|
Stellings & Hellig air filter horsepower numbers
Hi Guys
I just finished some dyno work on a friend's engine and can post some definitive numbers on the horsepower loss with the little chrome lids seen on so many Cobras. On dual quads, with K&N air filters, the Stellings are down an average of 8 to 11 horsepower verses no air filters. Torque numbers were hardly affected at all. These numbers are for a FE tunnel port @ 6000 rpm with horsepower in the 550's. --Mike |
Hey Mike,
Have you by chance tested an FE single-carb setup comparing one Stellings filter and Chrome lid compared to one 8" K&N filter and 8" K&N topflow lid? If I'm understanding your post above, you've tested the dual setup only so far - correct?. I'm curious to know what an FE single-carb setup would do in comparison. It would also be interesting to compare the smaller Stellings and 8" K&N to the 14" K&N filter and top. Thanks, Duane |
Ditto on the K&N Xtreme top lid test. Though it is my understanding that they are only offered in 9", 11" and 14" sizes.
|
Guys: I can answer part of that since my engine was on the stand in August of last year. Single carb - 427 ci - side oiler.
w/ H&S air assembly 523 hp w/ NO filter 543 hp w? K&N Dual quad oval a/f 534 hp The trq. was affected a little but I was quite surprised at how LITTLE the H&S filter robbed power!:confused: At only a 4% loss it pays to filter and have the classic look. IMHO |
Quote:
I plan on running that exact experiment in the next week or two, just need to find a day off without rain to take the car to the chassis dyno. I'll let you know what I find. |
I look forward to the results Chaplin!
Here is a thread with the specs on the K&N http://www.clubcobra.com/forums/show...ght=K%26N+flow Do a search on 'K&N flow'. Lots of information. I would think that the effect would be worse on a single carb motor because of the size of the carbs. I currently have one of the big 14" x 3" K&N air cleaners and a stub stack. All of it is coming off for a Stellings and a good ole turkey pan. Since I have tons of hood clearence I am going to stack two of them for every day use. This will flow as much as my carb does so I am not expecting much if any seat of the pants feel between the two. By the way the Xtreem lids do come in a 9" (nothing smaller) but I know a number of guys that use them on top of the stelling cleaner for daily use and clame there is a groove where the filter fits nicely into. Lid is about .8" larger in diameter than the filter. The Xtreem lid flows 100 CFM. Accordind to K&N. Rick |
Quote:
|
I had my car on a chassis dyno about six weeks ago and saw essentially no difference. I have a FE 427, dual quads with the S&H and K&N filters. In fact the no filter run was slightly lower in both horsepower and torque but I don't think the numbers were significantly different.
Jack Z. |
| All times are GMT -7. The time now is 12:20 PM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: