Another disappointed result, TR 224
It doesnt sound noisy, and i remember lining the dots up, and turning the motor over and making sure they were lined up (i know theres no way it'd change but i wanted to make sure) so those are, my plugs arent gapped i dont think i did them like 30k ago, could that do it? I double checked my rockers and they are torqued to spec, and i have to buy a hose to attach to this gauge to do the compression check to see where that is
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From: Lakeland, FL
Originally Posted by 98NBM_TransAm
It doesnt sound noisy, and i remember lining the dots up, and turning the motor over and making sure they were lined up (i know theres no way it'd change but i wanted to make sure) so those are, my plugs arent gapped i dont think i did them like 30k ago, could that do it? I double checked my rockers and they are torqued to spec, and i have to buy a hose to attach to this gauge to do the compression check to see where that is
even if a rocker is tq'd to spec the preload could be off and thats what will kill you, your goal is if I remember right to hit 3/4 to 1 turn after 0 lash for the proper preload, somebody correct me if I am wrong.
Originally Posted by Mike K.
even if a rocker is tq'd to spec the preload could be off and thats what will kill you, your goal is if I remember right to hit 3/4 to 1 turn after 0 lash for the proper preload, somebody correct me if I am wrong.
For LS1s all you do is torque to spec and go. LT1's are a different story. For every cam install Ive been a part of(4) we've just torqued it to spec and done. Never any problems. Line up dot to dot,torque and done. Is this going through a stock converter or bigger? Heres what I'd do if I was you. Take it apart and make sure again everything is lined up dot to dot then get an LS6 Intake,Pulley, redyno and see what happens.
Last edited by BrianC98Z28; Nov 16, 2005 at 01:08 AM.
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From: Gateway International Raceway
Originally Posted by BrianC98Z28
For LS1s all you do is torque to spec and go. LT1's are a different story. For every cam install Ive been a part of(4) we've just torqued it to spec and done. Never any problems. Line up dot to dot,torque and done. Is this going through a stock converter or bigger? Heres what I'd do if I was you. Take it apart and make sure again everything is lined up dot to dot then get an LS6 Intake,Pulley, redyno and see what happens.
You are correct sir...you torque (22ft/lbs I believe) and go. They are self adjusting rockers with no backlash to adjust.
I too have the 224 cam with heads and put down 390, and that was fine with me. I am going to do the free mods, exhaust and see if I can't reach the magic 400.
Jon
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From: Rochester, New York
Originally Posted by 98NBM_TransAm
You just mean that your cam and crank dots werent lined up?
Heres the graph.
Heres the graph.
Originally Posted by KNOURROL
Yes, they were not lined up. Looking at your graph, aren't your hp and tq curves crossing a little early? Or am I reading it wrong? It looks like they cross somewhere around 4800 rpms. (Or do I need new glasses?)
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Verdad Gallardo Could i not pull the valve cover and make sure #1 is TDC for compression stroke and see if both valves are up to see if the timing is off on the cam or do i need to pull that front cover off?
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Originally Posted by KNOURROL
Yes, they were not lined up. Looking at your graph, aren't your hp and tq curves crossing a little early? Or am I reading it wrong? It looks like they cross somewhere around 4800 rpms. (Or do I need new glasses?)
Originally Posted by Mazzenger
Did you jabber at those cats at extreme to see what
their thoughts were about it?
Maybe you baseline dyno was with a locked converter and this one was unlocked??
their thoughts were about it?
Maybe you baseline dyno was with a locked converter and this one was unlocked??
I finished the compression test up just now and here are the numbers: 1=190psi, 2=195psi, 3=190psi, 4=182psi, 5=190psi, 6=200psi, 7=185psi, 8=190psi. They seem good to me, the dots on the crank and cam are lined up aswell, so i dunno, any more thoughts?
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From: Lakeland, FL
Originally Posted by BrianC98Z28
For LS1s all you do is torque to spec and go. LT1's are a different story. For every cam install Ive been a part of(4) we've just torqued it to spec and done. Never any problems. Line up dot to dot,torque and done. Is this going through a stock converter or bigger? Heres what I'd do if I was you. Take it apart and make sure again everything is lined up dot to dot then get an LS6 Intake,Pulley, redyno and see what happens.
Yes but he has different pushrods and cam right so the geometry is not stock anymore.? Can't hurt to check cause something is not right.
Originally Posted by Mike K.
Yes but he has different pushrods and cam right so the geometry is not stock anymore.? Can't hurt to check cause something is not right.
Stock length pushrods and small cam, and it doesnt matter like I said on LS1's you just torque and your done but on LT1s you have to check all that stuff, Im telling you thats the way it is. Also Ive never heard the 98 heads flow less than others, hell my buddy ran 10.92 with cam/nitrous with stock 98 heads. I ran 12.0 boltons with stock 98 heads so I doubt that. Get a pulley & Ls6 intake and redyno if you want.
I'm not real smart on tuning, especially a N/A car. I thought N/A was supposed to be closer to 14:1 AFR? 13:1 seems really rich and giving up some power. Isn't stock something like 14.7:1? Maybe I'm way off 