zammm

iTrader: (6)

I'm building my FD for mostly street with some track days hopefully...Looking to make about 450/500whp with minimal lag. I decided to go with the precision 6766 and was wondering what options you guys would go with.

Right now I'm thinking about going with the T4 divided .84 A/R

the other option would be the T4 divided 1.0 A/R



My other question is should I go with

"Ported H" compressor cover 4.0" inlet/3" outlet

or

"Ported S" compressor cover 4.0" inlet/2.5" outlet

I was leaning more towards the "Ported S" for less lag.


Thanks guys!

Max

dabigesii

iTrader: (4)

I don't auto x but I have a 6766 and I did the ported H cover with divided t4 1.00 hot side and I get full boost (18psi) by 4200rpm and pulls hard all the way to 8500rpm.

fendamonky

iTrader: (6)

Truthfully you should be able to hit your power goals with a PT6265 (or PT6266). I was bumping into the 470whp range with my PT6265 without stressing the turbo too much (staying below 20psi). I was also seeing full boost by about 3,600-3,800rpms.

G's 3rd Gen

iTrader: (11)

67 is going to lag a bit . 62 will be more suitable and responsive for the street

TheAsset

iTrader: (11)

PT6265/PT6266 will be more than enough for you.

The turbo will do 500rwhp without getting too crazy. I have some dyno sheets and a video in my build thread.

thewird

iTrader: (8)

Get the S cover unported. The H cover has a weird powerband, it "comes on/wakes up" around 5-5.5k. I personally tried both.

thewird

unwritten-dinasty

Just like you my car is 100% street with 2 o 3 track days a year, went with PT6766 with 1.00 divided. I have full boost at 3,900rpm. Great turbo, lots high end power.

danameisoj

iTrader: (6)

Is this turbo really ideal for the lower boost levels? I know the piston guys have to ring them to 35+ psi to get into its efficiency range.

lots of us aren't taking these turbos into their efficiency ranges.
if i recall smg944 didn't really start making goodpower to warrant the size of the turbo till 25psi

would it not be better to use a smaller turbo and still make the 500?

correct me of i'm wrong please. i'm still use to the Evo world where we ramp up the boost to 35-40 on stock motors lol

mono4lamar

iTrader: (32)

I sent you a very helpful pm with some good advise. Let me know if you need anymore information.

okevin

iTrader: (1)

i got a 6266 1.15 a/r 40 miles on it 4sale, i never got to push it barely got into seeing any boost , just once or twice at 10psi, saw full boost at around 3800 rpms just as fendamonky said. great turbo , very responsive for a 62mm, and i still got the warranty card unfilled out thats how much ive barely used it, havent had a chance to even fill the card and send it back. good luck with your choices

rx7 SE

iTrader: (5)

I've been going down the same direction. I spoke with Sean at A-spec and he recommended I run a 6466 because the power will come in a little sooner and still make 480+ rwhp at under 20psi or so.

tony94s4

iTrader: (1)

My pte6766 cea bb Ported s with .84 divided pump gas on the same setup as gt4094r .85 divided on e85 up to 5 psi untuned bosted slightly better than 4094, on the on off response it was quite better than 4094, how ever didnt get a chance to test it all out, my tuner over boosted to 22 psi stock map sensor pfc blew the engine on 3rd dyno run, I am building a setup with .96 undivided housing
T4 undivided short manifold on pte 6766 should have it ready soon for tuning

fendamonky

iTrader: (6)

Huh?

You were set for 5psi on a pfc base map and your tuner boosted to 22psi?? So confused by the words you typed... Who is your tuner by chance?

thewird

iTrader: (8)

Someone forgot to set the fuel cut or forgot the stock map sensor was being used.

thewird

rx7 SE

iTrader: (5)

Has anybody gone 'all in' on a 6766 yet? I know that they make more power than the 6765 it replaces and SMG44 (I think) has made a significant amount of power with that.

TheAsset

iTrader: (11)

If/When I get one, I'll def give it a go

tony94s4

iTrader: (1)

I installed the pfc and dont have the datalogit, the fuel ratio was good to around 5-8 psi and i would back off soon as it started braking up, took it to steve kans dyno to tune he was out of town so a friend of ours had the datalogit and started tuning, the car was boosting very fast on the dyno and human error I gues fented a rotor, so on the street it was very responsive

tony94s4

iTrader: (1)

In next few weeks I should have the setup finished, even if it gets couple hundred rpm lag with .96 undivided i will still be happy, I am also working on a setup with twin pte6262cea turbos

dabigesii

iTrader: (4)

I plan on boosting to 30psi once I get fuel sorted out. At 18psi I made 450whp on a mustang dyno. I got full boost at 4200rpm, I'm also using preturbo injection which supposedly slows down spool up. I should be back on the dyno at the end of February to go for 30psi.

rx7 SE

iTrader: (5)

Impressive! Keep us updated on the new numbers at 30psi

fendamonky

iTrader: (6)

Is it just me, or does 450whp at 18psi seems kinda low for a 6766?

dabigesii

iTrader: (4)

Different dynos read different numbers, from what I've heard mustang dynos read low compared to others. I have not gone down the quarter to state trap speeds or time, but I will say I played around against my friend's 600whp supra and we were dead even from 60-150...that was with me starting in third instead of second. The car roasts my 285s bf Goodrich kds at 60mph.

Turblown

iTrader: (12)

The ones I have dynoed( just tuning, not an in house build) have made similar numbers. My experience shows zero reason to run the 6766 below 22/23psi. One is much better off with a 6266 or similar size below those boost pressures. Better response, same power levels, and with a lot less cost...

mendozam

iTrader: (5)

Dont want to thread jack but I just have a quick question. I have been wanting to try this turbo but havent found a local buyer for my old setup. Other than the billet wheel on the Pte does anyone know what the difference between A-spec 500r turbo and the 6766 CEA BB is? As far as my knowledge goes they are both 67mm turbos. Thanks guys.

XLR8

iTrader: (52)

Sean from Aspec will tell you. I was under the impression that Aspec wasnt making the 500r anymore, due to Precision's robust options.