ss.slp.ls1

iTrader: (36)

MS3 peak power is 6400rpm. I think you will be much happier with the power curve of the f13, peak power will be around 6000rpm and carry beyond that, while having more low end power.

bradenb19

im doing this, the 5.3 heads are identical to ls1 heads in flow numbers and rates, the only difference is the combustion chamber which is 61.5, instead of 66.2 hence the reason why everyone who knows anything is buying 5.3 heads for their ls1 head/cam swaps...

do the MS3 it'll blow your head off...

it unleashes the .600 lift potential of the 5.3 heads, which flow enough for 450rwhp.... STOCK! with porting and a 2.0 inch intake valve they're good for over 500rwhp

have fun and dont worry about ptv clearance, texas speed already confirmed to me that the new design requires no cutting of anything as long as you dont go crazy milling the heads

have fun blowing the doors off the competition

s346k

iTrader: (4)

typically the cam's peak is dictated by the intake used. almost every ls1 cam is *forced to peak ~6,300 rpm due to the crossover intake style. the big cams will carry power 7k and beyond. an ls6 intake in your setup i think would peak about the same, possibly 6,500 at most, but easily carry power past 7k. assuming the proper tune and aftermarket rod bolts, that motor would be shifted @ 7,200 rpm and live a long time doing so. ls1 engines are known for taking that kind of abuse, so theoretically a smaller engine would deal with rpm better. get this thing on the track, i want to see some results and your feedback!

SheldonZ28

iTrader: (4)

Im thinkign ill do this with my LM7 in my iroc-z. Im figureing ill buy the cam & heads, then down the road when i pick up my LS1 shortblock i can just swap the cam & heads over and be good to go.

MS3 and the 5.3L Stage 2.5 heads from TSP, think that should get me around 375rwhp, and then about 430rwhp when i go to the larger displacement

bduchch

what are the specs for the f13... who makes it, duration, lift, etc? i am going to be putting a cam in my 5.3 and i want a big *** cam like the ms3, but i need it to be streetable

ss.slp.ls1

iTrader: (36)

Thread revived!

The F13 cam is made by Futral Motorsports.

FMS-F13-112 FMS Custom Grind Camshaft - 230"/232" .595"/.585" 112LSA - aggressive profile with a 2500-6800 RPM range, rough idle $399.

http://www.futralmotorsports.com/fms....asp?pf=1&pg=5

It's a very nice cam, should be very streetable and make great power everywhere.

Black98Fivespeed

iTrader: (2)

40 hp with just the LS6 cam?! Oh I'm so stoked for my build.

bduchch

thanks for the info... it looks like a good cam, i'll look into it a bit more

what other mods would you guys do besides ls6 springs? im trying to do this on a bit of a budget

also, if anyone has some ls6 springs for sale, id be interested in buying some

ss.slp.ls1

iTrader: (36)

I would definitely run a better spring than LS6 springs! You will want to run some CC beehive springs with chromemoly pushrods at a minimum. Don't skimp on your valvetrain, it's very important stuff.

bduchch

i was told by 2 tech that i work with that the ls6 springs would be good for my build, thats why i was looking into them

are the comp cams 918 or prc springs any good?

ss.slp.ls1

iTrader: (36)

CC 918 beehive springs will work, PRC dual springs are also very good springs. I have also seen good deals for Patriot Gold spring kits.

bduchch

i was also lookin at the TSP torquer v.2 cam... would that maybe be a little better for my truck? the specs are 232/234 duration and .595/.598 lift with 1800-6400RPM powerband and with the 112lsa the idle should be nice and choppy

ss.slp.ls1

iTrader: (36)

I have a decent knowledge on cams, but no experience with putting them in heavy platforms. I don't want to recommend you a cam that might turn out to feel like a dog on the low end for a truck. You would be best to search some build done by truck owners and read their feedback.

Sales2@Texas-speed

iTrader: (5)

I would not put anywhere that much camshaft in a 5.3L engine in a 3300+lbs F-body, even for a dedicated drag race application!

ss.slp.ls1

iTrader: (36)

I currently have a stock '01 5.3 engine in my '99 SS (don't ask) with a LS1 intake and LS1 exhaust manifolds. It pulls very hard, just not on the top end like a LS1 does. It has a M6 and I can take out a stock LS1/4L60E fbody. I wouldn't be afraid at all to swap in something like a 228/232 on a 112. But I wouldn't go much bigger.

Sales2@Texas-speed

iTrader: (5)

Yea, I owned a 5.3L F-body for a little while too. 228R is about the limit I'd go on it as well.

Black98Fivespeed

iTrader: (2)

How do you mean limit? How was the driveability of the 228R? I'm stuck between the TR224 and the 228R for my build. How much of a performance increase would the 228R see over the 224? Other mods LS6 intake manifold, ported LS1 TB, CNC ported heads, and long-tubes, just for reference.

ss.slp.ls1

iTrader: (36)

By limit I think he is referring to the fact that an increase in cam size will sacrifice low end torque for top end power. Doing so also shifts the power band into a higher rpm range. Going too big could result in very little low end torque and a power band that will require you to spin your engine to the moon to see any real power.

You have to do your best to find the best balance of driveablity and power that YOU are comfortable with, everyone is different. Both the TR224 and the 228R would be good choices, with the 228R making a more hp and probably peaking a little higher, while the TR224 would likely have a little more low rpm tq.

Sales2@Texas-speed

iTrader: (5)

To be clear, the 228R would be as big as I'd go for a 5.3L in a heavy car. For a 346ci+ power-plant, I'm not scared to go a bit larger because of the extra cubes!

ss.slp.ls1

iTrader: (36)

I knew you were talking about the limit just for the 5.3.