valve lift with 1.7's and tfs cam?

Coupe50h · 03-12-2003, 11:20 PM

Tfs #1 cam, .499/510 intk/ex

Now what will lift be with 1.7's? is it out of the question with stock pistons and gt-40 heads? or is it worth at least checking with clay? im real close to ordering one?
thanx for any help...

btw, started pulling belt, radiator, upper intake today, slowly but surely getting ready for these heads.

Coupe Devil · 03-12-2003, 11:30 PM

Ive got a set of Gt-40 heads im gonna put on my 306 with 86 style pistons. ( not valve relieved liek the 87+) I am wanting to rubn the trick flow stage 1 cam as well. If you run this and check the clearances with Clay please let me know what kinda measurements you get. It will be a long time before I get mine together ...

Thanks
Bradley

Coupe50h · 03-12-2003, 11:50 PM

Well clay wont tell me the actual clearance, but im afraid of 1.7's putting the exhaust lift past .530, and thats asking for trouble on stock pistons,

if you have 86 pistons coupe devil, they will not work without notching, you could probaly buy new pistons and save the hassle.

Shogun · 03-13-2003, 01:00 AM

I think the TFS cam is calculated at 1.6's for those lift numbers. You'll have to check the "@.050" lift on the cam card and then mulitply that by 1.7 to get the new lift. My buddy is running a TFS1 cam with TFS heads @ 1.6 with np. Very snappy cam too I might add! motor wraps up quick! Not sure about the GT-40's though. But it is always a good idea to clay...just to be sure.

gtsr515 · 03-13-2003, 01:10 AM

1.7 rockers are .30 more than 1.6's........there you go......

Jay

Coupe50h · 03-13-2003, 08:38 AM

ok, so i guess my question is, what is the max allowed on stock pistons, can i get away with .540?

sn95gt19 · 03-13-2003, 11:50 AM

Quote:

Originally posted by Coupe50h
ok, so i guess my question is, what is the max allowed on stock pistons, can i get away with .540?

ive seen it done, but i have also seen the same person smack a few of the valves.
just clay it and go from there

Murdock · 03-13-2003, 12:10 PM

With the 1.7's the lift will be .530 intake/.542 exhaust. A clay test will tell the exact clearance.

Murdock

Coupe50h · 03-13-2003, 10:44 PM

I talked to a guy that said he's done this combo with e7's, he said he has also heard of people banging valves, i might just have to buy new rockers.

03-12-2003, 11:30 PM	#2
Coupe Devil Moderator Join Date: Mar 2001 Location: Myrtle Beach SC Posts: 1,643	Ive got a set of Gt-40 heads im gonna put on my 306 with 86 style pistons. ( not valve relieved liek the 87+) I am wanting to rubn the trick flow stage 1 cam as well. If you run this and check the clearances with Clay please let me know what kinda measurements you get. It will be a long time before I get mine together ... Thanks Bradley __________________ 1990 GT, 347, TFS TW Heads, TFS Cam, TFS Track heat, Twin turbos, FMIC, T5. Built Ford Tough Moderator

03-12-2003, 11:50 PM	#3
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Well clay wont tell me the actual clearance, but im afraid of 1.7's putting the exhaust lift past .530, and thats asking for trouble on stock pistons, if you have 86 pistons coupe devil, they will not work without notching, you could probaly buy new pistons and save the hassle. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

03-13-2003, 01:00 AM	#4
Shogun Registered Member Join Date: Feb 2002 Location: Nebraska Posts: 86	I think the TFS cam is calculated at 1.6's for those lift numbers. You'll have to check the "@.050" lift on the cam card and then mulitply that by 1.7 to get the new lift. My buddy is running a TFS1 cam with TFS heads @ 1.6 with np. Very snappy cam too I might add! motor wraps up quick! Not sure about the GT-40's though. But it is always a good idea to clay...just to be sure. __________________ Proud RHC member #99 1990 Mustang GT Trick Flow heads,F303,Mac cold air,FMS 65mm tb,73mm ma,FMS 1.6,GT-40 intake,MSD igintion,NOS Big Shot@150,Mac equal shorties,Mac h-pipe,American Thunder flows,Centerforce dual friction,TTC 3550,alm drive shaft, 3.73's, HPM subframes, k-member brace, strut tower brace.. amongst others.

03-13-2003, 01:10 AM	#5
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	Lift 1.7 rockers are .30 more than 1.6's........there you go...... Jay __________________ Remember...2nd place is 1st place for losers!

03-13-2003, 08:38 AM	#6
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	ok, so i guess my question is, what is the max allowed on stock pistons, can i get away with .540? __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

03-12-2003, 11:20 PM	#1
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	valve lift with 1.7's and tfs cam? Tfs #1 cam, .499/510 intk/ex Now what will lift be with 1.7's? is it out of the question with stock pistons and gt-40 heads? or is it worth at least checking with clay? im real close to ordering one? thanx for any help... btw, started pulling belt, radiator, upper intake today, slowly but surely getting ready for these heads. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

03-13-2003, 12:10 PM	#8
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	With the 1.7's the lift will be .530 intake/.542 exhaust. A clay test will tell the exact clearance. Murdock __________________ LARZRACECARS larzracecars.com

03-13-2003, 10:44 PM	#9
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	I talked to a guy that said he's done this combo with e7's, he said he has also heard of people banging valves, i might just have to buy new rockers. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear