This is topic better springs for GT40P's? in forum Tech Talk at Northern California Ford Owners  .


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Posted by Rickster (Member # 962) on :
 
What springs are you guys with GT40P's and bigger cams running? The trick is staying with stock valves & retainers...the exhaust installed height is diffrent than the intake, and this is presenting a problem for choosing a set of matched springs that ussually come in a set of 16...

I am trying to runna TFS stage 1 cam or possibly a stage 2?

P/N's please!
 

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Posted by mtbaughs (Member # 4052) on :
 
I bought a set of springs for my gt-40p heads; edelbrock part # 5822 but I am only going to be running an e-303 cam and the stock springs are fine so I've been told. If you want mine I'll sell em' just make sure to research them for your cam whichever one you go with. Pm me if your interested.
 

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Posted by 1FAST89GT (Member # 5071) on :
 
crane has a set and ford motorspaort also has a set both are in stock at Summit and give u a lift up to .580
 

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Posted by Glenn (Member # 520) on :
 
call this number and talk to dave, they do a lot of combo's with the gt40p heads. 661-823-2400

[ April 27, 2005, 07:10 PM: Message edited by: Glenn ]
 

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Posted by Rickster (Member # 962) on :
 
Thanks for the answers guys..

mtbaughs , thanks for the offer, but I think I'll pass on those. Looks like they don't allow a high enough lift...http://www.corral.net/forums/showthread.php?t=551840


1FAST89GT,
The problem with the kits at summit is that I am a complete valve train newbie (but learning slowly) and they don't list those kits you mentioned buy make and model (at least that I could find)...could you help a newb out and give me the part numbers?

Glenn, thanks for the lead!

I have spent the last week trying to figure out this valve train stuff. I even built a spreadsheet to calculate the seat pressure @ diffrent installed heights, open heights and were the coil bind limits are depending on the installed height and cam lift. The one missing piece I haven't figured out yet are the retainers.
I started this project assuming that
I would need to find two sets of 8 springs each, as the installed heights with the stock hardware are diffrent (measured 1.76 int./1.58 exh.). I wanted a seat pressure of about 120 and an open pressure of about 300. Well after running every spring I could find through my spreadsheet nothing was working, AND I cant seem to buy them in anything but sets of 16.
So I am assuming now that you would need to buy new retainers/locks to change the installed height, but this presents a whole new problem. Nowhere can I find detailed measurements on the retainer geometry and how it relates to the stock valves...so I can now find springs for the desired installed heights and pressures, but have no clue wich retainers are going to get me to that height, or close enough for some shim work. The retainers are also usually sold in sets of 16, so I would ASSUME that they are all the same, wich puts me right back in the same boat as before...diffrent heights for the exh./int. to get them all to the same height, I would have to shim like mad, or buy a cutting tool and start eating away at my heads and I'm not too keen on that route. When I started I was hoping that there would be some "magic" spring I could just pop into the existing hardware to clear the .563 exh. lift of the TFS 2 cam.....doesn't sound likely now

Thanks again for the help.
 

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Posted by mtbaughs (Member # 4052) on :
 

quote:

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mtbaughs , thanks for the offer, but I think I'll pass on those. Looks like they don't allow a high enough lift...http://www.corral.net/forums/showthread.php?t=551840

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