I might be crazy

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monte olrac said:
personally you should mill down some different head, while 416 are far better than your average 305 heads, they will leave you lacking power after 4800 rpm, so spinning that motor up to 7700 will just be to impress the tach watchers,
... for a daily driver, his motor won't be seeing much action past 4800rpm anyways. And I think the aim here is to save money. So why not stick with what he has.

CamaroAdam73 said:
would i be able to make better power with a mechanical flat tap VS the hydraulic flat tap style cam
... yes, when it comes to power, solid is always better than hydraulic. But as a daily, low maintainance car, its a pain in the *ss to lash valves. Do you also want to put up with the extra valvetrain chatter? I say stick with hydraulic. At these powerlevels, you won't feel the difference anyway.

And, about your carb,
I still think using a 780 will be WAY too much for that "340", even if you use tiny jets. Just pick yourself up a used Q-jet, they are everywhere. It'll be a much better combo for your engine, and you'll love the mileage you get.
 
khan0165 said:
monte olrac said:
personally you should mill down some different head, while 416 are far better than your average 305 heads, they will leave you lacking power after 4800 rpm, so spinning that motor up to 7700 will just be to impress the tach watchers,
khan0165 said:
... for a daily driver, his motor won't be seeing much action past 4800rpm anyways. And I think the aim here is to save money. So why not stick with what he has.
khan0165 said:
And, about your carb,
I still think using a 780 will be WAY too much for that "340", even if you use tiny jets. Just pick yourself up a used Q-jet, they are everywhere. It'll be a much better combo for your engine, and you'll love the mileage you get.

I see your point on the heads, But still they'll choke down your usable power range severly. I know budget has alot to do with what we can do, but if all possible I would save up some extra money and buy some vortec's there budget friendly and you'll get the the full use of your engine...also that 780cfm carb will be too much for that motor, really it goes back to the heads you'll stay running rich, I belive its because the heads only flow so much air and that carb is going to pump more fuel than needed in the mixture, i was running a 750 on my 388 with 416 heads and i couldn't get that b*st*rd to run right until i got a smaller carb.
 
the vortecs would be a sweet addition for the 350 he's building on the side...
 
Yeah, the 780 carb is going to the 350 now anyways, And I've got two different Q-jets, but i think one is a 750, from a 1967 Impala SS(327, same place the cam came from). I have no idea what the other one is, haven't got around to pulling it apart.

I did drop the 416 heads off at the shop for some shine up, and the intake I'm using, port matching should help slightly. The heads have the 1.84's (intake) stock, I've been reading up on people using 1.94 race valve, And seeing good results. I'm leaving the exhaust valves as is.

And yeah, having to adjust valve lash would suck for a daily driver, but if the power increase is right then I'll go for it. A mechanical flat tap cam is cheaper than a hydraulic flat tap cam anyways. And from what I've seen, being a low-revving motor, solid lifters should out-live hydraulic ones.

Stock 1.84" valve in ported intake
Lift........CFM@ 28"
.05...........29.4
.10...........57.4
.15...........88.3
.20.........122.1
.25.........152.2
.30.........172.9
.35.........188.7
.40.........201.8
.45.........213.3
.50.........217.8
.55.........220.7

Modified 1.9" valve in ported intake
Lift.........CFM@ 28"
.05...........33.0.........+3.6
.10...........65.3.........+7.9
.15...........98.2.........+9.9
.20.........129.8.........+7.7
.25.........158.5.........+6.3
.30.........181.3.........+8.4
.35.........200.4.......+11.7
.40.........217.2.......+15.4
.45.........230.0.......+16.7
.50.........227.2.........+9.4
.55.........221.4.........+0.7

from : http://www.thirdgen.org/techboard/tech- ... rflow.html

With this build, every little incremental increase in flow and power helps, it all adds up in the end.
 
those head flow numbers are for ported heads, so if you can do the work on them go for it, if you need to pay someone to do it...Buy some different heads.
 
CamaroAdam73 said:
But i'm going to build up a 305, with a nice price tag.

I picked up a fully assembled, and running 305 for 50$, i didn't think it was much of a find untill i ran numbers.

The heads are the 14014416 cast heads, which have some potential. And pretty much they are the entire reason for this build, that and my bottom end is punched .30 over and stroked (340 displacement overall) .

Tuggy24g said:
Not to bad mouth you or anything, but why are you going to build a 305. They are not made to be fast engine what so ever. You could find a cheap 350 and build it to have 400HP for much cheaper then a 305.

In the very first post he answered your question. He found a 305 stroker for $50.
 
Thanks 86Cutlass383SR. 😀
Yes, a 305 is not meant to be a FAST motor, but it can be a QUICK motor, for a good price. Just because it put 400 horses down doesn't mean it's not a good motor. And I'm not aiming for 400HP, not even close. I'm seeing what the best realistic power output out of a 305 is, without dumping money into it.

As for the flow charts there, yeah i plan on doing some of the minor porting work myself, nothing to serious, because I'm not that experienced with porting my own heads. But at least if i screw up its not that big of a loss. I figure if i can do some minor port work to these heads, then anybody here on this forum with some engine know-how can too.
 
Tuggy24g said:
Not to bad mouth you or anything, but why are you going to build a 305. They are not made to be fast engine what so ever. You could find a cheap 350 and build it to have 400HP for much cheaper then a 305.
... don't be a dumbass... go back and read the thread over.
 
CamaroAdam73 said:
Thanks 86Cutlass383SR. 😀
Yes, a 305 is not meant to be a FAST motor, but it can be a QUICK motor, for a good price. Just because it put 400 horses down doesn't mean it's not a good motor. And I'm not aiming for 400HP, not even close. I'm seeing what the best realistic power output out of a 305 is, without dumping money into it.

As for the flow charts there, yeah i plan on doing some of the minor porting work myself, nothing to serious, because I'm not that experienced with porting my own heads. But at least if i screw up its not that big of a loss. I figure if i can do some minor port work to these heads, then anybody here on this forum with some engine know-how can too.
Adam,
I love your aditude! I say go for it, say nay to the nay sayers. And even IF it goes over budget, hey you learned something doing it, and you taught us along the way!

I love this forum, cuz when it comes to respect, support, and incouragement of cookie ideas, this forum is so far beyond sites like thirdgen.org

and I think your 305 is an awesome build cuz it's what hotrodin is all about. Taken what you already have and getting the best out of it to make yourself a mean machine. Makin lemonade outta lemons!

good stuff :mrgreen:
 
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