Cam Suggestion

[grinder1989]

Well with 10:1 you could go a bit larger without loosing much low-end.  Maybe an Isky Mega 270 or Comp Magnum 270, but these cams have .465" and .470" lift, respectively.  Are your lift restrictions based on spring pressure or coil bind?

I have no idea.  They're Crane springs.  The guy that built the engine said to stay around .450.

[VileZambonie]

What's your spring part #?

As far as your loyalty to brand name, you'd be surprised.... I've been using summit for about 16 years and any time I've ever had a problem they took pretty good care of me except for one time. I've had many name brand company's let me down. I can honestly say I've never had a summit budget built ever let me down. Their cam and lifter kits are a good deal and basically you can rebuild a 350 for about $400 bucks if you're on a tight budget.

Before you waste $ on brand names, if you're on a tight budget you'd be better off with a summit cam kit and a dual plane intake. You'll regret that manifold.

[grinder1989]

I'm working on getting a part number.  I've had one too many problems to trust Summit brand products.  I guess an intake would be ok but I just simply won't run anything internally.  You must have gotten lucky.  What is so bad about my manifold?  I might get a new one but its not a priority. 

[frogman68]

I'm working on getting a part number.  I've had one too many problems to trust Summit brand products.  I guess an intake would be ok but I just simply won't run anything internally.  You must have gotten lucky.  What is so bad about my manifold?  I might get a new one but its not a priority. 

Hopefully I dont screw it up

Single plane is for higher Rpms

Dual Plane is good for street (to around 6000 maybe 6500)

[grinder1989]

Ah, I see.  Well I don't think it will do all that bad.  I'll have the flow at higher RPMS which is great.  How bad could it really affect my idle, low end power and all that?  I doubt it could be worse than running the stock manifold.

[eventhorizon66]

I doubt it could be worse than running the stock manifold.

Think again.  In a single plane manifold the apparent vacuum signal at the booster is weaker at low rpms.  Whereas a dual plane splits the carb and the engine (into cylinders which fire 180* apart from each other) and gives the respective booster a stronger signal.  A single plane can be made to work well on the street, but you really have to know what you are doing in terms of fuel atomization and booster signal.  A stock manifold is king for off-idle response, until it runs out of breath at about 2500 rpms, LOL.

[grinder1989]

Ok so I need a dual plane manifold.  No biggie.  I'll find one. $140 for a new one .

Anything on a cam yet?

[eventhorizon66]

I would look for a good used manifold.  It should be pretty easy to find a decent performer or performer RPM.

[grinder1989]

You know, I'm just going to run that single plane.  If I don't like it I'll change it.  No big deal really.  Is 260 duration too much for my small block? 

[eventhorizon66]

260 on the seat or 260 @ 0.050"?  If it's the latter, then YES.

[grinder1989]

CL12-205-2  Comp cams.  206 @ 050 intake 204 @ 050 Exahaust .425 for I and E.  Good choice?

[eventhorizon66]

That's a very mild cam.  It will have a stock idle.  That said, it's always better to under-cam a motor than over-cam it.

According to what I've learned from David Vizard's books.  An ideal cam for a typical NA street 350 has a 108 lobe centerline angle, is a single pattern, and has as much lift as you can achieve without excessive overlap.  So following these criteria, for an off-the-self cam, that has .450" lift (your previously stated limit), I like the Isky Mega 264, as I posted earlier.  If you are hung up on Comp Cams, a similar cam would be the Comp 268H (#12-210-2), though it is on a 110 LCA (probably not optimal).  Also DV suggests that most SBC's like the cam installed 4* advanced (Comp often grinds them like this).  I would be sure about your CR, because if you are wrong and it has less than 9:1, I'd go one step smaller to the 260H (#12-206-2).

Disclaimer: Once again all this advice is based not on my personal experience, but on my comprehension of this book in particular.  Pick up a copy, you won't regret it.

[Blazin]

I put a single plain Wiend on a 355 I had in a 4 spd. 80 Camaro once. Don't remember the duration but the lift on the cam was around 450 ish. That thing was a dog until about 4000 RPMs. Even after that it wasn't an animal. I swapped on a dual plain Edelbrock Performer I think it was. It was like adding 100 HP to the motor. Night and day difference. It was a rager from idle to about 6500, after that it was smooth but no huge power.

[grinder1989]

Here's an issue

Basic Operating RPM Range:    2,000-5,800

That's for the Isky.  The comp I chose has a range of 600-4600. 

I feel that if I throw in that isky in combination with the single plane manifold, my truck will be a pig off the line.  I think that cam will help my engine run better with the single plane.  Keep in mind guys, this engine is not a "performance" engine.  I'm going to be building a 350/Turbo 400 combo soon.  I might end up doing a 383 stroker.  Forged crank, pistons, rods, bad butt heads etc..

Thank you for all your help and information you gave so far though, I appreciate it. 

[frogman68]

just keep checking Ebay just found my Cam and Lifter kit for 130 with free shipping

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=250342710028

I did check Summit I did not like any of the numbers and this one is a "name brand"