ive made my decision im going to build my own single setup with using a t76 and a .7x exhaust side. i know ill have lag up the ass for street driving (i want that) for gas mileage purposes. what injectors should i run if i plan to have to spool to 20psi? i know my motor will take it easily (if it doesnt, its not built correctly).



is 20psi attainable with tuning on a pfc (or do i need a big ass map sensor) i was thinking on going 850/1700 or something like that. i already know which fuel system ill be running (either aeromotive a100 or weldon pump through all an lines etc etc)....



i dont plan on having the turbo fully spool till 4500 or 5k. or is the lag going to be worse than that?



when i say t-76 i mean BISS ASS TURBO, not t04 size.

Papa, I think that T-76 will come on a bit later then 4500. I am running a T-72 with large street port and it comes on hard at 4500 so I think that the T-76 will be a more laggy and come on around 5000?



I built My street car for show and go. I tried this T-72 and I think I will be swapping to a T-66 this Winter as I have become tired of the lag. Dont get Me wrong because when You hit 4500 hold on it is enough to still scare Me and if i take someone for a ride they are frightened. After I had My tranny rebuilt I took the Guy who did the work for a ride to see if everything worked fine. I told Him to hang on and pinned it going about 50 MPH and the car went crazy. I seen Him get scared and He told me that He has driven in alot of modified big blocks but has never been in a car that pulled so hard in the upper RPM.That being said, it is still a bit harder to drive then I would like and I am thinking that a turbo that would come on around 4000 RPM would be a bit more streetable.



I run My car at 18 PSI and 20 sometimes but I am think it is at the begining of the effciency range of the T-72. I should be running it at 23-26 PSI to really get the bennifits from the large comp. If You just want to run 20 PSI I would not get the T-76 and go for a T-70 ot T-66.



I am running the Aeromotive pump with 750/1680 injectors and was running AFR in the low 10`s and I maxed the injectors out at 97.7 % @20 PSI. Since then I have pulled more fuel and My injector duty has dropped enough to run a couple more PSI. I here the Weldon is a great pump and might put out more then the Aeromotive.



You will need the GM 3 bar map sensor for The PFC and with the Datalogit You can tune Your car for 20 PSI, just start out very rich.



If You wait a month or so I will be selling My newly rebuilt T-72 with about 400 miles on it ifYou are interested.



Steve

What exhaust housing and wheel are you using? If you are going to run the same hot side on the T66 you will be very disappointed. I predict that you will at the most spool maybe 300 rpm's faster. Since when is 4500 rpm's laggy? Are you starting to make boost at 4500, or are you hitting 20 psi at 4500?



Papa I believe by running the AR.7X exhaust housing with expectations of hitting big HP, you will be very disappointed when the car feels sluggish and falls off quickly on the top end because your exhaust housing is to small.

What exhaust housing and wheel are you using? If you are going to run the same hot side on the T66 you will be very disappointed. I predict that you will at the most spool maybe 300 rpm's faster. Since when is 4500 rpm's laggy? Are you starting to make boost at 4500, or are you hitting 20 psi at 4500?



Papa I believe by running the AR.7X exhaust housing with expectations of hitting big HP, you will be very disappointed when the car feels sluggish and falls off quickly on the top end because your exhaust housing is to small. [/quote]

I was going to say, isnt a a/r of .7 a little smallish??

If you want to run a big ass mofo like that on the street you have to port for it , half bridge , semi pp etc. https://www.nopistons.com/forums/pub...IR#>/smile.png

.7 is too small for a rotary. Also, the T76 is even bigger than a T78. Just something to keep in mind. If you want to save gas, a laggy turbo isn't the way to do it. You'll waste fuel flooring and lugging it. If you want better fuel economy, adjust your driving style.

sorry it took me a while to reply to this. my style is driving under 4k rpms. i have a LARGE streetported motor and i leave a light at 2k rpms (wont move under 1500) i will be very interested in buying the 72 off of you as well as anything else you have up for sale. if it is a true t72 then great, i just dont want some t51r or hks this or that, just not enough power. i use my car as a daily driver to anf from school (5 min away) and dont floor it at every light, now im used to having no boost because of my split ic pipe and im happy with how it preforms n/a for daily driving.





pm me with how much u may sell it for as well as anything else u can help me on (mainly output numbers etc) my car is running rich as hell right now and i get about 8mpg without beating on it. if this turbo doesnt work out the way i want it. im going to sell the rotary and go with the well hated ls1 conversion, so i would like to get the project rolling asap before i decide to sell it.



thanks everyone for their input on this it is much appreciated.

I will PM You about the info and it is a true T-72 from Turbonetics that I just had rebuilt.



I was having the same thoughts as You were about doing the conversion and then I got the car to run the way it was meant and I am very happy with the Rotary and proud that it makes as much power as it does. I took home the hardware for the most RWHP running against some Big block modifieds on a portable Dyno at a show I was at a few weeks ago. If You like crazy fast the T-72 will sit You back in the seat. The open Racegate I run is a little loud under full boost so I would recomend plumbing that into the DP if You are using the car as a daily driver. I would also make sure You have a good wide band to tune Your car. I have been running pump gas @18 PSI and 20 sometimes with no signs of detonation.



Not sure where You are located but I can help with a custom mani and a few other suppliers that stood out above the rest for Your fuel parts.I am new at this compared to some but I think if You build a good fuel system and tune from rich, the rotary is very amazing and strong.



Steve

im in chicago. i have enough fuel for my setup now, and i believe an aeromovitve a1000 will do the job for the pump and all -6 an lines going to the rails will help as well. i was thinking on a sx fpr for it or an aeromotive unit. im attempting to keep the costs down on this so i can spend more money on other things for my car (paint mostly).



theres not much left for me to do to go single except for the usual things (manifold, turbo, and lines) ill have everything else by the time i can have the turbo installed.