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Old 04-17-2012, 06:00 PM
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Which cam would be best???

Hey guys got a decision to make. I got a rebuilt stockish 355 shortblock. I wanted to go with a hyd roller retro-fit style cam. I want a street but decent track cam. Id say 70street, 30% track or stop sign neck ringing. I dont want to have to rev. it over 6100rpm in doing so that often. I have a rpm(edl) airgap intake , 2.02 1.06 aluminum heads. The 2 cams i have my eye on are Lunati 10020 Bare Bones PART
NUMBER 10020
RPM
Range 1800-5800

276 286 218 228 0.503 0.503 112

an
HRS-110325-10 (Howards)

2200-5800 operating range

278 286 225 233 0.525 0.530 110


200r4 trans shft kit came with a 2100 stall (But willing to swap out stall if need be). I wanted to go a different direction when it came to the Carb. Wanted to go with a QF carb which one do yall think is good for either cam an why?
THE 680 CFM or the 735 Cfm. Also any adivce on the rearend is appreciated as i have not got to that part yet. Going in a g-body car. Thanks

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Old 04-17-2012, 08:39 PM
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I like the Howard's and here's why.......

The LSA is tighter!(110)
Tighter LSA usually gives better low end jump.
I would advance it 4/6 degrees also for more useful torque.
You said you wereNOT interested in winding it high so this will move the power band a little lower.
Missed the CR part........9:1 or better will work better with cam.
6sally6
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Old 04-18-2012, 06:39 AM
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10.1 cr 64cc heads. So you dont think the Howards cam is to big for a 355??? I see it has a nice amount of lift. Which carb would be the best? can i go with 680 cfm?? or the 735 cfm?? I see that most people normally use 750 cfm carbs on there higher perfromance SBC. Do I still need all that carb? Y is it that all test done always show them being tested with 750s? Are the bigger carbs good for more top end? I have read stuff saying that smaller is better some times? Which would u suggest an why?
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Old 04-18-2012, 11:04 AM
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I would go with the smaller carb(although there really isn't a lot of difference in size) More CFM's in carbs usually help top-end and CAN...hurt bottom(if too big)
You'll be fine either way.
Don't worry about the Howards being too big. For a roller(they can use about 15*more intake/exhaust than a comparable flat tappet...ie...FT cam with 225 duration will be more radical than a 225 duration RT.)
Since you won't be using a bunch of top-end RPM's stick with the smaller carb.
6sally6
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Old 04-18-2012, 03:15 PM
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Should i do any match porting??? What gear would work go for this setup???
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Old 04-19-2012, 08:35 AM
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I've read/heard that "port matching" doesn't really yield much of an increase in HP unless there is a huge mis-match.
Then again.....other guys claim its worth it. Don't see how it could hurt though.
IF the tranny has an O/D gear then a ratio of ....3.50/3.73 would really "liven" your ride!
Also.......will "lighten" your wallet too. Everything has a cost,ya know!
For a weekend play-purty....what-da-heck!!
If tranny is only a 3-speed.....I wouldn't go more than 3.50:1
6sally6
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Old 04-19-2012, 10:35 PM
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Reguardless of what cam you choose from those two get some 4.10's for your G body .Then you will get some stop light respect.

The OD will tame the 4.10's for cruising.

A 245MM 3200 high stall converter w lock up will aid either cam.

www.converter.com
www.converter.cc

Getting the gear ratio right is more critical than the choice-difference between those two cams.
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