ask me why but i feel like that is WAY too much lag for any street car(unless its going to be raced on slicks w/ 2step and the goals are low 10's/high 9's). Now granted on a 2.0L it would spool faster, maybe by 6500. I don't see the point of matching such a big compressor wheel w/ a stage V .63 when a smaller compressor wheel can make more then enough power. Maybe when the GT P trim comes out i will change my mind.

 

I recently purchased the pt67 a couple of days ago and I can't wait until my stroker kit and turbo get here so I can finally start putting the motor back together after 4 months of having it apart. The 67 will give you a nice kick in the *** with a 50-75shot of nitrous. Its the kinda *** kicking that feels GoooOOOoooD!

 

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

edit: this is a t3t4 67mm on a stock gsr, i do not consider 200 whp at 4700 bad


</TD></TR></TABLE>

thats pretty good. On 9psi Allen did 231 tq. and 372whp w/ the 61mm. I guess either compressor could work as long as u do the stage V .63 exhaust and there are no issues w/ surge.


Modified by DIRep972 at 6:24 PM 9/10/2003