Team Chevelle banner

1 - 10 of 10 Posts

·
Registered
Joined
·
364 Posts
Discussion Starter #1
OK Guys, the 454 is out of the 70 Chevelle and on the stand. Lets get our heads together and help me put together a package for the street. In the past I've built a 427 that rattled my teeth and made the steering wheel vibrate up and down about and inch or so, don't want to go that route but I do want all these Mustangs I see on the roads in Birmingham to know what just pulled beside them is something to fear!
All I know so far is that I'm going with some 049 or 781 heads that will be worked by a local speed shop that builds nothing but big blocks, mainly offshore racing engines, his work is great. What cam should I run, 4 or 5 speed will be the trans. rear gears are 3.42 I think or close to that but that can be changed to suit the motor. I'm thinking 9.5 or 10.5 compression, help with intake, carb, the whole package would be great, I want to get this right the first time and be happy with it.
Thanks for the input.
 

·
Registered
Joined
·
13,341 Posts
Have posted this info before in detail but the short version is - 454 .030, built to 10.3/1 CR, using GMPP ZZ502 heads and a CamMotion hyd roller cam [233/236 @ .050, .600/.610, 112LSA/108ICL]. Motor idles at about 900RPM w/ 11-12" vac.. Iron heads. build it for 9.5/1, keep the cam in the same size range. If you keep the LSA at 112 it will have decent vacuum. With either the 049 or 781 head, I would run about 8-10* mre exh duration. My motor is twisting a T400 w/ 3000 stall, but would be equal at home in front of a stick.
 

·
Registered
Joined
·
695 Posts
as far as the intake is concerned i'd definately run an Edelbrock air gap if i were buying new. are you planning on a hydraulic flat tappet cam, solid flat tappet, or some sort of roller? the cam that grn69 mentioned sounds pretty good. alot of lift for the amount of duration at .050.
 

·
Registered
Joined
·
364 Posts
Discussion Starter #6
Planning on a Hydraulic Flat cam, will the Air Gap fit under a stock cowl hood
 

·
In Memory of Harold
Joined
·
1,796 Posts
If you decide on a 9.5:1 engine, use the Lunati 60203 VooDoo 268. Its specs are---268/276 at the seat, 227/233 at .050, .542"/.554" valve lift, and 110 LSA. It works just fine, I've driven this cam in a SBC. it is very strong on the street.
If your CR comes out over 10:1, then use the Lunati 60204 VooDoo 276. Its specs are---276/284 at the seat, 233/241 at .050, .554"/.572" valve lift, and 110 LSA. It is my hydraulic cam of choice for 10:1+ CR BBCs, and is a true street-n-strip cam. This one definitely needs an upgraded fuel system, with 1/2" fuel lines. It is very responsive to the throttle, and everyone will know you have a cam in your car..... Just don't ask me to describe the idle.....
With the right CR, your engine will be happy with either cam, and so will you...

UDHarold
 

·
Registered
Joined
·
364 Posts
Discussion Starter #10
OK, block goes to the machine shop tommorrow, and here's what I'm planning:
454 .030 over
Forged Speed Pro Pistons 10.1 compression shooting for
Lunati 60204 Voodoo 276 cam
Roller Rockers
Double Roller timing chain
Edelbrock Air Gap intake
Holley 850 cfm double pumper carb
HEI Distributor
Aluminum water pump
GM Iron 049 Oval Port Heads with 2.25/1.88 valves
Headers unkown as of yet, help here would be great, the car is low per the pro-touring theme
Keisler 621 bellhousing arrived today, Muncie is being built.
Rear is 3.?? that will change

What horsepower do you think I'm at, maybe 500?
If I go with a Scat stroker kit and punch this thing out to 496 should I change cam, and is 600 hp possible.
 
1 - 10 of 10 Posts
Top