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Author
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Topic: Roller rockers
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PWR HNGRY 302
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Member # 6000
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posted
 
 
I was thinking about putting on some 1.70 roller rocker arms on my 87 5.0. I heard these were a good mod for the money, are these something that could be also be used when i get alum. heads or will i have to buy new ones when i do? I also wanted to ask what is the diff. between 1.70 and 1.72 whats better? Whats a good company to get them from?
--Thanks--
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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92stangLX
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Member # 3252
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posted
1.7's are a good mod. They will give you some more valve lift w/o changing the cam. The diff between 1.7's and 1.72's is that 1.72's give you more valve lift.
You may not be able to re-use your rockers if you get new heads. It depends on what type of rockers your new heads use.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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PWR HNGRY 302
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Member # 6000
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posted
I see, so should i invest in the 1.72's? Whats a good brand?
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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TrickRacer50
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Member # 6345
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posted
I have Comp Pro Magnum Roller Rockers that are made of steel, not aluminum.
The problem is that the ones for stock heads are pedestal mount and the ones for after market heads are stud mount.
If you buy rockers for stock heads they won't work for after market heads.
Posts: 78 | From: NorCal | Registered: Dec 2005
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TrickRacer50
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Member # 6345
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posted
Also, be careful to make sure 1.7 or 1.72 rockers will not have interfearance problems.
Posts: 78 | From: NorCal | Registered: Dec 2005
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PWR HNGRY 302
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Member # 6000
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posted
quote:
Originally posted by TrickRacer50:
Also, be careful to make sure 1.7 or 1.72 rockers will not have interfearance problems.
What Kind of problems like having the stock valve covers?
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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hidnn.o.s.
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Member # 1219
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posted
I'd STONGLY suggest you get the FMS blue RR's. Depending on the heads you get you ABSOLUTELY CAN re-use them. Some heads allow you to, some do not. I have aluminum Edelbrocks which did allow me to re-use my RR's.
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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PWR HNGRY 302
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Member # 6000
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posted
FMS Blue 1.7's? How much do they go for?
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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hidnn.o.s.
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Member # 1219
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posted
quote:
Originally posted by PWR HNGRY 302:
FMS Blue 1.7's? How much do they go for?
New, $340.
Cranes etc are less expensive, BUT FOR A REASON.
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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FasterDamnit
Bad Attitude
Member # 442
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posted
If you have stock original valve springs w/ high mileage, the rockers may not help at all. My '92 w/ 110k miles had NO power difference after putting them on due to a valve float problem right at 5300rpm. Dyno tested before and after.
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'92 LX T5
Looked stock, went 11's 11.90 at 115mph.
'65 Mustang 347
www.fordmuscle.com
Livin' in the Carolina Pines
Posts: 2971 | From: NorCal | Registered: Sep 2001
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PWR HNGRY 302
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Member # 6000
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posted
Really so it might not even be worth it. But would the stock valve covers be a problem?
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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PWR HNGRY 302
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Member # 6000
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posted
So your saying that there was no power gain because you had I problem? I have a high milage motor but ut has no problems do you think it would be worth it?
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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ShiftyGT
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Member # 3862
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posted
If you have a high mileage motor you might think about rebuilding it. All the mods you do will yield that much more power on a fresh block.
If not a fresh block, you may check into rebuilding the heads with some stronger springs.
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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88DroptopGT
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Member # 2535
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posted
1.7R Pedestal mount rockers wouldn't do much on a high-mileage stock motored head.
Save up for some pullies, a better intake manifold, or some gears instead.
Posts: 3978 | From: 707 | Registered: Mar 2003
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TrickRacer50
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Member # 6345
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posted
quote:
Originally posted by ShiftyGT:
If not a fresh block, you may check into rebuilding the heads with some stronger springs.
Rebuilding the heads is not worth doing alone. If you put new or rebuilt heads on an old short block the car will start to burn oil.
You may have to remove the baffle in your stock valve covers to make the new RR's work. Also check clearance to make sure the vales do not hit the pistons.
I think gears would be a better choice if you do not have them.
Also, it is a waist of money to buy parts for a future engine unless you know EXACTLY what you will be building. IMHE
The cam in my stroker will not work with 1.7RR's and rthe heads require stud mount rockers as well.
Posts: 78 | From: NorCal | Registered: Dec 2005
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hidnn.o.s.
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Member # 1219
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posted
quote:
Originally posted by 88DroptopGT:
Save up for some pullies, a better intake manifold, or some gears instead.
Sounds more along the lines of what you are looking for ![[patriot]](graemlins/patriot.gif)
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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1FAST89GT
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Member # 5071
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posted
put an intake and t/b on there
Posts: 4915 | From: VALLEJO | Registered: May 2004
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PWR HNGRY 302
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Member # 6000
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posted
quote:
Originally posted by hidnn.o.s.:
quote:
Originally posted by 88DroptopGT:
Save up for some pullies, a better intake manifold, or some gears instead.
Sounds more along the lines of what you are looking for
I already have gears and pullies. An intake doesn't sound like a bad idea though.
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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PWR HNGRY 302
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Member # 6000
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posted
quote:
Originally posted by 1FAST89GT:
put an intake and t/b on there
Thats probably what i'll do.
[ January 18, 2006, 09:45 AM: Message edited by: PWR HNGRY 302 ]
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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