beat to death but gotta ask

[LiLbuddha]

ok well i have a 05 mag r/t
id love to put my car into a high 12.9 or better just to say i got a 12 second wagon haha
anyways plans so far are magnaflow catback, intake, thats about it
ive only had this car for little over two months and just figured out my issues with the air ride so wanna work onto the motor now

what are some suggestions?

[metgo]

The best way to do it would be to add headers, heads and a cam. You'd be in the 12s easy. If you want to do it with out heads and cam you will need a lot of other stuff. Headers, catback, intake, predator, UD pulley and drag radials would get you into the very low 13s or maybe upper 12s with good air and some weight reduction. Gears would help out a lot, lots of people are selling their SRT 3.06 gear rear ends because they are swaping them out for getrags. So you could probably get a setup pretty cheap. Or you could just throw nitrous on there now and be done with it. It all depends on how you want to get there and how much money you want to spend.

[iceman-5076Hemi]

metgo...if one were to go the route of heads, headers and a cam or even juice, wouldn't it be very wise to beef up the bottom end?

If not, at what point should you consider beefing up the bottom end, i.e. crank, rods, main bearings and or even pistons? Is there a HP/Torque benchmark you should not cross before spraying and or adding turbo / superchargers etc.

Thanks to anyone that could help out.

[metgo]

metgo...if one were to go the route of heads, headers and a cam or even juice, wouldn't it be very wise to beef up the bottom end?

If not, at what point should you consider beefing up the bottom end, i.e. crank, rods, main bearings and or even pistons? Is there a HP/Torque benchmark you should not cross before spraying and or adding turbo / superchargers etc.

Thanks to anyone that could help out.

It depends on how far you want to go. If want to really spray the crap out of your car all the time you might want to buy a different bottom end. If you just want to run head/cam and/or a small shot of nitrous you'll probably be fine with stock bottom end. If all you want to do is get in the 12s you can do that with as little as 350 rwhp. There is many 5.7 guys making over 400 rwhp with no issues.

[dudeiwin86]

there are cars running low low low 12's without doing the bottom end, there is no need to.

unless of course youre talking big boost (over 6-7 lbs) or over a 125 shot of spray.

heads and a cam do not require any modification to the bototm end unless you really want to get wild and run high compression pistons.

without doing the bottom end... the max horsepower on motor you can realistically acheive is about 400-420 rwhp
this is a rough number, depending on the dyno. but the fact of the matter is.... you cant really get much higher than that without going into the motor.

people have heads + cam + spray and are seeing in the high 400's and low 500's, and the bottom end is just fine. the catch 22 is they have a rock solid tune and are not cutting ANY corners.
i also know of 1 guy to add a blower to his heads + cam setup at about 5-6 pounds, and made about 520rwhp. stock bottom end.

500rwhp is the mark where you have to start worrying about the transmission, not the bottom end.

the problem with our bottom end is not taht it cant take high horsepower...
its taht it cant take high heat.
big boost or nitrous and the pistons just break.
the rods and crank are damn good from the factory.

heres what you need to get into the 12's on motor without breaking the bank
-----
headers, high flow cats, catback
a cold air intake
25% underdrive pulley
camshaft
springs, rods, install kit for the camshaft
diablosport predator + custom tune
torque converter
drag radials.

this is your basic track pack.

if you want to really kick it up a notch and go for low 12s
you can add
heads,
rear end (differential, axles, and depending which route you go, a limited slip or gear increase or maybe both)


if there is ANYTHING i can help you with please feel free to PM me and i can put you in teh right direction

[MadMagnum77]

im running a zex 100 shot, and im on street tires, i have drag radials on the way and i know for sure i will be in the mid to high 12's when i head back to the track.

you can have a 12 second Mag in around $1400 - $1800

C&L intake and Diablo kit from RPM outlet $550

Zex plug ang play kit RPM outlet $570

Drag Radials $ price varies around $400 and up

Remember, you can spend as much as you want, lol, its all a matter of how fast you wanna go!

[LiLbuddha]

well heres kinda where i was gonna think about going,
cai intake, magnaflow catback, diablo, zex 100shot
does 25% underdrive help alot?

[metgo]

well heres kinda where i was gonna think about going,
cai intake, magnaflow catback, diablo, zex 100shot
does 25% underdrive help alot?

25% UD pulley doesn't help a lot but for the price it's a good hp to $$ ratio.

Dyno Results: 25% Underdrive pulley

[MadMagnum77]

sounds like a good plan, with some practice at the drag strip you will be in the high 12's

with a good set of tires in the back and a solid launch you wont even have to try.

good luck with the mods

Phil

[iceman-5076Hemi]

next question...sub frames? At what point do we want to put in sub frames or is our platform sturdy enough for #'s between 400-500 HP?

sorry to be so ignorant, but I would like to have my baby pampered, but also an occassional flogging would be nice too, without damaging / warping the sheetmetal!

[MadMagnum77]

from what i have read up on, there are guys on here running that kind of power and more and dont have the subframe reinforced, i dont see a reason to do it unless you are doing some serious power or just want a stiffer ride, but what the hell, it couldnt help.

[dudeiwin86]

the only people doing any kind of subframe stuff is Razors Edge.
even then, no 1 is using it because it is "needed" at at the drag strip.

the people running 10's arent usign it that i know of, and part of the reason is because thse cars are so damn heavy, that losing any weight any how is good, and if you can avoid it, you dont want to add any