This is topic gt40 heads on 86 block? in forum Tech Talk at Northern California Ford Owners  .


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Posted by 510.86.notch (Member # 9892) on :
 
I've heard some people say it will not work?some say it will no problem.anybody with experience with this feel free to chime in.thanks for any info.
 
Posted by v-town coupe (Member # 2771) on :
 
the deal with 86 motors is that there is no valve reliefs like the 87-95 motors. when putting on a set of GT40's you are putting on a head with a bigger valve thus reducing your valve to piston clearance. hopefully some one will chime in who has done or "tried" the swap. not sure if this is your DD. but you could always take the old heads off but the GT-40's on and clay it if you find no answer. if it doesnt work be ready to fly cut the pistons.
 
Posted by 510.86.notch (Member # 9892) on :
 
thanks.i'm thinking i am going to have to cut the pistons or go with a newer block.can anyone chime in on cutting the pistons?how hard and how much it cost?is it worth it?thanks for the input.
 
Posted by Duncan Motors (Member # 7045) on :
 
they sink the vavle higher in the head on those motors. its a pile in it self. get a newer lower end, then do what u want.
 
Posted by 510.86.notch (Member # 9892) on :
 
quote:
Originally posted by Duncan Motors:
they sink the vavle higher in the head on those motors. its a pile in it self. get a newer lower end, then do what u want.
yea that's what I've been reading and hearing.it really sucks the motor is so healthy,low miles and have had no major issues.guess i'll have to pull it and sell it.what year short block should i look for?90-93 also would need to be mass air converted?thanks for all the help.
 
Posted by Duncan Motors (Member # 7045) on :
 
87 to 93 is the best but 86 to 95 will work. a new wire harness and computer, and the pieces off the throttle body.
 
Posted by v-town coupe (Member # 2771) on :
 
as long as your not making any big changes you can put another motor in there. just because your using the later motor doesnt mean you will need to go mass air. aim for an 87-92 motor they were forged piston motors with valve reliefs.
 
Posted by 510.86.notch (Member # 9892) on :
 
quote:
Originally posted by Duncan Motors:
87 to 93 is the best but 86 to 95 will work. a new wire harness and computer, and the pieces off the throttle body.
ok.thanks.what about the 96 explorer motor.its definitely putting a hold on everything.i have alot of project stuff to do already.thanks again.

[ January 25, 2012, 06:43 PM: Message edited by: 510.86.notch ]
 
Posted by 510.86.notch (Member # 9892) on :
 
quote:
Originally posted by v-town coupe:
as long as your not making any big changes you can put another motor in there. just because your using the later motor doesnt mean you will need to go mass air. aim for an 87-92 motor they were forged piston motors with valve reliefs.
would it be smarter to convert it to mass air or leave speed density?i figured we would be in there with the motor out.all it is 96 gt40 setup with the normal boltons.thanks again for the information.
 
Posted by v-town coupe (Member # 2771) on :
 
yeah mass air is going to be better for sure! just wasnt sure what kind of budget your on. if you have the means to to buy and install everything to convert you to mass air do it!
 
Posted by 510.86.notch (Member # 9892) on :
 
thanks for all the help.going to have to make money for it.
 
Posted by v-town coupe (Member # 2771) on :
 
if it runs good good just turbo it and beat it till it blows then swap motors:
http://www.youtube.com/watch?v=qCm35kw39P8&feature=related
 
Posted by 510.86.notch (Member # 9892) on :
 
looks fun!
 
Posted by triple b (Member # 8763) on :
 
Even with another stock motor in there u need to check the piston to valve Clearence these motors are not big valve ready and u will be limited on cam selection
 
Posted by 510.86.notch (Member # 9892) on :
 
thanks its just a mild set up for my girl.so a alphabet cam or tfs1 will be good for me.thanks for the heads up.definitely will be check ptv clearance.
 




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