streetdreamzny

iTrader: (6)

just got my turbo back from bullseye today, figured i'll post a pic. its an R85 that i upgraded the compressor wheel to 66mm which i got the idea from BLitzed33 + hope to make as much power as he did.

mono4lamar

iTrader: (32)

Care to elaborate on the cost?

silverflash2

iTrader: (2)

I also have a R85, did they change out the compresser housing also? Mine looks different than yours. I don't have any numbers on mine. It also doesn't have the plate on the side like on yours, that the numbers were grinded off. Mine has been powder coated ,don't know if it was grinded off for the powder coating,but has no traces of it, and it has 3 cirlces bumps on it, and it has the plate on the top and has TEC and some # after it. I bought mine used. Just wondering what was changed on the upgrade, i thought it would just be the internals, but maybe not since you have a different cover. How much did it cost? Hope you put out some nice #.

streetdreamzny

iTrader: (6)

the cost was $800 that included rebuilding the turbo changing compressor wheel to 66mm and new compressor housing and shipping. i hope to make 600 horse but only time will tell .

1wide7

iTrader: (1)

I wonder if you can just buy the compressor wheel and new housing?
my turbo does not need a rebuild and i dont want to pay to ship 40lbs and have the car down while they have the turbo! If i can just bolt on new wheel and housing that would be great

2FAST7S

Hey Nof when will you have it on the road again? R u gonna register it or just track it?
Looks great btw!

2FAST7S

If it was just the housing, no biggie...for the wheel I would send them the center section and have them do their thing.

mono4lamar

iTrader: (32)

I'd like to just get another center section and compressor cover. Swapping the turbine housing and having a spare center section would be nice

Rx7Rocket

i have a question i have a r85 on its way just wondering if any of you don't run an alky-injection i havn't gone that far yet. for now i am just gonna tune @15psi on 93 till i get used to it and then i was thinking about getting the alcohol maybe this summer. the other question i have is how do you like this turbo i don't know anyone with one but have heard good things about it thats why i went with it. any feedback would be great

1wide7

iTrader: (1)

Not everyone on here runs alky (yet) I run mine on 93@ 15psi for street driving thats around 420 to the wheels give or take a few depending on your other mods the turbo spools up pretty fast for not being BB

silverflash2

iTrader: (2)

I will be breaking in my engine and then plan on running 14-15 lbs on the R85,then I'm ordering a alky AI so i can run 28 lbs. Haven't driven it yet, so can't comment on the spool. I read statement some made on here that the turbo is in it's threshold by 2700 rpms. Does that mean it has full boost by 2700 rpms or does it start boosting at 2700 rpms. I also heard that it makes full boost by 3200 or 3700 rpms on a streetport motor. Could somebody please clear this up for a stock R85. Could you also post the same info for the modified R85.

allrotor93

iTrader: (126)

the r85 sucks *** below 20lbs...then good gawd!

streetdreamzny

iTrader: (6)

i liked the way the turbo was stock the only reason i modified it was i needed a new compressor wheel anyway and figured i go bigger when it was apart. i have never run more than 15 pounds but i felt it pulled hard it got me to 11.40 @124. after i break in my motor i'm going to run 24 pounds. as far as full boost is concerned i have not driven the car in months and can't really remember exactly what rpm

1wide7

iTrader: (1)

on my streetport im around 15psi @ 4k rpm give or take a few cause when the turbo comes on i usually stay focused on the road but from 4-redline it pulls like a freight train

Rx7Rocket

ok thanks for the info. as far as my tuner says if i end up going with the AI i should be able to push somewhere around 600-620 rwhp but pushing about 25 psi and somewhere within the range of 410-450 rwhp @15psi on 93. i would love to go AI but just not yet i def. wanna get used to the power w/out it first before i go and wreck it when i am not used to that kind of power.

1wide7

iTrader: (1)

The r-85 stock on a streetport wont reach 600whp Blitzzed maxed the turbo out at mid 500's and at 15psi expect to be below 430whp.

silverflash2

iTrader: (2)

i believe Blitzz maxed out around 585 at 28 psi on stock R85

silverflash2

iTrader: (2)

Hey does anyone here with the r85 and streetport have a Fc map for it?

Rx7Rocket

Man i appreciate the info so if i would put the alchohol on and push about 25 psi i still am not going to be pushing 600?

1wide7

iTrader: (1)

I have a map with 850/1600 on a streetport if your running these injectors i have one

1wide7

iTrader: (1)

Short answer No the turbo does not flow enough for 600whp

1wide7

iTrader: (1)

https://www.rx7club.com/ne-rx-7-forum-30/r85-576433/

Blitzed made 560 @ 27psi maxed out

BLitzed33

it wont hit full boost until 4400 rpms when around 27 lbs, however it does start to spool around 2500 and you will see positive pressure. Now if all you were running was 1 bar, you probably would see boost by around 3900 rpms, give or take a couple either direction depending on your fuel and tune. Alcohol does carry its own supply of O2, however I doubt it will be enough to make 40 more whp with race gas. Mind you, we are talking a street port, not a half bridge or full bridge port.
The only other way to possibly break 600 whp on street port and stock R85 is by spraying nitrous, which by then you are Really over spinning that poor turbo and could run into bearing failures and the heat it is generating is going to be really high since the compressor is WAY out of its efficiency range at that point.

By upgrading the compressor to a 66mm without changing anything to the setup, it squeezed 610 whp at 28 lbs with full boost by 4700, which again, seemed to be all it would flow efficiently.

If you try a full bridge port, you will definitely see more whp per lbs. of boost than I did and could break 600 whp, but it was more of a street car, so I kept away from that setup.

Rx7Rocket

yeah well i think that i will be more than satisfied with whatever i end up with i was only running about 320whp before i pulled the engine and ordered the turbo so its still gonna be a huge jump in power to begin with

mono4lamar

iTrader: (32)

I just send them some questions and they had no idea what an "r85" was. Give me some names and invoice numbers for reference guys!