Cam size

[funfiveliter]

I have 89 GT, thats pretty much stock. Looking to put the biggest cam possible for the factory iron heads. I was thinking of an f-cam or maybe e-cam. Please help me with my choices, I want to shift at 6500

 

[Dbeck002]

I dont know why you would want such a huge cam on stock heads. Choice is yours but the power gains are minimal since the air still has to flow through the E7s...

Anyhow, I'm pretty sure i heard someone using a X-cam on a stock engine, not sure if was with stock heads but it was with stock bottom end.

 

[Grn92LX]

Best cam is a custom cam designed to make good power with those junk stock heads. You WILL be doing valve springs and seals. You can forget about the E or F cam.

 

[funfiveliter]

See i dont know that much about the stock heads, but i do plan on buying nice aluminim ones. i would like to cam it first. Someone was saying tfs stage 1. What do you think

 

[DMAN302]

Backwards approach that will likely leave you feeling unrewarded. Any "large cam" will have substantially less impact due to the bottleneck of the restricted flow of the heads..alot of work with very limited return. Remember larger cams make great power in the upper RPM's ....stock heads don't...fact.

 

[funfiveliter]

So would you purchase heads or intake manifold before the cam. Would i make a bigger gain in power.

 

[maverick0716]

If you get a big cam now you'll get worse gas mileage, no power increase, poor driveability.....should I go on? lol. A good aftermarket intake manifold would give you around 15 hp to the flywheel....but all three things (heads/cam/intake manifold) are meant to go together....the idea is to get matching parts. So ideally you would want to do them all at once. I personally did my intake manifold a couple years ago and noticed some gain, but now that I have the heads and cam to match, there's a huge improvement in power.