Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-02-2018, 12:23 PM   #11 (permalink)
Master EcoModder
 
Join Date: Jan 2017
Location: Istanbul
Posts: 478
Thanks: 31
Thanked 45 Times in 34 Posts
Are we talking about this:





Or this :




The first one is very foable, the second one is also doable (for me) but the mnf will take a long time and if it doesnt work it i do not think that i can invest the time to do it again.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-02-2018, 01:15 PM   #12 (permalink)
EcoModding flying lizard
 
Daschicken's Avatar
 
Join Date: May 2012
Location: Georgia
Posts: 377

Cibbie - '88 Honda CBR 250R
Motorcycle
90 day: 49.63 mpg (US)

Rarity - '06 Honda Accord EX V6
Team Honda
90 day: 40.19 mpg (US)

Baby viff - '87 Honda VFR 400R
Motorcycle
90 day: 49.13 mpg (US)
Thanks: 286
Thanked 115 Times in 76 Posts
Quote:
Originally Posted by teoman View Post
Do you know the input parameters? I.e lengths and rpm ranges etc?

I am pretty handy sometimes

Could you snap a photo of your intake?

Is it just the intake length after the air filter?
My variable intake doesn't use another set of runners, rather it has a chamber connecting either sides of the runners with a flap in the middle that opens at 4000, or 4900 RPM(don't know for sure which one. On the J25 it opens AFTER VTEC. I think on my J30 it opens before VTEC.). I don't know if it has any variable rpm/throttle position logic. Either way, the first transition is quieter than the second, if that helps you figure it out.

Here is a drawing. You can see the firing order listed, so when cylinder 1 is charged, it sucks all the air coming in down into cylinder 1. Cylinder 1 fires and the next cylinder is cylinder 4. With the flap closed, the air has to reverse and go all the way back around the loop and into cylinder 4. With the flap open, the air has to reverse and can go through the center of the intake manifold, shortening the path.
Click image for larger version

Name:	IMG_0710.JPG
Views:	7
Size:	85.8 KB
ID:	23430

The older V6 accords did not have the variable intake manifold(the J30 didn't at least, don't know about C27), and here is what their intake manifolds look like.
Click image for larger version

Name:	2001_honda_accord_lx_v6_coupe-pic-9112143475712901360.jpeg
Views:	9
Size:	84.8 KB
ID:	23431

My generation looks like this.
Click image for larger version

Name:	03AccordV6Engine.jpg
Views:	11
Size:	27.0 KB
ID:	23432

This is what my manifold looks like on the inside.
Click image for larger version

Name:	image (9).jpg
Views:	7
Size:	55.3 KB
ID:	23433

Quote:
Originally Posted by ksa8907 View Post
I don't know for sure, but I am going to go out on a limb and say that with variable valve lift and cam phasing, variable intake length may not make a big difference anymore and not be cost effective.
Probably true, most likely won't make a big difference, but it should still make a difference. It would be nice if they would develop these parts and make it an option to have them, or you can get the el-cheapo engine. I know which one i'm picking.
__________________
-Kaze o tatakaimasen-

Add yourself to the Ecomodder user map! As of 11/30/16 there are only 50 people on it!

116(Includes repeats...grr...) People as of 2/8/2018! Keep it up!

http://ecomodder.com/forum/showthrea...rmap-8247.html


Best trip in v6: 50.4
Best tank in CBR: 58.9
Best tank in VFR: 49.6

Quote:
Originally Posted by Frank Lee View Post
~the Cat and I watched the Supper Bowls today... tomorrow we will watch the Super Bowels...


Last edited by Daschicken; 02-02-2018 at 02:55 PM..
  Reply With Quote
Old 02-02-2018, 03:04 PM   #13 (permalink)
Master EcoModder
 
Join Date: Jan 2012
Location: United States
Posts: 1,244

spyder2 - '00 Toyota MR2 Spyder
Thanks: 76
Thanked 203 Times in 151 Posts
Variable intake is primarily useful on NA engines, whereas the trend is to go turbo. But yea they can be very effective. The 911 GT3 and Lexus LFA engines are NA, non-switchable cam profile 9000+rpm, but they have pretty good low end torque thanks to 3 switchable intake runner lengths.
  Reply With Quote
Old 02-02-2018, 03:25 PM   #14 (permalink)
EcoModding flying lizard
 
Daschicken's Avatar
 
Join Date: May 2012
Location: Georgia
Posts: 377

Cibbie - '88 Honda CBR 250R
Motorcycle
90 day: 49.63 mpg (US)

Rarity - '06 Honda Accord EX V6
Team Honda
90 day: 40.19 mpg (US)

Baby viff - '87 Honda VFR 400R
Motorcycle
90 day: 49.13 mpg (US)
Thanks: 286
Thanked 115 Times in 76 Posts
Quote:
Originally Posted by serialk11r View Post
Variable intake is primarily useful on NA engines, whereas the trend is to go turbo. But yea they can be very effective. The 911 GT3 and Lexus LFA engines are NA, non-switchable cam profile 9000+rpm, but they have pretty good low end torque thanks to 3 switchable intake runner lengths.
I sure wish my CBR 250R had a variable intake... 17,000 RPM+, BIG headers, very oversquare, carburetors... It is not a recipe for good low or midrange torque. I still operate it at 3,000 RPM or below frequently though. It doesn't help that 45 mph in 6th gear puts it at 5,600 RPM(AFTER dropping 3 teeth on the rear sprocket), but I try.
__________________
-Kaze o tatakaimasen-

Add yourself to the Ecomodder user map! As of 11/30/16 there are only 50 people on it!

116(Includes repeats...grr...) People as of 2/8/2018! Keep it up!

http://ecomodder.com/forum/showthrea...rmap-8247.html


Best trip in v6: 50.4
Best tank in CBR: 58.9
Best tank in VFR: 49.6

Quote:
Originally Posted by Frank Lee View Post
~the Cat and I watched the Supper Bowls today... tomorrow we will watch the Super Bowels...

  Reply With Quote
Old 02-02-2018, 03:41 PM   #15 (permalink)
Master EcoModder
 
Join Date: Jan 2017
Location: Istanbul
Posts: 478
Thanks: 31
Thanked 45 Times in 34 Posts
Pre air filter length doesn’t count right.

I was thinking of doing the same with a hot air intake.
  Reply With Quote
Old 02-02-2018, 06:17 PM   #16 (permalink)
EcoModding flying lizard
 
Daschicken's Avatar
 
Join Date: May 2012
Location: Georgia
Posts: 377

Cibbie - '88 Honda CBR 250R
Motorcycle
90 day: 49.63 mpg (US)

Rarity - '06 Honda Accord EX V6
Team Honda
90 day: 40.19 mpg (US)

Baby viff - '87 Honda VFR 400R
Motorcycle
90 day: 49.13 mpg (US)
Thanks: 286
Thanked 115 Times in 76 Posts
Quote:
Originally Posted by teoman View Post
Pre air filter length doesn’t count right.

I was thinking of doing the same with a hot air intake.
I’m pretty sure it’s pre throttle body that you are thinking about, but even then I have heard about pre throttle body intake piping that can be important.
__________________
-Kaze o tatakaimasen-

Add yourself to the Ecomodder user map! As of 11/30/16 there are only 50 people on it!

116(Includes repeats...grr...) People as of 2/8/2018! Keep it up!

http://ecomodder.com/forum/showthrea...rmap-8247.html


Best trip in v6: 50.4
Best tank in CBR: 58.9
Best tank in VFR: 49.6

Quote:
Originally Posted by Frank Lee View Post
~the Cat and I watched the Supper Bowls today... tomorrow we will watch the Super Bowels...

  Reply With Quote
Old 02-02-2018, 06:53 PM   #17 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 10,471

CM400E - '81 Honda CM400E
90 day: 39.62 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
90 day: 41.56 mpg (US)
Thanks: 1,901
Thanked 2,065 Times in 1,268 Posts
Here is a Toyota version from a performance 4 cylinder (5E-FHE).







__________________
Current project: Heating the manual trans with engine coolant
  Reply With Quote
The Following User Says Thank You to Daox For This Useful Post:
Daschicken (02-08-2018)
Old 02-02-2018, 07:52 PM   #18 (permalink)
...beats walking...
 
Old Tele man's Avatar
 
Join Date: Jul 2009
Location: Tucson, AZ
Posts: 6,081
Thanks: 169
Thanked 1,421 Times in 1,054 Posts
Lengthwise...it's from atmosphere to intake valve (actually to mid-point inside cylinder between cylinder head and piston top).
__________________
• 2014 Toyota Prius 1.8L eCVT
• 2009 Pontiac Vibe 1.8L/SFI 4A
• 2004 Pontiac Vibe 1.8L/MFI 4A

• 2011 Chevrolet LTZ Cruze 1.4LT 6A
• 1971 Dodge Charger 318 3A
• 1970½ Plymouth AAR 'Cuda 340/6BBL 4M
• 1968 Dodge Charger 383 3A
• 1967 Plymouth Barracuda Formula S 383 4M
• 1965 Plymouth Barracuda Formula S 273 4M
  Reply With Quote
Old 02-03-2018, 12:52 AM   #19 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 839

Topoff (RIP) - '92 Geo Metro LSi
90 day: 48.54 mpg (US)

'91 Miata - '91 Mazda Miata
90 day: 27.11 mpg (US)

'86 Fiero GT - '86 Pontiac Fiero GT

Purple Penny Pincher - '95 Pontiac Firefly Base
90 day: 43.68 mpg (US)

Jett-Black - '01 Volkswagen Jetta
90 day: 39.32 mpg (US)

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)
Thanks: 38
Thanked 251 Times in 187 Posts
Quote:
Originally Posted by serialk11r View Post
Variable intake is primarily useful on NA engines, whereas the trend is to go turbo. But yea they can be very effective. The 911 GT3 and Lexus LFA engines are NA, non-switchable cam profile 9000+rpm, but they have pretty good low end torque thanks to 3 switchable intake runner lengths.
Ditto with the Mazda KL engine in one of my cars...very flat(read: maximum), very wide power band. Zoom-zoom!
__________________

  Reply With Quote
Old 02-03-2018, 01:10 PM   #20 (permalink)
ASV
weirdo
 
ASV's Avatar
 
Join Date: Oct 2008
Location: PHX AZ
Posts: 81
Thanks: 5
Thanked 9 Times in 8 Posts
that's a crazy complicated over weight system
I can think of three different ways to do that
with less part and weight

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com