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Author Topic:   cam change
the last dive
Gearhead

Posts: 147
From: sydney australia
Registered: Dec 2001

posted 05-04-2002 11:13 AM     Click Here to See the Profile for the last dive     Edit/Delete Message   Reply w/Quote
if i was to change from my current cam(294s)and change it to a(282s) where would it start working and stop? current cam starts at 3500.

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the last dive
Gearhead

Posts: 147
From: sydney australia
Registered: Dec 2001

posted 05-04-2002 11:37 AM     Click Here to See the Profile for the last dive     Edit/Delete Message   Reply w/Quote
is it possible to increase the hp of my engine by downsizing my cam?or would i loose hp?what would be the contributing factors in loosing hp with a smaller cam?or increasing hp with a smaller cam?

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n2oMike
Gearhead

Posts: 1547
From: Spencer, WV
Registered: Jan 2001

posted 05-04-2002 12:18 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
You need to supply more information about the engine (size, compression, heads, intake, carb, headers), converter, car weight, gear, etc. You also need to include the maximum rpm you are comfortable with, as well as the intended usage of the vehicle.

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220

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the last dive
Gearhead

Posts: 147
From: sydney australia
Registered: Dec 2001

posted 05-04-2002 09:16 PM     Click Here to See the Profile for the last dive     Edit/Delete Message   Reply w/Quote
n20 mike, its a 347 10.1comp,match ported inlets cleaned up runers and bowls,ported exhaust(dont have flow figures)quad webers 44mmidf,1 3/4 4 into 1 headers 2.5pipes,4.1 diff,tremmec 3550,3000lbs car weight,6500allday 7000maxrpm,some street,circuit,and 1/4 its an allrounder thanks dave

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n2oMike
Gearhead

Posts: 1547
From: Spencer, WV
Registered: Jan 2001

posted 05-05-2002 11:17 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
Sounds like the cam you have is about right for turning 7k rpm. The 282S would make more midrange, but would be all done by around 6300 rpm in your 347. If you are needing more midrange, go with the smaller cam, otherwise, the 294S should make more power (as long as you've got the heads to support that rpm with your stroker) It's going to want to breathe, and will need a good set of heads to take advantage of that cam and rpm. If you don't have the heads, you're wasting your time with the big cam... about the time it decides to come alive, the heads will be all done. It won't be worth a sh*t at low rpm (because of the big cam) and it won't be worth beans up top (due to the restrictive heads)

If you want to spin the thing 7k and have the heads to handle it, by all means, use the larger cam. It might be a little soggy at low rpm's with the 10:1 compression, but should still work well up top.

It would benefit from 3" exhaust. If you want it to be quieter on the street, weld a set of header collector rings to the outlets of the 3" mufflers, then use header reducers to connect to the tailpipes. This way they can be removed for those 'special occasions'.

Good Luck!

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220

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the last dive
Gearhead

Posts: 147
From: sydney australia
Registered: Dec 2001

posted 05-06-2002 04:37 AM     Click Here to See the Profile for the last dive     Edit/Delete Message   Reply w/Quote
n2o mike....the heads i have are dart senior alloy, are these up to the task??

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n2oMike
Gearhead

Posts: 1547
From: Spencer, WV
Registered: Jan 2001

posted 05-06-2002 11:25 AM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
Yes

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220

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