www.ryanscarpage.50megs.com/combos1.html Check this site out. Has a lot of comparisons using different head and cam combo's for street engines. Aluminum heads allow you to run more compression with lower octane fuel, better cooling, less weight.

 

Okay let me get this right!
Vortec Heads (stock)?
Preformer Intake
A Cam with somewhere in the 450 lift and no more duration that 270
Timming Chain Set
Roller Rockers
Rebuild my QJet
Should give me 350HP?

How about Dart Iron Eagle or World Sportsman2 Heads?
I found some World Product Sportsman 2 Heads for $600.00 would it be worth it over the vortec?

 

world has a 58cc head that would help more with your dished pistons.
170 runner 202/160 valves 58cc chamber WRL-042650-1
1.250 valve springs

 

I am using the World Product Sportsman 2 on my build, but I am not done with it yet. From my understanding, I believe they are similar to the Dart heads and, at one time, were manufactured by the same company.

The World Product heads flow better than the Vortec heads, but they also have a 200cc runner, rather than the smaller 170?? on the Vortec. The 200cc runner may be too big for your application unless you also are going to change pistons.

 

So I've looked and found these tell me what you all think and how much HP they will make and if it is god for me?

*Comp Cam/ Lifters/ Timing, Hydraulic Flat Tappet, Advertised Duration 265/ 269, Lift .442/ .465, Chevy, Small Block. $207.95
OR MORE CAM?
*COMP Cams Pushrod Guideplates $22.88
*Pushrods Heat treated set 16 $34.99
*!.5 Roller Rockers $155.00
*Upgraded Vortec Head Kit, Edelbrock Performer Intake with gaskets, bolts. This kit features our upgraded Vortec heads which have been modified to accept our high performance Z28 valve springs with lightweight LT4 retainers. This produces a high reving cylinder head that can handle up to 0.525" lift hydraulic camshafts. An Edelbrock Vortec Performer intake manifold is matched with this kit for optimum performance. $995.95
Total $1416.77

Along with my TH400, 3.55 rear 2 1/2" true duals with Dynomax Ultra Flo mufflers and rebuilding my Qjet or a Holley 600. $269.95

I'll need some center bolt valve covers hep me there.

So Let Me Hear It!

 

What is the duration at .050 on that cam? You have to worry about duration with the stock converter.

 

This is the spec for the cam.

Description
Cam/ Lifters/ Valvetrain, Hydraulic Flat Tappet, Advertised Duration 262/ 270, Lift .462/ .469, Chevy, Small B...
Advertised Duration
262 int./270 exh.

Advertised Exhaust Duration
270

Advertised Intake Duration
262

Assembly Lubricant Included
Yes

Basic Operating RPM Range
1,300-5,600 RPM


CARB EO Number
-

Cam Style
Hydraulic flat tappet

Camshaft Gear Attachment
-

Computer Controlled Compatible
No

Duration at 050 inch Lift
218 int./224 exh.


Exhaust Duration at 050 inch Lift
224

Exhaust Valve Lash
0.000 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio
0.469 in.

Footnotes

Gaskets Included
No


Grind Number
CS XE262H-10

Intake Duration at 050 inch Lift
218

Intake Valve Lash
0.000 in.

Intake Valve Lift with Factory Rocker Arm Ratio
0.462 in.

Lifter Style
Hydraulic flat tappet


Lifters Included
Yes

Lobe Separation (degrees)
110

Locks Included
Yes

Notes
-

Outside Diameter of Outer Spring (in)
1.254 in.


Pushrods Included
No

Quantity
Sold as a kit.

Retainers Included
Yes

Rocker Arm Style
-

Rocker Arms Included
No


Timing Chain Style
Double non-roller

Timing Chain and Gears Included
Yes

Valve Lift with Factory Rocker Arm Ratio
0.462 int./0.469 exh. lift

Valve Springs Included
Yes

Valve Stem Seals Included
Yes

 

I think you need more cam with your compression and a 3.55 gear. Especially with iron heads your DCR could be too high with a 218 intake duration @ .050. Need to check it and try to tighten up the quench with a steel shim head gasket to avoid detonation. The XE 268 H might work better and I think it will be fine with a stock convertor and a 3.55.

 

Check your selection of roller rockers with the hydraulic cam you listed above...

What you have above, but with hydraulic lifters and a comp cam XE268 is the setup I have...Just got it back on the road after the rebuild recently. I am still adjusting the timing and the carb, but I love it!!! The tires start spinning when I drop the clutch at about 1800 RPM!!!

The center bolt valve covers with the Chevy Bowties on them will run you about $100 new, or go to the junkyard or ebay and find them cheaper!!!

Good Luck!!!

 

These ZZ4 heads are for sale, I have nothing to do with this sale just thought you might want to check them out.

http://forums.corvetteforum.com/show....php?t=1662332

 

when i went through this a month ago these are what I landed on

tim

 

If your rocker arms are in good shape use them changing to
1.5 roller rockers on an engine with very low spring pressure
hydraulic cam springs is just a waste of your money. Your
750cfm Q-jet will more then do the job, if you want to go to
a holley get the 670 avenger, vacumm carbs work well on
modest cammed engines and auto trans.

 

Have you verified with Edelbrock that the Performer Intake will fit under your stock hood? While putting together equipment list, I seem to recall a problem but it might not have been that model.

 

From what I've read here on the forum and been told the Preformer will fit under the hood. But not the Preformer RPM I hope I'm right maybe someone will reply for sure.

 

Edelbrock tech support has gotten a lot of grief in various posts lately. I shot them several emails and always got replies within 24 hours. Trying to get through on the phone was useless. You might try asking them.

I just did some searching through old emails and it was the RPM Airgap manifold with a Q-Jet that wouldn't fit.

 

I am quoting directly from the '07 Edelbrock catalog I picked-up 2 weeks ago at the Gatornationals.....

PERFORMER #2101, carb pad height: 4.05" (3.50" @ front, 4.60" @ rear)

PERFORMER AIR-GAP #2601 & #2604, carb height: 4.32" -
Will not fit under stock Corvette hood

PERFORMER VOTREC #2116, carb pad height: 4.57" -
Will not fit under stock Corvette hood

PERFORMER RPM AIR-GAP #7501, carb pad height: 4.72" -
Will not fit under stock Corvette hood

PERFORMER RPM #7101, carb pad height: 4.72" -
Will not fit under stock Corvette hood

Of the above listed intakes Edelbrock is telling us, in their-own catalog, that ANY RPM, vortec, or Air-Gap intake won't work with a stock Corvette hood, while no mention of clearence-problems is made regarding the 'straight' Performer intake, #2101:
if someone can get a carb-pad height dimension from an intake that DOES clear their stock hood, we'd know what pad-height is acceptable.

 

What do you think if I put the Vortec Head and intake set up on my 77 with 1.6 rockers and headers and a stage 2 Q-jet carb with out the cam? And then when my engine needs to be rebuilt do the whole thing cam flat top pistons etc. Would this help me with HP or do you think it would not be worth it.
Thanks for the help.

 

What do you think if I put the Vortec Head and intake set up on my 77 with 1.6 rockers and headers and a stage 2 Q-jet carb with out the cam? And then when my engine needs to be rebuilt do the whole thing cam flat top pistons etc. Would this help me with HP or do you think it would not be worth it. What kind of HP increase do you all think?
Thanks for the help.

 

I think the L48 cam in a '77 is too wimpy to make it worth while...if you are going to do the heads, do the cam!!! Plus, then what are you going to do, reuse all of your old, worn out lifters? If so, keep them in order!!!

I know that the Performer manifold fits under my '77 hood with a drop base air cleaner...I was told the Performer RPM does not fit, ergo why I didn't get one...

Good Luck!!!

 

On the Summit sight I found Brodix 11sp x, 11 std x and 18 degree heads. Which of these are the 1K 180/64 youall are referring to.
Don