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  #1  
Old 11-22-2020, 05:14 PM
WingnutWick's Avatar
WingnutWick WingnutWick is offline
 
Join Date: Jun 2013
Location: Lemoore
Posts: 207
Default RV-8 Intake Ramps

Another post (prepping for a lengthy annual to address a lot of issues).

My engine suffers from high CHT's - I have tried the washer fix, and redid my baffling as well. While that helped, I still can get my CHT's above 400 at below freezing temps. I think that one of the contributing factors is that my cowling doesn't have those ramps on the top of the intakes which I thinks leads to a lot of spillage as well as turbulent flow reducing effectiveness.

Are these ramps sold anywhere? If so I am looking for P/N and the process for attaching them.

Thank you!

WN
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  #2  
Old 11-22-2020, 05:46 PM
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Foghorn Foghorn is offline
 
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Default

Drawing 48, upper right hand corner of drawing. P/N: Cowl, 8 inlet left/right.

I didn't see them in the store so you'll probably have to call. I put mine in with clecos and then epoxied in place.
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  #3  
Old 11-22-2020, 06:02 PM
Ron77 Ron77 is offline
 
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Location: Kemah, Texas
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I have a new pair that Im not going to use. They are yours if you want them.

Ron B
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  #4  
Old 11-22-2020, 11:35 PM
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WingnutWick WingnutWick is offline
 
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Default Yes

Absolutely! Sending PM

Quote:
Originally Posted by Ron77 View Post
I have a new pair that Im not going to use. They are yours if you want them.

Ron B
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  #5  
Old 11-22-2020, 11:41 PM
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WingnutWick WingnutWick is offline
 
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Default

Thanks Carl for the images and help! I actually have them Im just on the road for a few weeks and not able to get to the plans.

Quote:
Originally Posted by RV8JD View Post
Inlet ducts. They appear to be these from the Van's Parts List.

https://shop.vansaircraft.com/public/parts.txt
COWL,8 INLET LEFT, INLET LEFT PRE PREG, $43.00

COWL,8 INLET RIGHT, INLET RIGHT PRE PREG, $43.00

From DWG 48:





You also need to purchase a set of RV-8/-8A plans/manual on a USB drive for $10 --> https://shop.vansaircraft.com/cgi-bi...oduct=fd_plans
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  #6  
Old 11-23-2020, 06:39 AM
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Roy Thoma Roy Thoma is offline
 
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Location: Hillsboro, OR
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Default Ramp location

Look at posts from DanH regarding ramp location.

https://vansairforce.net/community/s...5&postcount=11

Regards,
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N174RT (RV-7A) first flight 5/31/11, 1780hrs as of August 2020:
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Our other riveted aluminum monocoque RV is a 2012 25' Eddie Bauer Airstream

Past aluminum monocoque vehicles:
N601RT (CH601HDS) First flight 5/03, 1550hrs after flying 8 years: 912ULS, GNS430W, SL-30, D10A Sold
1995 Midnight Pearl NSX w/BBSC Sold

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  #7  
Old 11-23-2020, 06:55 AM
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pilotkms pilotkms is offline
 
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I had the question back in 2015. Search this > Cowl Inlet Ramps - needed?. CHTs rarely hit 400
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  #8  
Old 11-23-2020, 07:21 AM
EXTAAFLY EXTAAFLY is offline
 
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You should drop by KVIS sometime. If you're interested, I am doing a new baffle kit right now. Airplane is going in for all new fiberglass work in January, including a new cowl and I just finished completely re-wiring the entire airplane, AND an extensive annual. Lots of improvement this year, not much aviating. Shoot me a PM, I am in the hangar every day until the 8th of December.
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  #9  
Old 11-24-2020, 05:34 PM
Brent Brent is offline
 
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Location: Hanover, Pa
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Default Inlet ramps

I have just started flying my RV8. So far the CHT temps appear to be well within limits. I manufactured my inlet ramps by using blue foam with an epoxy skin. I took great care when sealing the baffles and the engine area in general. All very smooth with no sharp corners to trip the airflow.
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  #10  
Old 11-26-2020, 08:35 PM
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WingnutWick WingnutWick is offline
 
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Default

Jason,

I'll definitely swing by and see what you have going on. Curious about your baffle kit. I'm hoping these ramps solve some of my problems. In Hawaii for a few weeks but I'll let you know when I'm back in town. I've got a hangar in HJO but keeping the 8 in FCH with my fiancs 6.

Cheers!

Charles

Quote:
Originally Posted by EXTAAFLY View Post
You should drop by KVIS sometime. If you're interested, I am doing a new baffle kit right now. Airplane is going in for all new fiberglass work in January, including a new cowl and I just finished completely re-wiring the entire airplane, AND an extensive annual. Lots of improvement this year, not much aviating. Shoot me a PM, I am in the hangar every day until the 8th of December.
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