I don't know what the RDP stands for but I'm pretty sure the same exhaust lobe is used on the RDP15 as well, with the bigger intake lobe the cam is indeed longer on the intake compared to the exhaust,but the RDP10 is a different scenario with the smaller intake lobe.

Reverse Dual Pattern...

Typical V-8 mentality has a large exhaust lobe in duration so the headers/extractors can have more scavenging time during the overlap event or a normal dual pattern cam (i.e 260/268 duration)... The slant six has a fairly efficient exhaust event, but getting the cylinder filled with the ports we are given is not so great... so we prefer the RDP style of cam that has more duration on the intake side to give a bit more time for the naturally aspirated motor to get more into the cylinder (hence the popularity on the higher compression engines for the 280/270 Erson cam).

FYI.

RDP does indeed mean Reverse Dual Pattern.

Factory Slant-6 camshafts:

'60-'65 170, '60-'64 225: 232° intake, 228° exhaust.
'66-'69 170, '65-'70 225, '70 198: 241° intake, 236° exhaust
'67-up with 2bbl (export), '71-'80 all: 244° intake, 244° exhaust
'60-'61 Hyper Pak: 276° intake, 268° exhaust
'81-up all: 228° intake, 228° exhaust.

So a cam that has more exhaust duration than intake duration is a dual-pattern cam (intake and exhaust aren't the same) and the reverse of the factory dual-pattern cams. Is this the "right" way to do it? No, but it's not the wrong way, either, and this cam runs very well.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I had my cam reground to their grind #2106 this February along with my lifters resurfaced. Cam card shows valve clearance at .015 both int. & exh.
They did a very nice job. This is for my 198 build project.

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Ski boot laces can get your slant six home.

I have received my RV10-RDP reground from Oregon Cam. Since I live in Sweden and it's expensive to ship I bought a cam core from Oregon Cam instead. $75 for the grind, $30 for the core and new lifters cost $4.50 each. The only bad thing was the shipping from Oregon to Sweden cost as much as the grind,core and 12 lifters. But I'm happy anyway and cant wait to run it

I dealt with Ken and I'm very pleased with the customer service they have.

Wondering how well this cam will work in our 1980 Volare 225 /6 rebuild?

Need to keep the emissions stuff and possibly the stock single barrel carb until we find a super 6 setup....hoping the machine shop will be abel to bump the compression a little through the usual means...

I did reach out to Oregon Cam and am waiting for their suggestions as well....

Very well indeed.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

So I shouldn't go with the "RV15"?

Correct. Use the RV10-RDP.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.