View Full Version : Since Im building my car up....
12-15-2004, 09:45:00 PM
350sbc crate motor from GM...stock 350 steel heads and I believe stock cam that comes with it. Person who had it before had a Torquer 2 intake which I am sanding right now but am about to give up (I have found intakes for cheap on ebay http://www.nastyz28.com/ubb/wink.gif performer rpm that is).
Anyways, since I will most likely be getting a Performer RPM intake manifold, I am wondering what cam I should use with it. I have an edelbrock 600cfm carb and will be getting a new distributor this spring.
I don't plan on doing anything extensive to the motor, just want to get about 300HP out of it for now.
12-15-2004, 11:15:00 PM
Do you know what casting # heads you have?
Is your car automatic or manual?
Any idea of gearing or RPM's at 60 mph?
12-16-2004, 08:02:00 AM
You would have to ask wouldnt you haha.
The castings I will have to get again, I had them written down somewhere.....
The RPMs I do not quiet remember but I think at about 60MPH I was at like 2500 or 3K rpm.
The car is an auto with the TH-350. Im not sure if it has a different stall converter than stock (it might since the previous person did drag race).
I will try and get the head #s for you.
12-16-2004, 10:13:00 AM
Get the Edelbrock performer rpm cam.
12-16-2004, 11:11:00 AM
Im back....I went ahead and got the Performer intake...not the rpm...I got a good deal on it...saved almost $100 from an ebayer http://www.nastyz28.com/ubb/wink.gif
Anyways....the head castings are one of the following:
12-16-2004, 11:13:00 AM
Oh, my reasoning for getting the Performer and not the RPM is this:
I figure my powerband should be in the lower area of the rpm band, and according to the edelbrock catalog, it says the Performer is good from idle to 5500 RPM. The Performer RPM is from 1500-6500 RPM.
I need a cam to match the rpm range right? I figure in auto-x and on the street, I will mostly be in the lower RPM range so I will want power to kick in quickly.
Is my reasoning good or flawed??? There didnt seem to be much a difference in the Perfomer RPM and Perfomer except what I mentioned (and the fact I got a decent price on the Performer).
12-16-2004, 11:30:00 AM
Your logic is correct. A cam with an advertised duration in the 262 range, 268 range would be the most I'd upgrade to.
70 SS 454 CI Dynoed 684 HP, 702 TQ All Aluminium Fuel Injected Small Block , plus 200 - 500 HP NX nitrous system.
12-16-2004, 11:35:00 AM
Alright! Great, at least I know I'm on the right track here.
So then since I am getting the Performer intake, I should go with the Performer cam: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33614&item=7941844286&rd=1&ssPageName=WDVW
According to Edelbrock they suggest getting it also.
My carb will be good enough (I figure) since it is an Edelbrock 600cfm. Is there anything with fuel I should upgrade/could upgrade to see a difference in performance?
I also need a new distributor (the whole thing).
12-16-2004, 04:52:00 PM
The Performer cam, or whatever it's called is ancient technology. If you're going to buy one that ancient, save your money and buy a similar (or more than likely, exactly the same) grind at Summit Racing.
And I don't know how to ask this without insulting you or hurting your feelings, but how did you save "almost $100" by buying a Performer from someone on Ebay. They cost $115 through Summit. Did you get it for free?
Here's a link to that same cam buy for ~$80 with lifters from Summit.
--->Click here for the cam by itself.<--- (http://store.summitracing.com/partdetail.asp?part=SUM%2D1102&N=120+4294925232+4294924497+302116)
--->Here for the cam and lifters.<--- (http://store.summitracing.com/partdetail.asp?part=SUM%2DK1102&N=120+4294925232+4294924497+304742)
350CID, Vortec 062 heads, Magnum 280, Performer Intake, Holley 650 DP, 3.42 rear w/ Auburn posi, 2600 Stall/TC
"Things are more like they are now than they ever were before."
Former U.S. President Dwight D. Eisenhower
[This message has been edited by AJ_72 (edited December 16, 2004).]
12-16-2004, 08:02:00 PM
I was going according to the Edelbrock catalog. I figured that companies would charge more than them direct....guess I was wrong.
Their catalog says $180 (or 185, I forget which exactaly) and I paid $85 for it on ebay.
12-16-2004, 08:06:00 PM
Can you show me where that intake manifold is that price...I cant seem to find it off hand.
12-16-2004, 08:10:00 PM
Nevermind I found it. So I didn't save what I thought (only according to Edelbrocks catalog).
How is the Performer ancient technology? Is there something that will give me better low/mid range performance for cheap here?
At least I save some $$ though. I still paid less than new...we will see the condition when it gets here (I saw pics, but the thing is a little dirty to tell its EXACT condtion...and you cant always trust what a seller has to say).
[This message has been edited by Hexx (edited December 16, 2004).]
[edit again] According to the seller, the intake manifold was only used in 3 races, the pics look good and promising so...yeah http://www.nastyz28.com/ubb/wink.gif
....and that link I sent with the cam took me a whole 2 seconds to find, so I didnt have time to compare prices with other places.
Thanx for the heads up on the cam though...
[This message has been edited by Hexx (edited December 16, 2004).]
12-17-2004, 12:46:00 AM
And as I said, I wasn't trying to bust your balls about the intake manifold. I just wanted you to know that they're not that expensive in the first place.
The RPM and the Air-Gap on the other hand.....
12-17-2004, 03:48:00 AM
I believe Edelbrock dynomatched the Performer cam with the Performer intake and carb which you already have. I'd probably go with the Performer cam over the Performer RPM cam. Probably the best combo for low end torque and mpg. When you have a correctly matched engine combo, good things happen.
12-17-2004, 10:02:00 AM
Yes they did dyno match it ^_^
Now, for heads. Does anyone have suggestions for some decently cheap/junkyard salvagable heads? I know you guys speak of the vortec heads being cheap and easy to find, but that would mean I need a new intake manifold and stuff right? (I dont want to go that way right now).
12-17-2004, 11:29:00 AM
333882 Are you sure those arent the casting numbers?? 882s are decent heads.
12-17-2004, 03:03:00 PM
Those are the numbers I see when I take my valve covers off. I can take a pic this weekend if you want http://www.nastyz28.com/ubb/wink.gif
Just how "decent" are they? Again, I don't know if these were ever swapped out. I would assume they came with the crate motor. If you need the block casting I can get that.
Anyone have specs on these heads? I can't find ANYTHING on Mortec for the life of me. The numbers just don't match... http://www.nastyz28.com/ubb/frown.gif
12-17-2004, 03:39:00 PM
Are you sure that those numbers are not 993?
If they are either 882's or 993's they are good heads.
The 993's are the best open chamber heads that GM ever produced. I've seen a good set of 993's fetch as much money as a set of double humps at a local swap meet.
So they are not bad heads.
For your setup, I'd stay with those heads.
If you went with Vortecs or some aftermarkets, you'd raise your comp ratio. Which you don't want to do.
With that small of cam, you want a pretty low comp ratio.
I've built a couple engines with the targetmaster 993's. With some good working done to them, I pulled 380hp out of one and over 400hp with the other.
Yes guys, it can be done, you can pull over 400hp out of highly worked GM large chamber heads. I'm not saying I'd do it again unless requested by the owner. Because there is just to much stuff on the aftermarket table that is better, for a cheaper price than having these factory heads tooled.
So getting back to the subject.
I'd say stick with those heads.
You don't need to anything to them. There's just no justification for it with that setup.
You'll be good.
12-17-2004, 04:30:00 PM
But does anyone know WHY I cant find info on the heads...I am about 99.9% sure its 882. The last number is for sure a 2 and not a 3. The 8s look like 8s or 3s lol. Hard to tell because the numbers arent that big and the casting could be a bit sloppy with the numbers.
Is there a way to check from the design (bolt holes) on the front of the heads? I know someone posted a link up before when I asked what heads I have (about a month to a month and a half ago)...but I can not find that link again http://www.nastyz28.com/ubb/frown.gif
Thanx all for your help.
01-02-2005, 07:37:00 PM
So....I guess I havent gotten a straight answer yet.
What are my heads???? 3888383 is the casting Im sure. The motor is a '94 crate motor....I would really like to know what the heads are.
Any help is much needed thanx.
01-02-2005, 10:59:00 PM
not sure how much this helps but......
01-03-2005, 02:13:00 PM
I've looked in most places....sigh....I will go back out and take ANOTHER look at the castings...and if I can find some batteries I will take a pic and have you guys try to figure out what my #'s are http://www.nastyz28.com/ubb/frown.gif
01-03-2005, 06:57:00 PM
Regardless, if you're using stock heads I'd go with the Performer. The Torker II is a slug, IMHO. Good for LOW hood clearances, like a Corvette, but that is about it.
For a cam, try the Isky 264! It'll rock in a stock head engine.
01-03-2005, 09:01:00 PM
If I remember right... isnt the Perf RPM cam just a replica of the old 327/350hp cam? I've heard that cam sucks, despite how it looks on paper. I'd go for something a little more modern in design.
01-03-2005, 09:58:00 PM
Something a little more modern eh?
Ok, well...I have the Edelbrock 600 CFM carb, the Performer intake manifold, so what would a nice cam be for a 350cbc? Something that would be great for low-mid power.
01-03-2005, 10:50:00 PM
Well you mentioned that its a crate motor. Closest number I see is this one. Clean it off real good and check.
3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico",75cc chambers
01-04-2005, 05:23:00 AM
Old Chevy castings were poor for getting a clear number off of. They could be 993, 336,339, so many to list.
01-04-2005, 09:07:00 AM
So....are these "ok heads?" Also, what would be a good cam....for low-mid range power....as mentioned before.