im running a sinlge SU (1.5 inch) with a ramflow air filter...the foamy thing.
just wondering if a stub stack inside, would do anything or make much of a difference ??
anyone know of these or use them??
| ausmini https://www.ausmini.com/forums/ |
|
| Stub stacks https://www.ausmini.com/forums/viewtopic.php?f=2&t=12195 |
Page 1 of 1 |
| Author: | K-Bar [ Sat Oct 15, 2005 11:25 pm ] |
| Post subject: | Stub stacks |
im running a sinlge SU (1.5 inch) with a ramflow air filter...the foamy thing.
just wondering if a stub stack inside, would do anything or make much of a difference ?? anyone know of these or use them?? |
|
| Author: | poeee [ Sat Oct 15, 2005 11:55 pm ] |
| Post subject: | |
They do what they are suposed to do, but whether you would notice it, who knows. It isn't going to hurt, lets put it that way. |
|
| Author: | drmini in aust [ Sun Oct 16, 2005 7:08 am ] |
| Post subject: | |
Vizard goes to a lot of trouble regarding them, and yes I know they do work on Webers & Dellortos. But with SUs, I've been told whilst they improve airflow on the flowbench, they don't seem to add any measurable power on the engine dyno.. very strange. But anyhow, KC swears by them, & you can buy them off his new site. See http://www.gr8website2.com/calverst/shop.htm 
|
|
| Author: | K-Bar [ Sun Oct 16, 2005 10:21 am ] |
| Post subject: | |
interesting.. depending on price, and what we've seen, theres probably no point getting one. |
|
| Author: | Mick [ Sun Oct 16, 2005 4:06 pm ] |
| Post subject: | |
Got lucky recently, saw a pair of them for twin SU's coming to the end of their auction, they were on 30 dollars with no bids, so I got them. They extended the auction a couple of days cos no-one had bid on them, but I still won. Seem to be nicely made. Yet to fit and try them though.... |
|
| Author: | K-Bar [ Mon Oct 17, 2005 9:39 am ] |
| Post subject: | |
Keep me posted...lol
|
|
| Author: | fuzzy-hair-man [ Mon Oct 17, 2005 10:07 am ] |
| Post subject: | |
drmini in aust wrote: Vizard goes to a lot of trouble regarding them, and yes I know they do work on Webers & Dellortos.
But with SUs, I've been told whilst they improve airflow on the flowbench, they don't seem to add any measurable power on the engine dyno.. very strange. Doc do I remember something in Vizard's yellow book about radiusing the front side of the SU's piston to improve air flow? I am guessing but the air seems to have a pretty torturous route past the piston in a SU so I am guessing that this becomes the limiting factor. Stub stacks also help provide a better air signal to dellortoes and webers |
|
| Author: | drmini in aust [ Mon Oct 17, 2005 12:20 pm ] |
| Post subject: | |
Some of Vizard's musings, particularly the mods to SU's jet bridge area are suss... they have been shown to be a bad idea. I would limit mods to thinning the throttle shaft, and maybe put a radius entry on the carb if not running a stubstack or trumpet.
|
|
| Page 1 of 1 | All times are UTC + 10 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|