And if you want stubstacks to go in there I make them to suit 1-1/4" and 1-1/2" SU, straight or offset as shown.
Straight ones are $50/pr, the offset ones $60/pr (more work).
Prices include post.
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| K&N Air Filter https://www.ausmini.com/forums/viewtopic.php?f=2&t=40735 |
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| Author: | kiwiinwgtn [ Thu Apr 03, 2008 8:17 pm ] |
| Post subject: | K&N Air Filter |
Hi I have a set of twin 1.5 Su carbs and need some air filters, Looking at K&N which are realtivley cheap and easy to post. The question is will they fit. I have located a set part number http://www.knfilters.com/search/product ... od=56-9320 they have an offset hole The manifold is a standard twin SU 1.25 alu modified to fit 1.5's Regards Kiwiinwgtn |
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| Author: | MINImal effort [ Thu Apr 03, 2008 8:45 pm ] |
| Post subject: | |
Quote: Manifold is a standard twin SU 1.25 alu modified to fit 1.5's
Yes - I have the same setup ready for the "historic rally mini" project... and a pair of 56-9320 - should fit with no problems. |
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| Author: | drmini in aust [ Thu Apr 03, 2008 9:09 pm ] |
| Post subject: | |
And if you want stubstacks to go in there I make them to suit 1-1/4" and 1-1/2" SU, straight or offset as shown.
Straight ones are $50/pr, the offset ones $60/pr (more work). Prices include post. |
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| Author: | Kennomini [ Thu Apr 03, 2008 9:16 pm ] |
| Post subject: | |
I've been looking for these filters for ages  now I have a part number we'll see if they can find one for me.
What's the benefit of the substack? and dose it go between the filter and the carb? |
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| Author: | drmini in aust [ Thu Apr 03, 2008 9:26 pm ] |
| Post subject: | |
Kennomini wrote: What's the benefit of the substack? and dose it go between the filter and the carb?
The stubstack goes inside the filter against the backplate, basically it puts a radius on the mouth of the carb. You can see up to 5% improved airflow according to Vizard. These also fit Ramflo filters. 
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| Author: | mason [ Fri Apr 04, 2008 6:29 am ] |
| Post subject: | |
They look nice doc |
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| Author: | LS1380 [ Fri Apr 04, 2008 8:10 am ] |
| Post subject: | |
K&N are expensive when you have to buy two.But are worth every dollar 
Will the subs fit 1 1/34? 
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| Author: | 1018cc [ Fri Apr 04, 2008 8:21 am ] |
| Post subject: | |
They are worth it IMHO. I run K&N filters with Kev's stubstacks for that bit of extra bling 
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| Author: | drmini in aust [ Fri Apr 04, 2008 10:02 am ] |
| Post subject: | |
I don't make them for HS6 or HIF44, with those it's easier to stick the carby in a lathe and machine a radius in it. 
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| Author: | kiwiinwgtn [ Fri Apr 04, 2008 5:18 pm ] |
| Post subject: | |
minimatt thanks for the info are you able to post a pic of your set up Doc I was also thinking of the stubs If i fit them later one will it effect my needle choice Cheers Kiwinwgtn |
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| Author: | drmini in aust [ Fri Apr 04, 2008 6:11 pm ] |
| Post subject: | |
kiwiinwgtn wrote: Doc
I was also thinking of the stubs If i fit them later one will it effect my needle choice Cheers Kiwinwgtn No, it made no real difference mixture wise to my wife's car, I'm still using #6 needles in it. But it's got better throttle response and more top end.
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| Author: | kiwiinwgtn [ Sun Apr 06, 2008 8:45 pm ] |
| Post subject: | |
Doc just been thinking and making up some card board templates to see if those K&N filter fit is why do not turn a radis on 1.5 inch carbs like you do the 1.75 inch |
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| Author: | drmini in aust [ Sun Apr 06, 2008 9:10 pm ] |
| Post subject: | |
Discussion- Well you could do that I guess, but I only have a small bench lathe... I would have to make tooling up to hold it-and after you put a radius in the carb mouth, you then have to cut the hole in the backplate bigger to clear the radius, etc etc...... I just let GR machine the 1-3/4 carbs.  `
OTOH, these HS2 and HS4 stubstacks are a development of the Weber & Dellorto ones I already make from 65mm alloy bar. Making HS6 or HIF44 ones I would need much bigger bar, and have lots of waste, so they would cost more. |
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| Author: | MINImal effort [ Sun Apr 06, 2008 10:23 pm ] |
| Post subject: | |
Here is my setup - as bought off eBay not yet overhauled... 
Filters backing put loosely in place (too cold to go and find bolts in the garage )
A close fit but do fit... otherwise when fitted will look similar to other pictures posted in the thread (though they are using maniflow manifold) |
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| Author: | clubmn [ Mon Apr 07, 2008 8:50 am ] |
| Post subject: | |
really nice looking set, don't look like they have done much work, But then a bit of spit shine goes alongway. |
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