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Old 06-22-2021, 01:15 AM
MalteJ MalteJ is offline
Join Date: Jul 2018
Location: Munich, Germany
Posts: 11
Default Thunderbolt vs. Standard IO-390

Hey guys,

I am looking for some detail pictures that show the differences between the Thunderbolt IO-390-EXP119 and the standard Lycoming YIO-390-A3B6.
The different air intake, fuel system etc.
Also I would like to know how does the RV-14's lower cowling differ between both versions?

Do you have some pictures?

Thanks a lot!

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Old 06-22-2021, 06:15 AM
DanH's Avatar
DanH DanH is online now
Join Date: Oct 2005
Location: 08A
Posts: 10,280

The new cowl's air exits are the two fairings around the tailpipes, and a variable area door in a cover over what was formerly an open tunnel.

The intake changes are a revised fiberglass snorkel, an AFP FM200 injection, and the 390 C/D model's intake manifold, which has a larger inlet bore compared to the traditional integral plenum sump.
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Dan Horton
Barrett IO-390
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Old 06-22-2021, 04:50 PM
RV7ForMe RV7ForMe is offline
Join Date: Jul 2015
Location: Europe
Posts: 646

Originally Posted by MalteJ View Post
Hey guys,

Thunderbolt IO-390-EXP119 and the standard Lycoming YIO-390-A3B6.

Not sure it matters, but you can also get the new EXP119 in the NON Thunderbolt version (standard Lycoming). My buddy has it in the 14a.

There are quite a few changes. The Oil cooler is a bit changed. The Air intake is redesigned and also the the throttle body is now from Air Flow Performance. It's the gold looking thing on Dans picture.

The exhaust is different, hence the bottom cowl must be because of the new exhaust pipes.
The RV14a now has a cowl flap in the tunnel where the original exhaust was...

Based on the performance numbers. The difference is Huge!
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Last edited by RV7ForMe : 06-22-2021 at 04:56 PM.
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