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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 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, 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, 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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Old 05-02-2014, 09:26 PM
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True, I thinking of keeping my eyes peeled for some aluminum L98 heads , trick will be finding them for the right price!
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Old 05-03-2014, 09:07 AM
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Ill keep my eyes open for a set of l98 vett heads
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Old 05-03-2014, 02:18 PM
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Quote:
Originally Posted by gofastz View Post
Ill keep my eyes open for a set of l98 vett heads
. They used to sell new everywhere for about $500-599/pair before the GM bankruptcy... now about a ridiculous $1200... GM doubled a lot of parts prices...

. Actually, I thought Trick Flow discontinued their '305' heads many years ago...

. Chevy SBC 400 crate engine:

SBC 400 406 Cubic inch Small Block Chevy Engine Stage 1 | eBay

. 364 HP , 458 lb.-ft. torque... would avoid the standard lopo emissions 200-250HP rebuilds, you can find 350+ HP ones for the same money...

Last edited by BuzzLOL; 05-03-2014 at 02:27 PM.
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Old 05-05-2014, 08:22 PM
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IV been looking at the gmpp zz4 heads I really like them, 569$ assembled
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Old 05-05-2014, 08:26 PM
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And that 406 is not a bad deal at all, looks good, wonder what kind of heads and cam it sports?
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