Slant Six Forum
https://www.slantsix.org/forum/

I Believe Erson Screwed Up My Cam, Sent The Wrong One Or????
https://www.slantsix.org/forum/viewtopic.php?t=43343		 Page 1 of 3
Author:  speedy [ Sat Jan 22, 2011 2:39 pm ]
Post subject:  I Believe Erson Screwed Up My Cam, Sent The Wrong One Or????
Got the RV15/295 installed, working on checking specs. So far here's what I've got. Been checked and double checked...triple checked even...verified and nothing but frustration as my specs don't match the cam card specs......It seems I've got @.050 durations of an RV10/295 cam, yet my opening and closing timing specs of the RV15/295. Here's what I've measured:

Intake Duration @ .050" is 210
opens -2 btdc
closes 32 atdc
lift .287"

Exhaust Duration @ .050" is 212
opens 42
closes -9
lift .293"

Please, no need to ask who, what, where, when and why on tools I'm using, my experience degreeing, etc, etc :wink: ....

This has been installed straight up at this point. Can anyone confirm
"what we got here"?? I think it ain't what I ordered :roll:
Author:  emsvitil [ Sat Jan 22, 2011 3:30 pm ]
Post subject: 
Here are the specs:

RV10/295

RV15/295


I agree with you on the duration.

I'll need to reboot to access my Dyno2000 program to run the cam calculator.
Author:  emsvitil [ Sat Jan 22, 2011 3:50 pm ]
Post subject: 
Ok,

I get

Intake lift .4305
Exhaust lift .4395

Intake duration 210
Exhaust duration 213

Intake centerline 107
Lobe seperation 111.3


The RV10/295 specs agree with the dyno200 calculator
and
The RV15/295 specs agree with the dyno200 calculator


I'd say it's a RV10 intake lobe
MP244 exhaust lobe

ground on the standard Erson 254 lobe separation of 111 with 4 degrees of advance built in...

So it's a bastard step child that doesn't match anything............
Author:  speedy [ Sat Jan 22, 2011 4:21 pm ]
Post subject: 
Great, just what I was wanting when I ordered it!!! :roll: :evil: Welcome to the world of custom grinds for me I guess :cry:
Author:  DusterIdiot [ Sat Jan 22, 2011 4:27 pm ]
Post subject:  Try it and see...
Either way that cam and your proposed build should be ok, it'll have a smooth idle and a big fat torqueband...The 111 LSA might cause a bit more cylinder pressure due to the very short overlap event, so you will want to dial your distributor in to keep pinging down.

-D.Idiot
Author:  emsvitil [ Sat Jan 22, 2011 4:35 pm ]
Post subject: 
Talk to erson and either get the correct cam

or

if you think you can use the cam, get a huge rebate........
Author:  emsvitil [ Sat Jan 22, 2011 4:37 pm ]
Post subject: 
Thinking about it, erson may have changed the original exhaust lobe on the E254 to the Mopar lobe.

So it may be the current E254 (RV10), and not custom at all.
Author:  emsvitil [ Sat Jan 22, 2011 4:38 pm ]
Post subject: 
Just curious did they get the oil holes on the rear cam journal correctly drilled?
Author:  speedy [ Sat Jan 22, 2011 4:44 pm ]
Post subject: 
It's coming out and going back. I believe I'll be talking to someone at Erson on monday and see about getting what I ordered asap. Severely disappointed to say the least.
Author:  emsvitil [ Sat Jan 22, 2011 5:08 pm ]
Post subject: 
How would you go about bench testing the specs of a cam before installation?
Author:  speedy [ Sat Jan 22, 2011 5:12 pm ]
Post subject: 
Quote:
Thinking about it, erson may have changed the original exhaust lobe on the E254 to the Mopar lobe.

So it may be the current E254 (RV10), and not custom at all.
Could be the case, but the cam card shows specs for the RV15/295 grind, and the cam has those same grind#'s stamped on the rearend, yet it does'nt match most of the specs given.

Card shows:

RV 15M F212/295

LSA 110

intake opens -1
intake closes 39
duration @ .050" 218
lift .290"

exhaust opens 36
exhaust closes -4
duration @ .050" 212
lift .295"


My @.050" numbers vs. theirs are way off:

intake opens/closes off by 1/7 degrees
exhaust opens/closes off by 5/6 degrees

Also, regarding how I have it installed: retarding it 2-4 degrees (as recommended for my build by Doc) which would get it in the ballpark on one would just put it way off on the other, it's just the wrong grind.
Author:  emsvitil [ Sat Jan 22, 2011 5:20 pm ]
Post subject: 
Those card specs match the RV15/295 specs in the previously posted link without the 4 degrees of advance built in....

110 lobe center and 110 centerline vs 110 and 106.


Somebody screwed up............
Author:  Joshie225 [ Sat Jan 22, 2011 5:39 pm ]
Post subject: 
Is the end of the cam stamped with a grind or part number?
Author:  olafla [ Sat Jan 22, 2011 5:43 pm ]
Post subject: 
You should take a look at the text from Doc here.

Olaf.
Author:  emsvitil [ Sat Jan 22, 2011 5:54 pm ]
Post subject: 
Quote:
You should take a look at the text from Doc here.

Olaf.
Your link is about getting the correct exhaust lobe pattern.

In this case it seems the correct exhaust lobe pattern was used, but everything else is wrong............
Page 1 of 3 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/