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Trumpets/Ram Pipes/Velocity Stacks
Topic Started: Jan 7 2008, 09:52 AM (3,120 Views)
AceSniper
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Global Moderator

leave plenum as it is unless your going to turbo it.... Id loose power if I ran a "shiny" plenum with no volume... would kill topend really bad. Depends what rpm band you want to improve...
Edited by AceSniper, Oct 29 2009, 12:02 AM.
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joyce
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Levin-it-up
AceSniper
Oct 28 2009, 11:52 PM
leave plenum as it is unless your going to turbo it.... Id loose power if I ran a "shiny" plenum with no volume... would kill topend really bad. Depends what rpm band you want to improve...
x2 ace

The science behind the plenum is more complicated than we can imagine!
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n2o
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mechanical n00b
if anyone is interested in getting a set of i.mec trumpets get in quick

http://cgi.ebay.com/ebaymotors/Pass-Racing-Air-Funnel-for-AE111-Velocity-stack_W0QQcmdZViewItemQQhashZitem56373a7669QQitemZ370293765737QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
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JDM
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AE111
mine are on the way ;)
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Bryan BZ-R
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Stage 6
peoples views who have them any good? Much of an inprovement in power?
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The Parrot


i found once the ecu had adjusted itself it was a nice gain and throttle response very good increase.
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Bryan BZ-R
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Stage 6
good ta here yea im getting them off jp :cheers:
Edited by Bryan BZ-R, Aug 10 2010, 04:30 PM.
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Levin BZR
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The Parrot
Aug 10 2010, 04:24 PM
i found once the ecu had adjusted itself it was a nice gain and throttle response very good increase.
+1

Excellent modification!
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kaivaksdal
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Stage 3
Hi all,
I run short ram trumpets but with individual filters on each.
http://s1046.photobucket.com/albums/b470/kaivaksdal/Road%20wheels%20and%20trumpet%20filters/
Running them open is not a good idea, as even on track you do suck in sh1t... Also, you must get lots of nice, cold air to them to be effective.
Including a race exhaust system (solid fabs) this gives a reliable 140bhp at the wheels and doesn't seem to affect power delivery - then again, this is a track car and doesn't need much torque below 5,000rpm.
Kai MccLevin
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touge_trueno
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Stage 5
going off topic a bit but has anybody heard of TWM trumpets?

getting some off the same guy who got BZR4AGE his IMEC trumpets but these TWM trumpets are supposed to be the bee's knee's and much better than the IMEC ones. plus much more expensive!! they are spun alloy opposed to rubber

just wondering if someone has heard of them before?
Posted Image

they sure do look like sex on this alfa engine.
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kaivaksdal
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Stage 3
I haven't heard of them, but they look nice. However, if they are more expensive just because they are metal and not plastic, then it's up to you to spend the money...
I can't see how they can be fundamentally better than imec ones though.... as long as the in take path is right and smooth, does it matter metal or plastic?
Up to you

Kai McLevin
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touge_trueno
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Stage 5
yeah true but it also comes down to availability. if i could buy IMEC ones off the shelf here in NZ then i would. but these came in from the states. from the look of them they are supposed to be really awesome for carb setups. -which probably means they will be awesome as the airflow would be a lot more of a delicate subject in a carbed engine.

in terms of alloy vs rubber. alloy will give a better sound due to resonance. ^o) will be getting them fairly cheap though as have bought about 4grand worth of stuff off the guy so far. B)
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paul levin
Stage 1
ive just put open trumpets on my bzg levin. there are two breathe pipes running to the airbox, what did everyone do with these when removing their airboxes? cheers, paul
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touge_trueno
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Stage 5
don't run them open.

the trumpets need fresh cold air and removing plenum doesn't do much for it. as for if you will get any gains, who knows depends if you have decent extractors and exhaust to free the engine up.

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supernova-dw


@ Touge_Trueno how are those TWM Velocity stacks you said about ? Have you got them fitted now ? What length are they ?
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touge_trueno
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Stage 5
haha funny you should mention that.
Posted Image

blue line is std trumpets, red line is 40mm TWM trumpets with full radius lip and tapered as well.

i am going to get it re-tested once i have a decent set of extractors which will hopefully get it to free up in the upper rev range a bit and make use of the extra air being sucked into the engine. still running completely std extractors atm.

those dyno runs were back to back and both were with airbox fitted and plenum on.
Edited by touge_trueno, Nov 9 2010, 03:48 AM.
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Sam_Q
Sam_Q
ANyone got any idea why those TWM trumpets are 2 piece? I don't see the advantage?


I am unsure if I should be posting here so if it's not appropriate could an admin please delete this post and let me know?

I can offer these:

Posted Image
Posted Image
Posted Image

for blacktop I can offer lengths of 20, 50, 60, 70, 110, 150 and 220mm

ideal flow and fitment

I can give people more information if their interested
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keelan 1.6
Stage 2
when you say you can offer these do you mean you can sell them??
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DreadAngel
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Han Lue
Yes, Sam sells them from his own firm I believe =)

Check his website...
Edited by DreadAngel, Jan 20 2012, 05:01 AM.
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viper33
Stage 4
So for anyone running open trumpets, what did you do with 2 the vaccuum hoses that run off the plenum or the bottom plate of it anyway?
I can see one going to the steering rack and i think its something to do with making it easier to steer at slow speeds or something?
Couldn't really follow the other one around but im guessing its for the ISCV or something?
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Sam_Q
Sam_Q
keelan 1.6
Jan 20 2012, 03:58 AM
when you say you can offer these do you mean you can sell them??
Sorry I missed this one, yes my company sells a widest range of blacktop stacks anywhere- 20 to 150mm long.
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