Hey all,
Ive got a choice to make and I need to make sure that this cam will still work with my stock brake system, and make great power on my lunati 383 topped with competition afr 227s and kook longtubes, backed by a th400.
I currently ran the 234-242, 595 lift with 1.6 rockers
I wanted to step it up much more due to the amount of juice goin through her this year. Have the intent to run a 300 DP system.
CAM IS 248-254 AND 600-619 WITH A 1.6 , WHICH LSA WOULD BE BEST,Let me know your thoughts. Thanks Steve.

 

It's been said many times before, but it bears repeating:
Have a pro design a custom cam specifically for your engine/car/desires combination. However, if you have already decided on the lobes, and just want an LSA, your poll will give you lots of choices.

Crude analogy: Your doctor recommends a specific prescription drug for your illness without knowing all your symptoms and test results (like head flow, gear, stall, tires, street or strip only, etc.) but you take a poll from non-MDs to determine the dosage. Even better: you self-medicate.

Ask Rich (rkrause) his opinion on such a scenerio (either one...)

Sorry to be so nasty. If I just said "custom cam" there's a good chance you'd ignore it. Hey, it's free advice and worth every penny you paid for it!

Good luck,
Jon

 

[QUOTE=ATEBYASNAKE]Hey all,
Ive got a choice to make and I need to make sure that this cam will still work with my stock brake system, and make great power on my lunati 383 topped with competition afr 227s and kook longtubes, backed by a th400.
I currently ran the 234-242, 595 lift with 1.6 rockers
I wanted to step it up much more due to the amount of juice goin through her this year. Have the intent to run a 300 DP system.
CAM IS 248-254 AND 600-619 WITH A 1.6 , WHICH LSA WOULD BE BEST,Let me know your thoughts. Thanks Steve.[/QUOTE

A lawnmower will run 10's with enough juice. Why worry about the cam as trust me…. A 300 hit of nitrous w/o a progressive controller or dual stage will be a real handful.

If you drive on the street, forget the bigger cam and make up the difference with just tad larger jets. The cam you mention is right on the edge of drivability on the street. Maybe it will work…….. and maybe not. Just do the nitrous and not worrying about beating John Force.

You will gain more by getting your suspension/tire right.

 

Unless its a track only car, i would personally taylor the cam to NA power and the drivability you want. You are only going to be spraying (mostly at least) at the track. Allow the car to breath how it wants NA, and just top it with the juice. The n20 is going to make power no matter the cam, we are talking small HP differences from a n20 to a NA grind with the same shot of nitrous IMO.

 

Thanks for any and all help guys, I gave Cam Motions a call and they set me up with something that should work. Time will only tell.

 

You hit a nerve with that one! A little knowledge is a dangerous thing. It's become a truism that an "informed" patient will get better care than one who is ignorant. But - I know it's kind of non-PC to say so, one of the kinds of "dangerous" patients who we sometimes see are intelligent people who have done some research on their symptoms, usually on the Internet. They become vested in their own interpretation of what is going on. This almost always leads to unnecessary and irrelevant diagnostic testing. And at worst, not infrequently to delayed diagnosis or inappropriate treatment. Consumer advertising of prescription drugs has exacerbated this problem. This is not to say that listening to patients isn't important, even vital. But the ideal conversation is an open dialogue, not the patient trying to talk the doctor into something.

Advanced tech content: As Jon suggested, an expert in this stuff can model your engine on EA Pro or a similar program and give you a pretty good guess as to vacuum combining the simulation with experience. Without that, I will hazard a guess that the cam will probably not work your brakes without a vacuum can. OTOH, that doesn't sound much like a street car.

Rich