heading to Dyno Tonight guess my numbers?
07-14-09, 02:56 PM
#1
High Comp Booster
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Oakville, Ontario
Posts: 1,907
Likes: 0
Received 0 Likes
on
0 Posts
heading to Dyno Tonight guess my numbers?
First car details!
91 s5
RB long tube header,
universal 2" cat (not gutted)
stock exhaust piping pair of ghetto ractive mufflers,
cone filter on stock intake arm,
airpump delete,
5/6th ports wired open,
VDI open
greddy emanage with ignition and injector control
anyone wanna guess digits before i post em tonight?
hint my car hits 90-91 mph in the 1/4 mile with full weight
91 s5
RB long tube header,
universal 2" cat (not gutted)
stock exhaust piping pair of ghetto ractive mufflers,
cone filter on stock intake arm,
airpump delete,
5/6th ports wired open,
VDI open
greddy emanage with ignition and injector control
anyone wanna guess digits before i post em tonight?
hint my car hits 90-91 mph in the 1/4 mile with full weight
07-15-09, 09:37 AM
#6
Engine, Not Motor
iTrader: (1)
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes
on
91 Posts
150 if you are lucky. You are going to suffer a massive midrange and low end loss of torque with the ports wired open. With the VDI open, doubly so. The car may be slower due to both of these "mods".
07-15-09, 05:44 PM
#7
High Comp Booster
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Oakville, Ontario
Posts: 1,907
Likes: 0
Received 0 Likes
on
0 Posts
the way i look at it is that if im on the circuit shifting at 8k i wont really drop below 6500 ideally there may be a hairpin where its slow speed but id rather have less vacuum lines and electronics in the engine bay
it dyno'd at 110 all stock with the ports closed and the vdi closed with 114 ft pounds so ill be able to get an idea of what im loosing through out the power band
Im pretty sure it'll be north of 150 just cause... i know i've pulled Civic si's, civic's with Gsr swaps on the highway ya don't ask me bad
i keep getting canceled at tag for my 3 pulls
Aaron is there anywhere on the forum that shows dyno graphs with the ports open and closed? id like to see where the loss is in the rpm thxs
Trending Topics
07-15-09, 08:49 PM
#9
If you want to compare on working ports vs. not working ports, maybe we can meet up one day.
I have working ports and dyno'ed around 150ish on a mustang dyno.
I have working ports and dyno'ed around 150ish on a mustang dyno.
I'm building the car for circuit so the motor will be lucky to see below 55-6000 rpm so i'm not really worried about the change in the powerband
the way i look at it is that if im on the circuit shifting at 8k i wont really drop below 6500 ideally there may be a hairpin where its slow speed but id rather have less vacuum lines and electronics in the engine bay
it dyno'd at 110 all stock with the ports closed and the vdi closed with 114 ft pounds so ill be able to get an idea of what im loosing through out the power band
Im pretty sure it'll be north of 150 just cause... i know i've pulled Civic si's, civic's with Gsr swaps on the highway ya don't ask me bad
i keep getting canceled at tag for my 3 pulls
Aaron is there anywhere on the forum that shows dyno graphs with the ports open and closed? id like to see where the loss is in the rpm thxs
the way i look at it is that if im on the circuit shifting at 8k i wont really drop below 6500 ideally there may be a hairpin where its slow speed but id rather have less vacuum lines and electronics in the engine bay
it dyno'd at 110 all stock with the ports closed and the vdi closed with 114 ft pounds so ill be able to get an idea of what im loosing through out the power band
Im pretty sure it'll be north of 150 just cause... i know i've pulled Civic si's, civic's with Gsr swaps on the highway ya don't ask me bad
i keep getting canceled at tag for my 3 pulls
Aaron is there anywhere on the forum that shows dyno graphs with the ports open and closed? id like to see where the loss is in the rpm thxs
07-16-09, 12:47 AM
#10
High Comp Booster
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Oakville, Ontario
Posts: 1,907
Likes: 0
Received 0 Likes
on
0 Posts
07-16-09, 08:23 AM
#12
Engine, Not Motor
iTrader: (1)
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes
on
91 Posts
I think there are some dyno graphs in the 2nd gen dyno subforum that have port information. Generally you can tell wired vs. non wired ports because the peak power is the same, but the wired ports have a lot less torque in the midrange. I don't have a collection of them off hand though since I have never dyno'd an NA rotary and wouldn't have bothered to make a run with the ports closed vs. wired.
Yeah, I guess on a full track car it's a different story as far as the ports go. In that case there probably isn't much harm in wiring them open but there will be a time when you exit the corner in the wrong gear and wish they worked.
Yeah, I guess on a full track car it's a different story as far as the ports go. In that case there probably isn't much harm in wiring them open but there will be a time when you exit the corner in the wrong gear and wish they worked.
07-16-09, 02:49 PM
#14
High Comp Booster
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Oakville, Ontario
Posts: 1,907
Likes: 0
Received 0 Likes
on
0 Posts
ya i know there may be a time where i wish i had a bit more midrange coming out of a corner but not too worried bout it ive drivin it on a track and im usually pretty good at getting my gears right
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM