Re: Reviews on Lunati 60103 cam please
HI BILLY,i got your not so suttlle point of dont bother me with the details i just want to know about the possible new cam i am asking about. But not what might really be the problem that could possibly avoid a cam change etc and correct the crappy idle issues that are the only issue you said was the reason for a cam change.
I was just trying to help since "you said he was only having a problem with the idle" and nothing else.
Thats why i tried to find out what timing he was running and made the suggestions i did because i find 5 of 7 times i hear complaints like poor idle with perf cam its the timing not right for the cam being run and also no vac adv or running the worng vac adv for cam being run.
And like you also stated there's no vac adv being run on his street motor with fairly lrg cam in small motor which is the wrong thing to do for a street motor with auto trans.
The vac adv will add plenty of timing at idle which really helps small motors with a farily lrg cam idle much better. Thats not to mention if the base timng is somewhat retartded like in his case likely being less then the 20 deg base timing that cam needs in his small motor just making it worse .
I bet the bank that if sommebody that knows how to propely dial in his setup worked on it it cranking in more base timing & installed a dist with vac adv for his street perf motor it would idle much better . Heck,just cranking in more base timing without the vac adv will still show you if more timing will help out in this situation. And if it does help and he's more happy with the idle you could then try a dist with vaqc adv thats properly setup andhe would be good to go.
That's where i was comming from trying to fix the 1 issue you posted as his problem to try to save your brother the cost and time of a cam change if the idle was the olny issue that he had that could very likely be fixed of at least significantly improved with proper tuning along with a vac adv dist.
Again,no vac adv on street & somewhat retarded base timing along with auto trans and fairly lrg cam in a small street motor always = crappy idle , crappy throttle responce & crappy low engine speed performance below the rpm where the total is fully in . That type poor perf is often blamed on the cam when many times it's simple setup /dial in issues that are the major problem .
Of course installing a much milder cam like your saying he is going to do will bandaid the idle isssues some due to it having less duration so the milder cam is not as sensitive to less base timing and no vac adv at idle.
But even that milder cam in that motor will not run up to its best perf potential without a proper timing curve and esp proper base timing & a vac adv on street for better throttle responce/increase fuel mileage/cooller running motor in traffic @ idle/& better idle in general,etc.
Trust me when i say that because i have been dialing in street perf sbc/bbc motors for 38yrs now and have plenty of exp doing it . Your brothers idle complaints are commom as dirt with the possible somewhat retarded base timing he's running and a dist with no vac adv on his street pref motor with auto trans .
I see Too many people here in tean chevelle that are running race dist's with no vac adv on the street having idle issues when its the wrong thing to do in most cases,not all ,but 8 of 10 it is on the street with perf cam,period. Not running enough base timing along with no vac adv just makes things much worse without the additional timing it provides at idle with a perf cam when it comes to a poor idle esp with auto trans/fairly lrg duration cam in small motor.
You would be surprised at how much better even that out dated design eddy perfromer cam would run with the proper base timing (min of 20 deg in this case/38 total) & a dist with proper vac adv for idle vacuum attached to full intake vacuum all the time to keep it fully activated at all times for stable timing at idle & of course a better more stable idle too.
Good luck with the new cam install .
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2006 YAMAHA 1700 ROADSTAR SILVERADO (1 owner ,GOT in 2009,4,700 miles/WK end fun)
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