[Closed] Borg Warner Efr Series Turbos

[Dose Pipe Sutututu]

we should all bring out our cars to a roll racing night

[HarrisRacing]

Yeah man run that -5 on the track and get us some 1/4 mile results with logs. It's an exceptionally hot and humid summer here this year but when it cools I'll run the car some more.

[mr skidz]

Roll Racing sounds like something that doesn't require a steering wheel [emoji14]

[Lithium]

@HarrisRacing - What exhaust manifold are you running, and what ID runners does it have?  

Skidz - anything involving corners throws HEAPS of variables into the game which make it next to impossible to compare turbo performance

[HarrisRacing]

Some of my videos if you guys haven't seen them.

[HarrisRacing]

13 minutes ago, Lithium said:

@HarrisRacing - What exhaust manifold are you running, and what ID runners does it have?  

Skidz - anything involving corners throws HEAPS of variables into the game which make it next to impossible to compare turbo performance

6boost IWG divided T4 for EFR. no clue on diameters but I'm sure I could ask Kyle.

[HarrisRacing]

Also my tach isn't reading correctly. It needs to be adjusted. My redline is solid 8k rpm but tach reads about 8700

[Dose Pipe Sutututu]

24 minutes ago, mr skidz said:

Roll Racing sounds like something that doesn't require a steering wheel

Come next track day at Wakefield that trak-life & Yez Racing organise.. the September one is full unfortunately. $235 per car, untimed, unlimited track no sessions.

[mr skidz]

@HarrisRacing - What exhaust manifold are you running, and what ID runners does it have?  

Skidz - anything involving corners throws HEAPS of variables into the game which make it next to impossible to compare turbo performance

I thought it was an invite to go have some fun not compare turbo's [emoji54]

[Lithium]

Guess I have a bad habit of looking at things in the context of the thread topic....

[mr skidz]

Come next track day at Wakefield that trak-life & Yez Racing organise.. the September one is full unfortunately. $235 per car, untimed, unlimited track no sessions.

Will do definitely at some stage last time I went to Wakefield in my last Gtr I ended up spending the whole day in rear wheel drive ripping skids with the gtst boys got some footage of it somewhere.

But I think my first track day in this car will be at the creek as I know the creek really well from many bike sessions I've done over the years I've only been to Wakefield once so I'd be useless there and besides my car still uses completely stock brakes they're not the greatest I think we all know that but for the most part it's just my streetcar / daily nothing serious just a fun car.

[mr skidz]

Guess I have a bad habit of looking at things in the context of the thread topic....

How dare you [emoji110][emoji34][emoji23]?

[HarrisRacing]

damnit  just went to get you guys some logs + videos and popped the axle out hammering around the first turn. Gets violent with the 3 wheel drive. need to change the circlip on the axle.

[reaper]

3 hours ago, Dose Pipe Sutututu said:

There are people with results however they can't be bothered sharing. One of those people just pulled off their setup to go bigger lol

Hey not my fault I pulled it apart before everyone asked for stats!

I just wanna go fast

[mr skidz]

20psi 2 step.
bad footage but all the sounds are there [emoji41]

[HarrisRacing]

^^ Looks pretty quick!

Took the liberty of converting my dyno data from 10 psi and 17 psi and putting in excel graphs. BLUE lines are data associated with 17 psi pull, RED lines are data associated with 11 psi pull. Boost is in PSI, but is multiplied by 10 for scaling purposes (so 100=10.0 psi and 200=20.0 psi).

Also I believe the turbo would have made 380-385 whp if revved to 8k rpms on the 11 psi pull...I was hesitant at first because this was literally the first dyno pull. It did make 371 whp at 7600 rpms though.

[mr skidz]

I'll get another dyno run done on this pump tune of mine out of curiosity , as my first dyno tune was over 1000rpm laggier than my current tune at 18psi when set to 25psi.
(Someone else tuned it as we needed load on the fresh engine)

Cool vids too I enjoyed watching them all
[emoji4][emoji108]

[Snara]

Hi

I have a question, what power can make 7670 1.05 on RB26 forged + cams + pb98? With no exceed 27psi?

Previously i wanna 8374 .92 but i look on HarrisRacing 2.75l RB and i think it be too laggy for stock capacity and daily drive. 7670 1.05 should spool 300-400 rpms faster? 

I just need 630 EU hp on crank

 

[HarrisRacing]

If going 7670 I would stick with a 2.6L and stock cams. Turbo will be at maximum speed for sure and you will need to add a road rage gauge to make sure you don't destroy it from overspinning. I wouldn't suggest running the boost over 20 psi over 7k rpms. I bet it will *just* make your HP number though. It would be a VERY fun daily driver.

Reason why I say stock cams is because you will start to choke that turbo on top end on the exhaust side and larger (ie-overlapping) cams will only make the backpressure contamination worse in the cylinder.

When I was comparing the 8374 to the 7670 I think I found that the 7670 should hit full boost 500 rpms sooner than the 8374 and make similar power up until around 7k where the 8374 will continue to feed the motor. Of course I was probably looking at 2.75L at the time so I'm sure a 7670 on stock cams and 2.6L is a good choice for a street car that occasionally wants to turn up the boost.

[minesskyline]

33 minutes ago, Snara said:

Hi

I have a question, what power can make 7670 1.05 on RB26 forged + cams + pb98? With no exceed 27psi?

Previously i wanna 8374 .92 but i look on HarrisRacing 2.75l RB and i think it be too laggy for stock capacity and daily drive. 7670 1.05 should spool 300-400 rpms faster? 

I just need 630 EU hp on crank

 

Someone might be able to correct me if my math is wrong, but @ 27psi, but that turbo is going to be out of the efficiency range for your setup.