Plus Testing and Tuning stuff!
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I've ran the car on the street some and compared my new 4.0L stroker engine with the old 3.8L engine. I'm using FAST XFI to log my MPH so I can see how much the car gains in speed every second. The old 3.8L engine would gain 9mph per second at 27-29 psi of boost at speeds between 75-105 mph. This was in January and February 2007 when the temperatures were cold. The intercooler outlet temps started at 60* and ended at 74*. On another run at 31-32 psi of boost the car gained 10mph per second at those same speeds. The new 4.0L engine also gains 9 mph per second between 75-105 mph BUT this was with the boost set at 22.5 psi. This was also done with intercooler outlet temps starting from 81* to 85* at the end of the run. It took the car 4 seconds to go from 75 to 109 mph. So my testing has showed me that the stroker engine is putting out more horsepower at a lower boost setting. I'm eager to to see what the car does at 25 to 30 psi of boost! NOTE: The beginning of the log is where the car started to spin the tires at 50mph and I had to slack off the throttle and start again at 70mph. Right click and "Save Target As" ---> Here is the data log of the 4.0L engine as described above.
Left front: 910 - Right Front: 924
Left front: 984 - Right Front: 929
NOTE: ALL items above this was done with my new 4.0L engine.
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NOTE: ALL items below this was done with my old 3.8L engine.
This was a data log from my FAST XFI showing what my 200 Amp alternator was doing without a volt booster. It shows the voltage was going lower than I expected. I bought a TPS activated style volt booster which applies more voltage under WOT to cure my low voltage problem. (Look at those low air temps under 27psi of boost!)
NOTE: The animation below REQUIRES LOTS OF COMPUTER CPU POWER FOR PROPER VIEWING! Right Click and "Save As" for better computer performance. Click here to download the entire animated version of the screenshot below!
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60’ 1/8th MPH ¼ MPH
2.05 8.026 93.36 12.177 118.49 *1.97 7.728 96.40 11.867 109.82 *I slacked off on the last run listed above.
Time slips for above (March 19th 2006):
Below is a data log of the 118mph quarter mile run listed above. (March 19, 2006)
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The time slips listed below are from many years ago.
The engine combination was basically stock. It consisted of ported stock iron heads, ported stock intake and two and a half stock intercoolers plumbed together.
The boost was very high at 28-30psi.
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All times below are with a iron headed 3.8L which consisted of ported factory iron heads with 1.77 intake & 1.50 exhaust. It also had a ported factory intake and 2½ stock intercoolers plumbed together.
60’ 1/8th MPH ¼ MPH
1.453 6.536 107.392 <-----Best ever 8th mile (read above) 1.479 6.617 106.253 1.536 6.673 104.942 1.583 6.680 107.078 1.548 6.735 105.376 1.554 6.776 103.455 1.617 6.777 105.512 1.530 6.783 101.936 1.534 6.797 101.898 1.515 6.806 102.611 1.532 6.813 101.369 1.562 6.847 101.786 1.671 6.853 106.071 1.574 6.867 99.747 1.685 6.875 106.121 1.652 6.877 104.321 1.579 6.883 100.636 10.848 123.611 1.609 6.929 100.497 1.595 6.938 98.201 1.587 6.947 98.124 1.610 6.947 99.095 1.588 6.951 99.522 1.588 6.951 99.522 1.620 6.959 101.256 11.171 96.761 1.557 6.967 98.720 --------- 6.974 97.549 1.603 6.974 99.916 1.598 6.989 98.995 1.648 6.999 99.977 1.662 7.049 96.586 1.610 7.051 98.292 1.644 7.052 98.066 11.606 91.871 1.665 7.054 99.447 1.630 7.054 98.674 11.083 120.940 1.739 7.056 102.914 1.665 7.061 99.048 No60' 7.064 97.937 1.649 7.067 97.608 1.754 7.085 102.627 1.697 7.100 97.900 1.707 7.147 99.114 11.606 93.014 1.650 7.160 94.054 11.886 83.886 1.756 7.174 98.401 1.726 7.182 99.339 1.744 7.233 90.446 1.688 7.244 95.970 12.235 76.002 1.743 7.257 98.851 1.820 7.271 98.586 1.760 7.304 95.405 1.799 7.334 96.797 1.819 7.347 91.835 1.770 7.359 98.034 12.003 84.757 1.842 7.367 97.506 1.841 7.397 91.554 1.918 7.536 00.000 1.717 7.688 90.088
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Picture is VERY large...suitable for printing.
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