Hey guys, give me your thoughts on what this combo will be like on the street with the Explorer cam and boost. I'm having a hard time thinking about a $500 upgrade for cam and springs when I paid $600 bucks for the motor lol...

(F4TE-6250-BA)
256 / 266
186 / 197
0.422 / 0.448
116 LSA

I don't have another cam lying around and I know the limits of these blocks with boost so I'm hesitant to buy a another cam and do the spring upgrade on a stock block.

This is just a weekend driver for fun nothing too serious.

1990 Mustang
2000 Explorer block all new gaskets
Explorer cam
Fresh GT40p heads
Holley Systemax II intake
70mm Throttle Body
70mm On 3 turbo
60 lb injectors
Moates Quarter Horse
3:55 gears
TKO 600

 

IMO run what you have. It’ll be fine . The power you lose from not doing a cam upgrade can be made up with a few extra psi of boost.

 

I agree with above, for 500ish hp the stock cam is fine. Cams have gone up so much in price it's silly, lots of other places on a car that could use $500.

 

I was a little worried because the Explorer cam is smaller than the Mustang cam but sounds like boost can make up for the shortcomings.

 

I put a sn95 gt cam in mine. Bought used from eBay for $65.

I wouldnt put the explorer spec springs back in though, definitely upgrade those, imo

 

1.7 rockers will bring the explorer cam into the HO cam specs, pretty close anyways.

 

Just for argument's sake, a set of rockers would be significantly more expensive than just buying a used cam?

I decided to just put the cam in as my short block was a 200k block and I was putting a timing chain in it anyways, it wasn't much more work (considering I was swapping springs as well).

So here's a question. Will boost allow you to push past the cams normal breathing range? Won't it roll off at the same point with or without boost?

 

Boost might carry it a bit past n/a peak. But yes, the cam will dominate where the peak hp rpm is.

 

I wouldn't expect a lot, but boost will typically extend the hp curve some.