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89Gmcsierra Member
Joined: 28 Oct 2012 Posts: 65 Location: Hazleton, Iowa 2274.42 points
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Posted: Mon Jan 27, 2014 2:14 am Post subject: 302 build |
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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 PostMaster

Joined: 30 May 2002 Posts: 3172
65175.84 points
1979 Chevrolet Camaro
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Posted: Mon Jan 27, 2014 2:32 am Post subject: |
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Put a 5.3 ls motor in it. _________________ Stop running from your pain and embrace your pain. Your pain is going to be a part of your prize.
I challenge you to push yourself. |
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clay Moderator

Joined: 24 Nov 2002 Posts: 3209 Location: South Carolina 318129.23 points
1972 Chevrolet Nova
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Posted: Mon Jan 27, 2014 11:09 am Post subject: |
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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 _________________ I have done so much with so little for so long, I can now do anything with nothing. |
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Big Dave Moderator

Joined: 04 Dec 2005 Posts: 2663 Location: Tampa Florida 120538.84 points
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Posted: Mon Jan 27, 2014 11:40 am Post subject: |
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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 Member
Joined: 28 Oct 2012 Posts: 65 Location: Hazleton, Iowa 2274.42 points
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Posted: Mon Jan 27, 2014 11:54 am Post subject: |
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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 Member

Joined: 15 Aug 2002 Posts: 2454 Location: Townsend, Mass. 83266.64 points
1971 Chevrolet Chevelle
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Posted: Mon Jan 27, 2014 1:21 pm Post subject: |
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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. _________________ 2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N/A
6.59@104.03 MPH 1/8mi
10.40@127.73 MPH 1/4mi
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SMOKEmUP PostMaster

Joined: 30 May 2002 Posts: 3172
65175.84 points
1979 Chevrolet Camaro
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Posted: Mon Jan 27, 2014 5:29 pm Post subject: |
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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. _________________ Stop running from your pain and embrace your pain. Your pain is going to be a part of your prize.
I challenge you to push yourself. |
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89Gmcsierra Member
Joined: 28 Oct 2012 Posts: 65 Location: Hazleton, Iowa 2274.42 points
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Posted: Sat Feb 01, 2014 4:09 pm Post subject: |
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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 Member

Joined: 01 Sep 2003 Posts: 5579 Location: grassvalley, ca 71896.24 points
1933 Willys Coupe
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Posted: Sat Feb 01, 2014 8:02 pm Post subject: |
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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 Member
Joined: 28 Oct 2012 Posts: 65 Location: Hazleton, Iowa 2274.42 points
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af2 Member

Joined: 01 Sep 2003 Posts: 5579 Location: grassvalley, ca 71896.24 points
1933 Willys Coupe
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Posted: Sat Feb 01, 2014 10:04 pm Post subject: |
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That is what I was saying... |
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William Jones Member

Joined: 30 Jan 2006 Posts: 826 Location: Lake city, FL 28640.90 points
1971 Ford Mustang
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Posted: Wed Feb 12, 2014 4:47 pm Post subject: |
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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 _________________ Take the horse out off the barn and let her RUN BABY RUN!!!!!
92 LX 454ci Clevor 9.24@142.53 N/A
71 Mach1 454ci Clevor 10.16@134 N/A 3850lbs race weight "Lost in fire"
03 Cobra Bone stock 12.42
68 Falcon 363ci 10.55@126 N/A
95 GT 363ci 11.08@118 N/A |
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89Gmcsierra Member
Joined: 28 Oct 2012 Posts: 65 Location: Hazleton, Iowa 2274.42 points
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Posted: Mon Apr 14, 2014 8:54 pm Post subject: |
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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 PostMaster

Joined: 30 May 2002 Posts: 3172
65175.84 points
1979 Chevrolet Camaro
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Posted: Wed Apr 23, 2014 10:43 am Post subject: |
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From what I've read anything above 0.500" lift and you could run into trouble. Best thing is to check it. _________________ Stop running from your pain and embrace your pain. Your pain is going to be a part of your prize.
I challenge you to push yourself. |
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89Gmcsierra Member
Joined: 28 Oct 2012 Posts: 65 Location: Hazleton, Iowa 2274.42 points
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Posted: Wed Apr 23, 2014 1:27 pm Post subject: |
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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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