RV-8 Intake Ramps

WingnutWick · #1 11-22-2020, 05:14 PM

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

Foghorn · #2 11-22-2020, 05:46 PM

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.

Ron77 · #3 11-22-2020, 06:02 PM

I have a new pair that I’m not going to use. They are yours if you want them.

Ron B

WingnutWick · #4 11-22-2020, 11:35 PM

Absolutely! Sending PM

Quote:

Originally Posted by Ron77

I have a new pair that I’m not going to use. They are yours if you want them.

Ron B

WingnutWick · #5 11-22-2020, 11:41 PM

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

Quote:

Originally Posted by RV8JD

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

Roy Thoma · #6 11-23-2020, 06:39 AM

Look at posts from DanH regarding ramp location.

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

Regards,

pilotkms · #7 11-23-2020, 06:55 AM

I had the question back in 2015. Search this > Cowl Inlet Ramps - needed?. CHTs rarely hit 400

EXTAAFLY · #8 11-23-2020, 07:21 AM

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.

Brent · #9 11-24-2020, 05:34 PM

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.

WingnutWick · #10 11-26-2020, 08:35 PM

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 fiancés 6.

Cheers!

Charles

Quote:

Originally Posted by EXTAAFLY

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.