LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cam only 355 dyno numbers

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Old 03-02-2011, 12:23 PM
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With stock ported heads and a smaller cam than yours mine puts down around 400rwhp na.
Old 03-02-2011, 12:58 PM
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My old '93 Trans Am 355 with LE2.2 cam did 347rwhp/340tq through a very loose 4K stall and went 12.2@111mph with lots of problems. Pretty sure most LT1's will dyno around here with either stock cubes or 355ci, the stall and rear end will of course eat some but expect similar results.
Old 03-02-2011, 03:08 PM
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Originally Posted by SprayedLT1
I didn't even notice that the torque was affected by the spike lol. Is the detonation on the motor or spray pull, or both? I logged the pulls, and didn't see any knock..


Just curious, what makes you think it's detonating on the nitrous pulls? Liek I said I'm not getting any knock, but I'm also on 93 octane pump gas. Maybe I should use 100?
The squiggly erratic curve on the dyno graph is caused by too much timing
Old 03-02-2011, 04:47 PM
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Originally Posted by gregrob
The squiggly erratic curve on the dyno graph is caused by too much timing
or more likely the opti...
Old 03-02-2011, 04:58 PM
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Originally Posted by Racin96ss
or more likely the opti...
That could be a possibility. The opti I'm using I got in a bin full of used parts with a long block I bought, tore down and parted out. I don't know the history of it, but it probably wouldn't hurt to put at least a cap and rotor in it I guess.
Old 03-02-2011, 10:46 PM
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From those graphs It looks like you might need a tune up. a slight mis will make a graph look like that also. Plugs and wires and go from there. What plugs are you running?
Old 03-03-2011, 07:51 AM
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The wires are a few years old, MSD 8.8 over the valve covers. They're probably overdue to be replaced, actually. The plugs were fresh at the end of last year, but do have some track time on them. I hear spray is hard on plugs. They are TR6 gapped at .035



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