What is a good combo for a 350? I found this combo from edelbrock http://www.edelbrock.com/automotive/7101pp.html . I was wondering if there are any better ones? I wonder how much better afr and tfs heads flow compared to the edelbrocks. Does anyone have a better street combo?
What kind of difference in hp would there be from a 9 to 10 cr?

Does anyone have any experience with the holley packages? http://www.hotrod.com/techarticles/91718/


[Modified by lostpatrolman, 3:17 AM 5/19/2004]

 

Depends on the rear end ratio & trans type. If it's for an auto with a 3.08, you are stuck with a smaller cam. :sad: Like an XE 262 with 180 heads.

 

You need a manual trans. or higher stall converter if auto.
http://ganeys.home.sprynet.com/CRatio.JPG

I suppose this chart needs some explanation. It shows the increase in power in % of a C/R increase. EXAMPLE: If the original CR is 9:1 on right of chart & it is increased (A line) to 12:1 (B line) on left of chart, then the increase in power is about 4.5%. If the power is increased from 9.0 to 10, the increase is about 1.7%.

 

Summit sells some Trick Flow packages that look pretty nice. I am running a set their heads on both my Formula and Vette and am pretty happy with them.

 

I vote for the holley with 20 degree heads, and like the article said just step down on the cam from the wild street. 355 ci chevy's start to loose being a all around fun driver when you start exceeding 425-430 hp.

I would also try for at least 10.5 compression with aluminum heads.

 

I am running a manual and 3.36 gears. Gkull, how far should i step down for the cam? What kind of numbers do you think it would pull?

 

here is a site that I have posted a number of times http://www.ryanscarpage.50megs.com/combos1.html

 

wow, that site has alot of combos. Too bad there are no graphs

 

http://www.holley.com/HiOctn/ProdLin...K/300-503.html

From your Hot Rod link article I couldn't figure out comparisions to the above Holley site.

But anyway 235/240 degrees with a H-Flat cam is way hot IMO That's how the hot rod guys got 461 hp. I just don't think that it's good to have motors that produce max hp over 6000 rpm. It's to close to red line. I would substitute something like the Crane Power Max 278

 

The basic rpm is deceptive. That just kind of tells you where the power is. With my old 355 ci I turned 7000 rpm all the time and it was a consistant 12.70 second car with 3.55 gearing.

Part Number: 113801 Grind Number: H-278-2 (REPLACES HMV-278-2)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8 GOOD IDLE, DAILY PERFORMANCE USAGE, MILD BRACKET RACING, 3000-3400 CRUISE RPM, 9.5 TO 10.75 COMPRESSION RATIO ADVISED. BASIC RPM 2500-5500
Engine Size Configuration
262-400 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 3114 @Valve 467 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3294 @Valve 494
Rocker Arm Ratio 1.5

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 26 BTDC 72 ABDC 278 °
Exhaust 80 BBDC 30 ATDC 290 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99848
Loads Closed 105 LBS @ 1.700 or 1 45/64
Open 280 LBS @ 1.240
Recommended RPM range with matching components
Minimum RPM 2500
Maximum RPM 5500
Valve Float 6500

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 2 BTDC 40 ABDC 109 222 °
Exhaust 56 BBDC (2) BTDC 119 234 °

Here is the crane cam link
http://www.cranecams.com/?show=brows...tType=camshaft