Aluminum Big Blocks?

Reply Subscribe

Thread Tools

Search this Thread

Mar 6, 2002 | 09:21 AM

#21

groovyjay

Thread Starter

Le Mans Master

Joined: Nov 2000

Posts: 8,220

Likes: 208

Re: Aluminum Big Blocks? (Sigforty)

Sigforty: Thanks for the info! :cool: :eek: :cheers:

Mar 6, 2002 | 09:23 AM

#22

groovyjay

Thread Starter

Le Mans Master

Joined: Nov 2000

Posts: 8,220

Likes: 208

Re: Aluminum Big Blocks? (Monty)

QUOTE:"aluminum blocks offer a weight savings and repairability advantage."
Sounds like reason good enough for me!

Mar 6, 2002 | 06:06 PM

#23

VETMANIAC

Racer

Joined: Mar 2000

Posts: 352

Likes: 0

From: Frisco, TX

Re: Aluminum Big Blocks? (555ciC4)

555ciC4,

That sounds like a killer engine you have there. What are the specs on your camshaft? What heads are you running and please give us the details on your Fuel Injection system. Thanks.

Mar 6, 2002 | 08:11 PM

#24

555ciC4

Instructor

Joined: Dec 2001

Posts: 154

Likes: 0

From: Springfield VA

Re: Aluminum Big Blocks? (VETMANIAC)

Cam specs: hydraulic roller, 256/262 @ 50, .657/657 lift and 114 degree lobe separation . Brodix/SAR BB-2X CNC heads. http://www.sonnysracing.com/engines_may_2001.html has more details,

SAR STREET/STRIP
555 CHEVY - 1X4 700 HP
DESIGNED TO RUN ON 93 OCTANE PUMP GAS,
9.5 TO COMPRESSION
CROSS COUNTRY ENDURANCE

See http://www.fuelairspark.com/ for EFI info. Mine is sequential with individual Cylinder Fuel and Spark Control.

[Modified by 555ciC4, 12:42 AM 3/7/2002]

Mar 7, 2002 | 12:14 PM

#25

VETMANIAC

Racer

Joined: Mar 2000

Posts: 352

Likes: 0

From: Frisco, TX

Re: Aluminum Big Blocks? (555ciC4)

How does the engine idle with that camshaft? What RPM does it idle at and how much vacuum is it pulling at idle? Is that a Crane Camshaft? I noticed that the specs @ .50 are similar to a Crane profile but the lift is greater. Are you running greater than 1.7 to 1 rockers? I am curious what spring pressures you have closed and open and how well the Hydraulic lifters are holding up to that much lift. Which lifters are you running? Also, can you run the F.I. in closed loop or must it remain in open loop? I know this is a lot of questions but I would appreciate the info since I plan on a future cam change and switch to F.I. for my 540. Thanks for all of the info.

Mar 7, 2002 | 12:43 PM

#26

555ciC4

Instructor

Joined: Dec 2001

Posts: 154

Likes: 0

From: Springfield VA

Re: Aluminum Big Blocks? (VETMANIAC)

It idles between 650 and 850 rpms with 8-10 inches of vacuum. My power brakes still work as stock. Custom grind, I think that told me it was Comp Cams. Yes, 1.7 rockers. Not sure of spring pressure or lifters. I run closed loop and speed density.