ideas for 12 second 305?? - Team Camaro Tech
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post #1 of 27 (permalink) Old Sep 19th, 06, 09:41 PM Thread Starter
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ideas for 12 second 305??

Ok I the 305 I got needs new rings so we gotta pull the motor. SO I figured why not do some more stuff to try and get it into the 12's. SO heres what I got so far:

3204lb car
4.10's
3000 stall
performer rpm manifold
650 holley double pumper
10:1 compression
ported stock 305 heads
1.5 and 1.6 roller tip rockers
and I still need a cam but need some ideas. Streetabillity isnt that big a deal to me so I do want something that idles really rough but is still gonna have real good power. Dont have power brake so dont need to worry about vacuum.

Last edited by fossilrunner; Sep 19th, 06 at 09:56 PM.
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post #2 of 27 (permalink) Old Sep 19th, 06, 09:55 PM
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Re: ideas for 12 second 305??

I don't know man....
3200 lbs is do-able, but those 4 extra pounds are crippling.

You could always use nitrous to get there faster.
Most guys here will suggest a 350.
PDQ67 will hook you up with some "little engine" combos
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post #3 of 27 (permalink) Old Sep 19th, 06, 10:00 PM
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Re: ideas for 12 second 305??

Welcome to Team Camaro!

What's it running now, ET and MPH wise?

Eric
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!
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post #4 of 27 (permalink) Old Sep 19th, 06, 10:02 PM Thread Starter
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Re: ideas for 12 second 305??

Yeah I know every one says 350's but I got a 305 So Im gonna try something different
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post #5 of 27 (permalink) Old Sep 19th, 06, 10:04 PM Thread Starter
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Re: ideas for 12 second 305??

well I havnt taken this car to the track yet cause it smokes to much and leaks oil cause the rings are the wrong size. all the parts that I listed are just parts Ive been collecting to do a build up
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post #6 of 27 (permalink) Old Sep 19th, 06, 11:04 PM
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Re: ideas for 12 second 305??

I did a Google search on "305 chevy build" and a ton of info came up, including this link.

http://jalopyjournal.com/forum/archi...hp/t-1494.html

Eric
69 'vert project big block/TKO 600 RR
68 'vert driver RS clone -- gone!
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post #7 of 27 (permalink) Old Sep 20th, 06, 11:26 AM
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Re: ideas for 12 second 305??

it should only take about 250 rwhp to get into the 12's with the right converter and gear at 3200 lbs, I dont think you'll have a problem just do your research, you'll need compression, good heads and the right cam.
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post #8 of 27 (permalink) Old Sep 20th, 06, 11:47 AM
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Re: ideas for 12 second 305??

Quote:
Originally Posted by Mwilson View Post
it should only take about 250 rwhp to get into the 12's with the right converter and gear at 3200 lbs, I dont think you'll have a problem just do your research, you'll need compression, good heads and the right cam.

When I was following the 4th gen cars closer 285-300 hp at the wheels was mid to high 13's. What is the right converter and gears to put a 3200lb car into the 12's with 250 rwhp?

...Dennis
www.camaroslimited.com

"Don't take life so serious, you won't get out alive..."
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post #9 of 27 (permalink) Old Sep 20th, 06, 11:58 AM
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Re: ideas for 12 second 305??

Here's some 305 Camaros running 10.30's. Maybe they can help you.

http://www.shopoutdoors.com/b&lracing.htm

The F/FIA cars run 11.50's in stock eliminator.
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post #10 of 27 (permalink) Old Sep 20th, 06, 12:41 PM
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Re: ideas for 12 second 305??

Nobody here can really give you an answer on what you need to do to the motor to make those timeslips. You need to buy some drag slicks and see where you are at right now. Then you'll know which direction you need to go.

With great traction, 12's is easy.

Matt Jones
Lead Mechanical Engineer
Art Morrison Ent. Inc.
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post #11 of 27 (permalink) Old Sep 20th, 06, 01:09 PM
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Re: ideas for 12 second 305??

Quote:
Originally Posted by DjD View Post
When I was following the 4th gen cars closer 285-300 hp at the wheels was mid to high 13's. What is the right converter and gears to put a 3200lb car into the 12's with 250 rwhp?
An accurate estimation of the power i make with my engine is 415hp at the crank.
taking 20% for drivetrain loss, thats 332 RWHP......and 11.22 @ 117 with a 1.46 60ft, in a 3215lbs 67' Camaro.

theres a host of 11-10 second 305 engines in stock eliminator. Say what you will about how stock they are, but those guys are all doing it with stock castings, stock compression, stock carbs (or FI), stock intakes, and a stock lift cam, along with 1-1/2" to 1-3/4" primary tube headers.
the cars arent light ethier.

to answer your question, an ATI treemaster, and somewhere along the lines of 4.10 gears depending on the estimated peak power RPM and trap speed.

Brian's Camaro build up
BSE Power 385"
Best ET 11.15
Best MPH 117.42 mph
Best 60ft 1.46

Holcombe Fabrication Bolt-On camaro Chassis!
PM for pricing/options
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post #12 of 27 (permalink) Old Sep 20th, 06, 01:32 PM
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Re: ideas for 12 second 305??

A 12 second 305 would be some impressive bragging rights!
Not everyone can do that.
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post #13 of 27 (permalink) Old Sep 20th, 06, 06:07 PM
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Re: ideas for 12 second 305??

Try here!!

"From a 1995 Chevy High Performance article.

305 Engine Build-up.

1 ’69, 041 double hump 1.94”/1.50” valve heads cut to 59 cc’s. Bowls blended and only the exhaust ports polished.
2. Manley Pro-Flo valves, PN 11560 intakes and PN 11559 exhausts.
3. CC 292 Magnum hydraulic cam, 292/244, 110/106, .501” lift.
4. 350 rods rebuilt with good bolts and nuts.
5. L-69, 9.5 to 1 CR. LU5 fuel injection short-block engine with stock head-gasket gives 10.6 to 1 CR. Or a
6. LG4, 8.6 to 1 CR. engine will give 9+ to 1 CR.
7. Deck height was .014” down with stock four valve notch cast pistons.
8. Quench was about .035”.
9. Hooker 1.75” four tube long headers with 3.0” collectors. PN 2110 for a Third Gen. car.
10. Holley 650 double pumper PN 4777 and an E-brock Victor Jr. intake.
11. 4” K&N open filter.
12. Good Electronic ignition

The little bugger made like 402hp up top!! They ran it until she spun a bearing or just came unglued!

AND

An old RHS, Memphis, TN, 305 motor build-up that makes right at 300hp. http://www.goingfaster.com/spo/290hp305.html
Chasis Dyno Test
7000rpm --- 300hp

And Hotrodding the 305!
http://www.goingfaster.com/spo/modthel03.html"

I saved these just for this!!

BUT, imho, a 144 blower will get you there easier than anything else..

pdq67
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post #14 of 27 (permalink) Old Sep 20th, 06, 09:15 PM Thread Starter
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Re: ideas for 12 second 305??

well I got the 4.10 gears and 3000 stall converter. I also got 275/60 m/t drag radials and traction bars so getting it to hook should be no problem.
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post #15 of 27 (permalink) Old Sep 20th, 06, 09:42 PM
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Re: ideas for 12 second 305??

Quote:
Originally Posted by fossilrunner View Post
well I got the 4.10 gears and 3000 stall converter. I also got 275/60 m/t drag radials and traction bars so getting it to hook should be no problem.

What about the rest of the suspension?

...Dennis
www.camaroslimited.com

"Don't take life so serious, you won't get out alive..."
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