Tomei M8270 Installation Complete with Dyno Sheets

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Well guys after a lack of information on these new turbos(other than what Tomei has provided) I bit the bullet and bought one of their kits. Although their information was provided was promising, supplying dyno sheets on a stroker motor gave people alot of false hopes.

The kit straight out of the box along with instructions was fairly simple to follow with the pictures, was in Japanese text. Installation was extremely straight forward with the only modification I had to do was to the factory engine bracket as the compressor housing was hitting it. Here are some pics of the installation along with dyno sheets and a video

Before
http://a5.sphotos.ak.fbcdn.net/hphotos-ak-ash4/216610_10150251742131966_577026965_7559097_6536641 _n.jpg

Turbo pulled out
http://a8.sphotos.ak.fbcdn.net/hphotos-ak-snc6/205918_10150251742281966_577026965_7559101_6705259 _n.jpg

Stocker that was blowing oil, good riddance.
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/198700_10150251742186966_577026965_7559098_7558350 _n.jpg

New Tomei M8270 Turbo Kit!! I purchased an ISIS Turbo manifold but decided to run the stock as I liked its' design much better.
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-ash4/251453_10150251742376966_577026965_7559102_5178079 _n.jpg

This is the part you have to trim so your compressor cover clears everything. If you completely removed the shield from the mount it would clear 100%. As for the bracket there are creases along the red line I put on there. Just follow those and you will be alright. Don't mind the mess, recently replaced the hi pressure line and P/S fluid has left a mess under there :(
http://www.mvpmotorsports.com/merchant/untitled.JPG


After this I had been on it 2 nights in a row and was just ready to get it completed so the photo session stopped.

About 3 weeks ago our tuner was kind enough to come in and give me a hand one Saturday. We installed a JGY Fuel Rail, Precision 780cc Injectors, Resisistor Box, Aeromotive FPR and my AEM EMS V1. Setup as follows:

425rwhp at 23 PSI in 115 degree shop temp and 135 degree intake temps/C16
394rwhp at 17 psi same conditions as above/Pump Gas

Barely any timing thrown at it(8 degrees at the highest point) and 11.8 AFR at full boost on C16, 11.1 on 93/low boost.

S13 Blacktop SR20DET
CP 20 over 9:1 Pistons
Carrillo H-Beam Rods
ARP Everything
ACL Race Series Bearings
Cometic 1.1mm HG
HKS Step 2 264's
HKS Head Package
ISIS Intake Manifold
Precision 780cc Injectors with JGY Rail
AEM EMS V1
Tomei M8270 Turbo Kit with stock turbo manifold
All the bolt ons that every SR owner has(rad, intercooler, turbo back exhaust etc etc)

RunFile 019 was the day we were tuning and I was actually hitting 23psi.
RunFile 027 that actually created more mid range power, was 93 degrees vs 115 but only hitting 20psi then started falling(pos profec). After about 4 hrs at a 1/8 mile track and a 45 min drive home to just get thrown on the dyno I was very happy with the the power output.

http://www.mvpmotorsports.com/merchant/Picture.jpg

Picture of my S14 as she sits now with the new found power :D
http://img.photobucket.com/albums/v323/r0b3rt/Untitled-7.png

Video of the dyno run,
S14 Sr20 Dyno at MVP Motorsports - YouTube (http://www.youtube.com/watch?v=rIsJv47_-Cc)

Overall I'm extremely happy with the kit and the power it produced. I will get the boost issue fixed, turn up the rev limiter in the AEM and hopefully net more power in this much cooler weather. Also will be installing an AEM Meth kit come winter time so I no longer have to run C16 to run high boost.Hope you enjoyed the read!

Regards,
Robert

[HPKMotorsports3]

is your old turbo a t28? if so are you selling it?

[[email protected]]

It was the stock T25.

Regards,
Robert

[HPKMotorsports3]

ok thanks... nice numbers

[va240dude]

^^^ Thanks a lot for the review. The reviews thus far have criticized the turbo lag more than the actual hp produced number. While Tomei claims they have built this turbo lineup for response, even on the website they are saying 4k rpm it hits full boost (not terrible looking at the competition turbos). Other reviews I've read have been hitting it at 4400 or later. Just curious about your own experience on street and or track with this turbo setup and when you're hitting full boost, and what you personally thing about the lag coming from a T25 or T28.

[[email protected]]

Please note that I purchased the larger of the two turbos, this one was advertised for maximum power. Coming from the stock T25 the lag is very obvious BUT when I swapped to the Freddy IM on the stock turbo spool was so delayed it was ridiculous. When comparing stock turbo/Freddy IM vs Tomei Turbo/Freddy IM it's honestly not that bad. If I were to go with the stock IM and a set of less aggressive Tomei Pon Cams I'm sure it would yield a much more desirable mid range.

Full Boost is at right around 4400-4500 or so to hit 23psi.

Regards,
Robert

[7jpat]

thanks for the post i want to hear from someone before i got one i want the same one

[[email protected]]

Not a problem, happy to do it!

Regards,
Robert

[GroundPerformance]

Definitely a nice turbo. Performance is about the same as my previous FP TD06SL2-20G.

[[email protected]]

For someone who is looking for a bit more midrange I think a set of Pon Cams vs my Step 2 HKS 264's would be a far wiser choice.

Regards,
Robert

[va240dude]

Please note that I purchased the larger of the two turbos, this one was advertised for maximum power. Coming from the stock T25 the lag is very obvious BUT when I swapped to the Freddy IM on the stock turbo spool was so delayed it was ridiculous. When comparing stock turbo/Freddy IM vs Tomei Turbo/Freddy IM it's honestly not that bad. If I were to go with the stock IM and a set of less aggressive Tomei Pon Cams I'm sure it would yield a much more desirable mid range.

Full Boost is at right around 4400-4500 or so to hit 23psi.

Regards,
Robert

Yeah I am looking at the smaller M7960 kit, which SHOULD yield a better response and looks nice, just not a whole lot of info on them yet.

[[email protected]]

Our good friends over at Touge Factory have done an install on the 7960 per some convos we have had. I shot him a link to this thread and hopefully they chime in.

Regards,
Robert

[tougefactory]

Hey Robert!

Good numbers! similar to what Tomei had with their 2.2L Stroker kit engine.

We did install couple M7960 kits on local customer's cars.
Installation wise - it is very straight forward. No cutting or trimming necessary. Compressor is slightly larger then the GT2871R.

We installed the M7960 in a S14 Zenki with S14 SR20DET.
Setup was:
M7960 Tomei turbo kit
Aftermarket exhaust manifold (not sure of brand)
3" turbo back exhaust
Greddy FMIC
Tomei 256 Poncams
Freddy intake manifold
Sard 850cc injectors
Enthalpy Rom Tune

Car felt similar to a GT2871R with HKS 264 Step 2 cams.
Car hit full boost right around 3800-4000 rpms with the Poncams. Spools similar to the GT2871R, and the way the power comes on feels very similar.
We don't have any dyno sheets to show.....sorry.

As for comparison, I would say this is a great alternative to a GT2871R turbo. Cheaper, and more complete.
Compared to a S15 Spec-R turbo, this is about 1000 RPM laggier. Not as repsonsive, but there is a lot more top end.
Good response with good top end. This would be ideal for Drift or small circuit tracks.
The wastegate is made for minimum of 15 psi....

[[email protected]]

Thank you for chiming in!!

Regards,
Robert

[zurud]

What's your et and trap speed at 1/8 track?

[riptor]

im also lookin at the 7960 kit as well. i was wondering, i have stock bottom end with pretty similar top end. 256 greddy cams and 555 nismos with a freddy. do you guys think i should increase to 750's for this turbo setup. im running 10psi now.

[[email protected]]

My injectors are at 80% duty cycle on 23 psi for comparison. Really just depends what amount of boost you plan to run.

zurud:
I need drag radials very badly. Went on the wheels you see in the pic, 275/35/18 Dunlops. Not sure on the series but I have done atleast 80 passes on them with multiple burnouts and have seen little to no wear. Fastest ET to date is a 8.71 with a 2.2 60 ft and fastest ET was 94 MPH.

Regards,
Robert

[riptor]

ok...i had a buddy of mine help me with calculations and i looks like i will need to upgrade...also the wg that comes with the turbo. you said STARTS at 15psi? or is that just what yours was tuned to?

[[email protected]]

The actuator that is included with the turbo is a 1 bar actuator. That will be your base boost pressure.

Regards,
Robert

[riptor]

ok thanx rob! im lookin at the 7960 kit myself honestly. also as far as the ems goes do you know the difference between the seres 1 and series 2. i fried my pfc and i need a replacment. i have heard good and bad. i was just wondering how like it?

[[email protected]]

Shoot me over a PM with your email and I'll shoot you over some info ;).

Regards,
Robert

[SoBay240guy]

if by cheaper you mean more expensive...

I only found ebay deals cheaper than average GT2871r's no legit sellers...

Looks decent overall, great for JDM guys on a budget, but it isn't "cheaper"

[codyace]

Seems pretty laggy IMO, and unsure why race gas was even used for the pull. I also really hate when shops/tuners don't keep the sam scaleing on both side of the dyno pull.

Either way, no reason to even run race gas...those numbers are only marginally more than what I make with a 2871r at 20 psi on pump gas, with a rom tune, with 8.5 compression. I'd go back to your tuner, dump some timing into it, and run pump gas.

Edit: Ditch that internal gate as well, you'll really see some better response and true boost readings going external gate :D PM if you're interested.

[Howie Felter Snatch]

Please note that I purchased the larger of the two turbos, this one was advertised for maximum power. Coming from the stock T25 the lag is very obvious BUT when I swapped to the Freddy IM on the stock turbo spool was so delayed it was ridiculous. When comparing stock turbo/Freddy IM vs Tomei Turbo/Freddy IM it's honestly not that bad. If I were to go with the stock IM and a set of less aggressive Tomei Pon Cams I'm sure it would yield a much more desirable mid range.

Full Boost is at right around 4400-4500 or so to hit 23psi.

Regards,
Robert

Awesome info!! Can you please elaborate what you mean by "Coming from the stock T25 the lag is very obvious BUT when I swapped to the Freddy IM on the stock turbo spool was so delayed it was ridiculous."

Are you saying that the Stock T25 and a Freddy IM, yielded a lot more turbo lag than a Stock T25 with the Stock IM? This confuses me a little because I'd thought you would get a better spool (i.e. less lag) with a better designed/flowing IM.. (e.g. Greddy IM or knock off IM's [Freddy])

[S13 curtis]

23psi & C16??? Turn up the boost man!

Nice numbers BTW, Im sure you could get it close to 500whp because this set up is no where near maxxed out. Get some bigger cams and and MV-R Gate set up 30+psi and you'll be there... and injectors

[[email protected]]

Howie Felter Snatch:

The stock T25 with the long runner stock intake mani was pretty much instaspool with the built motor. Power was felt almost the instant I hit the throttle. Once I installed the Freddy manifold on the same setup power was delayed by a noticeable amount. I have been told that it's supposed to increase your peak power but I never threw it on the dyno to confirm.

The reason I ran race gas is simply because by the time we were ready for high boost tuning we were dead empty on fuel. 50 gallon drum of C16 in the oil room so figured better safe than sorry. 23 PSI is where Tomei told me they made the 450hp on the engine dyno so wanted to be as similar as possible for the best comparative data. Not everyone is baller enough to run a Genesis stroker motor like they tested with, I sure as hell am not! My setup is for sure within pretty much everyone's budget and can actually be had cheaper(Eagle Rods instead of Carrillo, BC head setup instead of HKS, ROM tune instead of AEM etc).

Regards,
Robert

[S13 curtis]

Howie Felter Snatch:

The stock T25 with the long runner stock intake mani was pretty much instaspool with the built motor. Power was felt almost the instant I hit the throttle. Once I installed the Freddy manifold on the same setup power was delayed by a noticeable amount. I have been told that it's supposed to increase your peak power but I never threw it on the dyno to confirm.

The reason I ran race gas is simply because by the time we were ready for high boost tuning we were dead empty on fuel. 50 gallon drum of C16 in the oil room so figured better safe than sorry. 23 PSI is where Tomei told me they made the 450hp on the engine dyno so wanted to be as similar as possible for the best comparative data. Not everyone is baller enough to run a Genesis stroker motor like they tested with, I sure as hell am not! My setup is for sure within pretty much everyone's budget and can actually be had cheaper(Eagle Rods instead of Carrillo, BC head setup instead of HKS, ROM tune instead of AEM etc).

Regards,
Robert

You did a good job with the mods :whip:. What are the specs on the compressor wheel?

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Some pics from Tomei's site:

http://www.tomei-p.co.jp/_2003web-catalogue/000_arms/image/sr_m8270/m8270_spec_e.jpg

http://www.tomei-p.co.jp/_2003web-catalogue/000_arms/image/sr_m8270/hikaku_a.jpg

http://www.tomei-p.co.jp/_2003web-catalogue/000_arms/image/sr_m8270/hikaku_b.jpg


Regards,
Robert

[Corbic]

I don't get it, all that money, upgrades and effort and turbo is not breaking 300hp... and people are impressed?

[[email protected]]

It made 426??

Regards,
Robert

[Corbic]

It made 426??

Regards,
Robert

Graph in the fist post said 284. 426 is outstanding.

Edit: *rereads* Sigh, fuck tapatalk, my bad.

[[email protected]]

LMAO, I put the cursor there when I laid the 2 graphs on top of each other. Wanted to see what the mid range gain was with the temp drop.

Robert

[[email protected]]

Little bit of an update for you guys. Cars is getting dropped off at the body shop to get the front bumper/lip fixed (hit a 18 wheeler tire tread at 70ish mph :( ). Once it gets back I'm going to take some advice from CodyAce/many others and give it some timing, also going to try and source another cast manifold to get honed/swain coated. On top of that I will be adding an AEM Meth Injection Kit with failsafe device to complete my power mods.

Regards,
Robert

[Mikester]

The actuator that is included with the turbo is a 1 bar actuator. That will be your base boost pressure.

Regards,
Robert


Resurrecting old thread.

I found that base boost pressure is closer to 1.2- Which is fine w/me :D

Anyway- Robert, those are great numbers! As our setups are extremely similar, I'll drop you a line when I have a sheet to post. Should be in the next little bit as my Z32 tranny swap is almost prepped for installation. It will be interesting to compare 23-24psi (1.6bar) runs w/you. As you mentioned the subtle differences, I have 260* Procams, solid lifters w/BC springs... Along with the same 9.0:1 pistons w/Eagle rods & OEM bearings. On the break-in tune, I noticed the lag in generating boost pressure- but worthy of undivided attention up top- super fun; and can't wait for the final tune~

Codyace- you were quite the negative Nancy in '11 hahahaha ;)

Thanks again for posting this way back when~

Mike

[[email protected]]

Mine fluctuated a bit more as well that was just the base pressure as told by Tomei.

Look forward to see what you put down! At the power level the car was at with stock SR Trans and Stock VLSD Diff it made acceleration ridiculous but my top speed was roughly 143 if I recall and it was still trying to pull. That was running 5th gear to 7k.

Regards,
Robert

[Mikester]

Did you ever get a trap speed in the 1/4mi? On my ONE successful run, I trapped 110.7 @ 1.25 bars. Excited to do it at full boost!

[[email protected]]

Unfortunately not, nearest one was well over 1.5 hours away from me at that time.

Regards,
Robert

[Mikester]

Well, if our numbers are close enough on the dyno, I'd say that whatever I trap will be pretty close to ya~

[[email protected]]

I trapped mid 90's in the 1/8 spinning completely through 3rd gear on street tires. Never ran on the drag radials but was able to dead hook on good streets at 20-25 mph completely cold. With street tires and brake boosting the tires would break loose up to about 55-60mph. Street tires are garbage at that power level on a car this light.

Regards,
Robert

[Mikester]

Sweet! At 1.25, I only made mid80's