Is it possible to run 1.7 roller rockers on a stock short block with an HO cam? I found a set on eBay for a decent price but I'm not sure if the flat top pistons in the low-out put short block will pose a problem with piston to valve clearance. Can anyone check this for me since my car is sitting at home three hours away?
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-Matt
1968 Fairlane 500 - 1998 Camaro Z/28
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So do all HO engines have reliefs in the pistons?
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Oh and another question, if you don't mind me hitch hiking yout tread here. I should be able to put on a set of roller rockers and not have to change anything else, right?Comment
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yes you can put just the roller rockers on with no other alterations. As for the 1.72 with HO cam on a lopo, I know some people on here have that combination, scott does I think. I want to know also b/c I am doing an HO conversion for my 89 Towncar1989 Lincoln Town Car - "Anabelle" - Original block, .030 over with SpeedPro pistons, rods fitted with ARP hardware, FRPP +volume oil pump, GT-40 3bar heads, Crane 1.72 rockers, 89' Fox cam, 93' Cobra lower intake, Explorer upper and 65mm TB, 93' Lightning EGR spacer, K&N intake kit from a 4.0L Ranger, 19lb/hr injectors w/ 87 Mark VII ECM, cat/smog deletes, Big Brake conversion, 3.55 K-Code Trac-Lok/Disc brake rear axle, CVPI LCA's w/1" sway bar in rear, wagon front sway bar, BBK 2.5" off-road H-Pipe, Flowmaster super 40s, HPP wheels, 3G alternator w/LMR.com wiring kit, gear reduction starter conversion, Best 1/4 time: 16.0 @ 85mph.Comment
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Actually, scott runs an HO shortblock...
You shouldnt have a problem, You will still be under .500 lift, IIRC...1983 Grand Marquis 2Dr Sedan "Mercules"
Tremec TKO conversion, hydraulic clutch, HURST equipped!
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What about the Low-PO block like Nitro is running? Will they work for him? And will we need to upgrade the springs?Comment
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It shouldnt be a problem.
Updating the springs is never a bad idea...1983 Grand Marquis 2Dr Sedan "Mercules"
Tremec TKO conversion, hydraulic clutch, HURST equipped!
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1.7 rockers and a ho cam will work with the dished lopo pistons
1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
2006 Lincoln Town Car Signature. Stock for now
1989 Ford F-250 4x4 much much more to come, sefi converted so far.
1986 Toyota pickup with LSC wheels and 225/60/16 tires.
2008 Hyundai Elantra future Revcon toad
1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)
please be patient, rebuilding an empire!
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Thats what I was looking for. Awesome!Originally posted by lincolnmania
What kind of gains should I look for with the better rockers? And do I need to change anything else in the valve train to run them? I think this is the part: Crane Energizer Rocker Arms PN 44746-16
-Matt
1968 Fairlane 500 - 1998 Camaro Z/28
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according to Stu it will only give you about 2 HP but most others agree on about 10-15 due to the increase in valve lift and a reduction in friction.Originally posted by nitroracerThats what I was looking for. Awesome!Originally posted by lincolnmania
What kind of gains should I look for with the better rockers? And do I need to change anything else in the valve train to run them? I think this is the part: Crane Energizer Rocker Arms PN 44746-16
http://secondhandracing.com/Home.aspx
http://secondhandradio.com/
R.I.P. Jason P Harrill 6-12-06
http://www.grandmarq.net/vb/showthread.php?t=5634Comment
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We all know you cant use the words "Stu" and "HP" in the same sentance...Originally posted by "DuceAnAHalf
1983 Grand Marquis 2Dr Sedan "Mercules"
Tremec TKO conversion, hydraulic clutch, HURST equipped!
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:lol:
Of I were to go with 1.7ratio rollers and I upgraded my springs, would that cause my hydrolic lifter to be overcome? IE, would I need to change them as well?Comment
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you're lifters will be fine
RIP Jason P Harril, we'll miss ya bro
'80 Town Coupé
'84 Towncar - Teh Cobra TC, 408w powered
'16 Ram 1500 CC Outdoorsman, Hemi/3.92/8sp 4x4Comment
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SWEET!!! Good post Nitro!Comment
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No problem, just bored at college and lookin around on eBay.
-Matt
1968 Fairlane 500 - 1998 Camaro Z/28
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