Cosworth Plenum FI/NA: Pics Inside!
11-07-2006, 12:52 PM
#82
Registered User
iTrader: (7)
Join Date: May 2004
Location: San Diego
Posts: 270
Likes: 0
Received 0 Likes
on
0 Posts
i dunno....
this board is funny like that. plus Tim has only made a handful of these i think. The entry price without some documentation probably stops some, But people jumped on the blingin' kinetix, ... so .... ?
this board is funny like that. plus Tim has only made a handful of these i think. The entry price without some documentation probably stops some, But people jumped on the blingin' kinetix, ... so .... ?
11-07-2006, 01:44 PM
#83
Professional
iTrader: (7)
Join Date: Jan 2004
Location: Home
Posts: 1,211
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by NoLimit
i dunno....
this board is funny like that. plus Tim has only made a handful of these i think. The entry price without some documentation probably stops some, But people jumped on the blingin' kinetix, ... so .... ?
this board is funny like that. plus Tim has only made a handful of these i think. The entry price without some documentation probably stops some, But people jumped on the blingin' kinetix, ... so .... ?
11-07-2006, 03:13 PM
#84
The flow diagrams that Cosworth showed me, clearly show a decrease in airflow to the front cylinders on the stock manifold. The Cosworth improves the distribution, but there is still less air to the front cylinders. Regardless of plenum design, it is virtually impossible to design a realistic plenum that delivers perfect distribution to all cylinders. Optimizing is the best one can hope for. And with sufficient collector volume, its not an issue. An engine does not operate on a flow bench...ie...air will travel to the path of least resistence, which happens to be an open valve. 
Most high end engine management systems, and even some lower end models, allow for individual cylinder trims. We always add additional fuel to rear cylinders, just to be safe.
Most high end engine management systems, and even some lower end models, allow for individual cylinder trims. We always add additional fuel to rear cylinders, just to be safe.
11-07-2006, 06:27 PM
#86
Vendor - Former Vendor
iTrader: (11)
Join Date: Oct 2003
Location: San Diego
Posts: 1,353
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by taurran
SFR was working on a manifold but I think the project died. It had longer runners than most.
http://www.speedforceracing.com/prod...y_g35imani.php
The Kinetix SSV has longer runners, but we all know that got them nowhere.
Besides, turbocharged Z's aren't hurting for low end power, it's carrying it out to redline thats the hard part.
http://www.speedforceracing.com/prod...y_g35imani.php
The Kinetix SSV has longer runners, but we all know that got them nowhere.
Besides, turbocharged Z's aren't hurting for low end power, it's carrying it out to redline thats the hard part.
We actually came up with our final design (third revision) and have sold it to a few beta testers. Unfortunately, people who have bought the plenum have their fricken cars in pieces or not finished yet! Arggggg!
That hasnt stopped us though
A few weeks ago we put it on a rev-up G35 with a brand new motor, clutch, turbos, etc...... and dynoed it to the tune of +50 ft/lbs of torque at the wheels, at 4000 rpms. We only revved the car out to 4500 rpms and we only ran it at 7.8 psi of boost, since the motor had no miles on it (and we wanted to break it in easily). Both banks had AFRs that were within 1% of each other. We didnt measure eGT's but we will when the car is broken in and we crak upthe boost to 15-16 psi.What I noticed was the effect on spool-upthe plenum had. Outrageous! Much faster then my car and I have 10.3 to 1 compression vs. the built car which has 8.6 to 1 compression. Both cars have the same size 60-1 turbos. We will be finishing our dyno testing on this twin turbo car in about two weeks. We also have a N/A test car that we will put the plenum on very soon.Finally, sorry for lagging on the project guys. R&D takes time and we wanted to get it right.We werent too concerned about rushing it to the market without fully testing it and determining the optimum runner length and plenum volume. We have that nailed and now it is time to see what that translates too as far as horsepower is concerned
Tim
11-07-2006, 06:48 PM
#87
Registered User
iTrader: (3)
Join Date: Jan 2005
Location: NY
Posts: 1,895
Likes: 0
Received 0 Likes
on
0 Posts
The Cosworth doesn't look all that different from the stock plenum design in terms air entry. I'm sure overall volume will play a factor as well but I don't think it will be all that much different than current plenums offered...but we'll see as Sharif said.
On the other hand..the one that Tuarran posted seems much more efficient as their is separate piping for each of the 3 cylinders whereas the Cosworth will be distributing to all 6 cylinders through one pipe at the top....still potentially lacking air flow to the 5th and 6th cylinders. I know there is much more involved than simply the design as I see it.....but I'm just speculating more than anything
On the other hand..the one that Tuarran posted seems much more efficient as their is separate piping for each of the 3 cylinders whereas the Cosworth will be distributing to all 6 cylinders through one pipe at the top....still potentially lacking air flow to the 5th and 6th cylinders. I know there is much more involved than simply the design as I see it.....but I'm just speculating more than anything
Last edited by zman1910; 11-07-2006 at 10:45 PM.
11-08-2006, 12:21 AM
#90
Registered User
iTrader: (2)
Join Date: Jan 2003
Location: Australia
Posts: 1,647
Likes: 0
Received 0 Likes
on
0 Posts
I AM SOOOOO IN FOR THAT PRODUCT!!! I think it will help my N/A tuned 350Z screams all the way to the current 8200rpm fuel cut!
cheers,
richie
cheers,
richie
Last edited by Z350Lover; 11-08-2006 at 12:43 AM.
11-08-2006, 03:41 AM
#91
New Member
iTrader: (2)
Join Date: Jan 2004
Location: Riyadh, SA
Posts: 1,295
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by TurboTim
We actually came up with our final design (third revision) and have sold it to a few beta testers. Unfortunately, people who have bought the plenum have their fricken cars in pieces or not finished yet! Arggggg!
That hasnt stopped us though A few weeks ago we put it on a rev-up G35 with a brand new motor, clutch, turbos, etc...... and dynoed it to the tune of +50 ft/lbs of torque at the wheels, at 4000 rpms. We only revved the car out to 4500 rpms and we only ran it at 7.8 psi of boost, since the motor had no miles on it (and we wanted to break it in easily). Both banks had AFRs that were within 1% of each other. We didnt measure eGT's but we will when the car is broken in and we crak upthe boost to 15-16 psi.What I noticed was the effect on spool-upthe plenum had. Outrageous! Much faster then my car and I have 10.3 to 1 compression vs. the built car which has 8.6 to 1 compression. Both cars have the same size 60-1 turbos. We will be finishing our dyno testing on this twin turbo car in about two weeks. We also have a N/A test car that we will put the plenum on very soon.
Finally, sorry for lagging on the project guys. R&D takes time and we wanted to get it right.We werent too concerned about rushing it to the market without fully testing it and determining the optimum runner length and plenum volume. We have that nailed and now it is time to see what that translates too as far as horsepower is concerned
Tim
That hasnt stopped us though
A few weeks ago we put it on a rev-up G35 with a brand new motor, clutch, turbos, etc...... and dynoed it to the tune of +50 ft/lbs of torque at the wheels, at 4000 rpms. We only revved the car out to 4500 rpms and we only ran it at 7.8 psi of boost, since the motor had no miles on it (and we wanted to break it in easily). Both banks had AFRs that were within 1% of each other. We didnt measure eGT's but we will when the car is broken in and we crak upthe boost to 15-16 psi.What I noticed was the effect on spool-upthe plenum had. Outrageous! Much faster then my car and I have 10.3 to 1 compression vs. the built car which has 8.6 to 1 compression. Both cars have the same size 60-1 turbos. We will be finishing our dyno testing on this twin turbo car in about two weeks. We also have a N/A test car that we will put the plenum on very soon.Finally, sorry for lagging on the project guys. R&D takes time and we wanted to get it right.We werent too concerned about rushing it to the market without fully testing it and determining the optimum runner length and plenum volume. We have that nailed and now it is time to see what that translates too as far as horsepower is concerned
Tim
Sorry Tim
.... But soon we will all see the +800whp 350Z
I only have one issue (the one that you are working one
)Az
PS: I might have a Motec be the time I get the parts from you guys
11-08-2006, 04:38 AM
#93
New Member
iTrader: (2)
Join Date: Jan 2004
Location: Riyadh, SA
Posts: 1,295
Likes: 0
Received 0 Likes
on
0 Posts
What's going on Richie, all is well I hope?
Most likely .. yes
We have a local guy that told me that he could get me a good deal on a Motec .. but I'm still looking around ... And Simon .. I guess is the best, hands down
Any thoughts?
Az
Most likely .. yes
We have a local guy that told me that he could get me a good deal on a Motec .. but I'm still looking around ... And Simon .. I guess is the best, hands down
Any thoughts?
Az
11-08-2006, 05:40 AM
#94
New Member
iTrader: (13)
Originally Posted by Z350Lover
I AM SOOOOO IN FOR THAT PRODUCT!!! I think it will help my N/A tuned 350Z screams all the way to the current 8200rpm fuel cut!
cheers,
richie
cheers,
richie
if you are n/a running a utec and you raised the rpm limit to 82000..thats pretty dangerous... from 6800 maybe to 7200....
11-08-2006, 06:13 AM
#96
Originally Posted by redline350ZZ
Would it be hard to swap to a cabled TB and discard the DBW entierly? Then we could run as big a TB as we wanted too...
But I want to thoroughly research the actual bottleneck. The throttle body is one piece of the equation.
11-08-2006, 11:22 AM
#99
Registered User
iTrader: (7)
Join Date: Jul 2005
Location: New Hampshire
Posts: 348
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by taurran
Is anyone working on something similar to this one in design?
I know routing the throttle body and piping up front would be a problem, but I'd like to be able to bypass the turbo mounted area on the single turbo kit altogether. It should also flow much better than wrapping around back.
I know routing the throttle body and piping up front would be a problem, but I'd like to be able to bypass the turbo mounted area on the single turbo kit altogether. It should also flow much better than wrapping around back.