Jump to content
SAU Community

Recommended Posts

I'd imagine for flow rates towards the upper end of the 8374 the 9174 will have a lower exhaust manifold pressure as the compressor will be more efficient, all other things equal.

at 75lb/min @ 2 bar you're at 65% on the 83mm but still up over 72% on the 91mm that effeciency change correlates to shaft power requirement dropping, so the required turbine pressure ratio also drops.

 

the changeover in efficiency occurs at about 58lb/min. less than that the 8374 will be lower pressure, and more than that the 9174 will be lower. during acceleration transients however the 9174 will be slightly higher due to the increase in inertia of the larger comp wheel.

 

17 hours ago, Full-Race Geoff said:

that is correct, 9174 works best with the big 1.45 a/r housing when pushing the turbos limit.  The 74mm turbine is relatively small to swing the 91mm compressor so anything that can be done to reduce preturbine drive pressure at high rpm / high boost is a win for this one. 

if only Borg warner made an EFR 67/84mm compressor wheel!

maybe even anodize it black?

Edited by burn4005
56 minutes ago, RICE RACING said:

9174 on a well built 2.7lt 4 cyl

 

That's just bollux.  What a ridiculous power delivery haha.

For those who didn't watch the video - check out this power delivery, 300kw at 4000rpm on something holding power to 8500rpm... Like 875hp power.  There isn't much to question there.

 

Cheers for sharing!

 

Screenshot_20180712-221707_YouTube.jpg

6 minutes ago, Lithium said:

That's just bollux.  What a ridiculous power delivery haha.

For those who didn't watch the video - check out this power delivery, 300kw at 4000rpm on something holding power to 8500rpm... Like 875hp power.  There isn't much to question there.

 

Cheers for sharing!

 

Screenshot_20180712-221707_YouTube.jpg

That's with a 1.00TCF too, so basically ~1000bhp @ engine with the FR combination in that car with the rear end and 1:1 4th (minimal gear train *gearbox* losses no driver/driven x driven/driver power flow since direct drive *no lay shaft* so input shaft>output shaft).

Now to pick what to use on the EVO????

Edited by RICE RACING

we built the turbo kit on steph's drift car.  its a 2.6L engine from a toyota sienna minivan, typically he revs to 7800-8000rpm depending on the track and gearing.  Turbo setup is divided t4 manifold, very similar to evo but flipped so its a top mount obviously.  the turbo started as 8374 0.92 a/r, then tested 1.05 a/r 8374 and went back to 0.92 once they had the nitrous on the car.  He is battling V8s and 2jz's so he needs as much bottom end torque as is possible.  once they switched to the 9174 he kept the 0.92 a/r for a while due to the setup already being built and in place.  as of right now i believe he is back on the 1.05 a/r. 

keep in mind there is a lot of nitrous on this engine

Edited by Full-Race Geoff
21 hours ago, Piggaz said:

What kind of exhaust pressure increase are you seeing on the 9174 over the 8374 for a given turbine housing size/engine combo?

it depends entirely on the application - altitude, engine size, max rpm, boost level, VE, etc.  typically the 9174 exhibits increased emap at most points

13 hours ago, RICE RACING said:

That's with a 1.00TCF too, so basically ~1000bhp @ engine

Yeah, definitely noticed that - ANNNNND in the most "harsh" correction mode Dynapack dynos offer.   No two ways about it, this is making some big power with a very wide delivery.

38 minutes ago, Lithium said:

Yeah, definitely noticed that - ANNNNND in the most "harsh" correction mode Dynapack dynos offer.   No two ways about it, this is making some big power with a very wide delivery.

Yep good to know a 9174 with 1.45 will actually do 1000bhp on a 2.7lt engine. It's not often you find nuggets of info like that around, saves having to test everything yourself for sure!

Somebody help me out, being offered a seemingly near new 7670 with a 1.05 TS rear on it. this would be to go on my forged SR with a sexy head and good TS manifold. 

Too big/small max power? I have a hard time wraping my head around EFRs other than they seem to be a "good" thing. 

Sprint/time attack style car so the transient is what interests me, I'm expected the motor to be capable of "decent" revs. 

The 7670 is the turbo I used to have,
Up to 450kw, maybe even 465kw.

It's a big turbo. It's not as big a turbo if you're realistically considering using it as a track car, i.e always up in that rev range. You'd have to define "sexy head" as this is a turbo you'd be need to be living at 5-8k at constantly.

It is GTX3576 sized.

26 minutes ago, ActionDan said:

Somebody help me out, being offered a seemingly near new 7670 with a 1.05 TS rear on it. this would be to go on my forged SR with a sexy head and good TS manifold. 

Too big/small max power? I have a hard time wraping my head around EFRs other than they seem to be a "good" thing. 

Sprint/time attack style car so the transient is what interests me, I'm expected the motor to be capable of "decent" revs. 

I guess I don't know what turbos you are familiar with, but I feel like the most sensible way of describing one is if you were looking at something using "back in the day" turbo terms - its in the area of a Trust/Kinugawa T67 - Garrett GT3582R power wise but wanted better response (just to clarify, I'm not saying it will be like a supercharger - just something that is in that power range with less lag) then you should be happy with it.

Edited by Lithium
8 minutes ago, ActionDan said:

Maybe too big for me then I was looking at Gen2 GTX3076 or so. 

Maybe it was the 7163 I was looking at. 
 

 

Haven't seen much of the Gen2 GTX3076Rs, but I'd take an EFR7670 over a Gen1 GTX3076R from what I've seen.  

An EFR7163 would be a beast on an SR, though if you are going for high rpm there is a chance of choking it - I'd use the biggest housing you can get on that turbo.

7 minutes ago, ActionDan said:

Maybe too big for me then I was looking at Gen2 GTX3076 or so. 

Maybe it was the 7163 I was looking at. 
 

 

I would highly recommend AGAINST the 7163 for your track use. IMHO the rear exits are too small for TS use. I would think a 7670 and 1.05 (MAYBE even the smaller 0.92) would be perfect. The 7163 only come in 0.80 rear in TS form which I believe (no expert) chokes too much, especially under higher RPM.

FYI I'm running an EFR7163 on T4 TS SR20DET. I will be pushing it HARD to get maximum response and power for street / light track duties. But the small lag hit I think you'd be wanting the extra ~80-100rwkw and freer flowing turbo setup.

I don't wanna blow the bottom end apart trying to "use" a turbo properly. 

Will have CP pistons, Manly rods, and some other tricks, but I was under the impression most "basic" forged h beams were only good for 600-650 crank hp in an SR, but how long is a piece of string? 

 

 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
    • OK, so a bunch of trim needs to come off to get to the rear shock top mounts. Once the seat is out of the way, the plastic trim needs to come off. Remove 2 clips at the top then slide the trim towards the centre of the car to clear the lower clip Next you need to be able to lift the parcel shelf, which means you need to remove the mid dark trim around the door, and then the upper light trim above the parcel shelf. The mid trim has a clip in the middle to remove first, then lift the lowest trim off the top of the mid trim (unclips). At the top there is a hidden clip on the inner side to release first by pulling inwards, then the main clip releases by pulling the top towards the front of the car. The door seal comes off with the trim, just put them aside. The the lighter upper trim, this is easy to break to top clips so take it carefully. There is a hidden clip towards the bottom and another in the middle to release first by pulling inwards. Once they are out, there are 3 clips along the rear windscreen side of the panel that are hard to get under. This is what the rear of the panel looks like to assist:
×
×
  • Create New...