roller rocker question!!!!
Thread Starter
Heel & Toe
Joined: Apr 2002
Posts: 20
Likes: 0
From: KH NC
roller rocker question!!!!
I have a stock 95 LT1. I have thought about adding roller rockers with out changing the original heads and cam. I would also like to keep the same valve covers. Will I get any performance benifits from this change, or is it not worth while without a head and cam change? If roller rockers will work what kind can you recomend.
I have also toyed with the idea of having the original heads ported and polished, or is there a better and more inexpensive after market choice?
Thanks for your help in advance.
:cheers:
I have also toyed with the idea of having the original heads ported and polished, or is there a better and more inexpensive after market choice?
Thanks for your help in advance.
:cheers:
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Re: roller rocker question!!!! (DUCKHOOK)
We installed a set of Crane Gold 1.6 self-aligning on a friend of mine's 95 Trans Am... No other mods were performed (other than checking piston to valve clearance and retainer to guide clearance). He picked up about 18 rwhp with just this swap but it was all in the upper realm of the rpm band. I didn't see any gains down low and honestly it doesn't feel all that different to me up high either. But, its his car and he swears he feels the difference!!
-Jeb Burnett
-Jeb Burnett
Team Owner
Joined: Sep 2001
Posts: 62,119
Likes: 1,725
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: roller rocker question!!!! (jburnett)
Id think about the hotcam kit myself, but you dont have to change the cam. But otherwise i would get the Cranes 1.6 RR. Most RR will give at least 15hp. Your heads are pretty good, and ported theyll flow alot of air. The only better choice may be AFR's but theyre expensive.
Thread Starter
Heel & Toe
Joined: Apr 2002
Posts: 20
Likes: 0
From: KH NC
Re: roller rocker question!!!! (vader86)
Hey, thanks for the input seems like a good way to increase HP. I've just started to consider modifications and need good feed back.
:seeya DH :chevy :cheers:
:seeya DH :chevy :cheers:
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
Re: roller rocker question!!!! (DUCKHOOK)
I've never had my car on a dyno, but with the motor stock it ran a best of 12.48 @ 108 mph..
All I did was install GM 1.6 RR , & it ran 12.28 @ 110 mph I picked up 2 full tenths.. I also have a weather station, & the weather was almost EXACTLY the same for both runs,
I can't feel any difference at low RPM, but it does pull harder over 4500.. I say its well worth doing..
All I did was install GM 1.6 RR , & it ran 12.28 @ 110 mph I picked up 2 full tenths.. I also have a weather station, & the weather was almost EXACTLY the same for both runs,
I can't feel any difference at low RPM, but it does pull harder over 4500.. I say its well worth doing..
Drifting
Joined: Nov 1999
Posts: 1,324
Likes: 18
From: St. Peters MO
Re: roller rocker question!!!! (Red96Coupe)
Just adding to the question here,
So are Crane Gold self-aligning 1.6's the ones to go with?
Also, What about the valve springs? Do you need to replace at the same time for clearance reasons (binding)?
Thanks, (sorry to butt in on your post!)
So are Crane Gold self-aligning 1.6's the ones to go with?
Also, What about the valve springs? Do you need to replace at the same time for clearance reasons (binding)?
Thanks, (sorry to butt in on your post!)
Melting Slicks
Joined: Apr 2002
Posts: 2,299
Likes: 1
From: louisville ky
Cruise-In VII Veteran
Re: roller rocker question!!!! (DUCKHOOK)
I just put 1.6 roller rockers on my 93, will run some 1/8 mile shot by the weekend & will let u know the results! Seam to pull hards but we will see!!
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Race Director
Joined: Oct 1999
Posts: 13,298
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From: Somers NY
Re: roller rocker question!!!! (DUCKHOOK)
From what I hear the Crane Gold & the OEM GM 1.6 are the same, I'd go with the best price..
YES you do have to change the valve springs ( I was told to prevent coil bind) So all I did was replace the RR & springs... I had to grind off the drip tabs on the valve covers, but other than that it was no prob.
Try calling Dal.. he usually has the best GM prices..
dal slabaugh
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YES you do have to change the valve springs ( I was told to prevent coil bind) So all I did was replace the RR & springs... I had to grind off the drip tabs on the valve covers, but other than that it was no prob.
Try calling Dal.. he usually has the best GM prices..
dal slabaugh
E-mail Address(es):
lockitup@bright.net
Personal Information:
Phone: Chevy Parts
Business Information:
Phone: 800 362-9494
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: roller rocker question!!!! (DUCKHOOK)
Get a set of 1.7 rollers ( yes...you can buy them for the SBC ) and put in some stiffer springs. Should give between 20-30 HP.
This is from Charles Richard at Camcraft:
http://www.camcraftcams.com
[Modified by BBA, 12:27 PM 4/23/2002]
This is from Charles Richard at Camcraft:
We have roller rockers for SBC in 1.5, 1.55, 1.6, 1.65, & 1.7 ratios. They are all 7/16 stud but we can get any of them in 3/8. Cost for most is from $195.00 to $225.00 depending on ratio. Mixed ratio sets are available at no extra charge.
[Modified by BBA, 12:27 PM 4/23/2002]
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Re: roller rocker question!!!! (BBA)
1.7's will almost certainly have a coil bind problem... We had no coil bind or clearance issues in any of the 1.6's we've installed but we always check. At the same time you're checking for coil bind it is a good idea to pull one of the springs to installed height and check what the rate is... Too light and you'll float the valves with the increased lift given by the new ratio rockers. The Crane Gold Series self-aligning rockers and the GMPP LT4 "HotCam" rockers are the exact same. The only exception are those factory installed on LT4 cars which aren't adjustable. You definitely want to use the self-aligning rockers in this instance, otherwise you'll have to install guideplates (real ones, not the ones GM uses) and hardened pushrods.
-Jeb Burnett
-Jeb Burnett
Safety Car
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Re: roller rocker question!!!! (jburnett)
Did you not read the whole post?
If anyone is recommending new rockers without replacing the stock springs...your not talking about doing it right.
With the 1.7 rockers your looking at moving the stock cam lift to about .504, which is quite controllable for most aftermarket springs.
[Modified by BBA, 5:19 PM 4/23/2002]
and put in some stiffer springs
With the 1.7 rockers your looking at moving the stock cam lift to about .504, which is quite controllable for most aftermarket springs.
[Modified by BBA, 5:19 PM 4/23/2002]
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: roller rocker question!!!! (jburnett)
...We had no coil bind or clearance issues in any of the 1.6's we've installed but we always check.
Eric
Melting Slicks
Joined: Apr 2002
Posts: 2,299
Likes: 1
From: louisville ky
Cruise-In VII Veteran
Re: roller rocker question!!!! (DragMan)
tested last night with new 1.6 rocker, went 8.89 @ 80.92mph. Well gonna have to buy Drag Radials it will not hook now!! Ran 8.91 @ 81.06 before
