Up to how much lift can the........
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Mr. Rustypwnz
Advanced Member
Mr. Rustypwnz
Advanced Member
hmm id like to know as well then, I think its around 500 or more, I know I ran my b-cam with 1.72 rockers on my stock springed e7's. Ill shoot an e-mail to thumper.
Mr. Rustypwnz
Advanced Member
I got the goods, they will hold .500max!! so that means I have to stay with the bcam and the factory rockers and not my 1.72units until I buy his spring kit, well at least it will idle better now LOL.....
Mr. Rustypwnz
Advanced Member
either the tfs kit, which is around $140, or thumpers kit which $155 shipped, the tfs kit will support up to .600 lift, and I dont know how much the thumper kit will support, ill get back to ya on that one.
fivespeedsteed
20+ Year Stangneter 
Stock gt40p springs, or stock e7 springs? I know your using the gt40p heads but whitch stock springs are you using.
Heres my thread on the subject not too long ago. I have a bcam.
http://forums.stangnet.com/showthread.php?t=664648
Pretty much stock springs and are big no no. Not only because they cant handle alot of lift but because they will also be very old and have lost pressure. No matter if your swapping rr's, new cam, or replacing heads, id wait an extra paycheck and spen the 150 bucks for a nice tfs spring kit with all the retainers and have a machine shop install them at the correct height, pressure, etc.
Heres my thread on the subject not too long ago. I have a bcam.
http://forums.stangnet.com/showthread.php?t=664648
Pretty much stock springs and are big no no. Not only because they cant handle alot of lift but because they will also be very old and have lost pressure. No matter if your swapping rr's, new cam, or replacing heads, id wait an extra paycheck and spen the 150 bucks for a nice tfs spring kit with all the retainers and have a machine shop install them at the correct height, pressure, etc.
Mr. Rustypwnz
Advanced Member
right on, im going to install the thumper kit after christmas on the gt40p heads then, and run stock e7's for now then, I really dont want to screw the like new explorer engine that is going in here. now I just have to find some e7 mustang heads locally, ah that will be lots of fun!!
hmmm...i was going to get the TFS kit from summit for my P heads but just had a long talk with two of the guys at the summit store. They DID NOT want me to get the trick flow kit for some reason. 
something about the P heads being newer heads or somethin...i dunno honestly i just took their word for it. i told them i wanted to run my stock cam for awhile and maybe later down the road swap in a bigger cam so i wanted springs that could handle lift numbers in the low .5xx area. I ended up getting the kit from crane (#CRN-44308-1 i think)
http://store.summitracing.com/partd...4294924497+4294863036+400078+115&autoview=sku
max lift they said was .550, it was $113 compared to the trick flow $133 and i dont plan on using a ginormous cam on the P heads seeing as their flow levels off around .500 lift right?
should i take em back or what?!?
something about the P heads being newer heads or somethin...i dunno honestly i just took their word for it. i told them i wanted to run my stock cam for awhile and maybe later down the road swap in a bigger cam so i wanted springs that could handle lift numbers in the low .5xx area. I ended up getting the kit from crane (#CRN-44308-1 i think) http://store.summitracing.com/partd...4294924497+4294863036+400078+115&autoview=sku
max lift they said was .550, it was $113 compared to the trick flow $133 and i dont plan on using a ginormous cam on the P heads seeing as their flow levels off around .500 lift right?
should i take em back or what?!?
does the gt40p heads use dual springs? if they dont your heads would have to get machined to except a trickflow spring kit. I have the tfs track heat upgrade kit on twisted wedge heads and they are a double spring. Inner and outer springs and a damper inside as well. Unless of course you guys might be referring to some other spring kit trickflow makes.
310stanger said:
i believe this is the kit being reffered to:
http://store.summitracing.com/partd...4294924497+4294863036+400098+115&autoview=sku
My buddy had P heads with an X cam....we were worried about valve float on the dyno but didn't see any signs. I would say don't do it but then again i've seen it done...
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