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302 build
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89Gmcsierra
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Joined: 28 Oct 2012
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Location: Hazleton, Iowa
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PostPosted: Mon Jan 27, 2014 2:14 am    Post subject: 302 build Reply with quote

i just bought a 1980 mercury Capri
has 306, Roush 200 heads, roller rockers very mild camshaft. Torker 289 intake, 600 edelbrock MSD 6a box 10.5:1 compression what im told, Keith black forged flat tops. and factory crank and rods.

I wish to get more power. what would be best bang for my buck, camshaft and intake i want to switch. also non roller block.
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Mon Jan 27, 2014 2:32 am    Post subject: Reply with quote

Put a 5.3 ls motor in it.
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clay
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PostPosted: Mon Jan 27, 2014 11:09 am    Post subject: Reply with quote

How drivable do you want it to be? If you can change converter / gear to make it work more rpms would be my approach for outright power. However with the lack of displacement it could become a turd in a hurry. Clay
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Big Dave
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PostPosted: Mon Jan 27, 2014 11:40 am    Post subject: Reply with quote

I agree with Clay's assessment. Chevy built a five liter race car for the public, but if you have ever watched an owner of a restored Z/28 (not a Z/28 with a 454 motor installed) trying to park his car at a car show you will get an idea of what Clay is talking about.

The 302 had a high rise dual plane intake topped with an 800 cfm Holley. The problem is with the 30/30 solid tappet Duntov cam that ran fine up to 10,000 RPM (peak power was at 7,800 RPM) but also required a 4.11 rear gear to enable the car to be driven on the street.

A dual purpose race car and street car requires a five to a seven liter EFI Chevy LS-x motor if you are trying to put an engine in a GM car. If you have a FOMOCO car then you need a V-8 (or V-10) modular motor with a four valve head and of course EFI. EFI utilizes a computer that monitors the motor 16,000 times a second to keep everything running optimally. It allows Mr. Jekyll and Mr. Hyde to occupy the same body simultaneously.

Big Dave
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89Gmcsierra
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PostPosted: Mon Jan 27, 2014 11:54 am    Post subject: Reply with quote

I just want weekend car for the track 12s I would be happy with. Was looking @ 4:11 284hr cam and 4500 stall has c4 tranny. Not sure for carb.
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Paul P
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1971 Chevrolet Chevelle

PostPosted: Mon Jan 27, 2014 1:21 pm    Post subject: Reply with quote

Your plan looks ok with cam and gears. I would look into porting the heads, lighten the car as much as possible and you might get there with what you have. Do put a Holley carb on it too.
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Mon Jan 27, 2014 5:29 pm    Post subject: Reply with quote

Before you start throwing hard parts at it get a wideband O2 with a datalogger and get a baseline. Gears, converter, and tires will give you the most bang for your buck. Those cars are pretty light and I'd think 12s should be very doable.
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89Gmcsierra
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PostPosted: Sat Feb 01, 2014 4:09 pm    Post subject: Reply with quote

I've been talking to a mustang guru that also runs a 306, he's running 1/8th mile in the 5's. telling me 4:10 good stall good tires. upr suspension i shouldnt have to touch that engine for 12's. so right now going for suspension and gears first. maybe by the end of this year open the motor.
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af2
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PostPosted: Sat Feb 01, 2014 8:02 pm    Post subject: Reply with quote

89Gmcsierra wrote:
I've been talking to a mustang guru that also runs a 306, he's running 1/8th mile in the 5's. telling me 4:10 good stall good tires. upr suspension i shouldnt have to touch that engine for 12's. so right now going for suspension and gears first. maybe by the end of this year open the motor.


Runnin 5's in the 1/8????? He is spraying the shit out of it period..
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89Gmcsierra
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PostPosted: Sat Feb 01, 2014 8:10 pm    Post subject: Reply with quote

https://www.youtube.com/watch?v=gbyFd3ol7p0
this is 1st 250 shot he ran.
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af2
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1933 Willys Coupe

PostPosted: Sat Feb 01, 2014 10:04 pm    Post subject: Reply with quote

Laughing Laughing Laughing Smile
That is what I was saying...
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William Jones
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1971 Ford Mustang

PostPosted: Wed Feb 12, 2014 4:47 pm    Post subject: Reply with quote

12s will be no problem when you get what you have already sorted out and get it to hook. My sons car runs 7.30's in the 1/8 with a powerglide and 4.30 gears and a 29.5 tire. The engine is A stock short block with A F cam and trick flow heads. It has gone 11.70s in the 1/5.

Bam

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89Gmcsierra
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PostPosted: Mon Apr 14, 2014 8:54 pm    Post subject: Reply with quote

anyone have any idea how much clearance i have for camshaft. cams screwed. it has no valve reliefs in the pistons. i would like to put a solid cam go away from hydraulic. any ideas for cam?
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Wed Apr 23, 2014 10:43 am    Post subject: Reply with quote

From what I've read anything above 0.500" lift and you could run into trouble. Best thing is to check it.
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89Gmcsierra
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Joined: 28 Oct 2012
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Location: Hazleton, Iowa
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PostPosted: Wed Apr 23, 2014 1:27 pm    Post subject: Reply with quote

This is cam comp said to run im scared its too big.

Exh .564 int .555
exh 250 int 244 duration @ .050
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