Camshaft options

[paintdudeluke]

Where can I see some available cams with power curve graphs? Whats available? What sources? Links would be appreciated. Thanks guys.

[paintdudeluke]

Anyone using these?

http://www.midwest-bayless.com/storefro ... =251198379

[narfire]

I'm really happy with Mark's 274 FI cams. Gave the car a nice boost as long as you also use the adjustable cam wheels and dial in properly. (109 deg center)

Chris

[RRoller123]

Is it a difficult process to dial them in properly?

[So Cal Mark]

my 274 grind is really for stock FI motors, our most popular street cam is the 285 grind

[paintdudeluke]

[fiat218]

I got stage 2

[davery]

my 274 grind is really for stock FI motors, our most popular street cam is the 285 grind

Do have any other cams for FI motors?

[fiat218]

Why would the cams be different ! FI. Or CARB

[paintdudeluke]

Why would the cams be different ! FI. Or CARB

Carbs adjust to whatever airflow is present without non-variable parameters (programming) .The FI computer may not recognize the low vacume associated with increased overlap. For example, the car might run like it has a vacume leak or something rather than compensate and adjust. Ford speed density FI systems have pathetic limitations as opposed to the MAF systems they use (which are quite "smart") and compensate for everything, cams, heads, compression, stroker crank, it figures it out and runs great. The older Speed density type runs crappy even with anything but the most conservative cams. A computer might calculate mixture based on relationship between sensors, not just MAF as the primary calculator.


(Please correct if this is not quite right, I'm just going off of typical FI issues.)

[So Cal Mark]

the Spider FI system isn't that sophisticated. Mixture is based on air flow and engine temperature. We have several different grinds and the best choice depends on your engine, rpm range and driving habits

[davery]

the Spider FI system isn't that sophisticated. Mixture is based on air flow and engine temperature. We have several different grinds and the best choice depends on your engine, rpm range and driving habits

I have an 85 that has a K&N cone filter and an Ansa exhaust. What would the different cams be for this and what kind of performance change could I expect?

[paintdudeluke]

the Spider FI system isn't that sophisticated. Mixture is based on air flow and engine temperature. We have several different grinds and the best choice depends on your engine, rpm range and driving habits

If only airvolume and temp then it should feed any cam just fine up to its fuel flow limits right?

[So Cal Mark]

lots of overlap at low rpm can be a challenge for the stock fi system. A free flow exhaust will help but if you have a stock or poorly designed exhaust you'll get reversion and that will upset the intake charge during overlap. In addition, lots of overlap reduces running compression, so you can end up with poor low rpm performance

[v6spider]

lots of overlap at low rpm can be a challenge for the stock fi system. A free flow exhaust will help but if you have a stock or poorly designed exhaust you'll get reversion and that will upset the intake charge during overlap. In addition, lots of overlap reduces running compression, so you can end up with poor low rpm performance

Seems to ring true on any engine..big cams do not work well with fuel injection.. I'm running a big roller cam on my 4.3 vortec v6 ... I had to give up my megasquirt II because the overlap is too great...