E7 heads with stock springs, e,f,b,x cams?
- Thread starter nidyanazo
- Start date
gt40_2003wes
I did sound a wee bit gay there.
like i said, I'm not totally sure. my "first car" was a rolling chassis (4cyl coupe) that my father had this engine built for (several years ago, when i had no idea what a cam was, let alone what cam it had). we're are almost done w/ the install in my current coupe (it was a v8, just gettin a fresh start 
. it may have upgraded springs,but im not totally sure, so i'll do a little research tomorrow.
-Dan
. it may have upgraded springs,but im not totally sure, so i'll do a little research tomorrow.-Dan
mustangramair
Member
I myself would not trust stock springs, especially if they are used springs with an aftermarket cam. I would buy new springs, better safe than sorry! Do the heads have any work, ect valve job, bowl blending, porting, milling? If they don't have any work done to them i would not run an aftermarket cam, stay with the HO cam. ~Nick
Good advise. I'll start out with 1.7rr's, then port the heads, and get a new cam and springs. I'm just happy to have gotten a better head. Everyone bags on the e6's and says "you'll gain form 10-25 hp going to e7's". I really just wanted to extend my rpm range, but I hope I don't lose and down-low torque!
Lift is only part of the equation. The major factor is basically ramp rates. The faster the lobes ramp and open the valves, then you can bet that during the closing of the valve weak springs will not be able to close the valve fast enough. Next thing you know the lobe that opens that valve comes back around with the valve still open, smacks the lifter quite hard, then starts opening it again. This puts hard wear and tear on your valvetrain, power greatly goes down, combustion becomes inefficient and you start literally dumping out raw and unburned fuel out the exhaust port (which in turn the cats do not like to see with their temps).Modular2v said:
It's a lose-lose situation if you don't use the proper springs, just fork over the money for the appropriate/proper pressures.
Your cam will determine entirely where your powerband is (but make sure you match you heads, exhaust, and all intake components to it). If you keep most importantly your advertised duration below 280* or so (this is key) and lift below around .530 - .550 or so, your low end should remain intact.nidyanazo said:
Pick wisely from the start instead of going piece-shopping-happy.
18mustangs
New Member
aleborjas said:
He's not getting a Ford cam, he's getting a Ford Racing cam which is made by Crane! Even with 1.7s he'll need new valve springs or he's looking for trouble.
Tim
