85 block vs 89 block

backusbs · May 1st, 2011, 10:45 PM

Ive heard all kinds of things about the different year blocks. I have an 85 roller and a 89 roller. which is better?

fogged306 · May 1st, 2011, 11:59 PM

Both the same as far as strength goes. Not sure, but the 85 may not be tapped for the lifter hold down for roller lifters.

Ohsplat · May 2nd, 2011, 12:40 AM

The 85 is a roller block? I didnt think they had roller blocks in 85. If you have a flat tappet 85 block vs a roller 89 block the difference with the same setup would be about 20-30 horsepower and a longer life in favor of the 89. The roller lifter allows the cam to have a longer arch on it causing valves to stay at max lift longer producing more power. In order to put a roller cam in a non roller block you need to either have the lifter ports ground down to allow the use of the spider, or use special roller lifters that have a link bar on them keeping them from turning.

Hope I was right on all that.

ryanw · May 2nd, 2011, 12:53 AM

85 mustangs had roller cams(blocks), if im remembering right and i do believe it was the first year for mustangs

Ohsplat · May 2nd, 2011, 12:55 AM

should be no difference then.

ryanw · May 2nd, 2011, 01:10 AM

yep i was right 85 mustang first year of roller cam, I should have know for a fact do to me owning an 85gt, but i pulled this out as proof any ways

Another new grille design came along for the 1985 model year featuring a single large slit between the two pairs of headlights. The GT was treated to a new set of 15-inch cast-aluminum wheels shod with P225/60VR15 Goodyear Eagle "Gatorback" tires, and thanks to a serpentine single belt accessory drive system and revised roller cam, the 5.0 HO engine was now making a full 210 horsepower in four-barrel carbureted form.

Ohsplat · May 2nd, 2011, 01:18 AM

heheh a FULL 210! Wish we were back in those days when 210 was alot. Hell the new scion has a 190hp naturally aspirated 4 banger this year. The mustang V6 is at 300hp. gonna take alot to get my 83 up to par with a new gt LOL.

ryanw · May 2nd, 2011, 01:21 AM

well the 84gt mustang only had like 165hp so it was a good jump in power...lol

Ohsplat · May 2nd, 2011, 01:34 AM

mines a 83

Production Numbers:
66B 2dr Sedan: 33,201
61B 3dr Hatchback: 64,234
66B 2dr Convertible: 23,438
Total: 120,873

Available Engines:
2.3L 2V 4cyl 88hp
2.3L EFI 4cyl 145hp (Turbo GT)
3.8L 2V V-6 112hp
5.0L 4V V-8 175hp <---- Gigiddy gigiddy!

ryanw · May 2nd, 2011, 01:40 AM

Originally Posted by Ohsplat

mines a 83

Production Numbers:
66B 2dr Sedan: 33,201
61B 3dr Hatchback: 64,234
66B 2dr Convertible: 23,438
Total: 120,873

Available Engines:
2.3L 2V 4cyl 88hp
2.3L EFI 4cyl 145hp (Turbo GT)
3.8L 2V V-6 112hp
5.0L 4V V-8 175hp <---- Gigiddy gigiddy!

Here read this....its real nice info, i posted it last year
fox body history

Ohsplat · May 2nd, 2011, 01:52 AM

So the 83 was the first 5.0 HO, and the 1st year to offer the T5. Mine however Has a 4speed in the trunk. doubt ill use it.

ryanw · May 2nd, 2011, 02:09 AM

Originally Posted by Ohsplat

So the 83 was the first 5.0 HO, and the 1st year to offer the T5. Mine however Has a 4speed in the trunk. doubt ill use it.

naw...82 first H.O...if you really wanna call 157 Horse power an H.O.......lmao

May 1st, 2011, 10:45 PM	#1
backusbs Newbie 1989 mustang gt Join Date: Apr 2011 Location: Las Vegas Posts: 7 iTrader: 0 reviews	85 block vs 89 block Ive heard all kinds of things about the different year blocks. I have an 85 roller and a 89 roller. which is better?

May 2nd, 2011, 12:53 AM	#4
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	85 mustangs had roller cams(blocks), if im remembering right and i do believe it was the first year for mustangs __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

May 2nd, 2011, 01:10 AM	#6
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	yep i was right 85 mustang first year of roller cam, I should have know for a fact do to me owning an 85gt, but i pulled this out as proof any ways Another new grille design came along for the 1985 model year featuring a single large slit between the two pairs of headlights. The GT was treated to a new set of 15-inch cast-aluminum wheels shod with P225/60VR15 Goodyear Eagle "Gatorback" tires, and thanks to a serpentine single belt accessory drive system and revised roller cam, the 5.0 HO engine was now making a full 210 horsepower in four-barrel carbureted form. __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

May 2nd, 2011, 01:21 AM	#8
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	well the 84gt mustang only had like 165hp so it was a good jump in power...lol __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

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May 1st, 2011, 11:59 PM	#2
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Both the same as far as strength goes. Not sure, but the 85 may not be tapped for the lifter hold down for roller lifters.

May 2nd, 2011, 12:40 AM	#3
Ohsplat Enthusiast 1983GT No motor or trans Join Date: Nov 2010 Location: Middle River MD Posts: 540 iTrader: 0 reviews	The 85 is a roller block? I didnt think they had roller blocks in 85. If you have a flat tappet 85 block vs a roller 89 block the difference with the same setup would be about 20-30 horsepower and a longer life in favor of the 89. The roller lifter allows the cam to have a longer arch on it causing valves to stay at max lift longer producing more power. In order to put a roller cam in a non roller block you need to either have the lifter ports ground down to allow the use of the spider, or use special roller lifters that have a link bar on them keeping them from turning. Hope I was right on all that.

May 2nd, 2011, 12:55 AM	#5
Ohsplat Enthusiast 1983GT No motor or trans Join Date: Nov 2010 Location: Middle River MD Posts: 540 iTrader: 0 reviews	should be no difference then.

May 2nd, 2011, 01:18 AM	#7
Ohsplat Enthusiast 1983GT No motor or trans Join Date: Nov 2010 Location: Middle River MD Posts: 540 iTrader: 0 reviews	heheh a FULL 210! Wish we were back in those days when 210 was alot. Hell the new scion has a 190hp naturally aspirated 4 banger this year. The mustang V6 is at 300hp. gonna take alot to get my 83 up to par with a new gt LOL.

May 2nd, 2011, 01:34 AM	#9
Ohsplat Enthusiast 1983GT No motor or trans Join Date: Nov 2010 Location: Middle River MD Posts: 540 iTrader: 0 reviews	mines a 83 Production Numbers: 66B 2dr Sedan: 33,201 61B 3dr Hatchback: 64,234 66B 2dr Convertible: 23,438 Total: 120,873 Available Engines: 2.3L 2V 4cyl 88hp 2.3L EFI 4cyl 145hp (Turbo GT) 3.8L 2V V-6 112hp 5.0L 4V V-8 175hp <---- Gigiddy gigiddy!

May 2nd, 2011, 01:52 AM	#11
Ohsplat Enthusiast 1983GT No motor or trans Join Date: Nov 2010 Location: Middle River MD Posts: 540 iTrader: 0 reviews	So the 83 was the first 5.0 HO, and the 1st year to offer the T5. Mine however Has a 4speed in the trunk. doubt ill use it.

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