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Topic: X303 Camshaft (Read 2762 times) previous topic - next topic

X303 Camshaft

Would this cam fit in a bone stock 5.0 HO Mustang engine in regards to clearance and valve springs? The engine is a '89 with stock heads.
Only in America do we use the word "politics" to describe the process so well: "POLI" in latin meaning "many", "TICS" meaning "bloodsucking creatures".

X303 Camshaft

Reply #1 –
Mass air?
'98 Explorer 5.0
'20 Malibu (I know, Chevy, but, 35MPG. Let's go brandon, eh)

X303 Camshaft

Reply #2 –
you need stronger valve springs, i needed them for my F303.. as for clearance, not sure.. do you have any idea if your pistons have valve reliefs?

X303 Camshaft

Reply #3 –
Maybe but why? It's a turd of a camshaft, especially with stock E7 heads......
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

X303 Camshaft

Reply #4 –
Quote from: ThunderbirdSport302;336403
Mass air?


Yes

Quote from: turbo_88_XR7;336405
you need stronger valve springs, i needed them for my F303.. as for clearance, not sure.. do you have any idea if your pistons have valve reliefs?


Yes, it's the stock '89 forged pistons. The heads are totally rebuilt with new valve springs.

Quote from: thunderjet302;336414
Maybe but why? It's a turd of a camshaft, especially with stock E7 heads......


I know it's not the best out there for sure, but I know guys with the same cam running low 12's high 11's with it. Of course not with the stock E7's or a 5.0.
The only mod to the heads is the removal of the emissions bump in the exhaust port.
Only in America do we use the word "politics" to describe the process so well: "POLI" in latin meaning "many", "TICS" meaning "bloodsucking creatures".

X303 Camshaft

Reply #5 –
the X303 isn't that bad of a cam.. beings that the heads are E7's is a bit of a downfall, but with a nice set of ported GT40's and long tubes, the cam will really come alive.. although it's MUCH better suited for a carb'd motor

X303 Camshaft

Reply #6 –
Quote from: mechanized;336402
Would this cam fit in a bone stock 5.0 HO Mustang engine in regards to clearance and valve springs? The engine is a '89 with stock heads.
  NO!    .542 lift and STOCK springs is a disaster just waiting to happen.  Have you thought about upgrading the rockers to a 1.7roller with stock springs which would give you .472?
84 COUGAR/90 HO, 1.7RRs, performer RPM,700DP, equal length shorties, stainless EXH ,T-5,Hurst pro-billet, KC clutch, 8.8/ 4.10s, line-lok, bla ,bla, bla.
71 COMET/289,351w heads, 12.5 TRWs, 750DP, Liberty TL, 9"/6.00s, 11.9x @112 , bla,bla,bla.

Never shoot your mouth off, unless your brain is loaded! ....I may get older, but I'll never grow up!....If you're not laughing, you're not living!  :laughing:

X303 Camshaft

Reply #7 –
I haven't as far as the rockers, I have FMS 1.60 rollers in their currently. Now I know that Ford claims .444 lift on the stock HO cam but from what I have read is that Ford measured their cams differently then aftermarket manufactures do.
Only in America do we use the word "politics" to describe the process so well: "POLI" in latin meaning "many", "TICS" meaning "bloodsucking creatures".

X303 Camshaft

Reply #8 –
switching to 1.7 rockers is a far overlooked upgrade to boost cam lift(so to speak).

X303 Camshaft

Reply #9 –
Stock valvesprings are good for one thing...taking up space in the s pile.  They aren't even adequate for the stock cam.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

X303 Camshaft

Reply #10 –
With stock heads and near stock everything else;  you will run slower with that cam.
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!
 

X303 Camshaft

Reply #11 –
Quote from: V8Demon;337042
With stock heads and near stock everything else;  you will run slower with that cam.


x2, you need to improve the air/fuel and exhaust flow before shooting for a big cam like the X303. E7's are the main disaster area as they flow like a fart in a can :shakeass: