i have a 81 z28 an edlebrock intake 750 double pump holley flat top[ pistons headers 4:11 gears might change to 5:13 2 speed power glide 1.6 ROLLER ROCKERS and vortec heads soon to up grade what would be the best cam/biggest for the strip

 

Hydraulic flat tappet cam?

Rich

 

im kinda on a budget would i have to change my lifters nad how much wat kind how much hp and tourqe gain

 

What are you running, hydraulic or solid lifters?

Rich

 

solid lifters and what is my max duration and lift

 

It depends on the heads you are going to run. A custom grind would most likely be the best choice.

 

what would be the best cam and head combination then something on a budget to get into the low 11s

 

You need to pick the heads, intake and cam to work together in the desired rpm range.

Rich

 

I wouldnt ask what cam should I get for my car here. You will get 10 people saying 10 things. Your best bet is to call, yes call the cam maker and tell them what you want to do. They will ask you questions about what you have and what to do. that is the best and in my opinion the only way to get it right. Other than that it is all guess work.

 

Unless you have a specific contact calling a cam company is also a crapshoot. At the bigger places, notably Comp, you may well know more than the guy who answers the phone.

Rich

 

In some cases I would agree, but just because a cam worked well for one setup there is no promise that it will work for his setup. I am sure you know that we all here have different engine builds, so what makes my car run damn good may not work in his or yours. Picking a cam by asking 10 different people will yield 10 different answers. Calling a cam grinder or say summit or whoever, he will get a good recomendation for a cam based on what he is running or plans to do. We all may have an opinion but it isnt our build.This is not a slam to anybody here if it taken that way, oh well. The point is, these cam grinders have spent the money on R&D, they are in a better posistion to know more than most all of us. I just want this guy to get it right the first time rather than spend 2-300 dollars on a cam that may not do what he wants based on the opinion of a guy here that may not know what he/she is talking about.

 

What we know:

1) You have no computer-controlled EFI computer to worry about
2) You have a car that weighs about 3800 lbs.
3) You have a two-speed powerglide transmission set up for drag racing most likely
4) You have Vortech heads
5) You have specified a gear selection that indicates max-effort drag racing.

What we do not know:
1) Your torque converter specifications and if this is open to debate
2) Your cylinder head's maximum allowable valve lift
3) Your cylinder head's airflow and intake runner volume
4) Whether or not you'd entertain the possibility of going to a roller retrofit hydraulic or perhaps even solid camshaft, or if you need to stay with a flat tappet cam, be it hydraulic or solid.
5) Your valve spring configuration and if it's changeable
6) Whether or not this is a weekend toy or an every day driver

These are the sorts of questions that we'd need to know, and that the cam company will need to know in order to determine a suitable camshaft selection. Also, I hate to say it, but it's going to be difficult to get into the low 11's with a 3800 pound Z28, a 750 Holley double-pumper, and a 355 while still maintaining a budget. You are going to need to create an engine that makes a reliable 500 HP at the flywheel. That sort of HP from a 355 is going to require some RPM, some good cylinder heads, and careful tuning of that Holley.

 

the vortec head stock is limited to .450 lift so u should go less than that. as for 5.13 gears. u need to go 1/8mile. Need alot more info.

 

An Edelbrock RPM cam or a Lunati bracket master.

 

Is this a drag car only or a daily driver?