Air cleaners for HS2 carbs?

[Hap Waldrop]

Hap, how about a real close look at those standoffs for the heater return pipe.

I'll take two, just bill me. Where they come from??

Jack, are you talking about what I used to attach my heater return hose to the intake manifold on my MGB, if so, then it even simplier than you think. Alot of folks on line and hoses will use a loop calmp, that come in many materials, but the problem with a loop clamp is that should you need to take the hose/line out, then you need to take the loop clamp completely off as well, if they are bolt thru a sheetmetal panel then this just add to the amount of labor you need to do. My long time friend Fred Thomas anbd my self over many years have dreamed up way to cust down on labor in given job, loop clamps were always one of those items we wanted to get rid of. Jack all the line is clamped to is a small section of aluminum 1"x 1" angle, it has the mounting hole for the intake drilled in it, and well as hole for a zip tie to pass thru and attach to the line, it just another one of those " race car" deals on my street car. Here's a better angle, nothing fany, but just makes working on the car easier, and I'm alsways up for that

 

[drooartz]

I definitely want a set of those stacks!

 

[jlaird]

I see, I see a peice of alum angle in my future.


That Hap is a lovely way to solve that small problem. I think Donald would approve therefor Miss Agatha will love em.

 

[Pythias]

I'll take a pair just to look at and admire. I may even put 'em on.

 

[davester]

I'm torn between hap's air horns with K&Ns and the SU filters with UNI foam. The price is close to a wash. The SU ones sure are pretty (hap's are also pretty but hidden). It seems to me that the only downside is that the SUs have bolts that potentially disrupt the air flow. Would this result in a noticeable performance hit or is it just some imagined "purists" view? Is there any other downside to the SU/UNI setup or are they otherwise comparable? Hap's horns seem to be much deeper than the 10 mm horns on the SUs though I've read that long horns don't make much difference on a street setup. Any opinions on this?

 

[texas_bugeye]

Stacks really only make a measurable improvement in the upper RPM range and wide open throttle (WOT),

Take that with a grain of salt! Excert from a web site on SU.

So how long and what is the the result is there a relationship between the leghth and the RPM? dispacment, cam profile?
I"m sure there is.
Chime in I'm all ears.

 

[davelgee]

Hi all! I thought I would drop in and give you my take on filters/ air horns... (for those of you that don't know, I make the su-filters).

Velocity stacks, or air horns (when contained in a filter) do two things, they create a plenum, or area of calmer air within the filter. This is especially important with the SU side drafts as they are (usually) perpendicular to the air flow, which can cause a partial vacuum in the carb. throat or horn at speed. A partial vacuum also will make the effects of reversion worse. Reversion - in automotive terms - is when there is a reversal of air flow in the intake track. Valve overlap, intake track length (which the horns are all about) and RPM all vary the effects of these harmonic pulses. "Hot" engines with lots of overlap will benefit most from carefully designed air horns at a targeted RPM.
Stub type air horns help to re-capture mixture loss and still maintain drivability over a wide rpm range.
Vizard (sp?) treats this stuff in some detail in his books on BL and Chevy engine tuning.

Cheers!
Dave G.
https://su-filters.com

 

[TheMidget69]

I just installed a set of HS2's on my BE a couple of months ago and have been looking for a set of filters I found a pair of these and just ordered them a few days ago they come with a stub stack in them and washable two layer foam. I'll let you know how they work out when I get them and get them installed.

I just ordered a pair of these as well. Awesome!

 

[Hap Waldrop]

There's alot of different set ups out there, the ones I make and sell are all about tow things good flow and simple user friendly design, alot of the other set have more cosmetic appeal for those interested in that and many are. This all started with me doing what I and many others had on my race cars in SCCA racing for years, while its nota pretty as some of the other sets, it will apeal to folks with the smae mindset ans me and others. Bottom line none of this make a huge differen at lowe rpms, the shorter radius stack produce the most CFM, this is documented in Vizard as well, and thats why many of us over the years went this way with our racer, I liked it on the streetcar, because it made acessing my carbs so much easier.

 

[jlaird]

I am just a strange duck, I like the looks of both.

 

[jlaird]

Hay Dave. Glad you stoped by. Thought you might like to know I have received lots and lots of comments on your air filters. I think they set the engine compartment off nicely..

 

[davelgee]

Hi to you Jack! I am glad you are pleased with them, and proud to have been able to contribute in a small way to a cool project like Miss A.! She looks great!

Cheers!
Dave G.

 

[mccalebr]

Hi, Hap...I've been out of touch for a while!

Any update on the stacks?

Ray

 

[drooartz]

Good to see you back, Ray. Been wondering where you'd gone to.

Hap has the stacks in now -- I've got my set sitting on my work bench out in the garage.