what do you think about this cam
01-28-2016, 05:23 PM
#1
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what do you think about this cam Hi guys new to the site just wondering what do you guys think about this Howards custom grind Cam 560/560 lift 227/233 duration @ .050 l/c 112 with 1.5 roller rocker in a sbc 396 lt1 with ported and polished heads with lt4 intake. Car will be a weekend warrior.Some track time
01-28-2016, 08:20 PM
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the compression ratio is 9:0.1 for boost, either supercharged or turbo not sure yet.And the rear gears not sure of that either just yet. Thats why I'm on the site because I know some of you guys have been there done that and know what works and what doesnt
01-28-2016, 08:57 PM
#4
That cam is alright but more suited to a NA app.
You want overlap to be from -5 to +5. Negative overlap is better for turbos and positive for blowers. The cam you posted has 6 degrees.
Overlap = (Intake duration @.05 + Exhaust duration @.05)/2 - (LSA * 2)
The blower will want a fairly large duration split (8+) favoring the exhaust (eg mine is 226/239). Turbo will want a relatively small duration split or even none at all.
You want overlap to be from -5 to +5. Negative overlap is better for turbos and positive for blowers. The cam you posted has 6 degrees.
Overlap = (Intake duration @.05 + Exhaust duration @.05)/2 - (LSA * 2)
The blower will want a fairly large duration split (8+) favoring the exhaust (eg mine is 226/239). Turbo will want a relatively small duration split or even none at all.
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01-28-2016, 10:00 PM
#10
Mmmmmm............I hope that's LT4 heads to go with that LT4 intake.
NOTE: LT4 intake with LT1 heads (among other things) IS NOT an upgrade!
Also.....if you stay NA with 9.0:1 CR.....not optimal; you'll leave a lot on the table. But that CR is very good for boost.
You can sell the current cam.....and get one with the same lobes but with a 115* LSA (4* advance). That would give you a cam with a 0* overlap
.
Or....just use your current cam anyway. Not an optimal cam but still usable and will save you a few bucks.
KW
NOTE: LT4 intake with LT1 heads (among other things) IS NOT an upgrade!
Also.....if you stay NA with 9.0:1 CR.....not optimal; you'll leave a lot on the table. But that CR is very good for boost.
You can sell the current cam.....and get one with the same lobes but with a 115* LSA (4* advance). That would give you a cam with a 0* overlap
.Or....just use your current cam anyway. Not an optimal cam but still usable and will save you a few bucks.
KW
01-29-2016, 11:18 AM
#12
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Cam isn't optimized for boost but it'd make a decent stick in a NA 350/355 with good heads.
What's the lift on a 1.6 rocker?
For a street-oriented boosted build with 9-9.5 SCR a favorite is the "high lift" version of the XE224/236. It's very proven and makes lots of usable power in a blower application.
What's the lift on a 1.6 rocker?
For a street-oriented boosted build with 9-9.5 SCR a favorite is the "high lift" version of the XE224/236. It's very proven and makes lots of usable power in a blower application.
02-02-2016, 12:09 AM
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Since things seem Mismatched What size Rods You gonna run with that 396 LTx??? 5.85" I hope!!!
You may want to give out the Specs on Everything to get the Best Help!!! Did AI or LE port the stock heads or are they AFRs or Darts??? All that kinda stuff matters when picking the right cam!!! A flow sheet will help Ya get the lift right... Do they flow best at .550 , .650 or .750 isnt a place to really Guess... Soo far the parts Your listing are best for a 355 Carbed or 24X conversion LTx!!! The Guys on here Will try to keep You from makin Expensive OH ***** if Youd Just Ask 1st!!! The Only Stupid Question is the 1 You Dont Ask!!!
You may want to give out the Specs on Everything to get the Best Help!!! Did AI or LE port the stock heads or are they AFRs or Darts??? All that kinda stuff matters when picking the right cam!!! A flow sheet will help Ya get the lift right... Do they flow best at .550 , .650 or .750 isnt a place to really Guess... Soo far the parts Your listing are best for a 355 Carbed or 24X conversion LTx!!! The Guys on here Will try to keep You from makin Expensive OH ***** if Youd Just Ask 1st!!! The Only Stupid Question is the 1 You Dont Ask!!!
02-02-2016, 04:31 PM
#18
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He could swap the injector plugs for 4 and 7. And the spark plug wires.
02-02-2016, 05:46 PM
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Thanks guys 6 inch I beam rods.And a guys named Tommy Gonzalez out in Pa. ported and polished my lt1 heads.I asked the guys about him here in New Jersey at Cartek and they said he 's really good at porting and polishing heads.The Cam was recommended to me from A guy named Scott at Howards cams.