Armilite
Well-Known Member
Well we hashed out a 277UL Tuned Pipe, let's figure out some Tuned Pipes for the 377UL - 377/380 - 380HO!
Peak Flow/HP Calc.
http://www.mk5cortinaestate.co.uk/calculator3.php
Nice Port Timing Duration Calculator.
http://www.csgnetwork.com/timingportdurationcalc.html
Info Needed: 377UL 377/380(9.6cr)
Engine CC: Stock is 368.4cc
Engine Duration:
Exhaust Port Width(mm):
Exhaust Port Height(mm):
Exhaust Port Length(mm):
Target HP: 35hp Stock
Target Rpm: Stock 6500rpms
Coefficient: 2.0 (1.0-2.0) 2.0 gives a Wider Power Band!
Info Needed: 380HO(11.2cr)
Engine CC: Stock is 368.4cc
Engine Duration:
Exhaust Port Width(mm):
Exhaust Port Height(mm):
Exhaust Port Length(mm):
Target HP: 51hp
Target Rpm: 6500rpms
Coefficient: 2.0 (1.0-2.0) 2.0 gives a Wider Power Band!
I suggest using this cheap Tuned Pipe and Cone Programs. His program will figure your Port Duration based on your Exhaust Port Data and Rod length.
The 377 use's a 120mm Rod. The Demo Program is crippled, so don't use it for any Numbers, till you Buy it.
http://ypvsbox.free.fr/?lang=en_us
The Cone Program for changing the Shape for turns out put's DXF CAD Files any good shop can cut out the pieces if you can't.
You can download the Free Smart Phone Ap, 2 Stroke Exhaust Calc and run on your Desktop with a Free program called Blue Statcks!
https://play.google.com/store/apps/d...ust.calc&hl=en
A Free 2D CAD program can be downloaded from www.emachineshop.com that can also open DXF CAD Files.
277UL (268cc) at just 90% efficent and using 6500rpms is capable of making 37hp! Using 11.8cr!
377UL (368cc) at just 90% efficent and using 6500rpms is capable of making 51hp! Using 9.6cr!
447UL (436cc) at just 90% efficent and using 6500rpms is capable of making 60hp! Using 9.6cr!
503UL (496cc) at just 90% efficent and using 6500rpms is capable of making 68hp! Using 10.8cr!
532UL (521cc) at just 90% efficent and using 6500rpms is capable of making 72hp! Using 11.5cr!
582UL (580cc) at just 90% efficent and using 6500rpms is capable of making 80hp! Using 11.5cr!
Peak Flow/HP Calc.
http://www.mk5cortinaestate.co.uk/calculator3.php
Nice Port Timing Duration Calculator.
http://www.csgnetwork.com/timingportdurationcalc.html
Info Needed: 377UL 377/380(9.6cr)
Engine CC: Stock is 368.4cc
Engine Duration:
Exhaust Port Width(mm):
Exhaust Port Height(mm):
Exhaust Port Length(mm):
Target HP: 35hp Stock
Target Rpm: Stock 6500rpms
Coefficient: 2.0 (1.0-2.0) 2.0 gives a Wider Power Band!
Info Needed: 380HO(11.2cr)
Engine CC: Stock is 368.4cc
Engine Duration:
Exhaust Port Width(mm):
Exhaust Port Height(mm):
Exhaust Port Length(mm):
Target HP: 51hp
Target Rpm: 6500rpms
Coefficient: 2.0 (1.0-2.0) 2.0 gives a Wider Power Band!
I suggest using this cheap Tuned Pipe and Cone Programs. His program will figure your Port Duration based on your Exhaust Port Data and Rod length.
The 377 use's a 120mm Rod. The Demo Program is crippled, so don't use it for any Numbers, till you Buy it.
http://ypvsbox.free.fr/?lang=en_us
The Cone Program for changing the Shape for turns out put's DXF CAD Files any good shop can cut out the pieces if you can't.
You can download the Free Smart Phone Ap, 2 Stroke Exhaust Calc and run on your Desktop with a Free program called Blue Statcks!
https://play.google.com/store/apps/d...ust.calc&hl=en
A Free 2D CAD program can be downloaded from www.emachineshop.com that can also open DXF CAD Files.
277UL (268cc) at just 90% efficent and using 6500rpms is capable of making 37hp! Using 11.8cr!
377UL (368cc) at just 90% efficent and using 6500rpms is capable of making 51hp! Using 9.6cr!
447UL (436cc) at just 90% efficent and using 6500rpms is capable of making 60hp! Using 9.6cr!
503UL (496cc) at just 90% efficent and using 6500rpms is capable of making 68hp! Using 10.8cr!
532UL (521cc) at just 90% efficent and using 6500rpms is capable of making 72hp! Using 11.5cr!
582UL (580cc) at just 90% efficent and using 6500rpms is capable of making 80hp! Using 11.5cr!
