I am building up a 402 and was wondering what you all thought I should use for a cam and carb. The engine is a .60 over 402 with "I think stock Pistons" and 3931063 heads. what do you think would give me the best results. I'm not going to drag race this thing just want it street powerful.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=34202&item=2446683061

this is how I got engine.

Steve

Ill help ya out all i can, im currently building a 402 also, but mine is 20 over not 60. For most street applications the Edelbrock RPM air gap is a popular manifold right now. I plan on using a 750 holley double pumper. My cam is a Comp Cam 274-280 duration cam. lift is 568 578. SHould be fairly loppy idel but not terrible for driving around town. My heads are 290 casting numbers, ive had the 2.19 1.88 valves put in with gasket matched ports. my engine builder is estimating about 450-475 hp or so. Anything else i can help ya with let me know. Ive used alot of the suggestions of the people on this board in making my combo

We need a lot more info here Steve to help you out. First of all what gear are you running,is it stick or auto,if auto which trany,what exhaust are you running,stock cast ex maniflds,headers,etc.

And also you need to be more specific on the cars usage,weekend/saturday night cruiser or daily use,how much perf are you really looking for (H/P & TQ),and so on.

Scott

also i looked up your casting #'s on your heads. Shouldnt be to hard to get decent compresion out of it. I had to buy differnt heads, mine were huge 292 cast number i think, open chambered. hard to get any compresion out of them. the 290 made it possible to get 9.5 comp or so. if anyone is intrested in my 292 heads let me know. i dont need them.

I want my car to be mainly for saturday cruisin and local car shows and maybe a pass or two at the track to see what itll do. I dont want to tear the engine down every six months. I have 3.31's right now I have a brand new worked turbo 400. I have 2'1\2 flowmaster 40 series with a x over. I'm hoping for 375-450 hp. Thanks for the help

Steve

Hey Steve,

I am running a 402 now 396 +.030". I chose the Edelbrock Performer RPM setup, that is cam, intake, and 750 carb. I am running a 3 in. x-pipe off my headers into Flowmaster 50 series mufflers and 2.5 in. out the mufflers. The car is very streetable, has a lopey, but managable cam, & good vacuum for the brakes. I am running an L-35 block with the stock closed chambered heads. I ran a different piston, Speed-Pro forged, which dropped the compression down to about 9.5:1.

With my current setup, I would say I'm in that 375-425HP range with a very forgiving setup. I have not had it dynoed yet, but using Desktop Dyno, and talking to a few people, Edelbrock included, they all said I'm right in that neighborhood.

BTW, rear end is a 12-bolt 3.73 POSI and trans is Muncie M-20.

402 +.030 = 408CI

10.2/1 Comp [.016 Deck Ht, .022 Gasket, 100 CC Head]
GM 290 Heads, Currently getting 2.19/1.88 valves installed, mild port work
Hydraulic Roller 228/238 @ .050 .578/.578 lift
Weiand Excelerator - Port matched
770 Holley Vac Sec.
GM HEI - recurved
Hedman 1-3/4" Primaries / 3" collectors
2-1/2" mandrel exh into Dynomax Hemi Turbos
12 bolt - 3:73's Easton Posi

Est - 440 - 450 HP
Hope to run in the 12's on street tires.

1971 402 bored .040 over (410 CI)
1971 GM 063 Closed heads 2.19 Intake 1.72 exhaust
Flow #'s @ 600 Intake 298 exhaust 205
Static Compression Ratio 9.48:1
Combustion chamber: 100cc
6223 cross drilled crank
1.72 comp cams rockers
Comp Cams xe284H 110 lsa
matching springs retainers etc.
Eagle I-beam Forged rods
Speed Pro forged 10:1 pistons
Edelbrock RPM airgap
Holley 4160 750cfm carb.
1.75" long tube headers into 2.5" H-pipe exhaust
700-r4 transmission with 2700 stall
12 bolt rearend Auburn posi with 3.73 gears

This combo was good for +500 hp and +500 tq

Thanks,

Steve Haraway
1971 SS396

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Steve Haraway
1971 Chevelle SS
http://www.chevelles.com/showroom/USFATL/8-24-03.JPG
http://www.chevelles.com/showroom/USFATL/8-24-03-3.JPG
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http://www.chevelles.com/showroom/USFATL/8-24-03-7.JPG

Steve. I REALLY like your car for some reason ! ;) (see pic below) graemlins/thumbsup.gif

Tom,
You stole my garage! Bring it back now (with the car in it ;) )

Regards,