This might be kind of long, but I want to lay it all out so if someone has an informed opinion I would love to hear it! I recently paid off my immaculate '95 Gt vert and shortly after it developed a detonation problem. After 3 shops scanning it with no codes and doing a dyno run on a scanner (I think it was a Genisis 5000?) alls we could determine is that after up to temp it would start to detonate at just 23 degrees advance......
So, at this point I thought I would just tear it down, have my way with her, and would find the problem. After getting the engine down to the short block I must proclaim it is the most prestine 130,000 mile motor I have ever seen. No ridges at the top of the cyl bores, and the cross hatch on the cylinder walls is still there. However, no mechanical sign of the detonation problem. This led me to think I will just put it back together with the following items. Now keep in mind, this car was dead stock when I started this. When you look at this list, if there is an * next to it, it means I already purchased it. But here was my intention:
TFS "Street Burner" heads/Cam/Intake kit
MAF tuned for 24lb injectors and Cold air
70 or 75mm TB
50 GPH in-tank pump
Cold air intake kit (anyone tried the $39.00 ones on ebay?)
*Pypes 1-5/8" primary shorty header
*full 2-1/2" off-road X-pipe system into Flowmaster 40 series
Melling high volume oil pump
Trick flow 150 shot nitrous
SFI approved damper (found old damper starting to come apart on tear down)
3:73 rear gears
Ok, so heres the dilema..... Trick Flow claims something like 350hp/360ftlb on a 9.5:1 compression motor with the above mentioned kit (I have no idea what my stock comp ratio is, nor if TFS #'s are crank or RWHP?) If so, with the above package on spray, I am thinking I will grenade the stock 5-speed.....
If I do go with the above, I will also plan some brake and suspension mods later on......
But I guess the ultimate question is, after just making my final payment on this car do I go ahead with this plan, or just get a 96 or newer 4.6L and build it up. I have heard the 4.6 is bullet proof, super easy to get huge hp out of, but also heard the early 4.6 generations are not worth putting any more money into then a late 5.0 and that you need something later then 2002 or so to reap the benifits.......
AAARGGGGHHHH.... so confused!*!*!**!**!
Anyone want to chime in on this?