1.6 Roller Rocker ????
06-04-2011, 03:00 PM
#1
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
1.6 Roller Rocker ????
Who, or how many out there are running 1.6 roller rockers on their TBI 305, with NO HEAD MODIFICATIONS??? Has anyone had pushrod clearance issues??? Thanks for any replies to this....Tom
06-07-2011, 11:27 AM
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Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: 1.6 Roller Rocker ????
my buddy ran some 1.6 on his 305 tpi with 416 heads but with a stock camshaft. with no problems. but that head design is different then the centerbolts.
06-07-2011, 06:59 PM
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Car: 90 Formula -- tot resto in progress
Engine: 350
Transmission: 700R4 w/ 2500 stall, by Owen @ ARD
Axle/Gears: 3.23 posi disc
Re: 1.6 Roller Rocker ????
Dude, where you at? 
Haven't seen you at the gas shop since it re-opened. PM me...
Most of the aftermarket 1.6 rollers are to wide for the stock center-bolt
head-covers -- the oil breather won't fit in between them.
I wound up going with some Crane's that are specifically for these GM heads.
And they were, as you might guess, price-ier than e-bay bargains.
Also the push-rod length is a bit different (shorter if I recall) to keep the
roller properly centered over the valve. Off-center will cause excessive
side-wear on the valve guides. At least thats the theory.
I'm pretty close to getting mine running -- when I get back in town soon.
kk
Haven't seen you at the gas shop since it re-opened. PM me...
Most of the aftermarket 1.6 rollers are to wide for the stock center-bolt
head-covers -- the oil breather won't fit in between them.
I wound up going with some Crane's that are specifically for these GM heads.
And they were, as you might guess, price-ier than e-bay bargains.
Also the push-rod length is a bit different (shorter if I recall) to keep the
roller properly centered over the valve. Off-center will cause excessive
side-wear on the valve guides. At least thats the theory.
I'm pretty close to getting mine running -- when I get back in town soon.
kk
06-07-2011, 09:08 PM
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Car: 82 Z28
Engine: 350
Transmission: Turbo 200C
Axle/Gears: 3.43
Re: 1.6 Roller Rocker ????
i will be using comp cams 12-364-4 cam with 1.6 self aligning magnum roller rockers and magnum lifters and push rods. there will be clearance issues so i will need to machine the heads. if your using the stock cam then u should be fine if not you may need to mod your heads.
06-07-2011, 09:41 PM
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: 1.6 Roller Rocker ????
Dude, where you at?
Haven't seen you at the gas shop since it re-opened. PM me...
Most of the aftermarket 1.6 rollers are to wide for the stock center-bolt
head-covers -- the oil breather won't fit in between them.
I wound up going with some Crane's that are specifically for these GM heads.
And they were, as you might guess, price-ier than e-bay bargains.
Also the push-rod length is a bit different (shorter if I recall) to keep the
roller properly centered over the valve. Off-center will cause excessive
side-wear on the valve guides. At least thats the theory.
I'm pretty close to getting mine running -- when I get back in town soon.
kk
Haven't seen you at the gas shop since it re-opened. PM me...
Most of the aftermarket 1.6 rollers are to wide for the stock center-bolt
head-covers -- the oil breather won't fit in between them.
I wound up going with some Crane's that are specifically for these GM heads.
And they were, as you might guess, price-ier than e-bay bargains.
Also the push-rod length is a bit different (shorter if I recall) to keep the
roller properly centered over the valve. Off-center will cause excessive
side-wear on the valve guides. At least thats the theory.
I'm pretty close to getting mine running -- when I get back in town soon.
kk
Have Comps version, the clearance problem is in the hole in the head where the push rod goes thru...Am at a different Gas Shop, same Company..Hurricane Ike took my job out at the old place...
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