Carb advice for new BBC combo
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From: Allen TX
Re: Carb advice for new BBC combo (Corey 68)
Maybe I'm chickening out with the smaller cam, but I believe I'll still be in the 420-430rwhp range with it, and I may spray it later if I feel the need for more power.
I understand where you are coming from. I went conservative with my cam (solid 248/248 @ .050) so it will behave on the street. To compensate I will have at least a 200hp shot os N20 for when I want to "play". :reddevil
I understand where you are coming from. I went conservative with my cam (solid 248/248 @ .050) so it will behave on the street. To compensate I will have at least a 200hp shot os N20 for when I want to "play". :reddevil
And the nitrous...well, it works great on my Z06. ;) I don't use it often at all, so I really like it b/c its there only when I need it and the car is plenty fast the way it is. On this roadster, I think 420-430rwhp N/A is going to be plenty of power and I'm just hoping to keep the driveline from nuking itself (no slicks or sticky tires).
Just another reason the smaller cam will probably suit me just fine for this particular application.
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From: Corsicana, Tx
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Re: Carb advice for new BBC combo (WA 2 FST)
I'm definitely for the 244 cam at least. I had a Comp 244@ .050/.623 single pattern street roller in my 427 on 110 LSA. It peaked at 5850 on the 427, yet pulled easily to 7000 rpm.
It held 14" of vacuum, and would lug to 1000 rpm in 5th gear ( same as you...Doug Nash 5 speed with 3.36's).
And remember, this was with a 1050 Dominator and a single plane intake!
On a 454, that small cam is going to be leaving way too much on the table and the larger cam can provide the manners. Now granted, the 244 cam I had was a solid, so that makes it act like a hyd, with 5-8* or so less duration. But you have a 1/4" longer stroke, a dual plane intake, a 4150 carb, and better heads.
And if you're changing carbs, go with the 950 HP. Or one of the Bill Mitchell, Carb Shop, Da Vinci or others that flow 1020 or so. Can't hurt and will have very sharp response. For sure stay with Double Pumpers.
Check out Edelbrock's site for some neat Tech reading on carb sizing. But don't use their carb....works great, but too ugly to put on a motor unless you have two of them! Also remember, dual planes like more CFM.
JIM
It held 14" of vacuum, and would lug to 1000 rpm in 5th gear ( same as you...Doug Nash 5 speed with 3.36's).
And remember, this was with a 1050 Dominator and a single plane intake!
On a 454, that small cam is going to be leaving way too much on the table and the larger cam can provide the manners. Now granted, the 244 cam I had was a solid, so that makes it act like a hyd, with 5-8* or so less duration. But you have a 1/4" longer stroke, a dual plane intake, a 4150 carb, and better heads.
And if you're changing carbs, go with the 950 HP. Or one of the Bill Mitchell, Carb Shop, Da Vinci or others that flow 1020 or so. Can't hurt and will have very sharp response. For sure stay with Double Pumpers.
Check out Edelbrock's site for some neat Tech reading on carb sizing. But don't use their carb....works great, but too ugly to put on a motor unless you have two of them! Also remember, dual planes like more CFM.
JIM
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Re: Carb advice for new BBC combo (427Hotrod)
Go with the bigger cam for sure, 232 at .050 is too small for a 454 like yours. I understand your delima with the compression, but with the great heads you have it will make up for some of the DCR you are losing due to the lower compression.
