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Topic: Those who have done the HO conversion (Read 1480 times) previous topic - next topic

Those who have done the HO conversion

Did you check the piston/valve clearance?

If so, how did you do it. (clay method)?

Ive been getting conflicting information on the net, about the e7's only being safe about 50% of the time, with the flat top pistons.

Mike
Mike

Those who have done the HO conversion

Reply #1 –
With a stock H.O cam and the E-7 heads,you should be good to go.You should check the PTV clearance,though.I used clay.Had lot's of room left.The E303 is a little closer with the flat tops.
'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..

Those who have done the HO conversion

Reply #2 –
my current engine has a b cam and it ahs nearly a 1/4 of room well over an 1/8th for sure. I ran a 302 in my mustang with flat tops and a steeda #18 cam with no problems. used clay both times.
1981 ghia t-top: sed...
1983 cougar rb22 greddy turbo 5speed.
 

Those who have done the HO conversion

Reply #3 –
Look here and look under info. A lot of ?? can be answerd here.
 
http://coolcats.net/
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

Those who have done the HO conversion

Reply #4 –
Quote from: Kitz Kat;246024
Look here and look under info. A lot of ?? can be answerd here.
 
http://coolcats.net/


Yea, Ive already read that several times.  Ive also read on mustang forums of people with 86's (same as our motor, flat-top wise) having problems switching to E7's.

That is why I wanted to get it from the "horses" mouth with you guys.

The HO cams were revised slightly each year, do you think that could attribute to some difference?  Should I check wich HO cam I have?

Mike
Mike

Those who have done the HO conversion

Reply #5 –
I've said it once, I'll say it a thousand more times...S.O. pistons are dished...not flat tops...can we just get a sticky that's titled "SO PISTONS ARE DISHED"?...85/86 HO's as well as some early 87's in Mark VII's are the only true flat-topped piston 5.0's.  Even on those engines, E7's are fine with a stock HO cam...which gained 10* of duration on the intake side in late '88...both early and late cams work just fine.

Good luck,
Don
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Those who have done the HO conversion

Reply #6 –
I have true flat tops,E303,and ported E-7 heads.Rockin' !!!
'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..

Those who have done the HO conversion

Reply #7 –
E7's are virtally identical to E6's which is what is on our cars stock. The only real difference is the emissions bump.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

Those who have done the HO conversion

Reply #8 –
Quote from: Haystack;246062
E7's are virtally identical to E6's which is what is on our cars stock. The only real difference is the emissions bump.



But wasn't the only change for the stock Mustang HO switching from E6 to E7?  It got an extra MPG and 25 extra horses from that swap....  or am I missing something important?  If so, it wouldn't be the first time for me!
1988 Thunderbird Sport V8 - only 1 previous owner, and 110% bone stock so far... and sold to Nate!

Those who have done the HO conversion

Reply #9 –
Quote from: Haystack;246062
E7's are virtally identical to E6's which is what is on our cars stock. The only real difference is the emissions bump.


They are absolutely not virtually identical...entirely different combustion chambers...the E6 was Ford's early attempt at a high-swirl combustion chamber...the exhaust ports flow nearly the same...it's the intake side that is the real bottleneck...20-50cfm down on the E7's depending on test conditions.  Switching from E6's to E7's will not only improve flow, but bump compression also...which helps when you have an 8.4:1 C/R.  However the work involved with slappin' E7's on isn't really worth the marginal gain...iron GT40's or "P" heads FTW!

BTW, vinnie, was it you who previously described your pistons as "flat like kansas flat"? lol, if so, excellent description

-Don
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads