Rustydawg

I'm thinking of porting some 416 castings and milling them a bit, those of you running 305s w/416 heads, post your ETs (and any mods you may have done). Thanx.

RB83L69

I'd like to know this too.... with as much hoo-ha as there has been around here lately about how they flow as good as Vortechs, I'd like to hear from all the people out there with N/A cars with 350s running 305 heads in the 12s or even low 13s (sub 13.3) like a simple Vortec 350 will do.

F-BIRD'88

YA! ...... let's see some time slips!!!!


Seriously... Gonna have to wait till spring to get a track time on mine now.

Too frikken' cold out to go install them and the track is closed for the winter.

Cruzin Kaz

How about a Gtech and Moyer Rd F-BIRD'88??? J/K I don't have a Gtech anyway. But running Moyer right now would be fast for anyone considering the cold temp.

F-BIRD'88

I have a Vericom.. Works pretty good too. I usually test on Coon Rd. In St Kitts. Moyer is way too hot....:sillylol:

Cruzin Kaz

LOL!

Everyone is using either Montrose or even townline now. Don't think I have seen you car yet. We'll have to get toghter come spring and shoot the crap sometime.

F-BIRD'88

I don't bring 'er out to the street wars any more.

Way too much standing around. Just take it to the track.
Can't afford to get scooped.

Cruzin Kaz

Oh I agree with you there. I don't race on the streets either ...just the track.

pskel350

well i hope that i can hit mid 13's with a N/A 350 with 416 heads, most ppl think that i will be able to.

Rustydawg

That's the spirit boys, keep those numbers pouring in...

NTChrist

Are you still planning to fit a 400 under your 416's, F-BIRD'88?

That'll be a sight to see. Def want a ride in that car.

84305HO

Went 14.20 with L69 with the stock 416
heads, see sig).
Daniel Burk went almost 101 mph though the traps with ported 416's, see tech
articles.

Sitting Bull

Why don't you do up a set and try them out? You got all winter and what have you got to lose? I'll bet you have 305 castings and spare valves and whatnot kicking around your shop

F-BIRD'88

No, the new 406 is getting some seriously ported, big valve Vortecs (another set).

The ported 416's are going on the 350 that is in the car now
as soon as I get access to a garage or, spring comes.
Then I'll do some drag testing.

TBI305Camaro

what motors do the 416s come on??

Mark A Shields

305 TPIs, I think.

Momar

416's come on l69s and lg4s I believe. Thats what was on my lg4 and they are now ported and sitting on my 350(should be able to start it next weekend). I ported them and put them on because I had nothing better to put on it and it was supposed to just be dropped in place of the 305 basically stock but I ended up doing a bit more than I planned. Unfortunately I have stock valves in it because I plan on going with an aftermarket head eventually and didnt want to spend to much on them. I do have a set of new stainless 1.94 and 1.5 valves though. I am not putting them in now because I just want to get the car running at this point, but do you guys think these heads would be worth putting them in later on. If so Will it ruin the port job and need to be done again? Oh, and also I will have it running to break in the cam and such, but I dont have my exhaust yet so i wont really be able to drive it plus we dont have a quarter mile track around here anyway so I wont have numbers anytime soon. Specs in sig.

Ben

RB83L69

They come on LG4 (carb), L69 (carb), and LB9 (TPI), up to 86.

jimmy_mac

I am gonna try my best to get to the track this Sunday. I was gonna go yesterday but **** happens. I have a very similiar set up to Momar's. I am running the 416s on my 350 but they are not ported. However they do have 2.02 intakes and 1.60 exhaust valves and have been unshrouded. I know some are of the opinion the bigger vavles won't help, but if you have ever looked at the ports they look very similiar in size to typical 350 heads and the valve seat looks like the bottom of a toilet bowl. I think they were meant for bigger vavles. And yes I know narrowing a pipe creates higher velocity for low end torque, but since i can barely get any traction at all first through second I don't think I need any more low end torque.

I am also running a stock alluminum intake(also from a 305) and a Q-jet. Trans is a WC T-5. I do have hedman headers and 2.5 inch y-pipe but intermediate pipe is stock(2.75 inch). Cam is comp cam 269HR.

As you guys know the cold air is good for motors but the cold ground is not good for tires so we will see how the 60 ft times are. But anyway the trap speed should not be altered to bad. Any guesses on E.T. I am optimistically hoping for high 13s.

Rustydawg

I would think that the big valves will help, especially on the bigger cylinder of a 350. The trick is matching the port & bowl to the larger seats correctly. Only a flow bench or a seriously experienced cylinder head porting expert knows for sure.

I hope you do get a chance to run it, I'm quite curious to see how much horsepower the heads can support - although you've got more cubes and larger valves than my project.

The trap speeds alone will be a great indicator of how much power you're making if your 60-foot times bite (or don't bite, depending on how you look at it!)

Momar

jimmy_mac,
Let us know how you do. I am very interested because even though we have some pretty good differences I would be interested in seeing what these heads will do on a 350. Oh man I can wait to start mine(like I said hopefully next weekend). Although even when I get it started I am not going to really be able to drive it yet because I only have headers and no exhaust yet. I will(assuming no major problems) just start it up to break in the cam, and maybe take it out in the country and drive it a bit.

Ben