Birdracing

Hey I am picking up a 5.3 litre tomorrow the motor is cast iron with aluminum heads bone stock.. Plan is to port and polish the heads, new cam, with a new intake, and a Holley 650 DP, with headers and a exhaust.For the trans i'm going with a 4L60E with a 3600 stall and shiftkit.. Plan is to shove this in a Mustang, and have some fun.. Planning for a mid 11 second pass what does everybody think of that??

Quick question what's the heads like on these 5.3 motors I really don't have the money for a new set think these heads will flow good?

Treyvs

My 862's off of my 2007 LM7 cleaned up nice. I slapped some new Enginetech valves and new valve stem seals in, along with some LS6 Springs. With having the smaller 1.89 valves, they flow just a bit less than a stock LS1 head.

wildcamaro

iTrader: (15)

Those stock heads will flow just as good as some aluminum aftermarket SBC heads...

ZONES89RS

iTrader: (25)

A set of 799 or 243 heads are the way to go. But what you have will work if the car is light enough. The 4l60 has a great first gear. Helps with launches.

Blackpanther99

iTrader: (8)

Stock heads will do fine.

If you can ever get some 243s for a good deal get them.

speedtigger

iTrader: (16)

Put a 750 Holley on it. 650 is too small for a light car with a 3600 stall.

5.3dime

http://www.gtsparkplugs.com/CarbCFMCalc.html

650 is not too small. My truck runs great with a 650 dp on it.

speedtigger

iTrader: (16)

Don't be fooled by those online calculators. They have been around for years. But fortunately, so have experienced racers. The 750 will go faster and the drivability will be fine. This ain't no old school small block.

Birdracing

Thank-you for all the info guys I know I said I wanted to put this motor in a Mustang, the only thing with that is I can't find a cheap 4cyl donor car, they rust out here fast living on the East Coast of Canada.. Another thing is I am trying to keep this build cheap, I have been looking at 2000 to 2002 2wd trucks.. The truck is full size 1500 series.

I have a few questions do these trucks come with a posi rearend? and what type of tranny's are in these trucks?. The trucks I have been looking at are 4.3 litres.. My plan is to keep the motor stock besides a new cam, intake, 750DP, with headers, and exhaust. For a tranny I was going to go with a 4L60E, with a shiftkit, and a 3600 FTI converter.. This will be a daily driver do you think this will be enough to get a truck into the 12's at the track?

What camshaft do you think I should go with? I am looking for the best cam that will suit this motor the best..

onefast84

Deff bigger on the carb!! Make some phone call to the carb manufacturers. 650 runs good 750 runs better, and maybe even bigger.

ZONES89RS

iTrader: (25)

Stick it out for a mustang I say. Worth it.

5.3dime

Sure and as an experienced racer I'm sure your familiar with carb signal. Put a big carb on a small engine and see how well it runs.

ZONES89RS

iTrader: (25)

A 750 on a 5.3 is not "big" I would say. With a cam, it's great. With no cam, 650.

speedtigger

iTrader: (16)

Well 5.3dime, when I say experienced, I mean 25+ years of racing, fabricating and machining car crap. I raced in my first NHRA division championship race in 1989 with a car I built myself.

On the car I raced in 1989, a 650 (4777) was quicker than a 750 (4779) because that is what the combination needed. Speaking from experience, I am telling you his combination will go faster with a 750 HP carb.

I don't care what Car Craft or some online calculator says, his 5.3 the way it is built with a 3500 rpm converter is not going to have a problem with "carb signal". If he had a stock or less than 2200 RPM stall converter, it would be a consideration. But he does not.

These LS engine move more air than the old school engines, therefore they need more carb to realize their potential.

5.3dime

Your resume is very impressive, with that being said I'm actually running a 5.3 with a cam in a 3000 pound vehicle. I too have a 3600 10 converter. I'm currently running 6.50's in the 1/8 mile with a too small 650 Holley 4777 double pumper. But I guess that's not as impressive as running a class in the NHRA.

speedtigger

iTrader: (16)

Try a 750HP.

wildcamaro

iTrader: (15)

I had a stock 750 vacuum on my 10:1 5.3 and it ran fine, but def made less trips to the pump with the 650 double pumper I put on...although like zone said I only have a stock type cam so I'm sure if I stepped up the cam I would prob need to put the 750 back on

ZONES89RS

iTrader: (25)

A 750 VS will usually use more fuel for allot of us over mechanical 650-750 dues to the secondaries wanting to pull open easier than we like. A mechanical is only going to do so after XX amount of throttle.

Birdracing

Finally got the motor here in the garage sitting on the engine stand, planning on halling the heads off the weekend to take a look to see what the cylinder walls are like.First thing i'm doing is going to bring the block out to our local machine shop, to get hotanked, honed, new cambearings and frost plugs..

I am going to say with the stock heads for now seeing that this is going to be a budget build I am going to get the heads ported and polished, I am looking for some advise on what cam to go with, anybody have any suggestions?

Birdracing

Removed the heads from the motor today, the cylinder walls are smooth real smooth, not a ridge on either cylinder.. Cleaned the tops of the pistons, they came out really nice and clean looking I was surprised.. Everything looks really good including the heads, all the valves look good I am going to clean them up tomorrow evening after supper, so far so good I can't wait to get this cleaned up and painted I am like a kid at Christmas..