Quote:
Originally Posted by ijasond
........ I really just want it to have a more aggressive sound & idle, I'm not too concerned with high performance ........
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Calls for a highly subjective opinion. It's why I did not comment, the first time around.
Quote:
Originally Posted by ijasond
........ Mondello cam JM-22-25-10 ........
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Similar to my Isky 280 Mega. If I was looking for an “aggressive” idle, instead of a specific power output, I would have stepped up to the (12º more duration, .050" less lift) 292.
But then, everyone here will have different perceptions of “aggressive”.
Quote:
Originally Posted by ijasond
........ What exactly would the symptoms be if the cam were the wrong one? ........
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Engine would have noticeably less power than before the rebuild.
Quote:
Originally Posted by 59-59-59
Mondello is known to put their names on other parts ........
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Should be an Engle cam with a Mondello part number..
Quote:
Originally Posted by ijasond
........ I guess there is always the possibility that Mondello sent me the wrong one.
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Always a possibility with any vendor. It's why one must always check any/all parts, before installing them.
Quote:
Originally Posted by Rallye469
......... Like take the cam down to a machine shop and have them measure everything ........
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One of the “hidden benefits” of buying from the machine shop = The “checking” will be done on their dime.
Quote:
Originally Posted by Rallye469
......... 108 LSA is not what you were looking
for ........
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Not a 108.
The -10 after the JM-22-25 (108º) makes it JM-22-25-10 (110º). For his application/goal, it wouldn't make any difference.
Quote:
Originally Posted by Rallye469
......... IF you wanted just a hair above stock for an agressive idle ........
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He did not say anything about “a hair”. Black, brown, or blond.
Quote:
Originally Posted by Rallye469
......... What's stock lift in a 66 425? ........
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Nothing to do with the topic. Unlike duration/overlap, lift will not help him to reach his goal.
Quote:
Originally Posted by ijasond
........ I really just want it to have a more aggressive sound & idle, I'm not too concerned with high performance ........
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Assuming, a real time conversation with Mondello, I would think they understood his desire/goal, far better than anyone using this venue.
Quote:
Originally Posted by Rallye469
......... Your valve geometry may be on the ragged edge of misalignment ........
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.
Not even close. .584” was not ideal, but it was not a problem.
I believe someone else, on this board, has gone higher.
Quote:
Originally Posted by Rallye469
......... Your not going to be pulling as much vacuum as you were ........
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.
That is a given. I would bet that vacuum was discussed during that conversation with the Mondello tech.
Quote:
Originally Posted by Rallye469
......... That cam has the potential to run low 12's in a 425 ........
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At least.
Quote:
Originally Posted by Rallye469
......... I don't think it was the right choice ........
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As I recently found out, opinions are what discussion forums are all about.
Quote:
Originally Posted by Rallye469
.........And someone correct me if they disagree.
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And disagreements lead to discussions, which (in theory) lead to the dissemination of factual information.
Quote:
Originally Posted by ijasond
........ I pretty much relied on the information they gave me ........
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And that information was based on your input. All he/she did was choose (from the catalog) the profile that (in his/her opinion) fit your input.
Quote:
Originally Posted by ijasond
........ stock motor with the exception of adding dual exhaust & that I simply wanted to give it a more aggressive idle/sound ........
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That is exactly what you have. If it's not “aggressive” enough I have a, low mileage, JM-25-28 you can have, for the cost of shipping from 90012.
Quote:
Originally Posted by ijasond
........ Can I make it work? ........
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With a recurved distributor that matches your combination, it will work fine.
Quote:
Originally Posted by Rallye469
........ It just seems pretty big for what you originally stated you wanted ........
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He has not complained that the idle is too “aggressive”.
Quote:
Originally Posted by Oldsguy
He won't recommend one, remember?
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No need to. He already made his choice. I just dropped by to see who I can pizz off.
Quote:
Originally Posted by Warhead
........ You need ignition advance.
That needs to have 36-38 degrees advance (no more than that) by 3000 rpm ........
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What he said. ↑
Once you've found the optimum total, you can experiment with initial settings to find the “idle” you want.
Less advance = more radical idle = slower throttle response.
More advance = smoother idle = quicker throttle response.
Once you have both numbers, the advance “curve” needs to be modified, to meet (without the vacuum advance) your new requirements. Look for a “tune up” guy that has a Sun distributor machine.
Norm