10-22-2008, 11:18 PM | #1 |
5.slo stanger
Join Date: Jan 2007
Location: oxford alabama
Posts: 735
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roller rocker questions
if i am not mistaken the factory rocker arms are a 1.6 ratio i have also heard of people using 1.7 rollers for alil more lift and less friction can i use 1.7 rollers and not run into any trouble on a factory head carbed 91 5.0 and would i see any real world gains in power or will i be asting 125$or more.
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no mustangs anymore but i do have a 1jz swapped 83 supra |
10-22-2008, 11:21 PM | #2 |
3v's are slow
Join Date: Dec 2004
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Is this with stock pistons?
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10-23-2008, 04:27 AM | #3 |
Dayuuuuuuum!!!!!
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Location: Dallas GA
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an F cam and 1.7s will work.....but you should just save your money and buy better heads.
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86 Mustang Gt......Mods piling up in my garage.
07 F350 dooly.....Tows my fifth wheel |
10-23-2008, 05:31 AM | #4 |
Trunk Monkey
Join Date: Jun 2007
Location: Home
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If the car is stock,yeah,go ahead and put them on.It'll make a noticeable increase in power.
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Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS |
10-23-2008, 07:27 AM | #5 |
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1.7 roller rockers do make a difference. But, I don't think it's all that noticeable though..imo. They will add lift which is good for a couple of hp. but where they really benefit you is the reduction in friction over a factory stamped steel rocker. Takes less effort to open and close the valves, which "free's up" a few hp and with less friction, you'll have slightly lower oil temps. It's a good, cheap upgrade - but since you are running an F cam, you REALLY need to check your piston to valve clearance when you do it.
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10-23-2008, 08:02 AM | #6 |
Trunk Monkey
Join Date: Jun 2007
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Ok,I missed the F cam in his sig.I would'nt do it if you still have the stock valvesprings.
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Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS |
10-23-2008, 02:13 PM | #7 |
Senior Member
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the cost of springs and the rockers vs what you will pick up in hp gains aren't worth it in my opinion.
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86 Coupe aka the battle ship H/C/I, Nitrous, bla bla bla all on a 351 |
10-23-2008, 04:14 PM | #8 |
5.slo stanger
Join Date: Jan 2007
Location: oxford alabama
Posts: 735
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i knew the 1.7 would add a lil more lift but you said it might touch the piston would 1.6's do any good i figgured the only thing im really going to notice is gonna be that extras lil lift but if yall say not to ill def. go w/ the 1.6 and new valve springs
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no mustangs anymore but i do have a 1jz swapped 83 supra |
10-23-2008, 04:18 PM | #9 |
Senior Member
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its not guaranteed but for every .1 you change on the rocker its about .030 in lift give or take.
As stated above the 15 hp or so for the 300 bucks of parts doesnt seem legit, especially with the work in changing springs
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86 Coupe aka the battle ship H/C/I, Nitrous, bla bla bla all on a 351 |
10-23-2008, 05:43 PM | #10 |
Dayuuuuuuum!!!!!
Join Date: Dec 2004
Location: Dallas GA
Posts: 2,933
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save your cash and buy better heads....then be done with it
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86 Mustang Gt......Mods piling up in my garage.
07 F350 dooly.....Tows my fifth wheel |
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