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Old 04-30-2014, 08:04 PM
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trick flow heads for a 305

IV thought of a lot of idea for this 305, I'm scratching ideas, bit I noticed trick flow makes a head for small bore engines the 175 fast as cast 56cc 1.94/1.50, these heads and a rpm Q-jet intake and a summit 1103 cam with headers, get some impressive street power?

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Old 04-30-2014, 09:24 PM
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The cam is way too small to make impressive power
From a 305. If you want impressive 305 power you need to rev it up.
The GM L-31 vortec head is ideal for this.

Small cid needs rpm ( and/or supercharging) to get
Impressive.

Now a roots blown solid lifter can vortec head 305 would
Be impressive.
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Old 04-30-2014, 09:30 PM
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And a weiand 142 or Edelbrock enforcer blower will fit under that truck hood too.
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Old 04-30-2014, 09:38 PM
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These are simple easy engines to build using all
Off the shelf parts and a low cr dish piston 305 short block.
Got one?
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Old 05-01-2014, 07:45 AM
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Define "impressive power"....Anyway I think you're on the right path. That cam will have a bit of a lumpy idle and feel soft off idle on a 305 so select a proper rear gear and 2000+ stall convert to compensate. I have a set of trick flow 195's on a 400 and they're good quality heads, no complaints here. The 305 bore to stroke ratio can take advantage of a roller cam so if you can squeeze that in to your budget it would help.
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Old 05-01-2014, 06:37 PM
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Lol fbird I was told it was a ho motor, not really sure myself 100%, Im not sure about wanting a much bigger cam far as vacuum reasons, keeping MPG up if can,I also heard that the chambers of a 350 head would over hang / over lap the small bore of the 305 and really wouldn't be a great idea idk??
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Old 05-01-2014, 07:20 PM
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Quote:
Originally Posted by gofastz View Post
IV thought of a lot of idea for this 305, I'm scratching ideas, bit I noticed trick flow makes a head for small bore engines the 175 fast as cast 56cc 1.94/1.50, these heads and a rpm Q-jet intake and a summit 1103 cam with headers, get some impressive street power?
. The 1103 cam is good for about 380 HP at 6000 RPMs in a 305 with good heads and preferably 10:1 or higher compression ratio... whether or not you feel the need for a higher stall converter depends on whether you need a little quicker off the line RPMs for 1/4 mile usage... and what RPMs your current converter stalls at...

. 305's use 58cc heads, so L31 heads with 64cc chambers would lose some compression ratio... not desirable when going up in cam size... 56cc heads would help... there are Vortec 305 heads also, but use smaller valves, like 1.84"/1.44" and require special Vortec intake manifolds/bolt patterns...

.. 1103 is a 214/224 cam... base 305's use 194/202 cam (earlier ones maybe 184/194)... L69 305's use 202/206 cam (aka L81 'Vette cam)... last TPI 305's (Camaro/Firebird) used a roller cam and it may have been a bit bigger in durations yet than L69's...

. Another head choice is used/takeoff aluminum heads from '86 - '91 350" Vettes or ZZX - ZZ4 350" crate engines which also use 58cc semi-fast burn chambers and 1.94"/1.5" valves and use standard intake manifolds... good to about 380 HP max...
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Old 05-01-2014, 07:44 PM
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I don't have a stall at all its all in the foot (4speed), and I really don't want to run 93 octane gas, all that info was good though I'm just not sure what to do BC its a 305 , if it were a 350 it would be so much easier to just stroke it to a 383 low compression mild cam, intake, headers, but not the hand at play here, maybe ill leave the little bore motor alone. And just go firehall a 350 it would just be simpler? :/
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Old 05-02-2014, 10:40 AM
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. At today's gas prices, the improved MPG from a higher compression ratio engine more than makes up for the measly 20c more per gallon for premium gas...

. The return of higher compression ratios is one of the ways today's V8 trucks are getting into 20+ MPG range...

. You can stroke the 305 to a 337... LOL!
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Old 05-02-2014, 11:50 AM
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The OEM 305 heads don;t match the 305's bore either. Many engines are like this. EG: BBC. All flat heads etc etc.
The 64cc vortec head is for a supercharged 305 where you want a low compression ratio.

That camshaft in a low cr N/A 305 in a truck with a stock stall and stock gears will be a dog.

It needs 10:1+++cr 3000+++stall (buy a "3500+ stall") and gears. 4.10++.

A truck needs a lot of power to be "impressive"

If working wiht a 305CID engine you need to think supercharging.
A high performnce engine needs a high performance fuel.
If you don't want to put anything into the equation, don't expect much of a impressive result.
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Old 05-02-2014, 12:23 PM
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. LOL! We can drop the stall talk, he said it's a 4-speed manual...

. If swapping engines, just pick up a SBC 400"... add pistons and a cam...
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Old 05-02-2014, 12:58 PM
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Then it will need BIG gears to get anything "impressive" (acceleration) from a cammed 305. Its a truck.
Trucks are heavy and have big tires.
Even my simple Supercharged 305 combo will need 4.10+++gears for this truck.
(especially with a manual 4 speed transmission.)
It (a budget cammed up N/A 305) needs a 4.56 to 5.38 gears ratio.
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Old 05-02-2014, 03:53 PM
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. Again, depends on what is "impressive"... adding a couple thousand more RPMs of power in each gear... maybe just pulling strongly onto the expressway... or downshifting into strong pulling passing power on a 2 lane road...
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Old 05-02-2014, 05:25 PM
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Ok guys y'all both have great info, if I were to build up this 305, I probably would supercharge it, with a set of l31 heads. And beefed up springs for a bigger cam, supperhager runs around $2000-$2500 then heads junk yard specials 250$ it counting any machine work, cam I would still choose a summit grind so $100 or so, dang I mite aswell buy a crate motor lol
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Old 05-02-2014, 06:15 PM
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IDK what the flow & cost of those Trickflows are,but,best bang for a budget head on a 305 is the L30/305 heads.Pretty sure you can get a set of those & a nice intake for less than Trickflows.Wait til you get a 350 to dump alotta money on a good set of heads.
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