Quote:
Originally Posted by TiAgX5
BCRedliner and I have discussed this at several Cars & Coffee Dallas meets.
If I recall, he's interested in leaving the 4.6is Dinan "as is", a donor blown trans and/or motor X would be an ideal starting point.
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I have Dinan mods that took me to 369HP. I added meth injection and a 150 shot of nitrous. The Dinan mods included transmission software. I also installed electric cutouts. It's hard to find the Dinan stuff anymore and if I was to start over I wouldn't bother. Whether it be a 3.0, 4.4, 4.6 or 4.8 I would go the meth and nitrous route.
I have considered lots of options beyond where I am. While there may be an opportunity to simplify the electronics and increase HP and TQ going to an LS3, doing so creates another list of issues.
In the case of 4.6 it will likely be the transmission. There is a vendor that will rebuild the transmission to handle more HP and TQ and also offers a high stall convertor. If that transmission handles the increases the next weakest link will become the rest of the driveline.
Since the bottom end of a 4.6 is almost bulletproof, and a 4.6 on the rare side, going to an LS3 only makes sense if it delivers over 700HP. At that level I think I would be chasing weakest links with little out there to solve the problem.
Unless I wouldn't be chasing the weakest links at 700+HP and 600 TQ I would go another route--such as the X5M that has an 8 speed transmission instead of a 5, launch control, etc. and the starting point is already 567 HP and 553 TQ There are suppliers to push that to over 750 HP without causing other problems. With the twin turbos getting more than that wouldn't be that difficult.
That's the route I intend to go. My 4.6 will no longer be my daily driver. I will then upgrade the transmission, increase the diff ratios to at least 4.10, increase the nitrous to 200 shot and have some head work done. I expect I will find the next weakest link.
There were no 4.6 nitrous applications that I could find so it was breaking new ground. It's not now.