Anyone on here running 1.6 rockers? I have some in the garage, thinking whether to put them on soon, or wait for the car's downtime in a few months.
Next weekend they go on.
Robby does from the W-body page. He had a problem breaking the guides. I believe he said all that was neccesary was to grind out the U, his were rubbing. HTH.
QuoteNext weekend they go on.
What brand do you have?
I'll try to talk to robby about them. By grinding the U part, you mean the part down near the lifters?
The guide where the pushrod goes through. That's what was hitting.
Comp Cams 1:6 magnum w/ hardened pushrods.
The guide plate that holds (guides) the pushrod. Plan on using round file to make groove deeper.
Am going to make a few g-tech runs before and after. With the SH&%%y fuel here in Italy my power is not even what it was at altitude in CO.
Last week showed 149 to the wheels with stock chip :shock: :(
MODs
P&P heads
I/C mod
TB bypass
K&N on turbo
RTL42 plugs gapped @ 40
MSD coils
Taylor wires
24Lbs injectors
UD crank pully
only "unknown" I can think of is if the new rockers will hit my valve covers?
Cool. I took a ride in a TGP with 1.6 rockers, it sold me on them. Felt like a nice gain, a good SOTP difference.
That sucks about the gas over there, maybe try some octane boost or something? Don't know if that would help any.
http://www.ny-jbodies.org/forum/library/How2/2.2rockerarm.htm
Who was that with them installed already? (in case I have issues)
I guess 10 HP gain tpos - (the g-tech never lies, I allways use 3200 lbs)
Thanks for the write up 90TGP
From what I figured, it would be like a 5hp gain, however you will GAIN gas mileage assuming you drive the car the same, and you also gain torque. It might help the turbo spool sooner too. It really makes a big difference overall in how the car feels, but the gain isn't going to be large amounts. I would guess LESS than the UD pulley, at most it would be the same. 1.9:1 rockers only gain 20hp on an L67 from the stock 1.6's. So 1/3 of that gain (by only raising the ratio 1/3 as much) would be ~7hp. But it is a gain and will only make the car faster.
I wouldn't base what another TGP feels like on anything. My TSTE and TGP coupe feel COMPLETELY different. They have the same mods done to them and the STE makes a lot more power, but the coupe feels a lot faster. So, just because the one with rockers FELT faster doesn't mean much.
Shawn
Well, I have the GM ones. Out of a 3100 engine, they are 1.6 ratio. The TGP I rode in had those. He said he just did a straight rocker swap, didn't grind anything. About 4 months later, no problems, or noises. I'm just nervous to do that cause I've read that the pushrods could rub, or the heads and those rockers don't line up.
So I think I'm gonna wait to take my car off the road, then do the rockers. (Struts too, they are needed badly.) This way I can see if there are any problems encountered, if so, I have time to make it right. If it works good, that's another cheap mod, maybe another tenth?
I got that from v6z24.com [the cavalier forum]. I know a LOT of guys over there are running aftermarket rockers. Probably the best place to get info.
Quote from: no1kickerWell, I have the GM ones. Out of a 3100 engine, they are 1.6 ratio. The TGP I rode in had those. He said he just did a straight rocker swap, didn't grind anything. About 4 months later, no problems, or noises. I'm just nervous to do that cause I've read that the pushrods could rub, or the heads and those rockers don't line up.
Don't those rocker arms have bolts running through the middle of them? I have a set of 3100 1.6 Rollers and they have a bolt and square mounting plate type thing running through them, and I was told they will not work on heads with the studs, even if you cut the bolts out of the middle and put the rockers on the studs. I don't know if this is true or not, but thats what I was told. Do yours have the bolts in them? The guy that you know that put them in, he used stock 3100 ones? If this is the case, I have some 3100 rollers I will install, and it would be significantly easier to do it now with the engine still partly apart then it will be with it put together.
Shawn
Pretty sure they're the 3100 ones he used. Since you're motor is apart, do you see how this would work? I'm going to wait a bit to put them on. I might even ask him for help.
Quote from: no1kickerPretty sure they're the 3100 ones he used. Since you're motor is apart, do you see how this would work? I'm going to wait a bit to put them on. I might even ask him for help.
If they have the bolts running through them then they won't fit on your heads without grinding notches in them...and I'm pretty sure you don't want to be taking a grinder to your heads. If they don't have bolts running through them then they probably would work fine, but i have been told there are clearance issues if you cut the bolts off of them and use the rockers on the studs...although I'm not sure if this is true or not.
Shawn
**Update**
Rockers are in, and I dont have any solid HP gains to report due to some studdering issues (ignition) but I will report that it pulls harder, idles smoother and you can feel the differance in the top end.
Notes from my install
1. What a pain in the A$$, took me about 8 hrs off and on removing everything on the top end to get to the rockers. It seems to be a worth while mod, but not like my L67 3.8 or a SBC - much harder to get to the rocker arms.
2. Dont try to torque to the service manual 35 LB tourque, use the old fashioned way adjusting the arms in accordance with directions from Comp cams web site.
3. Hand filed down the push rod guides, dont think that I needed to when checking clearance, I used the hardened pushrods from Comp Cams also.
4. When removong the TB I completly removed the coolant passage way from the bottom of the TB, freeing up some space since this was deleted on my car anyways.
Will not get to do any G-tech runs to verify gains, will be away from car sever months.
so i got those 3100 rockers that sit on like a stool with a notch sticking out of the bottom, like they fit in a notch on the 3100 head.
If i grind the notch off to be flush so the rocker sits flush on my head and remove my pushrod guides it seems like it could work, using the 3100 pushrods ( cause they are shorter) Has anybody else done that to their car?
when i mock fitted everything it seemed like it could work?
Can anyone help me with this, do they know what i'm talking about?
Ok, since some of you have done this already.
What would you suggest for someone that wants to do this but is on a budget? And anyone have step-by-step instructions on how to do this, what parts are needed, and where to get the parts?
Not really sure what you are talking about. If you are talking about the pushrod guides. I took a round file and lenghtened each opening so there would be no rubbing. I then rotated the crank several times checking clearance.
Bringing this back up. Did you use new bolts for the rockers? And did you use any RTV on the valve cover gaskets?
Used the stock rocker arm bolts, IIRC they are not Torque To Yeild (TTY) bolts so they can be reused.
As a measure of safety I soaked the rockers with "assembly lube" before start up.
Used a "dab" of RTV to hold the rubber seal in the valve cover gasket slot, none on the heads.
HTH - Chief