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Old 09-06-2012, 10:24 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, 08:57 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 09-08-2012, 12:34 AM
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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, 07:54 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, 08:06 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, 11:04 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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