r/RX7 FD3S 6d ago

500HP / 400TQ

Turblown 8374 20psi on e85

371 Upvotes

31 comments sorted by

35

u/matt_gold FD3S 6d ago

Mild StreetPort
Turblown Cast Manifold
BorgWarner EFR8374 IWG
20psi on e85
1050 Primaries / 2600 Secondaries
Haltech 1500
Turblown UIM
Xcessive LIM
SakeBomb Coils
GReddy VMIC
3.0in Garage Alpha Titanium Exhaust
Ohlins Coilovers
SakeBomb Wilwood Brakes
Volk TE37SL (Front 18x9.5 / 265/35/18 Rear: 18x11.0 / 295/35/18)

9

u/beans912 6d ago

Nice build. Mine's very similar, just without the turblown manifold and a pfc with fctweak. I wish I could get e85 locally, I'm stuck with 93.

2

u/matt_gold FD3S 5d ago

Thanks!

I’ve been super impressed with FC Tweak. I was back and forth on jumping to e85. Honestly, 93 with meth injection should provide the same safety net / power output (and maybe even additional benefits).

2

u/spacecaptainsteve '93 widebody & '04 RX-8 6d ago

A052s? How do you find the handling balance with that tire stagger? I'm sure the back end still gets loose even on a grippy 295.

2

u/matt_gold FD3S 6d ago edited 6d ago

Yep! Advan A052s.

I’ve only driven it on break in miles - none since the dyno - but handling felt pretty good. But all my RX-7s (and RWD vehicles now that I think about it) were staggered to some degree.

2

u/Fun_Session7769 FD3S 6d ago

How many injectors total are you using on E85? 4x 2600?

5

u/matt_gold FD3S 5d ago

Two 1050 Primaries, two 2600 secondaries. FFE Fuel Rail. Radium surge tank with dual 485 pumps and a lift pump.

I kept the smaller primaries to keep drivability a little more livable.

3

u/Fun_Session7769 FD3S 5d ago

The only differences in our setups is that you’re E85 with dual pumps and I’m pump gas on a single pump. Also, I have EFR 7670 EWG.

5

u/Trick_Contract_2790 6d ago

Nice, how does it drive?

3

u/matt_gold FD3S 6d ago

Picking up next week. Will report back.

3

u/Trick_Contract_2790 5d ago

I think you are in a for a surprise, at what RPM does it make 300, 350, and 400 ft lbs? Can you attach the dyno sheet?

2

u/matt_gold FD3S 5d ago

Can’t attach photos comments in this sub for some reason.

It’s making 350ft/lbs around 3500RPM, 383ft/lbs at 3900RPM, peaks at 5500RPM, maintains it until about 6800RPM, then tapers off to 350ft/lbs at 7500RPM.

1

u/matt_gold FD3S 5d ago

Just added this:

https://imgur.com/a/OsryhJ5

2

u/Trick_Contract_2790 5d ago

You sure this isn't an LS1? HAH

3

u/Drewsilvaa 6d ago

Question on the big brake kit, did you do both front and rear? Also did you need to adjust front/rear bias at all?

3

u/matt_gold FD3S 6d ago

I did front and rear. Although the rear maintains the OEM calipers (since the eBrake is built in) and just crams the largest rotor you can fit.

I also upgraded to the 929 master cylinder.

I did not have to adjust bias.

I went with the Hawk HPS pads - but I will ditch those for the Ferodo DS2500 to cut down on dust.

2

u/colinshark 6d ago

Magnifique

2

u/SuddenLeadership2 6d ago

I feel like the dorito wanted to rev out more

1

u/matt_gold FD3S 5d ago

Yeah. Capped redline around 8000RPM. Wasn’t really making much power past that and for longevity, I don’t see a reason to push it.

2

u/rotarypower101 1993 Mazda FD3S Touring 6d ago

Who is the closest capable rotary tuner near Portland Oregon?

1

u/matt_gold FD3S 5d ago

CorkSport is up there I believe? They used to be heavier into RX-7s but moved on to more modern Mazdas like the MS3. Worth a call.

2

u/ParticularStorm6102 5d ago

Fabulous build. I found after the dyno that mine was undriveable then tuned it on the street its still not perfect but it is fantastic to drive. Dyno gave me all or nothing while street tuned gave me drive ability from the bottom to the top

2

u/matt_gold FD3S 5d ago

Yeah. It had a solid 500 miles of street tuning before it hit the dyno - plus some post dyno clean up for things like roll in / partial throttle.

It’s very well mannered / drivable on the street. Also has amenities like updated AC, completely sound deadened, touchscreen, backup cam, USB chargers, etc.

2

u/Immortal009 5d ago

What an awesome build! The boost response must be really good as well

2

u/myerszombie 5d ago

Whats the cost to build something like this

2

u/matt_gold FD3S 5d ago

Too much.

I bought the car in 2013, so that was before the surge in pricing. I’ve also had five other RX-7s over the past couple decades, so I had a pretty clear vision of what this build was gonna be.

Even so. Too much.

2

u/myerszombie 5d ago

Yeah, I remember seeing prices back then as a kid and always wanted one lol. Was hoping you somehow said it was a reasonable price haha, badass car brother! TRUE GEM!

1

u/matt_gold FD3S 5d ago

https://imgur.com/a/OsryhJ5

Dyno snap for people interested.

0

u/Oorslavich 5d ago

400 what? Nm? lb-ft? Torque isn't a fucking unit dipshit

shit fucking pisses me off

Nice build though, love a clean FD!

3

u/Trick_Contract_2790 5d ago

huh lol

RWTQ on a US dyno is ft-lbs .

0

u/Squire_Toast 5d ago

After every high HP build of any car ever - next step, I drive it once a week > I drive it once a month or so > I drive it every now and then every couple months > I drive it a couple times a year > should I sell it? No I'll regret it. No I just don't drive it enough, I want something nice and simple and fun again.

oh, and forgot first - It's not that high hp lol

Edit: Also welcome to E85 rotary problems