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Old 09-06-2012, 09:24 PM
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487 heads/vortech/cam ???

70 Chevelle 8.5 low compression with dished pistons 350. I also have a 454 that I plan on building with 781 heads but can not afford this project right now. In the meanwhile I was thinking about putting some bolt on's to that 350. Your advice would be appreciated. This is what I am running right now: stock 350 with 1406 Ederbrok carb, headers, 2101 Ederbrok Performer intake, set of 487 SBC heads. The car has a T5 transmission I plan on using it as a daily driver. I want the car to have a nice idle and I was hoping for about 300-330 HP.
I am also considering buying some Vortech heads from Scroggins Dickey that have been modified for high lift and match with a Voodoo 262 or 268 cam.
If I am not ready to fork over 1000 for that at this moment then what other options do I have?
I read that the 487 heads are fairly good flowing heads, so for financial reasons, I might just match my set up with the best possible cam and springs/ save money for 454 build. What would you do? What cam should I use? How much lift can 487 heads handle? What HP should I get with this combo? Should I wait until I can afford to by those Vortechs? Give me your 2 cents? If there is a cam that you would recommend that would suit the CHEVELLE better please tell me about it. I appreciate you support, me newbie.'.'.











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Old 09-07-2012, 07:15 PM
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Find osme 305HO heads #4416 and fully home port them. Add 1.94 intake valves.
Install using a thin felpro 1094 gasket.
More flow more compression more power more torque.
Isky cam #201271 Isky 205D springs.
Performer rpm hi rise intake

Don't be shy with the porting use a felpro 1205 intake gasket as a guide.

The 487's will flow good too once home ported. The job is the same.
The small chamber 4416 heads will raise the compression ratio on your dished piston 350.

Now keep the 487's and get porting them too.
Then go buy a Weiand 144 blower or weiand 177 blower and bolt it on with the ported 487's
Low compression more flow big supercharged power.
Now you don;t need a big block.
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Old 09-07-2012, 07:57 PM
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487 heads/vortech/cam ???

Comp Cams 12-210-2, 268H, 500-5500, .424/.454 lift and 218/218 duration. With just a cam swap you will be somewhere in the 320hp and 400 lbs torque. Uses stock converter too. Another cam a little more stronger with nice idle is 12-239-3, X4262H, 1300-5600, .462/.480 and 218/226 duration. 326hp and 409 lbs torque. It would be better if your chambers weren't 76cc.
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Old 09-07-2012, 11:34 PM
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I think you are a prime candidate for upgrading to Vortec heads. You will get a nice bump in compression ratio, more CFM, and a more efficient combustion chamber. You will *probably* see a 30-40HP gain over those 487 heads. However, this is not all kittens and rainbows. There are some periferral costs in upgrading to Vortec heads. Check out our wiki, there is a section that talks about this:
http://www.crankshaftcoalition.com/w..._Compatibility

While getting the complete package from Scoggin Dickey is a viable option, it is kinda pricey, especially all at once. Check out your local CraigsList, Vortecs come up there all the time and you can negotiate and trade. You can get some used ones for $100-$300. Then save your money and modify for higher lift and get the other things you are going to need.

But based on what you are saying, I think you oughta just slap a new cam in the motor and call it good. If you have to put your big block dreams on hold and have doubts about dropping a thousand on the Scoggins package, then perhaps, just get a cam (and lifters, distributor gear, timing set) and call it good. Of course the home head porting job on the 487's will make more power and save money too (but then you are going to need new head gaskets, maybe new head bolts, etc).

The cams with the advertised duration of 268 will give you the power and idle that you want. Just search YouTube with the cam you are interested and you will get to hear car sounds. Just keep in mind that cam duration needs to be balanced with the compression ratio, so don't go hog wild and put any old cam in there. More duration=the need for more compression. Here is some more reading on that topic: http://www.crankshaftcoalition.com/w..._compatibility
And based on that chart your 8.5:1 isn't going to work well with a performance cam.
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Old 09-10-2012, 06:54 PM
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Thanks for all of your replies. I really appreciate your support. I have been reading many of your post and was hecka excited to here what Fire bird 88 and others have to say that I respect and think are on point. Your comments have left me with a couple of questions. I heard about those 305 heads, and that was my initial plan to bump up the compression. I then was told by a local engine builder that I would be better off with a good set of 350 heads instead of those 305's. Although I have never ported anything I am sure that I could research the process, buy the necessary tools, match gaskets etc... and get er done.
How much would this cost me? It seems that It would cost me about 80% as much as Vortechs to set them up. How would they compare to Vortechs? When you mention (More flow more compression more power more torque) I assume you are comparing the 305 (416) heads to the 350 487heads? How do the ported 305's compare to the Vortechs? vortechs hands down right?
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Old 09-10-2012, 07:06 PM
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If I decided to port my 487 heads would you run the 262 or the 268 cam? Will those stock heads springs support the necessary lift or should I just go with what the cam vender recommends??

What cam would recommend if I get the vortechs with 5.25 lift?
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Old 09-11-2012, 10:04 AM
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487 heads/vortech/cam ???

I have been checking out some other forums (Chevelle.com, Camaros.net). It seems that the XE Comp Cams have some valve train noise. Some describe it like having solid lifters. They have good performance results though. The EX262H has better hp and torque than the EX268H. This Crane cam would be a substitute for the EX262H. Crane Cams 10013 - Crane Hydraulic Flat Tappet Camshafts - Overview - SummitRacing.com. This Crower Cam is another substitute for EX262H. If it is anything like my solid roller their awesome. Crower 00903 - Crower Hot Street Beast Performance Level 3 Camshafts - Overview - SummitRacing.com. With any cam except stock (same lift) you need to go with Manufacturers recommend valve springs. Think of it like this new cam, new lifters, and change 30 year old, tired valve springs. These cams will work good with Vortecs if later you decide to buy them. So it's just a head swap. If you get the 487's ported and see how much you can mill them (64cc is what you want) I don't think you will want to spend money on heads. Save the money for the big block build.
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Old 09-11-2012, 11:00 AM
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Stock 487's flow about 195 and 140. stock 416's flow about 190 and 130 (1.84x 1.50)
stock 062 vortecs flow 228 and 150. The recent mexico vortecs flow about 10cfm less now.

My ported 416's flow 234 and 180 (1.94x 1.60) I have gotten as much as 242 and 200+ on these heads. (maxed out)

The 487's port up about the same improvement. 230++ but the chamber is too big.
You end up with a ton more port flow and power , reguardless. once ported.

The only way to get the chamber volume right on a 487 for this is to angle mill$$$$. Thus the ported 305 head. The whole point of using the 4416 heads (when ported) is the small chamber and cheap to get.
The vortecs are really good. My ported 416's work really good too.

350heads: yes there are 64 cc 350 heads to use (with porting) too (with generous porting) Camel back etc.
The 083 L98 TPI motor head is a diamond in the rough too if you trip over a set.
All stock SBC heads are lame in stock as cast form.

The 416's are everywhere. People throw away, give away 305's.
Total cost is how well you can skin the cat and keep price down.
Its costs me $460 to do my 305 heads.
Its up to you to shop around and dig up the heads.

You caught the part about the 144-177 supercharger. If you ported your 487's now and used a small cam with low compression, for now .....then bought a blower and added a new blower friendly cam too
Your low cr SBC will make huge power. for way less than a BBC.
The key is low compression ratio and head flow.
The ported 487's make good street blower heads.
its up to you to check valve train lift clearance on your heads.
don't ask , measure. Then buy a cam. After the heads are all done and checked.

The #1 mistake everyone makes is running out and buying the cam first.

Last edited by F-BIRD'88; 09-11-2012 at 11:05 AM.
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