Was ITB size for 2270 motor Now Single plenum 2270 |
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Was ITB size for 2270 motor Now Single plenum 2270 |
cgnj |
Mar 15 2016, 03:41 PM
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#1
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Senior Member Group: Members Posts: 624 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
I have been running 45 dells on 2270 with 34mm vents. Not sure if it was the cam choice (163/86b0, but it was much easier to drive with than with the 38/39 vents.
I was going to gut my spare dells for this project, but I think they are worth more in the box. So, for street 2270 what size motorcycle from wich bike tb should I be looking at for a first build? Thanks in advance, Carlos |
cgnj |
Mar 27 2016, 08:19 PM
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#2
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Senior Member Group: Members Posts: 624 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
Progess to date.
Vanagon 2.1 plenum is a dead end I think. Volome is approximately 1600 cc. Also the throttle body is at one end so there are two favored and two disadvantataged runners. Although it comes with a 50mm tb, there doesn't seem to be enough rom for a 55-58 mm tb. So, I pulled my last 2.0 plenum out of the box. First advantage, tb is more centrally located, runners should be appear to be the same. Volume is approx 2350 cc min., (+- measurement losses). I wanted to avoid using a 2.0 plenum because I expect that i will need a MAF to since I am currently on a split durarion 163/86b cam. (plus it was the last one in the box). I'm married to 2.0 plenum now. Motor is on stand, I will do leakdown, plenum packed for trip to machine shop. Need to puzzle out the volvo tb. It pulls in the wrong direction. Prepped the runners for powder. Prepped headers for paint. Pulled out heat exchangers and triad. I am going to test this with headers and heat exchangers. At this point, Im going with 2.0 green injectors. I have them. I am looking for a 2270 MSQ file if someone can pm one to me great. I'm hoping to fire this up next weekend. |
McMark |
Apr 4 2016, 06:58 AM
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#3
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Also the throttle body is at one end so there are two favored and two disadvantataged runners. Not trying to change your mind, but I think this is wrong. Or rather, I think that the side inlet plenum has a huge advantage in smoother air flow. The 2.0 plenum forces the air directly into a wall/floor which means you have no velocity. The side inlet plenums allow air to smoothly enter the chamber. Just my armchair engineering at work. (IMG:style_emoticons/default/drunk.gif) |
Mark Henry |
Apr 4 2016, 07:54 AM
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#4
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Also the throttle body is at one end so there are two favored and two disadvantataged runners. Not trying to change your mind, but I think this is wrong. Or rather, I think that the side inlet plenum has a huge advantage in smoother air flow. The 2.0 plenum forces the air directly into a wall/floor which means you have no velocity. The side inlet plenums allow air to smoothly enter the chamber. Just my armchair engineering at work. (IMG:style_emoticons/default/drunk.gif) (IMG:style_emoticons/default/agree.gif) The D-jet intake would be ok to get thinks up and running quickly, but I'd still look at the SDS intake I linked to in my last post. That link is a subaru plenum so of course you would have to tweak the design. Note how it feeds direct across the runners and that the runner inlets are shaped like velocity stacks. Long known fact that the velocity stack shape increases airflow and thus power. If you have 2.0 914 heads you likely could mod D-jet runners and build a custom plenum. |
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