need help with 1.7 cobra rockers?

90dpscoupe · 05-10-2001, 12:12 AM

These are advertised pretty cheap 149-179$, will they fit on my stock stang? are they pedestal mount? if so will i see a gain, im looking for a tenth or at least 2 mph, this will be after i ditch my stock h-pipe for a o-r mac pipe.

thnx..

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

fiveohpatrol · 05-10-2001, 12:35 AM

not sure about the improvements with the rockers cause i havent tested mine yet but i've heard between 1-2 tenths, but it will be even better with an h-pipe too, why dont you use that money to put some gears in that thing, 3.73's will easily give you 2 tenths, looks like traction isnt much of a problem if you can hit a 1.9 60' on 225's, i wish i could do that

------------------
88 Notchback 5.0, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, Crane 1.7's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air kit, motorsport wires, MSD coil, upper and lower control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best time- 13.99@99.75, not yet tested times after rockers,intake or ported heads

90dpscoupe · 05-10-2001, 12:53 AM

The 1.9 i did when my car gave a slight bog, and it was fun ford shootout, in which they spray the track with vht, they do at every shootout, regarless i do consistent 2.00's no swaybar, but as for the 3.73's a friend of mine actually slowed down with 3.73's i dont know why? but im sure traction will become a problem when i do change grs thinking 4.10's now. thnx for the info...

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

withamc · 05-10-2001, 10:15 AM

I'm not sure if the Cobra 1.7s fit under stock valve covers but my Crane 1.7s do - that's why I chose them. Also they were pedestal mount.

jimberg · 05-10-2001, 10:20 AM

How much was your friend's car modified?

------------------
351W 89 Mustang GT Convertible

Dark Knight · 05-10-2001, 04:45 PM

cobra rockers are the same as the cranes.. doubt you'd pick up .2 though.. pulleys would be a better choice to knock time off.. even just the water pump and crank ones..

------------------
84 convt,'95 302,AFR's, performer
3.55's, underdrives stock shorties
stock cam, 1.7's
14.06@100.21, 255RWHP on a hot day
265 on the mph/weight chart

CJ's94GT · 05-10-2001, 09:01 PM

You might gain some top end but the roller rockers have it all over the stockers. They are also much cheaper than any 1.6 roller.

I had to go through three sets of Cranes before I found a good set of pedistals and even then I had to buy the replacement set for another $15. The pedistals I got with all my rockers were machined crooked so the tip didn't set square on the valve tip.

90dpscoupe · 05-10-2001, 10:53 PM

jimberg, his car was (stock)motor, and 273's, the 373s took him to 15.2 from 14.8, but maybe he just wasnt used to them.
he eventually put a cam and a holley intake on, and went to 13.6 in a lx hatch, the grs worked much better with some more topend power i guess.

Yea its funny that guy mention the pullies, my friend just told me today he has a water pump and crank pulley laying around he will give me, and i agree i will probaly see a bigger gain from these instead of the rockers....thnx

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

05-10-2001, 12:12 AM	#1
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	need help with 1.7 cobra rockers? These are advertised pretty cheap 149-179$, will they fit on my stock stang? are they pedestal mount? if so will i see a gain, im looking for a tenth or at least 2 mph, this will be after i ditch my stock h-pipe for a o-r mac pipe. thnx.. ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 13.9116(on 225/60/15 firehawks) Best mph: 98.17 Best 60': 1.9607 next mods: subframes, mac h-pipe

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05-10-2001, 12:35 AM	#2
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	not sure about the improvements with the rockers cause i havent tested mine yet but i've heard between 1-2 tenths, but it will be even better with an h-pipe too, why dont you use that money to put some gears in that thing, 3.73's will easily give you 2 tenths, looks like traction isnt much of a problem if you can hit a 1.9 60' on 225's, i wish i could do that ------------------ 88 Notchback 5.0, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, Crane 1.7's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air kit, motorsport wires, MSD coil, upper and lower control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best time- 13.99@99.75, not yet tested times after rockers,intake or ported heads

05-10-2001, 12:53 AM	#3
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	The 1.9 i did when my car gave a slight bog, and it was fun ford shootout, in which they spray the track with vht, they do at every shootout, regarless i do consistent 2.00's no swaybar, but as for the 3.73's a friend of mine actually slowed down with 3.73's i dont know why? but im sure traction will become a problem when i do change grs thinking 4.10's now. thnx for the info... ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 13.9116(on 225/60/15 firehawks) Best mph: 98.17 Best 60': 1.9607 next mods: subframes, mac h-pipe

05-10-2001, 10:15 AM	#4
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	I'm not sure if the Cobra 1.7s fit under stock valve covers but my Crane 1.7s do - that's why I chose them. Also they were pedestal mount.

05-10-2001, 10:20 AM	#5
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	How much was your friend's car modified? ------------------ 351W 89 Mustang GT Convertible

05-10-2001, 04:45 PM	#6
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	cobra rockers are the same as the cranes.. doubt you'd pick up .2 though.. pulleys would be a better choice to knock time off.. even just the water pump and crank ones.. ------------------ 84 convt,'95 302,AFR's, performer 3.55's, underdrives stock shorties stock cam, 1.7's 14.06@100.21, 255RWHP on a hot day 265 on the mph/weight chart

05-10-2001, 09:01 PM	#7
CJ's94GT Registered Member Join Date: Feb 2001 Location: Wichita,KS Posts: 59	You might gain some top end but the roller rockers have it all over the stockers. They are also much cheaper than any 1.6 roller. I had to go through three sets of Cranes before I found a good set of pedistals and even then I had to buy the replacement set for another $15. The pedistals I got with all my rockers were machined crooked so the tip didn't set square on the valve tip.

05-10-2001, 10:53 PM	#8
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	jimberg, his car was (stock)motor, and 273's, the 373s took him to 15.2 from 14.8, but maybe he just wasnt used to them. he eventually put a cam and a holley intake on, and went to 13.6 in a lx hatch, the grs worked much better with some more topend power i guess. Yea its funny that guy mention the pullies, my friend just told me today he has a water pump and crank pulley laying around he will give me, and i agree i will probaly see a bigger gain from these instead of the rockers....thnx ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,advncd ignition,3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 13.9116(on 225/60/15 firehawks) Best mph: 98.17 Best 60': 1.9607 next mods: subframes, mac h-pipe