2 more pounds of boost. I think it was a typo when he said 25 lbs. The graph shows 27lbs plus also I imagine they had better spark this time with the higher voltage.

Tuned a 13B the other day with a 6266 Ball bearing.
It was slower to spool then the EFR9180 i just finished tuning.
Anyone comparing the Precision to any of turbos in the EFR series is kidding themselves.
EFR has crazy spool properties neither Precision or Garrett have.

Can anyone here build 30psi at 5000rpm in 1st gear with any of there GT42 or 6766 Precision's on 93 octane? or even e85 for that matter.
I doubt it.

:icon_tup:

Common Elliot, finish the kit for the FC and ship it out :D, we anxiously waiting to start on the car!

I am looking forward to it!! Here is an old photo I sent Yves.. Its actually been 98 Percent complete for a long time. I need to hire more people around here...

All said and done how much hp did you guys get out this build?

Thanks

515rwhp was the max recorded. We have a ported motor going in now, and we will be testing all 3 turbochargers back to back( 7670/8374/9180 IWG). I have all the turbochargers here ready to go.

@515rwhp it also makes 450rwtq( similar to what cars making past 600rwhp make). Also since it comes on so early, it is much faster than what your standard 515rwhp feels like. Just watch the videos...

on the above setup what power/ torque/ response can be expected on 99 octane shell vpower fuel at 1bar /15psi? The reason for asking is im looking to buy this turbo ideally from yourselves but wont be running e85 or 26psi boost lol. :icon_tup:

One owner made 338rwhp on a dynodynamics( around 380rwhp dynojet) on pump gas and 12 psi. Another made 400rwhp at 10psi with a raceport. We have a lot of these kits out there so more results should be popping up.

On stock ports which turbo would be more responsive at 1bar/15psi boost? 7670 or 8374?

The 7670 will be faster.

Opinions on the 0.92 IWG housing again for a stock port oem engine?:)

The videos and high boost dyno sheets are all on stock ports.

the above dyno suggests the 8374 can make 15psi at 2800 rpm.....will it still spool that quickly on pump gas but the boost remaining at 15psi?

Also whats the highest boost you can run safely/ reliably on a bone stock motor with 99 octane pump gas with the 7670/8374?

One should still see 15 psi by 3000 even on pump gas. That car in the video makes 20psi by 3000 on e85. Keep in mind the porting combo, configuration etc has an impact on this. You cannot find a faster spooling turbo system on the planet, not a soul has been disappointed with one of our kits.

thanks. what's the safest boost/highest boost i can run on my stock ports engine? on pump gas...in the uk its 99 octane. mine's a weekend car so what would you recommend?

99/100 octane would be fine to 25psi range( just tune richer for higher boost).

Just to be clear, that is 99 octane, not RON? They're not the same.

We get 99 RON in the UK :icon_tup:

99 RON is equivalent to 93-94 AKI octane which is what we use in the States. LINK

Apologies as mentioned above its93-94 the same as you get in the states. Whats the max boost u would recommend on a stock port motor?

Not to interject what Turblown is telling you but you shouldn't calculate your max PSI based on your port size because frankly its somewhat irrelevant. The smaller your port, the more boost it will take to make the same power as a larger port but both ports will peak whenever your turbo runs out of air...this means you'll make the same peak power with both.

You should determine your max PSI, if running a REW, on your apex seals (always debatable) and the confidence of your tuner. Some people have run 30 psi on stock ports with AI and pump gas, and many have blown up at 15 psi. Find a good tuner and determine his confidence level.

for a purely street fd with stock port what is the better turbo overall 7670 or 8374 at 15psi on pump gas? also whats the highest boost that can be run on stockport engine with oem mazda apex seals?

Your question was answered in the post above yours.......

P.S no one will tell you what turbo is better as at the end of the day its up to you.

at sea level the EFR8374 turbo is tough to beat. I like the IWG version.

I would run this, even at altitude I like the EFR8374. the 7670 is also a great option if you do more autox, tight circuit stuff. the efr8374 is like the michael jordan of basketball. He has a good vert, he can dribble, can shoot, has hands the size of a gigantic person, and knows the game. the efr7670 is more like a point guard who isn't as tall but can do almost all the same stuff (isiah thomas?).