Dewey316

Well the title really sums it up.

i am thinking of putting a spare set of 416s that a friend of mine has laying around on the L03.

i am trying to figure out if it is worth the effort. (of course i will do a cam at the same time ) but am i going to see any sort of gain above putting a cam in on the swirl ports?

also i hear alot of people talk about the lt1 cam with TBI, what other options are there for TBI that are streetable? what are the lt1 cam specs? and also what cam would be a good match up with the 416s if i go that route.

thanks in advance.
John

Cronic3rd

Anything is better than swirlport heads. And from what I hear 416s are some of the most desirable 305 heads.

Dewey316

ok, my friend who has them works at a machine shop (how convenient ) he said if i descided i wanted them, he would megnaflux them, and clean them up and all so they are in good shape.

i just didn't know if on the TBI, it was the heads, or the cam, or the intake that are really holding it back, if the swirl ports are that bad then i will drop them.

Thanks

and if anyone has some cam that work well with TBI let me know.

Cronic3rd

The cam sucks too. as far as I know the intake isn't that bad but I am not sure about that.

Dewey316

well, what i am looking at is this.

i know the lo3 sucks. i know a 350 is better for power.

i am not ready to do a motor swap right now, but i want some more power , but also don't want to spend to much money on an engine that isn't go to be in my car for all that long.

i can get ahold of the 416 heads for basicly nothing, so then my cost comes at for a cam, and probably new valve springs. so i would then want to know if i would want to new a new intake. i can get a 454 TB (again basicly free, from another friend) and if i will notice a good gain over the factory peice, pick up either a ededlbrock or holley intake, but i need someone to justify the 200 bones for the manifold ) also i have 3" flowmaster exaust, but would be adding headers to complement it. i am hoping i am going the right direction here, in my head it seems to work, but i want to make sure this is a descent combo before i drop money into it.

Cronic3rd

WHat you are talking about is similar to what I plan on doing to my car in the next year or so. IMO that kind of set up would make for an asome daily driver. might not be all that impressive at the track but with the right cam it should be a 14 second car. That is great for a fuel efficent daily driver. BTW go with the BB TB (600cfm flo vs 400cfm) and call or e-mail comp cams and have them recommend a cam.

Dewey316

so you guys think those heads are they way to go?

what about the manifold, should i do that or just use the factory manifold?

Dewey316

also, what about computer work , i have never done prom burning, i have no problem getting into it, but will my car at least run descently on the stock computer with a combo like that? or am i looking at tuning it before it will even be drivable.

BronYrAur

iTrader: (1)

If you make the fuel pressure regulator adjustable you could probably get away with the stock computer for a while. I'd also say to definitely go with a new intake. After you put on the rebuilt 416's have a decent cam and full exhaust the intake will then be your main bottleneck; I think it would definitely be worth buying a new intake.

Dewey316

thanks guys...

would i want a VAFPR or just a nore adj. regulator?

also for the intake manifold, (since the search isn't working) i know that some people have had problems with the holley, but what sort of problems did they have?

iroc22

You'll do fine with the stock chip. The LT1 cam is so small and the 416's don't flow amazing amounts that it will throw the computer off. I ran a 270* cam with World Products S/R heads and the it ran fine with the stock chip. I didn't even bother with an AFPR unit.

Dewey316

one more question . . .

what is the size of the cubustion chamber on the swirlports? are they 58cc ??

BlackBird92

Yes, they are 58cc.

1MEAN92RS

yup, they are 58cc chambers. I'm pretty sure the 416s are 64cc, but don't worry about it dropping your CR too much... the increased flow will more than make up for the loss.

Dewey316

ohh i thought the 416s were 58cc, as did the person i will be getting them from.

Cronic3rd

I a m pretty sure they are 58cc too.

chevymad

They're 58cc. Go to mortec about 3/4 of the way down the page.. 14014416 80-86 305 1.84/1.5 valves and 58cc chambers.

1MEAN92RS

Damn! Thwarted again! Now seriously... that's good to know! I guess you learn something new every day.

camaronewbie

I'm an LO3 and 416's are my plan as well. I have a set from an '85 Z28 parts car I bought. Just got 'em cleaned and checked at shop, now ready to port & polish them - never done this before, but what the h$ll, we'll give it a try. Shop also told me NOT to touch the bowls if I wanted 1.94 valves - said he could bore them for me easily for extra $50 - so on my 416's looks like I just need to do some light smoothing, and shine the exhaust side.

I'm doing an LT1 cam, and a Weiand Action Plus 8000 intake, with self-made dual snorkel. I'm emmissions, and must have the EGR from the 8000. Posi rear awaits install, and all that's left is choosing a header set.

Ready here - JUST WISH WEATHER WOULD COOPERATE!!!!!

Dewey316

sweet, mine are getting checked out at the shop tomorow, getting megnafluxed, ect. i am going to be getting a 4bbl manifoldd, not sure which right now, and will also be calling a couple of cam manufactors i will probably either get an ultradyne or comp.

headers are still up in the air for me also.

good luck with your project!

Pablo

iTrader: (1)

you might want to do a search on this, its come up a few times

I run ported 416s on my combo, they are around 58 ccs... that number gets quoted alot but ive seen most measurements actually come up with 55 cc's, for the swirl ports too.

if you can get that deal I would go for it but i would definately without a doubt atleast clean up the casting flash in the ports and while you are at it do some bowl work at least it will make a huge difference. I fully ported mine and it runs pretty strong

Dewey316

i am getting them. he checked them out at his shop, says they are in great shape.

now i am looking for a junker set of heads to practice porting on before i start grinding away on teh heads i will be using.

pablo, i have been doing alot of reading on porting, and am feeling a little more confident now. i am going to gasket match the heads/intake, do alot of bowl work, work on the short side radius/valve guides. i also want to polish up the cumbustion chambers.

i just have to find a set that i can screw up on first.

Cronic3rd

Don't you have a set of swirl ports?

Dewey316

no, beacuase my car gets driven alot, so i need it drivable. until i am going to do the swap.

Cronic3rd

sry i wasn't being entirely sierous (not i can't spell - at least i use punctioation). Does your buddy at the machine shop have a cracked head you practice on?

Dewey316

i need to find out... i will dig a pair up somewhere, might call some local junk yards this afternoon.

black89ws6

I've got a set of 416's on my lb9. I'm planning on doing something for heads this summer, either doin a little work on my 416's or lookin for some ZZ4 heads.
The upside of goin for zz4's is gonna be driving my car while doing the head work. The downside is $$$

right now it's kind of a tossup between the two. $$ will end up being the deciding factor. That said, now my question. What's a fair price for the 416's if I were to sell them? They have 150K miles on them, and like any head with that many miles, they will need the usual attention given to them. To my knowledge, they've never been off the motor (i bought the car at 120,000 mi)

SC2camaro

hey guys

What year did the 416 come out on and where they on the L69 or the Lg4 engine or both i have a couple of 4 barrel parts cars for parts also how do i know if thats what they are. Are they any better than going with the vortec heads?

also i have been doing some research on cams ffor these motors TBI's don't like alot of duration because of standoff in the intake. from what i have nest gathered that the LT4 cams is great for these motors then add some 1.65 rockers from the 1.55 to help on valve lift. On these engines yoou need to open the valve as far as you ccan ssince it is a small bore engine and can't get big valves in them.

iroc22

The 416's have been around since 80-81 IIRC. Before that it was the 601. All LG4's, L69's and LB9's up to '86 had the 416's.

The Vortec's definitely are a better head to run. If you can work around the EGR issue they have some great power making characteristics already worked into them.