Max. boost on T76?
#28
Here is my recommendation on jetting your setup. Remember this is only my recommendation from my experience. You do not need to take my advice I am just going to put it out there for you to consider.
I would use the following in your scenario:
Weber 40 IDF
160 Air Corrector Jet
F-3 Emulsion Tube
215-230 Main Fuel Jet
32mm Choke
This recipe should make roughly 400 RWHP with your turbo set to 12-14psi.
I have a part you might be interested in it is a rare 40 IDF top that has a Fuel Enrichment circuit built into the carb top. No gimmicks or BS I run these really old 40 IDF Weber tops on my own car. If your interested I can provide a picture to compare against what you have on your car.
Albert Mets
I would use the following in your scenario:
Weber 40 IDF
160 Air Corrector Jet
F-3 Emulsion Tube
215-230 Main Fuel Jet
32mm Choke
This recipe should make roughly 400 RWHP with your turbo set to 12-14psi.
I have a part you might be interested in it is a rare 40 IDF top that has a Fuel Enrichment circuit built into the carb top. No gimmicks or BS I run these really old 40 IDF Weber tops on my own car. If your interested I can provide a picture to compare against what you have on your car.
Albert Mets
#29
Rotary Enthusiast
Thread Starter
Join Date: Nov 2002
Location: Jax, FL
Posts: 1,060
Likes: 0
Received 0 Likes
on
0 Posts
The picture would be cool.
I have not figured out how to remove/ install new venturis, otherwise I might try what you are talking about since I have a spare carb at home.
I also have a gross? jet that meters fuel and is connected to the float, do you know what I am talking about?
I have not figured out how to remove/ install new venturis, otherwise I might try what you are talking about since I have a spare carb at home.
I also have a gross? jet that meters fuel and is connected to the float, do you know what I am talking about?
#30
Rotary Enthusiast
Thread Starter
Join Date: Nov 2002
Location: Jax, FL
Posts: 1,060
Likes: 0
Received 0 Likes
on
0 Posts
#31
Rotary Enthusiast
Join Date: Mar 2001
Location: Edwards, CA
Posts: 1,023
Likes: 0
Received 0 Likes
on
0 Posts
-The y-axis (vertical) is your boost in bar. To convert psi to bar psi+14.7/14.7 = bar.
#33
Rotary Enthusiast
Join Date: Mar 2001
Location: Edwards, CA
Posts: 1,023
Likes: 0
Received 0 Likes
on
0 Posts
So on my T04E 60 trim My "sweet spot" would be 2 bar right? How much boost is that in psi?
No no no! You can't talk terms of efficiency by pressure alone -you have to know how much air is going through your engine. "How much psi is the sweet spot?" questions cannot be answered without knowing more.
To answer your question, if your engine flowed 26-32 lb/min of air at WOT at the hp peak, your sweet spot would be ~1 atm (14.7 psi).
#35
Rotary Enthusiast
Join Date: Mar 2001
Location: Edwards, CA
Posts: 1,023
Likes: 0
Received 0 Likes
on
0 Posts
There's the rub. Since we don't have mass air meters, you would have to determine it some other way. I'm guessing here now but, if you know the BSFC and the hp, I think you can back out airflow. Same with air/fuel ratios -you can log the amount of fuel going in, look at the AFR, and back out an approximate air flow number. Anyone know for sure?
#40
Brother of the Rotary
iTrader: (2)
Originally posted by RX7withNitrous
So on my T04E 60 trim My "sweet spot" would be 2 bar right? How much boost is that in psi?
So on my T04E 60 trim My "sweet spot" would be 2 bar right? How much boost is that in psi?
The 60-1's sweet spot is at 1.7 bar (10 psi).
The "60" trim needs 2.4 bar to make what the 60-1 makes at 1.7
#45
Brother of the Rotary
iTrader: (2)
Originally posted by RX7withNitrous
ok so should i be running 29psi or 10psi?
ok so should i be running 29psi or 10psi?
For the T04E 60-1, the sweetspot is 10psi. That should give you anywhere from 300-400 bhp depending on certain factors.
Nobody running 29 psi on a 60-1, lol. That puts you off the charts...
...no to mention that you'd need race gas and a standalone EMS.
#46
Rotary Enthusiast
Join Date: Mar 2001
Location: Edwards, CA
Posts: 1,023
Likes: 0
Received 0 Likes
on
0 Posts
10 psi = 1.68 bar = 1.7 rounded up.
#48
Rotary Enthusiast
Join Date: Mar 2001
Location: Edwards, CA
Posts: 1,023
Likes: 0
Received 0 Likes
on
0 Posts
No, he's was looking at the pressure ratio of 1.68 for your turbo. P2c/P1c = 1.68 this is ~1.68 x ambient pressure = 24 psi. Now you have to subract the ambient to get the guage so: 24-14 = 10 psi on your boost guage -assuming your engine takes in the corresponding amount of air of the compressor map.