Heads to match Edelbrock 2101 Performer Intake
Thread Starter
Instructor
Joined: Apr 2009
Posts: 160
Likes: 5
From: Gorey Ireland
Heads to match Edelbrock 2101 Performer Intake
Having to take the heads off the 'vette in order to put a new set of valve seals in, so kind thinking that maybe I should now look at replacing the stock heads for something with a bit more power.
I was looking to go the Vortec road, but I believe these will not fit with the Edelbrock 2101 intake manifold.
Anyone got any suggestions on what else I could opt for? I have a 76 350 L-48 auto.
Thanks in advance
I was looking to go the Vortec road, but I believe these will not fit with the Edelbrock 2101 intake manifold.
Anyone got any suggestions on what else I could opt for? I have a 76 350 L-48 auto.
- The carb is still a stock Rochester - but I'm going to get this rebuilt before I opt for a new one.
- Edelbrock 2101 Performer Aluminium Intake Manifold
- Dynamax BlackJack Aluminium Coated Headers (85008)
- Taylor Pro-Glo ignition wires (78351)
- custom stainless free flowing exhaust (no boxes, and no cat)
Thanks in advance
Last edited by V8 Stingray; Jul 5, 2009 at 04:41 PM.
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
I jst went with the new Aluminum Edelbrock E-streets, 64cc chambers, gonna boost your H/P about 100. love them.
http://www.edelbrock.com/automotive_...e-street.shtml
http://forums.corvetteforum.com/c3-t...46833-why.html
http://www.edelbrock.com/automotive_...e-street.shtml
http://forums.corvetteforum.com/c3-t...46833-why.html
Thread Starter
Instructor
Joined: Apr 2009
Posts: 160
Likes: 5
From: Gorey Ireland
I jst went with the new Aluminum Edelbrock E-streets, 64cc chambers, gonna boost your H/P about 100. love them.
http://www.edelbrock.com/automotive_...e-street.shtml
http://forums.corvetteforum.com/c3-t...46833-why.html
http://www.edelbrock.com/automotive_...e-street.shtml
http://forums.corvetteforum.com/c3-t...46833-why.html
I thought you would only get 30/40 from changing the heads...
Other than the heads, do I need to buy anything else? i.e. rockers, valves... I've just got a friend to order new head gaskets as well - from looking at your post there is obviously a bit of matching here to do in order to get it right.
8th Gear
Joined: Jan 2007
Posts: 8
Likes: 0
super chevy or chevy high performance did an article a few months back doing a test on all the aftermarcket heads maybe you can look it up on the net I think the AFR`s were the best for my engine but do your homework & plan ahead for any future engine modifications
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
Your stock H/P was 165, i believe, if you match your components right, you'll pick up 150 HP, over stock, probably 120 over what you got now. 
The low compression along with dog iron heads, 76cc chambers and terrible flow with small valves. go for it! (i did, am very happy) 
The low compression along with dog iron heads, 76cc chambers and terrible flow with small valves. go for it! (i did, am very happy)
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Without a budget this is a "how high is up" question 
There's no way a stock L-48 is going to pick up 150HP from a head swap. Certainly it's a good foundation that with the right cam you can see a nice HP boost. Certainly 1HP/CID at the flywheel with the right choices.
Note that 165HP is SAE NET not at the flywheel.
There's no way a stock L-48 is going to pick up 150HP from a head swap. Certainly it's a good foundation that with the right cam you can see a nice HP boost. Certainly 1HP/CID at the flywheel with the right choices.
Note that 165HP is SAE NET not at the flywheel.
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Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Flow data here:
http://users.erols.com/srweiss/tablehdc.htm#Chevy
A cam change and a set of AFR 180 eliminators is the hot ticket.
Dynoed combinations here:
http://www.ryanscarpage.50megs.com/combos1.html
http://users.erols.com/srweiss/tablehdc.htm#Chevy
A cam change and a set of AFR 180 eliminators is the hot ticket.
Dynoed combinations here:
http://www.ryanscarpage.50megs.com/combos1.html
Drifting
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
Pete
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
Thread Starter
Instructor
Joined: Apr 2009
Posts: 160
Likes: 5
From: Gorey Ireland
A crate was considered, but that's a whole lotta cash up front... I'm in Ireland, so customs and shipping is gonna kill me. At least this way I can do it in stages.
My car is a '76 L-48 - but the bhp was 180, not 165...... can't I only go with 64cc chambers on the stock block? to go with the 70cc heads wont I have to change the pistons etc.
Budget of about €1k - which equals $1,400... this going to get me far? Obviously I dont want this investment to take me down a one-way-street, but rather pave the way for future upgrades (but something that builds upon what I have already)
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
L48 (dished pistons)
$1400USD should get you the heads & gaskets below AND a new hydraulic flat tappet cam&lifter kit (e.g. summit p/n sum-K1103).
perhaps consider GM alum heads aka L98 aka ZZ4 heads. 58cc chambers. GM p/n 12556463 fits e2101 OK. GM head gaskets either p/n 10105117 or 14096405 are good choice w/ alum heads. Both about 0.028" thick & about 5.8cc.
OE L48 w/ L98-ZZ4 heads & either gasket makes about 9.6:1 scr.
That's the very same head that's on ZZ4; don't let anyone convince you its runners or valves are too small for a warmed over street L48.... but ZZ4 heads are not for those planning to break speed records.
$1400USD should get you the heads & gaskets below AND a new hydraulic flat tappet cam&lifter kit (e.g. summit p/n sum-K1103).
perhaps consider GM alum heads aka L98 aka ZZ4 heads. 58cc chambers. GM p/n 12556463 fits e2101 OK. GM head gaskets either p/n 10105117 or 14096405 are good choice w/ alum heads. Both about 0.028" thick & about 5.8cc.
OE L48 w/ L98-ZZ4 heads & either gasket makes about 9.6:1 scr.
That's the very same head that's on ZZ4; don't let anyone convince you its runners or valves are too small for a warmed over street L48.... but ZZ4 heads are not for those planning to break speed records.
Last edited by jackson; Jul 6, 2009 at 08:41 AM.
Pro
Joined: Mar 2009
Posts: 703
Likes: 2
I pretty much started with a stock rotating assembly with flat top pistons in my 350.. We bored it .030 over and then installed the Edlebrock performer RPM heads, Edlebrock #1201 intake, HEI ignition, 750cfm Summit carb and a fairly stout cam (Dur .240+ @ .050) and the motor put out 451hp and over 440 ft/lbs torque on the Dyno..
Thread Starter
Instructor
Joined: Apr 2009
Posts: 160
Likes: 5
From: Gorey Ireland
Not to open a can of worms here, but from what I understand while flat top pistons will give a slight increase in compression you do this at risk of detonation and need a higher octane fuel? I'm assuming the stock dished pistons are going to be fine for this upgrade?
I see different chamber options, 58cc, 64cc, 70cc - which of these will fit on the stock SB without other modifications?
Any what kinda torque/hp results would be achieveable with this?
Any what kinda torque/hp results would be achieveable with this?
Thread Starter
Instructor
Joined: Apr 2009
Posts: 160
Likes: 5
From: Gorey Ireland
I pretty much started with a stock rotating assembly with flat top pistons in my 350.. We bored it .030 over and then installed the Edlebrock performer RPM heads, Edlebrock #1201 intake, HEI ignition, 750cfm Summit carb and a fairly stout cam (Dur .240+ @ .050) and the motor put out 451hp and over 440 ft/lbs torque on the Dyno..
400 horses/torque would be perfect if I could get that far, but not too sure Id want to go any more than that for the moment (until I get some more cash saved of course!
)
Pro
Joined: Mar 2009
Posts: 703
Likes: 2
Assuming there is a safe point here as to how far you would want to go before putting additional pressure on the lower end of the engine, gearbox, driveshaft etc?
400 horses/torque would be perfect if I could get that far, but not too sure Id want to go any more than that for the moment (until I get some more cash saved of course!)
400 horses/torque would be perfect if I could get that far, but not too sure Id want to go any more than that for the moment (until I get some more cash saved of course!
)The same set-up I have with a much milder cam would probably put you right at 400hp and it would be very streetable..
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Your budget would lead me towards a cam swap and heads - doing either without the other is not going to give you a combination that works well.
The E-streets are a fine choice, although you may want to look at iron heads given your budget. Selection of a relatively thin head gasket you can get the compression in a reasonable range - you really don't need to worry too much about detonation until you get up past 9.5:1 with premium gas. I don't think you can get to 400 flywheel horsepower with that budget and shortblock, but you can sure get up around 360 or so with a good .475 lift cam and the right heads.
I've DesktopDyno'd a bunch of L-48 build-ups if you search my post and L-48s. I can take a shot at a few for you tonight if you'd like.
The E-streets are a fine choice, although you may want to look at iron heads given your budget. Selection of a relatively thin head gasket you can get the compression in a reasonable range - you really don't need to worry too much about detonation until you get up past 9.5:1 with premium gas. I don't think you can get to 400 flywheel horsepower with that budget and shortblock, but you can sure get up around 360 or so with a good .475 lift cam and the right heads.
I've DesktopDyno'd a bunch of L-48 build-ups if you search my post and L-48s. I can take a shot at a few for you tonight if you'd like.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
I pretty much started with a stock rotating assembly with flat top pistons in my 350.. We bored it .030 over and then installed the Edlebrock performer RPM heads, Edlebrock #1201 intake, HEI ignition, 750cfm Summit carb and a fairly stout cam (Dur .240+ @ .050) and the motor put out 451hp and over 440 ft/lbs torque on the Dyno..