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Skunk2 intake manifold

 
Old 10-29-2016, 10:09 AM
  #81  

 
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S2000ellier do you got the measurements on the Jenvey or OBX ITB's?
Here is a working link Calculation Of Intake Runner Length
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Old 10-29-2016, 04:50 PM
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Originally Posted by f20kills
your link doesn't work but if it makes power that's all I care about at this point lol

ill find out soon enough what I make lol

did you go threw with the tune today?
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Old 10-30-2016, 05:35 AM
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Originally Posted by siik_ap2
did you go threw with the tune today?
Car was dropped off for mani install. Should be done in a few days. I'll update for sure when I get the results
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Old 10-31-2016, 07:00 AM
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Originally Posted by f20kills
I feel I want peak torque somewhere around 5-6krpm. So I measured and even though I read your post...don't be surprised if I did it wrong lol. So from the valve to the back of the plenum was 11.5".

Runners from valve to end of runners was 7.5" I don't have the proper tool to measure the inside width of the runners but my guess is 2.5" with my ghetto measuring
Not back of Plenum, to the end of the runner. So you are at 10 inches it looks like.
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Old 10-31-2016, 08:04 AM
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Originally Posted by Mrsideways
Not back of Plenum, to the end of the runner. So you are at 10 inches it looks like.
My runners are 5" on just the mani alone...7,5" to back of valve seat.....regardless car is at the shop lol. I did a baseline a few months back but not sure if they saved the file.
If not ill get another baseline and everything should be done by Thursday at the latest. If I lose power its coming out and selling it same day lol
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Old 10-31-2016, 08:08 AM
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Originally Posted by s2000ellier
so the fbm runner is only 5" excluding the head and the plenum, pretty short...

you can use this site to figure out optimum lengths
Calculation Of Intake Runner Length

87mm bore
89mm stroke (f24)
peak tq around 6900

basically means you want 2" (50mm) diameter runners, OEM is 51ish, and 9.5" runners, OEM runners are 7.5", (+2.5" from head) 12" total runner length
Assuming the use of a modified K24 crankshaft, shouldn't the stroke for F24 be 99mm?
What did you put in that webform for "Duration intake valve (degrees)"?
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Old 10-31-2016, 09:55 AM
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Originally Posted by snitm
Assuming the use of a modified K24 crankshaft, shouldn't the stroke for F24 be 99mm?
What did you put in that webform for "Duration intake valve (degrees)"?
yeah you're right, i typed 89, but 99 is the stroke

"duration intake valve" is the cam duration, ap1 is 295 / 2
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Old 10-31-2016, 12:17 PM
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Originally Posted by flanders
S2000ellier do you got the measurements on the Jenvey or OBX ITB's?
Here is a working link Calculation Of Intake Runner Length
5.5" without air horns, 9.5" with air horns.
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Old 11-03-2016, 07:49 AM
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Small update. Should be on the dyno later today. Baseline was 249 on this dyno 2 days ago. Ignore the ghetto catch can lines lol..thats temporary :P

BASE DYNO...no FBM dyno numbers yet

RPM is off by 400 for some reason. Shift the power band 500 RPM. My rev limit is 8200.





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Old 11-03-2016, 09:10 AM
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Originally Posted by f20kills
Small update. Should be on the dyno later today. Baseline was 249 on this dyno 2 days ago. Ignore the ghetto catch can lines lol..thats temporary :P

BASE DYNO...no FBM dyno numbers yet

RPM is off by 400 for some reason. Shift the power band 500 RPM. My rev limit is 8200.






Save the dyno files! not the graphs but the drf file, they are stored on the computer
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