F303 and E7's

Ieatcamaros · 10-27-2003, 11:43 PM

Will the stock springs handle the lift of an F303? Don't know much about the E7's, so I thought I'd ask before I break some springs in my brother's heads.

Dark_5.0 · 10-28-2003, 10:16 AM

No the stock springs cannot handle an F-303 cam. Not to mention if your heads are unported its a waste of time and money to install a cam that big. By the time you reach the cams power band your heads will have peaked long ago.

Coupe50h · 10-28-2003, 05:49 PM

What he said.
I was using an e-cam with stock springs, and the car felt like it hit a brick wall at 5400 rpm, put on some cheap comp springs with a damper, and now it revs to 6250 without floating the valves, i shift around 5600 with my cam though.

Ieatcamaros · 10-28-2003, 06:46 PM

I know that the cam is overkill for e7's, by all means, the e cam is overkill. I had it and he wants it. We were just going to put it in so when he gets the afr 165's, all we got to do is swap the heads. And it is much easier to put a cam in on the engine stand than in the car. Will the f cam break the springs?

Coupe50h, what kind of springs did you get?

Dark_5.0 · 10-29-2003, 09:32 AM

I dont think the F-cam will break the springs but you may have trouble in the upper rpms floating the valves.

If you plan on doing a head swap in the near future I would go ahead and drop in the cam. Cause it is alot easier to install a cam with the motor on a stand like you said.

Good luck,

red82gt · 10-29-2003, 08:52 PM

You may get away with it, but you'd be pushing your luck. The stock spring pressure isn't great and you may be in danger of coil bind as well.

Ieatcamaros · 10-29-2003, 10:03 PM

What exactly is "floating the valves"? I have heard this time and time again. I have a pretty good idea of what it means, but I had rather know.

rwhite65 · 10-29-2003, 10:49 PM

guys who have done this often before, correct me if I am wrong. I believe it sounds like crap when the car is revved to high. The only few times I have seen it done, sounded like a cross between fouled plugs and a car that is revved to the limit pill (like a MSD 6AL).
Ryan

QuantumMotorsports · 10-30-2003, 02:31 PM

It means that the valves are unable to seat fully before the end of the compression stroke and the plug fires while the valve is slightly open. valve float = almost no compression at high RPM + mega nasty sounds coming out of the exhaust

Coupe50h · 10-31-2003, 03:46 PM

you might try looking at old post using search, but i dont remember the part# cca-942 is what i want to say, but not sure?

I suggest you get the crane kit made for 5.0s so you have all the right retainers, im probaly near coil bind using my stock retainers with these springs.

10-27-2003, 11:43 PM	#1
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	F303 and E7's Will the stock springs handle the lift of an F303? Don't know much about the E7's, so I thought I'd ask before I break some springs in my brother's heads. __________________ The sig says it all.

10-28-2003, 10:16 AM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	No the stock springs cannot handle an F-303 cam. Not to mention if your heads are unported its a waste of time and money to install a cam that big. By the time you reach the cams power band your heads will have peaked long ago. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

10-28-2003, 05:49 PM	#3
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	What he said. I was using an e-cam with stock springs, and the car felt like it hit a brick wall at 5400 rpm, put on some cheap comp springs with a damper, and now it revs to 6250 without floating the valves, i shift around 5600 with my cam though. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

10-28-2003, 06:46 PM	#4
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	I know that the cam is overkill for e7's, by all means, the e cam is overkill. I had it and he wants it. We were just going to put it in so when he gets the afr 165's, all we got to do is swap the heads. And it is much easier to put a cam in on the engine stand than in the car. Will the f cam break the springs? Coupe50h, what kind of springs did you get? __________________ The sig says it all.

10-29-2003, 09:32 AM	#5
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	I dont think the F-cam will break the springs but you may have trouble in the upper rpms floating the valves. If you plan on doing a head swap in the near future I would go ahead and drop in the cam. Cause it is alot easier to install a cam with the motor on a stand like you said. Good luck, __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

10-29-2003, 08:52 PM	#6
red82gt Sober voice of Reason Join Date: Nov 1998 Location: Kelowna, B.C., Canada Posts: 1,514	You may get away with it, but you'd be pushing your luck. The stock spring pressure isn't great and you may be in danger of coil bind as well. __________________ 393W: AFR 205's, hydraulic roller, TKO600.

10-29-2003, 10:03 PM	#7
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	What exactly is "floating the valves"? I have heard this time and time again. I have a pretty good idea of what it means, but I had rather know. __________________ The sig says it all.

10-29-2003, 10:49 PM	#8
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	guys who have done this often before, correct me if I am wrong. I believe it sounds like crap when the car is revved to high. The only few times I have seen it done, sounded like a cross between fouled plugs and a car that is revved to the limit pill (like a MSD 6AL). Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

10-30-2003, 02:31 PM	#9
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	It means that the valves are unable to seat fully before the end of the compression stroke and the plug fires while the valve is slightly open. valve float = almost no compression at high RPM + mega nasty sounds coming out of the exhaust __________________ Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites

10-31-2003, 03:46 PM	#10
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	you might try looking at old post using search, but i dont remember the part# cca-942 is what i want to say, but not sure? I suggest you get the crane kit made for 5.0s so you have all the right retainers, im probaly near coil bind using my stock retainers with these springs. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear