Im looking at Cam # 08-300-08 and Cam # 08-500-08

Cam to be used in TBI application and stock computer w/ prom tuning

The 08-300-08 is located in the computer controlled section (with a 112 LSA), yet the 08-500-08 has the more aggressive lift profile of the XE series, has the 112 LSA for good prom tuning, and says it can be used with a stock throttle body (I assume they mean a TPI throttle body, not TBI)

Why not use the cam with the more aggressive lift profile? Of course, your valve train will have to handle it. What am I missing here?

 

The problem is both of those cams have too much lift for unmodified heads ect.

if you are planning on getting the valve guides cut, and using better springs and screw in studs, you might as well look for some TPI heads. if you go that route, it hnk the 08-501-8 would be a better choice.

HTH
John

 

Heads would be either Pro Topline or SDP modded GM vortecs.

Screw in studs are a must.

So you wont have problems tuning with the 08-500 and the stock computer? Great.

Edit- I am still mulling over the 264 grinds, but I got a big & heavy car.

 

Im running the 08-500-08 with stock heads and comp no problem.

 

thanks for the reply. Any problem making up the new fuel curve?

 

what exactly is this going on?

if it is a 350, with pro-toplines. give it alot more cam.

if it is a 305 i would go with the 501 myself.

once you do heads/cam no matter what you are going ot need to do custom tuning to get it to work. but those grinds you are looking at are fairly tuneable. no real headaches should come from them, they are not very extreme at all.

 

This is a build I'm putting together for my caprice. I'm a little hesitant to make any part of this thread 'caprice oriented.' However, since a number of you guys seem to be running L05's, pointing out the specifics of my planned build may be useful to the third gen crowd.

Car
9c1 (police) caprice - 70K very well maintained miles. I have proof of this, plus my own compression and various other checks. It was babied.
FYI- these cars came stock with a number of goddies, the one most applicable to this thread is the 3.42 gear ratio.

Goal
Swap out top end and exhaust for a combination that is well suited to moving around the 4000 lb Caprice.

Plan
Build torque in the 1000 - 5000 (5500 tops) rpm range.
Heads - Vortec or Pro Topline vortec seemed best for the goals I have.
Headers- long tube
Intake Manifold GMPP dual plane vortec intake

Cam ??
Valvetrain ?? - depends on cam.

This portion of the build is probably the only place where it would differ in application from an f-body build. I'm not entirely certain that a 264 grind would be best suited for my car, though it might. Anything bigger than that would misplace the powerband for my application, IMHO.


Induction
Replace small block TBI with GM 454 TBI. I like the stock look, though I'm not sure of the GMPP manifold can handle machining in the 2 in bores. If not, ill use a dual plane carburetor intake and a TBI adaptor.

Tuning isn't a big problem- it's just tedious, though I’m eagerly waiting for the prominator to take the edge off burning and swapping out chip after chip.

 

9C1,

As sig shows, I'm running the 08-300-08 with the other shown mods. I didn't do the tuning but it's very drivable. I can't tell you about the 08-500-08 but I would recommend to stay mild. The TBI is not good at high RPM, even the BB unit. If you shift the powerband higher you wont have the induction to support it.

Check you hood clearance with the Performer and adapter. I'm using the Caddy airbox which is slightly taller than stock and do not have room for a stock Performer RPM. I'm going to customize it to fit. I know the regular Performer is shorter but you might want to double check fit before you get to that point. I presume you know about the difference in distributor size and will bore the manifold or swap distributors.

I anticipate doing a Vortec conversion next year but haven't seen a manifold with enough of a dist boss to bore out- yet. Welding it up before boring is an option, though.

 

Actually, I'm trying to find out about the distributor size difference. I know the 91-93's distributor needs to be replaced with a truck type to fit, but im not sure about the boxy.

At any rate, my distributor is a tad fubar, cause the rotor sits a little tilted and rubs on one side. Makes an annoying squeaking noise intill it 'breaks in'. I have the caddy air box and if it gets too tall, Ill work something out. Though, I'll probably use the shorter intake manifold to pump up the torque curve.

Back to the initial point...
Why did you go with the 08-300-08 instead of the 08-500-08?

Edit
Swerve Driver just told me what part number distributor to use part # 1103952 for $157.50. That bit of info was greatly appreciated.

Edit #2
Looks like it's official, the pre 91's used the truck distributor and fits the vortec manifold.

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what about a 08-303-8

 

I cant find those cam specs on the comp cams website. They have 08-302-08 and 08-304-08, but, from a guess, I would have to wonder about it's intended RPM range? it would be a '265' grind and have a little too much duration IMHO.

Im really wondering why people would opt for the '300' computer controlled cams instead for the '500' cams, for reasons other than emissions, when people seem to make the '500' cams work with the computer, pass emissions tests, have a much more lift with their given duration and have the same LSA?

 

don't look for the cam card it's a new cam. I think it's a NOS cam. look under the catolog. i found a better cam from lunati. number 54762. Thic came works better for my setup that i'm building now. Desktop dyno says

473HP@6000RPM
459torque@5000RPM

so i'm figuring high 300 to low 400 to the wheels.

 

I changed the cam and put on the Edlebrock TBI intake at the same time.It does shift different.I just shift 2nd-drive-overdrive as if it was a stick.Fuel efficiency dropped(about 12-15 mpg!!!!).but ALOT of torque.Even though its a comp contolled car and ppl said it couldnt happen,I do have a slight lope....just enough to be noticable and sound badass.

 

Oh yeah, thats what I'm talking about.

 

"Back to the initial point...
Why did you go with the 08-300-08 instead of the 08-500-08"

1. The 08-500-08 wasn't around. It's not even in the catalog I have.

2. I figured if Comp called it for "computer controlled" vehicles, they had more experience than I did to make that call.

 

Thanks for the reply.
From what I gather, your 300 cam would be a cheaper setup, cause I could get by with new GM parts on the valve train . The extreme energy cam has a pretty dramatic lift profile, and might be better with the (more expensive) valve train components that comp cams recommends.

Tough call. Thanks for the replys,