If I want to convert a 2001 LS1 F-body swap to DBW what would I need to buy for HPT vehicle credits? Do I just buy credits to cover the 2001. Jul 17, 2015 There are several differences in setting up a drive by wire throttle body for an LS engine compared to a drive by cable throttle body. 14.00 LS Swap DBW wire harness. Converting An.
TH35O, 700R4,TH400, or Powerglide Transmisions – BOLT UP
Firstoff, there are NO issues with physically bolting any of the GENIII engines tothese transmissions. One lessbell-housing bolt is used as the newer GENIII blocks are missing the “1o’clock” hole. The issues are solelywith the torque converter bolt pattern, and snout depth. Depending on what vehicle your engine camefrom, you may or may not need an adapter or flexplate modification.
5.3L & 6.0L LQ9 ENGINES: Most, if not all 5.3’s & 6.0 LQ9’s will need a spacer alonger bolts to be added behind the flexplate as they came with a “dished”flexplate for the 4L60e / 4L65e transmissions. All GENIII flexplates use the old TH400 converter larger bolt patterndiameter. So, if you are going to use aTH350 or 700R4 with the standard torque converter you will need to elongate theflexplate converter holes inward, making a smaller diameter pattern. Or, you can run a TH400 converter on yourTH350 or 700R4 and it will bolt right up. Elongating the holes is usually the most cost effective.
6.0L LQ4 ENGINES: Most, if not all 6.0 LQ4’scame in 2500 series cars and trucks, which had the 4L80E transmission. A spacer & longer bolts are NOT needed,but the torque convert bolt pattern is still an issue as with the 5.3L whenusing the smaller TH350 & 700R4 Converters. If you are using a TH400 Converter, then it will bolt right upand NO adapter or modification is necessary.
700R4 Specific: Firstoff, it is not feasible to use a 700R4 with a DBW engine as there is nothrottle body mechanism to hook the TV (throttle valve) Cable to. There are some Internet threads abouthooking it directly to the DBW gas pedal, but I don’t recommend it. For a DBC engine the 700R4 is a littleunusual because it has this TV (throttle valve) cable that needs to be hookedto the throttle body with VERY specific geometry to work properly. The TV cable is NOT a “kick down”cable. It controls transmission valvebody pressure relative to throttle position (load). A bracket that supports the end of the TV cable will need to befabricated and attached to the intake manifold near the existing gas-pedalcable bracket. A universal TV cablefrom Summit Racing: ATI-702050works well. Follow the diagram belowfor correct throttle body modification. A cable mounting point needs to be attached or welded to the bottom sideof the throttle body 1.10” from the throttle body pivot point. At full throttle the TV cable should becompletely pulled tight. If you are uncomfortable with this procedure have aqualified transmission shop adjust it. If not properly adjusted serious transmission damage WILL occur, andquickly.