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Topic: SO to HO rebuild (Read 1048 times) previous topic - next topic

SO to HO rebuild

anybody know if there were any weird 5.0 changes from 88 to 90? im using my 88 block and rebuilding it with the HO pistons, and while it's apart, i can also throw in the crank/rods from the HO if there better.

also, i dont know if they were undercut from factory for any kinda dumb reason like some of AMC's stuff was. bearings are like 25$ so its no big deal, just id like to do it once lol...

SO to HO rebuild

Reply #1 –
No weird changes
Fox-less at the moment

SO to HO rebuild

Reply #2 –
Ho stuff have forged internals check the crank resize the rods if necasary.Are you gonna have the block worked on ?
[SIGPIC][/SIGPIC]:ford:87 Turbo Coupe through the floor sub frame connectors, 5.8 swap Ford racing heads Harland sharp 1.6 rockers BBK shorty swap headers 2 1/2 BBk X pipe magnaflow ler's. Megasquirt 2 with 36lbs injectors on hurricane intake with 4150 throttle body.Tremec TKO 600 Quicktime blowsheild spec stage 3 clutch. 3.73 gears and still not done

SO to HO rebuild

Reply #3 –
If I remember right, the internals of an S.O engine are the same as the H.O except for the pistons and cam and double roller timing chain. More on the outside of the engine, like the heads, upper intake, t-body,and headers.
'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..

SO to HO rebuild

Reply #4 –
SOs had double chains too, as long as they were roller. HO's have E7 heads and SO's had E5s or E6s. The HO's also had larger TBs and upper intakes.
Internally the HO had forged pistons with valve releafs and a little dish, the SO had cast pistons with no releafs or dish.
88 Cougar LS 5.0 .030 over, ported E7s with GT40 valves & trickflow springs, Proform roller rockers, HO cam, removed air silencer, K&N filter, smog pump delete, 2.25" dual flowmasters, Pacestter H-pipe & headers, HO computer, 65mm TB, Explorer intake, 19# injecters, 3.45s, rebuilt posi, and TCI shift kit.

SO to HO rebuild

Reply #5 –
Quote from: Bruce M;356808
SOs had double chains too, as long as they were roller. HO's have E7 heads and SO's had E5s or E6s. The HO's also had larger TBs and upper intakes.
Internally the HO had forged pistons with valve releafs and a little dish, the SO had cast pistons with no releafs or dish.

Both of the '87 SO 5.0 I dissembled had std chain, the '88 did have roller... I don't think you'll find a E5 head on any SEFI SO, but you may find them on a early '87 HO...

SO to HO rebuild

Reply #6 –
I never found a double roller on a factory built 5.0. Maybe a replacement chain was a double roller (on the SO engines).
'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..

SO to HO rebuild

Reply #7 –
I don't remember mine having a dbl when it came apart
[SIGPIC][/SIGPIC]
***** Project "EVOLUTION" 1987 Cougar LS  & 1985 Cougar Convertible *****
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5.0 HO 306 roller block, machined GT-40P heads, Wiseco dished forged pistons, Eagle forged floating I-beam connecting rods, Lunati pushrods, ARP bolts, Scorpion aluminum 1.6 rockers, Comp Cams Magnum 266HR, Explorer intake, 65mm TB, MAF Conversion, 19# injectors, Ford Racing stainless P-headers, 2-1/2" cat-less exhaust w/ Flowtech Afterburner lers , SC AOD with 2800 BDR torque converter, 3.73 T-Lok rear, CHE rear control arms, full 2-1/2" frame w/1" jacking rails & seat supports, Rear disk brakes, Turbine wheels, All original interior w/ floor shift upgrade .......
Pretty much every panel on my 87 is new, rebuilt, or re constructed. :D
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SO to HO rebuild

Reply #8 –
My 88 had a double chain stock. I know that it had never been changed cause my car has been in the family since it was new. I have a complete repair history on the car. Maybe my car was just a fluck but it's not the first SO motor that I've torn into that had a double chain.
88 Cougar LS 5.0 .030 over, ported E7s with GT40 valves & trickflow springs, Proform roller rockers, HO cam, removed air silencer, K&N filter, smog pump delete, 2.25" dual flowmasters, Pacestter H-pipe & headers, HO computer, 65mm TB, Explorer intake, 19# injecters, 3.45s, rebuilt posi, and TCI shift kit.