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Old 02-08-2012, 07:52 AM   #1
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stock cam?

I'm really on a tight budget and have an aod transmission. I have heard that if I want to go with a new cam that I would also need a new torque converter. With my family obligations that type of cost isn't in the cards yet. So my question is can I run a set of gt40p heads and intake on the stock Ho cam without upgrading the torque converter? This car isn't for track use, just looking to free up some ponies at a budget cost. If it works, I would be using a 70 mm tb, upgrading to 24lb injectors with mass air to match. Will this combo work?
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Old 02-08-2012, 08:42 AM   #2
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Yes but you may need to retune your car for the upgrades that you put in it!!!
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Old 02-08-2012, 09:21 AM   #3
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Originally Posted by WhiteCobra94
Yes but you may need to retune your car for the upgrades that you put in it!!!
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Old 02-08-2012, 09:23 AM   #4
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Re: stock cam?

It'll work fine
you could also go with some Cobra 1.7 rockers ,they increase lift a bit and are good for a solid 10 RWHP Gain ....
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Old 02-08-2012, 01:19 PM   #5
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Thanks everyone. I think this how I'm going to have to go with it for now.
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Old 02-08-2012, 06:18 PM   #6
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Been looking at roller rockers. Do I need stud mount or pedestal mount for gt40p heads? Also what size, 3/8"?

---------- Post added at 08:18 PM ---------- Previous post was at 08:17 PM ----------

Oops forgot to ask if aluminum or stainless is recommended.
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Old 02-08-2012, 06:40 PM   #7
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Quote:
Originally Posted by 5.slow
Been looking at roller rockers. Do I need stud mount or pedestal mount for gt40p heads? Also what size, 3/8"?

---------- Post added at 08:18 PM ---------- Previous post was at 08:17 PM ----------

Oops forgot to ask if aluminum or stainless is recommended.
Pedestal
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Old 02-08-2012, 07:21 PM   #8
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the aluminum are lighter but thats about it.
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Old 02-08-2012, 08:09 PM   #9
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Re: stock cam?

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the aluminum are lighter but thats about it.
One of the SS rocker arm manufacturers claims theirs are lighter on the valve than the aluminum and stronger. Comp Cams I think, not sure how true that is.
The advantage of the aluminum arms is that they help dampen some of the valvetrain harmonics, which is always a good thing.
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Old 02-08-2012, 08:35 PM   #10
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One of the SS rocker arm manufacturers claims theirs are lighter on the valve than the aluminum and stronger. Comp Cams I think, not sure how true that is.
The advantage of the aluminum arms is that they help dampen some of the valvetrain harmonics, which is always a good thing.
alot of the strenght also comes in the design of the rocker .they make aluminum rr that can hold over 1000+ valve spring pressure.but ss is a stronger metal so i can see that.
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Old 02-15-2012, 06:57 AM   #11
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Found some used gt40p heads for $250. They haven't been cleaned yet but it looks like they may have been rebuilt not too long ago because the springs still have those paint lines on it and the plugs looks rather new. I found a machine shop that said they would do a valve job on them for 250-300. Is that the going price and what is usually included in a standard valve job?
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Old 02-15-2012, 12:34 PM   #12
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Re: stock cam?

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Found some used gt40p heads for $250. They haven't been cleaned yet but it looks like they may have been rebuilt not too long ago because the springs still have those paint lines on it and the plugs looks rather new. I found a machine shop that said they would do a valve job on them for 250-300. Is that the going price and what is usually included in a standard valve job?
Disassemble and clean the heads, valves, etc.
Inspect the valves, seats and valve guides.
Grind the valves and seats.
Lap the valves and seat together.
Reassemble the heads with new valve seals.


Replacing any out of spec valves, seats or guides usually costs extra.
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Old 02-15-2012, 01:45 PM   #13
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Quote:
Originally Posted by 5.slow
Found some used gt40p heads for $250. They haven't been cleaned yet but it looks like they may have been rebuilt not too long ago because the springs still have those paint lines on it and the plugs looks rather new. I found a machine shop that said they would do a valve job on them for 250-300. Is that the going price and what is usually included in a standard valve job?
Is that a good price. Ima bout 2 buy some heads and Jus wondering...not gt40 thoe... Edelbrock stud mounted
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Old 02-15-2012, 02:16 PM   #14
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Re: stock cam?

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Is that a good price. Ima bout 2 buy some heads and Jus wondering...not gt40 thoe... Edelbrock stud mounted
Personally, I wouldn't pay that for them.
That price along with the rebuild is getting close to the cost (a little over $700) of a new set of the cheaper Pro Comp aluminum heads that will flow much better.


The Edelbrock heads are pretty good heads. I have a set of the Performer RPM heads on my car and I've been very pleased with them.
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Old 02-15-2012, 02:42 PM   #15
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Old 02-15-2012, 05:31 PM   #16
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Everything I have read said that those heads are junk and not to buy them. Are they actually ok? There is so many differing opinions its crazy.
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Old 02-15-2012, 05:36 PM   #17
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Re: stock cam?

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Everything I have read said that those heads are junk and not to buy them. Are they actually ok? There is so many differing opinions its crazy.
All I can tell you for sure is that my cousin has used them on his BBC engines and he hasn't had any problems with them.

At least some have used them with good results.

400 HP 5.0

500 HP 347

- Video

9.99 Sec BBF w/Pro Comp Heads - Video

Pro Comp Head Test
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Old 02-15-2012, 08:32 PM   #18
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Thanks for all the info, I guess I have some decisions to make. Hopefully I will have all the parts I need collected within the next few months to get started. I may even attempt it myself.
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Old 02-17-2012, 02:17 PM   #19
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Gonna attempt the head and intake swap in the next month or so. I can get a set of 30lb injectors cheap. Will they be too big for a mildly modded engine? Or should I get 24 instead? Thanks again for all the help.
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Old 02-17-2012, 04:26 PM   #20
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Re: stock cam?

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Gonna attempt the head and intake swap in the next month or so. I can get a set of 30lb injectors cheap. Will they be too big for a mildly modded engine? Or should I get 24 instead? Thanks again for all the help.
Get the 24's instead. There's a couple of members on here who have some for sale.
Look in the Classifieds.
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Old 02-17-2012, 04:48 PM   #21
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Just to chime in but you would be happy with some 1.7 roller rockers. The stock cam is actually pretty good IMO
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Old 02-17-2012, 06:05 PM   #22
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Yeah that's my plan to use stock cam for right now and get the 1.7's. Thanks for the feedback.
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Old 02-17-2012, 08:50 PM   #23
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I've been searching for a good deal on some 1.7 rockers. Seems like a used set of pedestal mount are going for like 150 for Ford racing. I also see some proform rockers new for like 170ish. Anyone have any experience with.these?
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Old 02-18-2012, 07:22 AM   #24
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Quote:
Originally Posted by 5.slow
I've been searching for a good deal on some 1.7 rockers. Seems like a used set of pedestal mount are going for like 150 for Ford racing. I also see some proform rockers new for like 170ish. Anyone have any experience with.these?
Proform 1.7 rockers Maximum Spring Diameter are 1.500 in, idk what heads your running but if your springs are bigger the 1.5in you can't use them!!
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Old 02-18-2012, 08:14 AM   #25
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Re: stock cam?

How do I check the diameter of the springs? I'm assuming I just measure across the center correct?
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Old 02-18-2012, 09:31 AM   #26
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How do I check the diameter of the springs? I'm assuming I just measure across the center correct?
What heads do you have?
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Old 02-18-2012, 11:36 AM   #27
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I got a rebuilt set of p heads. Don't know the specs on the new springs though.
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Old 02-18-2012, 11:42 AM   #28
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I got a rebuilt set of p heads. Don't know the specs on the new springs though.
You should be fine but in for pull your valve covers off just check before you order

---------- Post added at 12:42 PM ---------- Previous post was at 12:38 PM ----------

My edelbrock performer head valve springs are 1.46 so I'm sure your fine!!!
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Old 02-18-2012, 12:40 PM   #29
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Cool thanks. I just want a mild build and wanting to save where I can.
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Old 02-24-2012, 08:02 AM   #30
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Ok guys opinion question here. I'm staying with my stock cam for now so I don't have to change my torque converter just yet and got some 1.7 cobra roller rockers. I fell into both gt40 and gt40p heads. Which ones should I go with? I will be selling the others. Thanks
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Old 02-24-2012, 10:46 AM   #31
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Pretty sure you want the gt-40's over the gt-40p. If I remember correctly, the 40p's require new spark plug wires due to them creating weird angles once the headers are installed. Not 100% sure tho
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Old 02-24-2012, 06:27 PM   #32
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You are partially correct I have the GT40p heads that I got out of a junkyard for $30 and I don't need special ones unless I run longtube headers ..good luck those heads are awesome
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Old 02-24-2012, 06:40 PM   #33
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the p heads make a little bit more power,but yes are a little more of a pain
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Old 02-24-2012, 07:59 PM   #34
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Thanks for all the comments. I currently have summit ceramic coated shorty headers and I was told that they are actually made by another company so I'm not sure how they would fit up with the p heads. Maybe I can mock it up and see how difficult it would be with them.
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Old 02-24-2012, 08:05 PM   #35
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thats a good idea.as long as you can get the plugs in you should be ok.it will probably be easier to use wires with 90* ends.and it would probably be a good idea to throw some protective heat booties on the wires incas they are touching the header.
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