ClassE 1989 325IS Build Thread
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I'm LOVING that intake mani above!!!
I wonder what the power band would feel like to run a intake mani like that NA, with the intention if running boost in the future? I'm assuming a slight lose of low end torque, but possibly a slight gain at higher end (depending on runner length and size). I'd want internal full bell radius stacks integrated into design....
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I'm LOVING that intake mani above!!!
I wonder what the power band would feel like to run a intake mani like that NA, with the intention if running boost in the future? I'm assuming a slight lose of low end torque, but possibly a slight gain at higher end (depending on runner length and size). I'd want internal full bell radius stacks integrated into design....
Very easy to do with m20! Especially if you aren't incorporating itbs. But I bet you 50$ that intake manifold won't flow better than stock NA.
sk8 or die
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Very easy to do with m20! Especially if you aren't incorporating itbs. But I bet you 50$ that intake manifold won't flow better than stock NA.
Stock NA? You're probably right. With some standard bolt-ons tho (cam, chip tuning, bigger injectors, etc...) I wouldn't be as confident.
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A log manifold will have much nicer acoustics/induction sound than the stock M20 manifold. I would do a custom log manifold before ITBs, you will still gain awesome sounds, especially when running MS with a map sensor.
So you believe ITB's with boost wouldn't be really worth it? I could build a regular manifold this weekend... hmmm.
sk8 or die
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I can swing buying the materials and labor for a good log mani in fall - I don't think ITB's and everything to do it "right" are my budget for this fall.
Here's what I would like to see:
-Tapered plenum that clears stock brake booster
-Velocity stacks (preferrably full bell radius that protrude "into" the plenum - but brake booster clearance could be an issue)
The main issue I see is the brake booster - clearing it restricts the runner lengths.
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http://www.massivebrakes.com/brake-systems.php?p=brake-booster-delete
I should do this..
sk8 or die
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Velocity stacks are always beneficial.
Instead of removing the brake booster, I would probably opt for runners that are angled forward so that the runners and plenum clear it just fine.
Im thinking buy some aluminum 130 degree mandrel bends and do a bundle of snakes like the M5, though all the snakes would be pointed towards the back of the drivers side headlight instead of all over the place. This would not only help with the clearance issue, but it would also allow you longer runners to keep the mid-range happy
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http://www.massivebrakes.com/brake-systems.php?p=brake-booster-delete
I'll have to read up on this more tonight - but that's a nice solution!
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He means a runner angle like this:
Which would work best for NA if you can clear the booster (or delete it). Longer runners will give more torque in lower RPMs.
I love this idea - I'm not sure it's a "whack it up and weld" kinda job - but I don't know your fab skills either. Regardless - if I stay M20 this is most likely course of action in fall!
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If you keep the M20 carbs would be a unique look. http://www.performanceforums.com/forums/showthread.php?67286940-NA-M20-with-TK-goodness
If you're going for big power go 24v.
Sent from my SCH-I535 using Tapatalk
@DrLeadFoot
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If you keep the M20 carbs would be a unique look. http://www.performanceforums.com/forums/showthread.php?67286940-NA-M20-with-TK-goodness
If you're going for big power go 24v.
Sent from my SCH-I535 using Tapatalk
Mention of ditching EFI for carbs and ditching M20 for 24v
all in one post.
I cant handle this.
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