Skip to main content ↑ ↓
Topic: GT40 iron heads and flat top pistons... (Read 2878 times) previous topic - next topic

GT40 iron heads and flat top pistons...

Reply #15 –
Thanks a lot.How much do these heads go for usually?If I can't use them,I'll sell them and try to at least get my money back.Thanks.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

GT40 iron heads and flat top pistons...

Reply #16 –
I've got the Explorer intake on it,and it's running great.How much horsepower would you guess the heads would make....if they will work?
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

GT40 iron heads and flat top pistons...

Reply #17 –
Quote from: vinnietbird
I've got the Explorer intake on it,and it's running great.How much horsepower would you guess the heads would make....if they will work?


Over the E6s I'd guess 35-40 hp with the stock HO cam, the Explorer intake and a 65mm T-body. You may need to increase the fuel pressure 3-4 lbs to get max HP. Ideally with head mods you should go with Mass Air.

I sold a well used set of the std GT40 irons for $300 about a year ago.

GT40 iron heads and flat top pistons...

Reply #18 –
I'll go get them.I may have to wait to install them,because I don't have anything for Mass Air yet.I was planning on that for next spring.Do you think the car would run well enough without Mass Air until then,or wait?I want more horsepower (doesn't everybody?),but have to go one step at a time.With the kids in school.and a LOT of expenses,that's just how it has to be.I'll start watching E-Bay and gathering parts,like the Mass Air wiring kit,Mass Air Sensor and intake tubing,then the computer.For now,the heads are on my list first while I have access to them.I have E7 Heads in the garage,but,i figured if I'm getting the GT40 heads,I'll go ahead and get the new seals in the E7's and only use them if the GT40 heads don't work out for me.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

GT40 iron heads and flat top pistons...

Reply #19 –
If I use the explorer cam with the GT40P heads, and the explorer intake...would that mess up the pistons?
'83 Cougar *the never ending project* warmed over 306 v8,c4,8.8 posi with 5 lug conversion
'91 mustang strictly street-in progress
'00 f150 7700-Mean Green: jet stage 1 chip,ported upper intake with 1" spacer,'04 Super Duty intake with injectors,summit racing short tube headers with true 2.5" duals with smithy's glasspacks!

GT40 iron heads and flat top pistons...

Reply #20 –
Well,I can get the heads for $100.00 if I pull them myself....NO PROBLEM !!!! I wonder if my combo ('86 H.O.,Explorer intake,Explorer GT40 heads) would run decent without Mass Air.Anybody?Turbo Coupe50?
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

GT40 iron heads and flat top pistons...

Reply #21 –
I dont understand something, If your going throught the trouble of changeing your heads why not just do a clay test and save your self the dought,  Every motor is different to say your not going to have PVC problems.  To many factors to take into account. I agree with coolcat that you wont but its better to be safe.

GT40 iron heads and flat top pistons...

Reply #22 –
I thought I already stated I was going to use the clay.My mistake.Yes,I plan on it.Cheap insurance.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

GT40 iron heads and flat top pistons...

Reply #23 –
Quote from: vinnietbird
Well,I can get the heads for $100.00 if I pull them myself....NO PROBLEM !!!! I wonder if my combo ('86 H.O.,Explorer intake,Explorer GT40 heads) would run decent without Mass Air.Anybody?Turbo Coupe50?


As long as you keep the HO cam and 19lb inj it should run fine on the S/D. You should install a adj fuel pressure regulator, and increase the F/P to 42-45 lbs to get max power out of the combo.

GT40 iron heads and flat top pistons...

Reply #24 –
I'll look around for one of those.A good used one would be nice right about now.I'll check E-Bay.Thanks a lot.TC50.I have a lot to give you credit for on my 'Bird.You've helped more than you know in the past few months.Thanks a lot.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..