allthrotle

iTrader: (2)

Im running an ms3 cam, and I do plan on going boosted, I was wondering if I could keep the cam since its already in and just throw about 6-10 psi at my motor.

SuperZ

iTrader: (2)

No.The stock cam would even do better with boost that the MS3

sprayjunkie

I would have to say yes, keep it.
A friend recently added a Procharger to his Trak cam/Afr 205 combo, and even installed a two piece timing cover as he was pretty sure we would not be happy with the results. Well, 580rwhp later and running out of injector at 6500rpm with only 7psi, we decided that the 'big cam no good for boost theory' may have more to it...

Give it a shot, and let us know how it works out.

ninetres

iTrader: (35)

There is a never ending debate about the effect of overlap on boosted cars.

edwardswb

iTrader: (6)

i don't know about an MS3, but I know of a certain 2000 SS that's running low psi on stock 853 heads, ls1 intake, .612/.615ish 112+4 lsa. Makin nearly 500 rwhp at 5800 rpms (ran out of fuel) with very little tuning. Go for it and see what happens man.

allthrotle

iTrader: (2)

If these guys are running out of injector, then what size are they maxing them out on? Ive got a set of 42lbs in it now.

52172

iTrader: (2)

probibly 42's since they will max out around 550 rwhp give or take.

sprayjunkie

My buddies Vette is maxing out the 42#ers at 6500rpm at 580 rwhp...they were at 95% duty cycle at that power level.

SuperZ

iTrader: (2)

My friend gained 3 psi going from this cam to a 224-224 and much better driveability.

allthrotle

iTrader: (2)

Damn looks like I need some 60lb injectors then.

52172

iTrader: (2)

those will take you all the way up to 850 rwhp.

rufretic

iTrader: (37)

What are the specs on that cam? Mines 232/234 .598/.598 112lsa and I'd say it did pretty well(check sig). If I remember right the ms3 is just a touch bigger, I say try it out and yes, get 60lb injectors.

linn.35

The MS3 is 237/242 .603/.609 112LSA. the only thing im worried about is the LSA

99WS7

iTrader: (13)

MS3 is 237/242 603/609, allthrotle what is your LSA. Id say the higher LSA you went with the better off you would be. I too am running a MS3 and was curious about this as I may go FI in the future. I say go for it. Just curious what heads do you plan to run?

engineermike

Yea I think that crap has been disproven many times.

Got Me SOM

iTrader: (2)

I agree cause if you look at the cams that the buick guys run there lsa's are low.

but i dont think you want such a high duration cause your power band is going to be shifted way up high and all your usable street power will suffer.

i would go with something with a smaller duration

engineermike

I found a good example showing that big cams + boost = big power.

https://ls1tech.com/forums/forced-induction/678711-my-04-gto-76mm-set-up.html

Stock bottom-end, heads & cam (232/234-112), single T76, 650 rwhp at only 6 psi boost. If he swapped out the cam for a smaller one, I doubt he'd gain power. . .

Mike

HAMRHEAD

iTrader: (8)

I would say no, go get a custom grind for your specific setup. It doesn't cost anymore than getting a preground cam and sometimes is cheaper than some of the signature cams.

stevieturbo

A gain in boost is not what you want to see. Ideally you want the most power, with the least amount of boost.

I think LSx engines get away with high lsa's, is because their heads flow so much air. They simply dont need to go big, in order to make power.

A terrible example would be the Mini A-series engine. It has crap heads, and its cams tend to be in the 100-106 LSA range....it needs to use every ounce of scavenging/extraction it can to try and make power, and once you up the duration, low end suffers big time.

Floader

iTrader: (32)

why anyone would worry to much about the "low end" on a big V8 is strange. The damn things still have enough to blow the tires off in first and second at will. I have a D1 on a stock bottom end with a MTI 230 .580 on a 112. Low end is really not a problem, grip is the problem