How do you like the LT4 production cam compared to the 元0/31 cam? Looks like it would work great for me. I'd like to see a 5.3 during the same testing procedure. I'm happy to finally see an 元1 grunted down to such a low rpm. This pic shows the bad crimp bend in the bank 1 pipeĭo your headpipes curve over to the passenger side like the pic? I have seen some van pipes that look like they head straight back from the exhaust manifold. Look at the tiny 1 7/8" pipe that gets crimped WAY down in those bends.bends HD truck pipes on left, stock 1/2 ton truck pipes on right. Those headpipes and cam must really wake the 元1 up. On a Dynojet it would read around 310 RWHP/330 RWTQ. The IATs were very elevated on run #2 and it was causing the ECM to retard the timing about 4-5*. Run #2 was made heat soaked, immediately after Run#1, E-fans roaring on high fan speed trying to keep the engine from going above 180*F. On the street with the 元5 S10 Converter it flashes to 2,700ish and puts me in an area the engine is making over 270 RWTQ. 281 RWHP 5,540 and 295 RWTQ 4,440 with 240 RWTQ from 1,500 rpm the LT4 cam advanced 4* is anything but gutless on the bottem. I think its making decent power for just a little 元1 350. Also ditched the mechanical fan, added a pair of E-fans and an underdrive pulley I found on Ebay. The intake manifold is stock, has the GM MFI injector upgrade, a reworked stock throttle body and an 0411 PCM swap with HP Tuners. Has stock manifolds (tired of cheap, leaking shorty headers) on it again, stock HD truck sized exhaust, highflow cats and magnaflow muffler. Engine is the stock long block save for the LT4 cam, 1.6:1 roller rockers, and LT4 valve springs, retainers, etc. This is 3rd gear with the torque converter locked, commanded 3rd/Lockup at 30 MPH and 1,500 rpm. This Mustang Dyno has been verified to be 10% lower than a Dynojet. I never even had a wideband on it, until the dyno this afternoon and my target/commanded air/fuel ratios were practically identical to the wideband on the Dyno. Felt like sharing this about the 0411 swap.
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