80LS1T Posted October 21, 2002 Share Posted October 21, 2002 #1...If I want to put 1.6 ration roller rockers on my 93 LT1 what else to I have to do to the valve train if anything? #2...Ok if I am going to use a T56 manual transmission in my car is there a switch or something that I will need for the pedal? Cause you know how with a manual you need to have the clutch pedal to the floor for the car to start. Or is this eliminated on the computer or some other way??? Thanks a lot guy and gals(I know theres a few of you out there )!!! Guy Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted October 21, 2002 Share Posted October 21, 2002 you MUST use narrow body roller rockers (self alineing) on an LT1 and in most cases stock valve covers willNEED the internal drippers drastically shortend, both crane and comp cams make the NARROW BODY roller rockers, btw in some cases the pushrod slots will need to be lengthened for clearance. http://www.compcams.com/information/Products/RockerArms/HiTechStainless.asp http://www.cranecams.com/master/rockers.htm http://www.cranecams.com/master/images/392d.jpg Quote Link to comment Share on other sites More sharing options...
labrat Posted October 22, 2002 Share Posted October 22, 2002 As far as your other question goes, cars didn't even have that feature till the 80's or so, and I can't stand it anyway. Just put the car in neutral to start it. Saves wear and tear on your crank thrust surface. As long as you wire up the starter to work directly off of the key switch, you will be fine. Bill Quote Link to comment Share on other sites More sharing options...
Mudge Posted October 22, 2002 Share Posted October 22, 2002 The LT1 looks for a pedal depression yes, I dont know if thats a function of the PCM or somewhere else in the wiring. If you use non self aligning rockers, you need guideplates and hardened pushrods. I believe the LT1 got hardened pushrods until 96. You will also need new valve springs since the 1.6 rockers will put them near bind, especially if they are old and you plan to rev it up a bit. LT4 springs will be good for .525 lift (barely), so you should be ok there, and they are reasonably inexpensive. I am not sure if they are the same diameter. I live in CA but use Jason in FLA for my parts, good deals, and he knows his stuff. Ask for Jason Cromer directly if you call. Jason Cromer: 1-877-726-8295 Quote Link to comment Share on other sites More sharing options...
80LS1T Posted October 23, 2002 Author Share Posted October 23, 2002 Ok, thanks for all the info on the rocker arms! But does anybody know for sure about the clutch pedal switch??? Thanks Quote Link to comment Share on other sites More sharing options...
Tim240z Posted October 23, 2002 Share Posted October 23, 2002 I'm using a 94 LT1 and have had no problem with not having a clutch switch. Tim Quote Link to comment Share on other sites More sharing options...
80LS1T Posted October 23, 2002 Author Share Posted October 23, 2002 Hey Tim240Z did you delete it from the computer or does the computer just not need it to start the engine? Thanks! Quote Link to comment Share on other sites More sharing options...
Tim240z Posted October 23, 2002 Share Posted October 23, 2002 Didn't do anything to the Computer. I *think* that that the switch is part of another harness, not the PCM harness. As a matter of fact, the thing fired without disabling the VATS. It didn't want to run more than a couple of seconds, but that was another issue. I disabled the VATS later anyway. Must be the way I have everything wired up I guess. Tim Quote Link to comment Share on other sites More sharing options...
80LS1T Posted October 24, 2002 Author Share Posted October 24, 2002 Hey Tim240Z, I thought I heard that about the LT1's and the VATS. That you could fire up the motor but it would run for more than a few seconds??? Can someone back me up on this or am I crazy? Oh yeah and why would your motor stay running, Tim240Z? By the way I was looking at some roller rockers on Ebay....would these work???............ http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1870606619 http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1870620611&rd=1 Would I be better off with the 1.5 ratio rockers? Thanks again! Quote Link to comment Share on other sites More sharing options...
Tim240z Posted October 24, 2002 Share Posted October 24, 2002 I don't believe that it was the VATS that was causing the dying after start. After I disabled the VATS, it did the same thing. I unplugged the MAF and it was purrrfect. So I can only assume that the MAF is bad since when it defaults to speed density, it runs fine. So all in all, I don't think that the VATS was ever in the equation ( ) There's a head scratcher for you. Tim Quote Link to comment Share on other sites More sharing options...
80LS1T Posted October 27, 2002 Author Share Posted October 27, 2002 So can anybody tell me if those roller rockers will work on my motor??? Thanks! Quote Link to comment Share on other sites More sharing options...
Guest JAMIE T Posted October 27, 2002 Share Posted October 27, 2002 Either set will work. I'd go for the 1.6's for alittle more lift. I've got the Crane Gold race rockers on mine. They are also self aligning. I got the LT4 HOT cam package(but bought all the parts seperately from members on the www.camaroz28.com forum). If you haven't visited that website yet, it's pretty much the best forum web for F-body/LT1 stuff. Many guys like to use the regular style rockers with guide plates and hardened pushrods like Mudge said. But, I used the self aligning type since if Chevy would warrenty them in a GrandSport Vette, then they can't be so bad. Quote Link to comment Share on other sites More sharing options...
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