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455 build

Old December 10th, 2018, 10:26 AM
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455 build

I have a 455 with C heads that I just picked up. It currently has an unknown cam that was referred to by the PO as an "RV cam". The block was bored to .030 over and has a set of +40.3cc soup bowl pistons. The deck is at factory height and the heads appear uncut and have a fresh valve job. It has the nodular crank that was turned .010 and the rods have been reworked. I also have an Edelbrock Torker intake for it.
It will be going into a 1972 Supreme and paired with a freshly rebuilt TH350 (all new seals, 5 intermediate clutch pack, hardened sprag, etc) and a 3.42 rear end. I want to be around 375-400HP and 500ft lbs of torque. I am thinking I would like to be around 9.75:1 (maybe close to 10:1 if it will still run on 93). I will be cc-ing the heads this week so I know EXACTLY where I am at to this point.
Here is what I am looking for suggestions on:
Piston?
Cam? (I want it to behave on the street, but have "an edge" to it)
Keep the Torker intake or go with the performer?
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Old December 11th, 2018, 11:48 AM
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Heads cc out at 82cc. I think I am going with the following piston.

http://www.vigilanteparts.com/Olds_4...is-pts537a.htm
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Old December 11th, 2018, 01:51 PM
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Originally Posted by ajr2820 View Post
I have a 455 with C heads that I just picked up. ...
Cam? (I want it to behave on the street, but have "an edge" to it)
Keep the Torker intake or go with the performer?
Unless you are planning to bullet proof the valve train and do lots of high RPM, I'd suggest the performer. Get a matching cam that has max power through 5500 rpm and no more than a 750 or 780 CFM carb or FI if you've got the $$$$$.

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Old December 11th, 2018, 04:21 PM
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830 or 850 Quick Fuel carb, Performer intake and an Erson TQ40. You’ll hit all your marks with that combo.
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Old December 25th, 2018, 04:55 AM
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I went with the Wiseco Pro Tru piston +15.0cc and a set of Speedmaster H-beams. I figured getting the old rods separated from the current pistons and reworked for a floating pin...might as well just get new rods. Sent the rotating assembly out to be balanced.
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Old January 19th, 2019, 06:57 AM
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OK. Got everything balanced and ready to start assembly. So I calculated the compression at 9.87:1 and based on the TQ40 specs the dynamic compression will be 7.45:1 based on the intake hitting the seat at 72 deg ABDC. Should I advance this cam to get a bit more cylinder pressure? I will be running the car on 93. If so, where is the line where I would be flirting with detonation? This will be a street car so losing some on the high end is not a big concern.
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Old February 9th, 2019, 06:26 AM
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I'm about to start assembling this week. This is what I am working with:

455 F Block bored 0.030" over
Nodular crank
Speedway H-beam rods (stock length)
Wiseco pistons +15.0cc (0.010 below deck)
C heads- AIR bum removed,lightly ported with some bowl work
Compression ratio calculated at 9.91:1
Erson TQ40 cam (220/[email protected] 110cl)
Edelbrock Torker (may switch for a dual plane later, but am going to see what I get with this one since I have it)
Headers (still need to purchase)
Carb (undecided.I have access to quite a few through a friend and will test quite a few before I make this decision)

Will be paired with a TH350 with a 2400 stall convertor and 3.42 limited slip rear.

I hope to have it on the dyno sometime in March to try out different carbs and possibly even a dual plane if I can get my hands on one for testing purposes. Any guesses to the numbers this combo will put up?
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