How does this sound total so far sits around $2800. The engine is a 315 small block, 3.8 bore; 3.48 stroke.

Holley Carb

Cylinder Heads I need to order 2:cry:

Intake manifold

Dress Kit

Rocker Arms

the bore is 3.8, it says .060 on my pistons so i guess these are appropriate.

And a lunati Cam and lifter package:

Cam specs.
Advertised Duration IN/EX: 262/268
Duration @ .050 IN/EX: 219/227
Gross Valve Lift IN/EX: .468"/.489"
LSA / ICL: 112/108
Valve Lash IN/EX: Hyd/Hyd
RPM Range: 1400-5800

I want feed back this is costing an arm and a leg.

 

3.736 + .060 = 3.796", just like they say. That's not 3.8", it's 3.796".

Carb: Poor choice. Get a DP.

Heads: Overkill on a 305, valves will be shrouded, port flow will be retarded until RPMs build up. Get some regular upgraded-for-lift Vortec heads if you insist on Vortec type, and have them shaved to 58cc.

Intake manifold: Okay on Vortec heads.

Dress kit: Why?

Rocker arms: No way on anything over stock lift.

Pistons: You don't need floating pins. Waste of funds.

Cam: Okay.

Rather than spend $2800 on a 305, why not spend $2800 on a 355? Don't tell me because you don't have a 350 block, you can get one for the difference in piston cost.

 

okay sorry about the 3.8 holley had the 305 bore listed @ 3.74. Rounded I guess.

So basically the carb sucks, the heads are overkill which i am glad because i dont have 1200 for heads alone. But 23* heads would be nice, Intake, because it's low rise and i am leaning towards a 65 Mustang so it will hopefully fit I dont like cowls.

Dress Kit because I like a nice clean engine bay and its relatively cheap. Plus i need that stuff anyway

I need Roller rockers for that cam what do you suggest funds are tight. Oh and i can use any spring that is stronger than the one recommended right? They said 110, i am aiming for maybe 130.

As for the 305 i dont have a 350 block but this motor only has 10K on it. Thats why.

 

The early 305's had a 3.736" bore the 85 and up 305's have a 3.74" bore. Don't quote me on the exact year but it somewhere around there.

Yes they actually did change the bore size.

 

For your daily driver, toy, race, etc...???

If daily driven that carb is fine

Heads are overkill big time for a 305 with these specs, for a great head on a budget you can buy Vortecs in different stages depending on how large a cam you want to run at very affordable prices. Best bang for the buck for a low cost thumper IMO.

Intake will work better than stock if you need to retain hood clearnace, otherwise performer rpm would be a better choice so you could grow into it with the next motor as well.

Dress up kit, most of us like pretty engines, but if you can upgrade engine parts with this money now, do that since you can always make the engine pretty later-chrome dont make ya no faster or run any better-keep that in mind with your budget.

Rockers are fine, I ran them for 2 years on my first bracket motor 355cid with .480/.480 lift, LOTS of street miles and a whole lotta rounds, never ever showed any sign of wear/fatigue, yes they're cheap but they work great. I personally would never put aluminum rockers on any cam of decent size no matter what the mfg. warranty and a .480 lift cam aint no decesnt size cam

Pistons are fine

cams a little on the small side, but will work good in a daily driver with good off idle power.

Just my $.02

 

Have that carb on my 420 HP 355 so i would think it be very much overkill on a 305

 

Not really, he's going with some nice aftermarket/better flowing than stock heads, a slightly larger than stock cam, etc...that carb will work out fine. Also keep in mind, 1 day most guys usually outgrow a 305 and step into a 355 or larger, it's alot simpler/smarter to buy the parts now ONE TIME since they can be swapped over if/when the time comes.

2 things to keep in mind, 1. it's a vaccum secondary so it'll only draw what's needed and when-meaning with proper tune on carb it'll run fine for a VS, but better with a DP

2. Holley purposely overrates their carbs for the simple fact most guys buy bigger than needed, it's "their" little safety margin I guess you could say to keep YOU/US the consumers from going overkill on a carburator, unless you know that's the game they play. I got burnt when I bought this 950HP years ago, checked into it and found out for myself after the fact.

 

what do you guys think that cam will push. ie hp and torque on a 315 i'm looking for faster than my iroc but not dangerous this is going to be a daily driver, and will probably go in a mid sixties v6 mustang

 

heads will be a big factor for deciding ultimate hp, I'd say off the hip you'll be around 300hp?

 

The 305 is 3.736" no exceptions. I looked at the specs for every late model 305. Even the latest model vortec roller cam 305 engine specs out at 3.736". It is the GEN II 265 that has the 3.74" bore.

 

Thats what i am aiming for, any ideas on heads my dad said i am not spending that much on heads, you think ported, decked, and 1.94 Intake 416 heads can do it?

 

Thanks i guess it was a rounding error

 

If your going to spend any money put it on the heads first and foremost, heads are 70% of what goes into how much power an engine will make, you can have the best of everything, slap some junk factory casts on and just have a pile of scrap, on the other hand you can have a pile of scrap, throw on some good heads and have a nice power plant, all you need to do is look in my sig for proof of that.

 

Damn i wish i could remember where i read it!

 

Absolutely!

This question has been hashed out at least 1000 times on this forum.

Well ported and polished 416s (with 1.94 intake valves) add real, detectible power. When done right they keep right up with Vortecs.

 

Not being a sinic, just a realist. Think of the extensive work that goes into port/polishing a set of heads, now be realistic about how many kids/guys that have tried this, have the tools and basic grasp on what to do, and yeilded good results-which unless flowed the average guy wont have a clue if they actually gained performance or hurt it. Now figure in what it'd cost to have somebody else do it, boom, you just surpassed the price of box stock heads that are already doing what your going after.

Many guys that do their own work, never do a A-B testing on just head porting alone, they go to all this work thinking they've done a great job on these heads, but also install a cam, upgrade intake, swap out carb, etc... at the same time so seat of the pants and mentally they think the porting did a great, buy without the proper equipment it's impossible to know for certain what the heck you just did when hogging them out.

 

ihi,

If I were porting a set of Vortecs I'd be a lot more nervous than a set of 416s. It is really hard to screw up the port and polish job necessary for 305 heads like the 416s, 081s and 601s. That's why so many people have great success with them. You can do it--and it will work great!

If you need a hand just drop me a line and I'll help as much as I can

 

I 100% understand where your coming from, we've all been in or are in the budget build boat, and starting with a cheap head for practice is the best way to learn, but I've seen guys literally screw up an already bad head and some of the other fellas started with good heads and turned them into trash with rookie mistakes, or practices that were good intentioned, but went bad.

Regardless, if any of these guys are looking to port their own stuff, getting heads flowed is very cheap in teh big picture-usually $30, have them flowed before hand at a shop, do your work then take them back. Most all shops will work with you and give you first hand pointers of what to do, areas to concentrate on, areas to watch out for, etc...and this also helps build a repour for future endevours.

 

thank you i have to take them to a machine shop any way, might stick with th 416's for now but i need a car to put the engine in a 67 6 cylinder Stang sounds like a good idea.