1,72 rockers with stock head and cam?

02-08-2001, 06:36 AM

Is this a good idea? Or should I wait until I have other (alu) heads and another cam?

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-87 GT, K&N, 5-speed, Walker exhaust, no air silencer. timing
75000miles. This vinter 3,55 and mac 15/8 and H-pipes
14,61 and 95,59mph

Rick 91GT · 02-08-2001, 07:16 AM

They will be fine with the stock set-up, it will make the ,444 lift stock cam act like a .474 lift cam. On a nice set od alum. heads I would get stud mount and a set of 1.6's. the 1.7's put a lot of extra strain on the valve train which can hurt you when you have a nice big cam.

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My Ride Check Out My Site 91GT, Holley SysteMAX II Kit-Heads 2.02" x 1.60",Full MAC exhaust 1-5/8" Long tubes, 2-1/2" O.R H-Pipe, 2 1/2" cat back, 12" K&N Filter, RNH PERFORMANCE Ram Air, Ron Davis Radiator, Full Suspension,3:73's, Welds, Best on new motor-12.60 @ 108, no traction 1.98

Green92LX · 02-08-2001, 10:04 AM

Personally, I would hold off on doing the rockers until you can afford to do the rest of the mods. My reasoning is that it would suck if you bought the 1.7's and then couldn't use them with whatever your next upgrades will be.....(cam, heads, etc.)

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1992 5.0 LX, Edelbrock 6037 Heads, Cobra Intake,E-303, 1.6 Roller Rockers,65MM Holley TB, 75 MM Pro M Mass Air, 190 LPH FP w/ 24 lb injectors,BBK equal length shorties,offroad h-pipe,Mac Flowpath Mufflers, Pro 5.0, 3.73's,Motorsport "C" springs,welded subframe connectors, Ponies w/ 225/50 Nittos, 93 Cobra Spoiler

Daily driver: 89 Coupe with 205K plus, BBK shorties,offroad h-pipe,2-chamber flowmasters with dumps, cut and welded stock shifter...and it runs like a champ.

StreetStang37 · 02-08-2001, 12:50 PM

Also, I dont think they will fit under stock valve covers, and I read it could be bad on high milage engines cuz.... I forget, it just is. I'll go look at the book and quote them and post it later.

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1993 Mustang GT - March Ram Air, K & N filter charger, Pullies, Super Competition Hooker Headers, 2 1/2 in. mendrel bent cat back, High Flow H-Pipe, Pro 5.0 Power Tower

Green92LX · 02-08-2001, 12:54 PM

As far as the valve covers go, you have to gring out the supports in the intake side as well as take out the oil baffle and grind out its remains too. I'm happy my application called for 1.6's....much easier, just take out the baffle..two little screws

------------------
1992 5.0 LX, Edelbrock 6037 Heads, Cobra Intake,E-303, 1.6 Roller Rockers,65MM Holley TB, 75 MM Pro M Mass Air, 190 LPH FP w/ 24 lb injectors,BBK equal length shorties,offroad h-pipe,Mac Flowpath Mufflers, Pro 5.0, 3.73's,Motorsport "C" springs,welded subframe connectors, Ponies w/ 225/50 Nittos, 93 Cobra Spoiler

Daily driver: 89 Coupe with 205K plus, BBK shorties,offroad h-pipe,2-chamber flowmasters with dumps, cut and welded stock shifter...and it runs like a champ.

Rick 91GT · 02-08-2001, 01:36 PM

with 75,000 miles you should be Ok putting them on, I added mine at 80,00 and I cahecked all my springs which were in good condition. I took them off at 160,000 miles wjhen I swapped in my new motor and sold them to a guy who offered me a $100.00 and he new how many miles were on them

withamc · 02-08-2001, 01:56 PM

You can get the Crane 1.7 RR's. They will fit under the stock valve covers if you just remove the baffles. Then when you upgrade, if you get the Crane 2031, which I am ordering, it is designed to work with 1.7 RR's.

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86 GT, GT40P heads, Cobra cam, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s.
**************
Crane 2031 on order

Dangerous Dave · 02-08-2001, 05:19 PM

Don't do it...ran my car without them, then ran it with them, then ran with out them again and I was right. No difference in timeslips. Take Green92LX's advice. Most aftermarket cams and heads are designed to run 1.6's anyway. Wait till you make that swap to get rollers. If money is burning a hole in your pocket then get something to help the suspension LCA's or subframes or whatever. Can never go worng with making the chassis stronger. I had near same setup as you but I must be a little lighter or something cause I ran 13.60's with stock motor.

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1988 GT-under construction

02-09-2001, 08:08 AM

Thank you! I save the money... Another thing! How much can I mill my stock heads and how much is it worth in torque/hp. We have 95-98 octane petrol in sweden.
I want to go 13,5 with stock heads, Cam and intake........

------------------
-87 GT, K&N, 5-speed, Walker exhaust, no air silencer. timing
75000miles. This vinter 3,55 and mac 15/8 and H-pipes
14,61 and 95,59mph

Dangerous Dave · 02-10-2001, 02:43 AM

Easy to go that fast with stock heads, intake, and cam--you can mill heads .030 but I would not go any further than that because of the deck thickness of the head-you'll blow head gaskets left and right.

02-08-2001, 06:36 AM	#1
joakim Guest Posts: n/a	1,72 rockers with stock head and cam? Is this a good idea? Or should I wait until I have other (alu) heads and another cam? ------------------ -87 GT, K&N, 5-speed, Walker exhaust, no air silencer. timing 75000miles. This vinter 3,55 and mac 15/8 and H-pipes 14,61 and 95,59mph

02-08-2001, 07:16 AM	#2
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	They will be fine with the stock set-up, it will make the ,444 lift stock cam act like a .474 lift cam. On a nice set od alum. heads I would get stud mount and a set of 1.6's. the 1.7's put a lot of extra strain on the valve train which can hurt you when you have a nice big cam. ------------------ My Ride Check Out My Site 91GT, Holley SysteMAX II Kit-Heads 2.02" x 1.60",Full MAC exhaust 1-5/8" Long tubes, 2-1/2" O.R H-Pipe, 2 1/2" cat back, 12" K&N Filter, RNH PERFORMANCE Ram Air, Ron Davis Radiator, Full Suspension,3:73's, Welds, Best on new motor-12.60 @ 108, no traction 1.98

02-08-2001, 10:04 AM	#3
Green92LX Registered Member Join Date: Jun 1999 Location: North Haven,CT Posts: 336	Personally, I would hold off on doing the rockers until you can afford to do the rest of the mods. My reasoning is that it would suck if you bought the 1.7's and then couldn't use them with whatever your next upgrades will be.....(cam, heads, etc.) ------------------ 1992 5.0 LX, Edelbrock 6037 Heads, Cobra Intake,E-303, 1.6 Roller Rockers,65MM Holley TB, 75 MM Pro M Mass Air, 190 LPH FP w/ 24 lb injectors,BBK equal length shorties,offroad h-pipe,Mac Flowpath Mufflers, Pro 5.0, 3.73's,Motorsport "C" springs,welded subframe connectors, Ponies w/ 225/50 Nittos, 93 Cobra Spoiler Daily driver: 89 Coupe with 205K plus, BBK shorties,offroad h-pipe,2-chamber flowmasters with dumps, cut and welded stock shifter...and it runs like a champ.

02-08-2001, 12:50 PM	#4
StreetStang37 Registered Member Join Date: Dec 2000 Location: San Jose, California USA Posts: 275	Also, I dont think they will fit under stock valve covers, and I read it could be bad on high milage engines cuz.... I forget, it just is. I'll go look at the book and quote them and post it later. ------------------ 1993 Mustang GT - March Ram Air, K & N filter charger, Pullies, Super Competition Hooker Headers, 2 1/2 in. mendrel bent cat back, High Flow H-Pipe, Pro 5.0 Power Tower

02-08-2001, 12:54 PM	#5
Green92LX Registered Member Join Date: Jun 1999 Location: North Haven,CT Posts: 336	As far as the valve covers go, you have to gring out the supports in the intake side as well as take out the oil baffle and grind out its remains too. I'm happy my application called for 1.6's....much easier, just take out the baffle..two little screws ------------------ 1992 5.0 LX, Edelbrock 6037 Heads, Cobra Intake,E-303, 1.6 Roller Rockers,65MM Holley TB, 75 MM Pro M Mass Air, 190 LPH FP w/ 24 lb injectors,BBK equal length shorties,offroad h-pipe,Mac Flowpath Mufflers, Pro 5.0, 3.73's,Motorsport "C" springs,welded subframe connectors, Ponies w/ 225/50 Nittos, 93 Cobra Spoiler Daily driver: 89 Coupe with 205K plus, BBK shorties,offroad h-pipe,2-chamber flowmasters with dumps, cut and welded stock shifter...and it runs like a champ.

02-08-2001, 01:36 PM	#6
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	with 75,000 miles you should be Ok putting them on, I added mine at 80,00 and I cahecked all my springs which were in good condition. I took them off at 160,000 miles wjhen I swapped in my new motor and sold them to a guy who offered me a $100.00 and he new how many miles were on them

02-08-2001, 01:56 PM	#7
withamc Registered Member Join Date: Aug 2000 Location: Thousand Oaks, CA Posts: 396	You can get the Crane 1.7 RR's. They will fit under the stock valve covers if you just remove the baffles. Then when you upgrade, if you get the Crane 2031, which I am ordering, it is designed to work with 1.7 RR's. ------------------ 86 GT, GT40P heads, Cobra cam, 1.7 RR's, Cobra intake, 65mm TB, 73mm Vortech, 24# injectors, MAC GT40P headers, 2-1/2" BBK H-pipe (w/cats), Flowmasters, 3.55s. ************** Crane 2031 on order

02-08-2001, 05:19 PM	#8
Dangerous Dave Registered Member Join Date: Sep 1999 Location: Minneapolis, MN Posts: 121	Don't do it...ran my car without them, then ran it with them, then ran with out them again and I was right. No difference in timeslips. Take Green92LX's advice. Most aftermarket cams and heads are designed to run 1.6's anyway. Wait till you make that swap to get rollers. If money is burning a hole in your pocket then get something to help the suspension LCA's or subframes or whatever. Can never go worng with making the chassis stronger. I had near same setup as you but I must be a little lighter or something cause I ran 13.60's with stock motor. ------------------ 1988 GT-under construction

02-09-2001, 08:08 AM	#9
joakim Guest Posts: n/a	Thank you! I save the money... Another thing! How much can I mill my stock heads and how much is it worth in torque/hp. We have 95-98 octane petrol in sweden. I want to go 13,5 with stock heads, Cam and intake........ ------------------ -87 GT, K&N, 5-speed, Walker exhaust, no air silencer. timing 75000miles. This vinter 3,55 and mac 15/8 and H-pipes 14,61 and 95,59mph

02-10-2001, 02:43 AM	#10
Dangerous Dave Registered Member Join Date: Sep 1999 Location: Minneapolis, MN Posts: 121	Easy to go that fast with stock heads, intake, and cam--you can mill heads .030 but I would not go any further than that because of the deck thickness of the head-you'll blow head gaskets left and right.