This is going to sound silly, but.....
Thread Starter
12 Second Club
Joined: Dec 2015
Posts: 294
Likes: 7
This is going to sound silly, but..... I have a tuning question that has been bothering me since my cam swap. I've had it tuned by Solomon and it is great and spot on for a performance tune, but I have a question. Its a cc503 (7-503-8, 224/230 duration .503/.510 with 1.5 rockers) and the choppy idle was more agressive before the tune. Why is that? It has a choppy idle as it sits but it doesn't sound like the videos on YouTube that have my same camshaft and a tune... Why did my choppy lope get milder after the tune?
Idle speed and type of exhaust will have alot to do with sound.
A baby cam with a low idle rpm and open exhaust can sound just as big as a donkey dick cam with a full exhaust and higher idle rpm.
A baby cam with a low idle rpm and open exhaust can sound just as big as a donkey dick cam with a full exhaust and higher idle rpm.
Thread Starter
12 Second Club
Joined: Dec 2015
Posts: 294
Likes: 7
I just have the basic 3" inlet/outlet cross flow muffler from flowmaster with the stock tips removed, and the idle set to 750ish. I do have a electric cutout that sounds great, but sometimes I want to run quiet for cruising but loud at stoplights lol. Also timing is set to pretty much stock, it was advanced but it removed the choppy lope so I had the timing set back near stock.
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
generally tuning for a aftermarket cam raises the idle RPM, among other parameters, so the car idles smoother and does not "surge" at idle.
starting the car with a cam with the stock tune with a lower idle around 650 rpm it will have more of a "chop" sound but beyond that the tune needs to be adjusted for different timing, fuel trims, etc to run optimally.
if you are more concerned about having a chop sound ask your tuner to lower the idle rpm...but you may sacrifice drive-ability and performance some.
starting the car with a cam with the stock tune with a lower idle around 650 rpm it will have more of a "chop" sound but beyond that the tune needs to be adjusted for different timing, fuel trims, etc to run optimally.
if you are more concerned about having a chop sound ask your tuner to lower the idle rpm...but you may sacrifice drive-ability and performance some.
Thread Starter
12 Second Club
Joined: Dec 2015
Posts: 294
Likes: 7
Is there a better muffler that will improve my choppy lope that I have now? like the SLP LM series or Magnaflow replacement mufflers? I've been looking for another muffler option anyway. I cant afford any Borla price range systems lol. It just seems like the Cross Flow Flowmaster hides the lope a bit IMO. would putting tips (stock location by the bumper) back on the car help instead of just having the exhaust exit under the car?
Trending Topics
Teching In
Joined: Nov 2014
Posts: 45
Likes: 0
Flow masters are restrict as f**k... Borla... I don't like them... they use half exhaust, half muffler sound... for that price I'd find a good muffler... Magna flow has a spit "T" design that's straight through... no restriction what so ever... hundred bucks for one... or Dynomax SS turbo muffler is nice... but a lil restrictive... not as much as flow master but has a nice seep throaty sound under throttle
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
Thread Starter
12 Second Club
Joined: Dec 2015
Posts: 294
Likes: 7
Another thing that I have noticed is the hard start... After the tune, I have to feather the throttle a bit then it will idle on its own or else it will just die until eventually it will run on its own. Also it smells rich while doing so. I literally have a new AC Delco fuel pump, fuel filter, and regulator also. Is this normal? I don't think it would be lol. It never done this before the cam swap. I have a datalog program if that would help...
Thread Starter
12 Second Club
Joined: Dec 2015
Posts: 294
Likes: 7
Another thing that I have noticed is the hard start... After the tune, I have to feather the throttle a bit then it will idle on its own or else it will just die until eventually it will run on its own. Also it smells rich while doing so. I literally have a new AC Delco fuel pump, fuel filter, and regulator also. Is this normal? I don't think it would be lol. It never done this before the cam swap. I have a datalog program if that would help...