GT40P E303 swap questions

[TLSF150]

Putting some gt40p heads and explorer intake on my fox with a e303 cam..

And I already have the cam so thats what im going to be using.. I know letter cams are old but I already got it so might aswell use it..

Now what I want to know is what RRs and springs to use in the heads.. I live close to summit so id prefer to buy them there instead of ordering them online unless its a huge difference in price..

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[Addermk2]

Look in the FRPP catalog. They supply part numbers for springs that are specced for that cam.

I hope you are gonna get your CR up around 10.5:1... Otherwise you are going to have a gutless turd. And you can thank that cam.

 

[RichV]

^ Love yer hate for the e cam.

I run the 40Ps, E303, Crane/Cobra 1.7 rr, and the heads have TFS stage 1 springs. That is all. Should be good for 260 at the wheels with a healthy shortblock and a exhaust.

 

[Addermk2]

Rich, I made 253 on a stock cobra engine. that E-cam is a pile of shit.

 

[RichV]

I know, you and I have already had this discussion. That's not the common, I bet not one pushrod Cobra on this site has duplicated that.

One of my competitors made 230 at the wheels on a 200k long block, 88 Fox with everything stock except a off road h and side exit exhaust. Everyone else had to have at least a GT40 intake and lower mile motors. Go figure.

 

[Win]

Crane gold 1.7 with wolverine 1087 cam with gt40 upper lower/ cobra intake.

 

[Caboose302]

Wife has a 95 with Trick Flow intake, GT40P heads, stock rockers and E303 cam with some minor bolt ons and made 273 rwhp. Yes the number cams are outdated but there's a reason they still sell them. They work pretty decent. If they were junk they wouldn't sell them because no one would buy them.

 

[TLSF150]

Thanks for the replys.. I was planning on running 1.7s so im glad those will work but everytime I search for what type I need some people say 5/16 pedestal mount and some say 7/16 stud mount so which one is right?

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[CC'S95GT]

it depends on if you want to get the heads machined for stud mount.
stock replacement is pedestal. and are direct bolt down. The pedestals are pressed into the head and under high HP can pull out of the head.
Studs are screwed into the head. Rockers need to be shimmed.

 

[Win]

There a pedestal 5/16

you can have them drilled to a 7/16 stud also if you want to

 

[Addermk2]

stock replacement is pedestal. and are direct bolt down. The pedestals are pressed into the head and under high HP can pull out of the head.

Um... What?

Horsepower has nothing to do with it.
Pedestal rockers bolt down, they are not pressed.

You can buy 3/8" conversion studs for your pedestal mount heads, then you could buy my Comp Cams pro magnum rockers for super cheap. (its actually a very good option)

 

[TLSF150]

Um... What?

Horsepower has nothing to do with it.
Pedestal rockers bolt down, they are not pressed.

You can buy 3/8" conversion studs for your pedestal mount heads, then you could buy my Comp Cams pro magnum rockers for super cheap. (its actually a very good option)

Send me a PM with a price I may be interested

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[TLSF150]

Picked these up after work for 150

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[Caboose302]

Ooo... Pretty!

 

[Addermk2]

Those look like stud mount.

 

[TLSF150]

They are 5/16 pedestal mount

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[99GreenStang]

you know whats amazing lol? They find a way to sell us some of the damn prettiest parts of the motor ( Roller rockers ) and no one can see them!!!! WE NEED CLEAR VALVE COVERS WITH OIL SHIELDS LOL

 

[TLSF150]

you know whats amazing lol? They find a way to sell us some of the damn prettiest parts of the motor ( Roller rockers ) and no one can see them!!!! WE NEED CLEAR VALVE COVERS WITH OIL SHIELDS LOL

Dude I know.. I swear ive always thought the big aluminum rockers were the best looking part of a motor lmao

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