C90-8

[tawadc95]

Can anyone tell me about C90-8's ?
Are they the same bolt pattern to the engine mount as a C65 and less weight as I have heard ?
Availability ?

[Dano"T"]

Re: C90-8

Same bolt pattern....she'll bolt right on the short mount or the long. I have a C-90-12F in one of my planes.

[tawadc95]

Re: C90-8

Hi Dan,
You like the engine?
My L2 is a C65-3 would it require a myriad of paperwork and approvals to make a switch like that and what do you get for fuel burn on yours?
I would like the increased climb rate but my engine noe goes the whole 25 hours without adding any oil and burns 3.5 gph so it is sweet and the new climb rate would have to be worth it.
What is your climb rate? I know we have different birds but should be close enough to give me an idea,I think ?
Thanks, Chris

[astjp2]

Re: C90-8

The C90-8 is about 5 lbs heavier than the 65, you need to see if it was machined for conical mounts or lord style mounts. If it is machined for lord mounts, it moves the engine foreward about 5/8" and makes the left front baffle hit the nose bowl. Its a great engine in a T-craft, It should climb about 700-1000 fpm at 1200 gross on a cold day. I have one that is an O-200 converted to a -8 and using a sensenich M74CK propeller repitched to 43. What a hoot! Good Luck Tim

[tawadc95]

Re: C90-8

sounds interesting,I like that kind of climb rate number!
was it easier to convert an 0 200 than locate a -8 ?
thanks, Chris

[Dick Huish]

Re: C90-8

I built a mount that was 7/8" shorter so the O-200 would fit and I got a field approval to put a C90-8 in an L-2M. We have done a number of C85's in L-2's. I think the 85 is the best option when you look at fuel burn and cost. I did have a customer that used an 85 with the O200 conversion. Dick

[Dano"T"]

Re: C90-8

The climb rate is quite impressive...i have a Sensenich 76AK-2-40 seaplane prop...and the plane has an EW of 800lbs. I don't have a vsi and it has a crappy non-sensitive altimeter.....so I don't have a climb rate # for you....It impressed a friend of mine with a 90HP Supercub though....we takeoff side by side....climb out side by side...he has a 76AK-2-40 re-pitched to 38......then we level off....and then I wait for him to arrive at our destination .....Sometimes I circle back and pass him again....he hates that! I get 103MPH cruise @2400 rpms. Burns about 5 to 5.5 gals/Hr

[astjp2]

Re: C90-8

If you want to convert to a -8, you need to replace the studs and redrill the back of the case for the new locations. You also have to plug an oil hole in the case. Don's dream machine does this on his STC. I got my engine in trade for an annual that I did on a 182. Tim

[tawadc95]

Re: C90-8

Thanks for the info guys,it sounds like an exciting addition!
Chris

[barnstmr]

Re: C90-8

We just received last week a one-time STC for installation of a C85-12 in an L-2A. The FAA is agreeable to help us with the multiple STC to do the same. I am working to include the A75, C85, C90, and O-200 for L-2, L-2A, L-2B, & L-2M using the original engine mount. It looks favorable to get this done within the next couple of months. This has come with the assistance of some good guys here on the forum. Will keep you informed.

[Ron Greene]

Re: C90-8

Terry,

That is great news.

Thanks,

Ron Greene

[tawadc95]

Re: C90-8

that sounds really great Terry!

[tawadc95]

Re: C90-8

that sounds really great Terry!
I will be looking forward to further news from you .
Chris

[Ragwing nut]

Re: C90-8

What exhaust system did you use?

Mike

[barnstmr]

Re: C90-8

Retain the existing exhaust/cowl/mount/starter (or lightweight B&C starter). No generator - requires existing wind generator or other FAA approved power supply system.