OK. So today I hooked knock sensor back up. Switched lt1 knock module with lt4 knock module. Mass air flow connector was resting against the coil wire so I moved it. Don't have any times yet. But car seems to be idling better and running better. Not sure if that would have effected my Maf or not. Anyone know?

 

I need to find where you guys are dynoing these cars. Cause if your pulling 350 to the wheels with a hot cam, I must be pulling 400

 

Why because you ordered a cam from the bottom of the page?

The 306 is just big, not that great and stock heads will choke it from seeing it's full potential.

 

ya so when i upgrade the heads i have 400+ plus to the wheels, it actually makes since in the end. speaking of bottom of the page I haven't seen a hot cam car that can even remotely hang with a 306 car sooo...........

 

Then you just are selective in what you see.
Most of the fastest stock shortblock cars use cams with less duration than the 306

 

Because most people are afraid of spinning the cars to the proper rpm to get the power. The cam may be old but it is still one of the best around. search the threads and you will find that out. Have you ever used the 306? I had a hotcam in my first Z28 and its not even comparable.

 

The term "proper RPM" is reserved for the cam itself but with stock heads that's limited. There are much better grinds than the 306 on stock heads. It's just a poor choice.

 

Joe, the guy with the mediocre dyno numbers only listed would have to know more than the guys with "faster than they should be" ETs listed.

I haven't made the mistake of purchasing a 306 cam but I have gotten my hands dirty helping at least one guy who did. He liked my ZZ4 cammed Caprice better than his own Camaro, when we lined up at the track I finished with the nose of my car about at his door. My car was mild enough it could be mistaken for stock, his was lumpy enough the manners eventually made him lose interest in the car.

Picking the biggest shelf cam you can find is about the oldest and most enduring mistake in hotrodding.
Duration wise the 306 is more appropriate for a stroker than a stock shortblock car.

 

your so cool......... I havent had a chance to take it to the track and ill make sure to let ya know when i do. Those mediocre dyno number are real and not made up bull **** as well. If I wanted the biggest cam i could get, i would of got the 847, by the way. I dont plan on having stock heads much longer just didn't have the funds at the time.

 

OK boys and girls, knock of the bickering.

 

Well extracting power out of a limited head means adding more duration and turning it higher rpm... more gear/more stall but they do run hard when setup right.

I see nothing wrong with a big cam on stock heads if your looking to get the most out of stock heads with a cam only swap. Look at the ls1 cam only list.... there are no small cams there and most say they are too big for stock cubes/stock heads.

Its all in your intended use of the motor. If a guy wants to run stock heads with big cam to hit a goal, how does that make it any more wrong or right compared to a smaller cam car with some head work running same times? yeah there may be some custom grind setups that will work abit better than the 306 in making power and torque across a given rpm band, but for what it is, its a heck of a shelf grind.

 

Ugh...not this crap again. Seriously?

I have seen far too often a many failed build because someone thought it would be a good idea to run a huge cam on stock heads and it simply doesn't work as well as a cam that provides power in a usable RPM range.

I'm one of them. Ran an XE 236/242 on stock heads against my builder's AND tuner's advice. I should have listened to them. Thing had no grunt down low and fell on it's face at 6300RPM. I suppose if you wanted a motor that behaved that way then this is a good combo.

 

Read what I said, it depends on the application. If you are trying to extract alot of power out of a limited head, the bigger cams are the way to go but NEED more stall and alot more gear to run right. I did not say it will be a street cam that will putt around on 2200 stall and 3.08 gears.... People who failed builds because of big cam probably didnt have the setup correct every where else.

A more street setup with broader power curve will be a smaller cam. I think the lower 220's deg durations are the best choice for stock heads. Still run very hard.

Again, all depends on application but to make a blanket statement that big cams and stockish heads dont work is incorrect. Also not just any big cam, but one matched to the heads and the wide split on the 306 fits the heads well, it will hold power well beyond the limit of the head port. Cam can be big and wrong just the same as a cam can be small and wrong for the application

 

joe- im sure your knowledge on Lt1s is immense and you know what you are talking about but I cant see how every exact car runs the same though. I love the way my car runs and its strong as hell maybe not like your guys setups but for me its exactly what i want. Try and keep an open mind that not every one on this planet is after the most powerful, insane car on the street because in all honesty someone has something faster. Im only 22 years old and for this car being the first one that i have actually put together i am more than pleased. It pulls very hard, i know that it needs better flowing heads but being in college its hard to work enough to keep a constant good flow of money. I never meant to affend anyone with my original comment, it was more of a joke that was taken offensively for some reason. I owned a hotcam car and it never put down more than 315 to the wheels in fact I have never personally seen one put down more than 330 to the wheels. It may run smoother but racing wise hot cams dont hold any chance against the 306. Im guessing something went wrong in your build or you were just expecting more, Im not really sure. Please dont take this wrong as i know that most of the people on this board know way more than me about these cars and Im always wanting to learn more but I can tell you from personal expierence that there is no comparrison with these cams, my setup now would have destroyed my old hotcammed z.

 

My friend had a 383 with cc306 m6 4.10 gears. I have a 355 with hotcam m6 4.11 gears both had tunes from pcmforless. My buddy still salty cause my 355 flat out performs his car!