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Author
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Topic: Heads question
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norcalfiddy
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Member # 11207
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posted
 
 
ok, i just picked up some gt40p's and i have a few questions.
im going to be running a e303 cam with these so would i need to upgrade my springs? if so, what brand and spring rate? (trying to find the most affordable)
and what side rockers should i run? so i dont run into ptv issues.
he said the stock gt40 ones are 1.5? and stock e7's are 1.58? am i correct?
should i run the stock e7 rockers or use the 1.5's?
thanks! ![[patriot]](graemlins/patriot.gif)
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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Sydewayz_Stan
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Member # 10217
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posted
i believe stock rockers are 1.6 except the 93 cobra. with a e-303 and 1.6 rockers you should be ok, 1.7's would give it too much lift with stock springs
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-90 Vert-SOLD
-91 Notch-SOLD
-2000 Explorer 5.0-SOLD
-72 Maverick-SOLD
-2004 GT, vortech V2 si, 10 psi-
-2002 F150 supercrew-
Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
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norcalfiddy
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Member # 11207
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posted
so a e303 with 1.6's will be ok for the stock springs?
the guy i bought the heads from said i might get valve float in higher rpm's with that cam.
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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Sydewayz_Stan
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Member # 10217
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posted
it depends on how bad the springs are. i get valve float around 5300-5500 and i have stock heads and cam, my motor has seen better days
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-90 Vert-SOLD
-91 Notch-SOLD
-2000 Explorer 5.0-SOLD
-72 Maverick-SOLD
-2004 GT, vortech V2 si, 10 psi-
-2002 F150 supercrew-
Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
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norcalfiddy
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Member # 11207
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posted
quote:
Originally posted by sydewayzLX50:
it depends on how bad the springs are. i get valve float around 5300-5500 and i have stock heads and cam, my motor has seen better days
ok, thanks
i might just replace them, not sure ill see what other people have to say.
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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Duncan Motors
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Member # 7045
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posted
change the springs, there 20 years old.then run what ever u want.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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707clone
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Member # 10342
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posted
quote:
Originally posted by Duncan Motors:
change the springs, there 20 years old.then run what ever u want.
+10000000 i shouldve done the same thing. but i was broke at the time
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Maybe I should get drunk off my HATERADE elsewhere?
I was slow to take the hint, so I'm taking a break from CAFords for the rest of the month. Now excuse me while I enjoy some cereal. Mmmmm Mmmmm good. Who else wants to join me?
Lil Ric!
R.I.P CHARLIE HUSTLE!
91gt p heads,b cam,3:55s,exhaust
89 coupe just startin on him
Posts: 2614 | From: v a dubble | Registered: Sep 2010
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norcalfiddy
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Member # 11207
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posted
quote:
Originally posted by Duncan Motors:
change the springs, there 20 years old.then run what ever u want.
what springs would you recomend? im new to valvetrain and not sure what to get..
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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Sydewayz_Stan
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Member # 10217
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posted
quote:
Originally posted by norcalfiddy:
quote:
Originally posted by Duncan Motors:
change the springs, there 20 years old.then run what ever u want.
what springs would you recomend? im new to valvetrain and not sure what to get..
I hear the trick flow springs are good
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-90 Vert-SOLD
-91 Notch-SOLD
-2000 Explorer 5.0-SOLD
-72 Maverick-SOLD
-2004 GT, vortech V2 si, 10 psi-
-2002 F150 supercrew-
Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
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norcalfiddy
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Member # 11207
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posted
quote:
Originally posted by Duncan Motors:
the trick flows yup!
looked them up, what spring rate? seat pressure, single or dual spring? what do i need?
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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norcalfiddy
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Member # 11207
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posted
also, what size are the stock gt40p rockers?
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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Jaejae5.0
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Member # 7958
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posted
Get rid of the e cam..I'm running gt40's with the trickflow springs and a tfs1 cam and I don't even get valve float..6500 all day
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1987 notchback h/c/i 302 & 70mm turbo SOLD
2000 camaro ss cam only
Posts: 4890 | From: the combustion chamber | Registered: Oct 2007
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Sydewayz_Stan
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Member # 10217
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posted
quote:
Originally posted by norcalfiddy:
also, what size are the stock gt40p rockers?
i think 1.6
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-90 Vert-SOLD
-91 Notch-SOLD
-2000 Explorer 5.0-SOLD
-72 Maverick-SOLD
-2004 GT, vortech V2 si, 10 psi-
-2002 F150 supercrew-
Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
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norcalfiddy
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Member # 11207
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posted
quote:
Originally posted by Jaejae5.0:
Get rid of the e cam..I'm running gt40's with the trickflow springs and a tfs1 cam and I don't even get valve float..6500 all day
hmmm. ill look in to trading my e cam for a tfs1. but if i got the tf springs with my ecam i wouldnt have valve float, right?
and what tf springs do you have? specs?
[ January 12, 2012, 09:20 PM: Message edited by: norcalfiddy ]
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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norcalfiddy
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Member # 11207
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posted
quote:
Originally posted by sydewayzLX50:
quote:
Originally posted by norcalfiddy:
also, what size are the stock gt40p rockers?
i think 1.6
ok thanks
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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Phil G 59
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Member # 10028
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posted
Trick Flow spring upgrade kit has max lift 542" :-) E 303 with 1.7 rockers produce 532" lift. Always check pushrod length, PTV and coil bind regardless of what the math tells you.
Posts: 13 | From: San Rafael | Registered: May 2010
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norcalfiddy
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Member # 11207
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posted
quote:
Originally posted by Phil G 59:
Trick Flow spring upgrade kit has max lift 542" :-) E 303 with 1.7 rockers produce 532" lift. Always check pushrod length, PTV and coil bind regardless of what the math tells you.
yea i know. thats why im running 1.6 rockers so i dont run in to clearance issues.
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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