I went over to SVTP first I found this in a sticky, I cut the intresting part from the bottom of the write up.......
16) How much power can the stock motor handle?
Rule of thumb is 450 RWHP. The stock injectors and fuel pumps will not safely support any more. With a really good tune the internals will hold out above and beyond that but is usually considered not if but when they will fail. Most, including me run upwards of 450-470 with no real issues on a stock engine. This is with a good dynotune and safe timing and a/f. A street tune will typically have 15-16* of timing while a race tune will have 18-19* and higher if tuned with race gas.
Boost should be kept under 16# unless provisions are made in tuning to accomodate more. 12-14#'s is most common for daily driving and is plenty. Keep in mind when the temps go down the boost will go up due to the more dense, colder and dryer air so change pulleys as needed to compensate for it or you will get a nasty suprise.
The stock short block has the following:
Cast iron block good for as much power as anyone has made to date.
Forged steel 8 bolt crank good for 1000 hp-stock.
"Forged" powdered metal rods good for throwing away first chance you get. They are the weakest link in the chain are always the part that fails first, many examples to date.
Supposed forged pistons, don't really know what they can take because when you change the rods pistons go with it logically. No one that I know of has tested the limits of stock pistons.
Can I put a Kenne Bell or Whipple on an otherwise stock engine?
Yes you can and it's a great investment. The higher efficiency and lower discharge air temperature charictaristics of a twin screw make them a great choice when adding power. They move more air at lower boost levels than the Eaton and aren't as prone to cause detonation due to the lower air temps they discharge. You can run a 2.3 KB or Whipple up to 15-16 PSI on a bone stock motor without danger of breakage.
In order to do so you MUST do the following:
1) Find a reputable tuner who can dyno tune you.
2) Spark plugs with a colder range must be used with the increased boost as well, there are many choices and info can be found by searching.
3) It is HIGHLY recommended to get a Mafia, SCT 2400, 2800 or some other type of MAF upgrade. When elevated boost levels are involved the stock Mass Air Meter is the first component that will reach it's limit, they are cheap insurance. You will require a tuning adjustment when using a larger MAF so keep this in mind. Even when running low boost with the larger blowers this prevents pegging the stock MAF, leaning out the air fuel mix and causing severe damage to the internals.
4) If you plan to go above 12-13 PSI you will need to upgrade the fuel system along with the MAF. The stock fuel system (pumps and injectors) can only support up to @ 500 RWHP. You have several options here but here are the most common:
Replace the stock 130 lph pumps with 255 lph Walbro pump which will support more power than we can ever hope to make.
Replace the stock 42 lb/hr injectors with Siemens Deka 60 lb/hr ones. (You can use 50 or 55 as well but the 60's are most used and said to be easier to tune with.) They will also support as much power as you can stand.
The key to the entire package is good tuning first and foremost. It only takes a few seconds to do irrevokable damage so make sure YOU KNOW YOUR TUNE IS GOOD. Don't take anyones word for it, make them show you-you paid for it. If your tuner doesn't instill 100% confidence in you then find someone else, there are plenty out there just do your homework and ask around.
Good luck and happy modding!!
That's about it for now. More can/will be added later as things are thought of. I'm sure I missed some things so don't ream me too bad if I left something out, it was omitted by error. Thanks again to Sid and Larry for the opportunity. Happy reading.
so according to this rule of thumb is 450rwhp but its says people run 470 with no problems. Then the fuel system is only good to 450 but in other things Ive read there was WAY over this with the stock fuel system :dunno:.
If I went by only this I think I would run the KB and limit boost so that rwhp did NOT go over about 460..........ill keep looking and go to the Lightning owners club now.