I came to the conclusion that I want to run nitrous, so why not go big. What do you guys rec for the bottom end? PI 2v. Also what MPH should that run around? Im guessing 118ish? I will be purchasing a focus fuel pump.
Building Motor to handle 200 shot???
- Thread starter slayerripkdc
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BurningRubber
10 Year Member
- Dec 6, 2004
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More than 118mph. Tim2002GT is running 118mph on a 125 shot and he has bolt ons + longtubes and a tune.
Are you planning on a wet or dry setup? For a wet shot that big, you'll still want to upgrade your injectors (and get a recalibrated MAF), pump (SVT Focus may cut it for that big a shot, let someone else chime in for sure).
A dry shot you'll want a pretty serious fuel system to keep up with that. Big injectors and a powerful pump, probably upgrade the fuel rails as well for that kind of flow.
As far as the bottom end, you could re-use your GT crank and likely be fine as long as it's in good shape and properly re-finished. Forged rods and pistons definitely if you're taking it apart.
You won't want to run a 200 wet shot through the composite intake. That's asking for death. I'd strongly consider the Edelbrock intake - it's a killer setup for nitrous.
Are you planning on a wet or dry setup? For a wet shot that big, you'll still want to upgrade your injectors (and get a recalibrated MAF), pump (SVT Focus may cut it for that big a shot, let someone else chime in for sure).
A dry shot you'll want a pretty serious fuel system to keep up with that. Big injectors and a powerful pump, probably upgrade the fuel rails as well for that kind of flow.
As far as the bottom end, you could re-use your GT crank and likely be fine as long as it's in good shape and properly re-finished. Forged rods and pistons definitely if you're taking it apart.
You won't want to run a 200 wet shot through the composite intake. That's asking for death. I'd strongly consider the Edelbrock intake - it's a killer setup for nitrous.
Tim2002GT
Founding Member
For a 200 shot, I would plan on using a direct port nitrous kit to minimize the risk of fuel puddling in the intake. I would not even risk trying a 200 shot with a wet kit and definately not with a dry kit. Also, a progressive controller will help a ton with traction, you can control how much power is added over a small period of time.
A built bottom end is a must. As for fuel system upgrades, a big fuel pump is a must. Maybe a Walbro 255 would be ok. You don't really need to upgrade fuel injectors, you can add your fuel by changing out the fuels jets to dial in the a/f ratio. Typically, you should only add about 50% more hp than what your motor can make NA. IMO, a 200 hp shot(at the tire) is too much for a 281 cid engine. I wouldn't expect the motor to live a very long life.
Supposing your motor makes 250rwhp NA, and your adding 200 hp worth of nitrous to that. You should be trapping well into the 120's with the right gearing and tire combo.
A built bottom end is a must. As for fuel system upgrades, a big fuel pump is a must. Maybe a Walbro 255 would be ok. You don't really need to upgrade fuel injectors, you can add your fuel by changing out the fuels jets to dial in the a/f ratio. Typically, you should only add about 50% more hp than what your motor can make NA. IMO, a 200 hp shot(at the tire) is too much for a 281 cid engine. I wouldn't expect the motor to live a very long life.
Supposing your motor makes 250rwhp NA, and your adding 200 hp worth of nitrous to that. You should be trapping well into the 120's with the right gearing and tire combo.
nickmckinney
Member
- Sep 25, 2009
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Here is a little nitrous inspiration:
And a sound clip:
YouTube - 2004 Mustang GT walk around and exhaust clip
And a sound clip:
YouTube - 2004 Mustang GT walk around and exhaust clip
Stumbaugh
Member
Tim2002GT
Founding Member
Thanks man! Here's the basic rundown...
JLT RAI
75 mm tb
TrickFlow plenum
Flowtech LT headers
Flowtech o/r X pipe
Bassani catback
HarrisSpeedworks nitrous kit (125 shot)
Mail order NA and nitrous tunes from Mustang Performance Parts & Upgrades by Brenspeed
MGW shifter
FRPP 4.10 gears
FRPP 31 spline differential
Moser 31 spline axles
Centerforce dual friction clutch
255/60/15 MT ET street radials with skinny's up front
For suspension mods, I've got Ford "c" springs, stock shocks/struts, Steeda lower control arms, and MM full length sfc's. Plus I remove the front swaybar for better weight transfer at the track.
BurningRubber
10 Year Member
- Dec 6, 2004
- 1,865
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Here is a little nitrous inspiration:
And a sound clip:
YouTube - 2004 Mustang GT walk around and exhaust clip
Hey, I took that picture!!!
Jerry's GT is a mean son of a bitch... it's too bad he doesn't post over here. That's a mod motor car done right.
Tim2002GT
Founding Member
Yes, but next week I will be putting my 3rd one in it too! Haha! If you drive it hard enough, sooner or later its going to break something. I do powershift on and off the bottle.
not sure if this helps, because as of now I am posting about how to get traction in the tech section..but, for what its worth.
i have a stock block stroked and bored to 5.1l, forged crank, rods and je flat tops. My compression is about 10.5-10.6 by the math. I had my pi heads ported and worked over locally. I am runnnig a comp 270ah cam (my biggest mistake), out of breath a little early. the eddie intake and spraying a 200 wet shot on it. For fuel I am running stock rails, larger injectors, and a k/b boost a pump. The car has no fuel problems. I have had it on a mustang dyno and the sheets never show a single fuel problem. If your kit was dry that would be diffrent. The car makes ok power and so far the best it has traped is 119. As stated earlier I am having serious issues out to about 150 feet. I am running 8.2-8.4 second 1/8th and 12.1-12.4 1/4 mile. I hope this helps a little bit. I'm not an expert but this set up is on its third big bottle (60lb) of gas and it runs like a champ.
i have a stock block stroked and bored to 5.1l, forged crank, rods and je flat tops. My compression is about 10.5-10.6 by the math. I had my pi heads ported and worked over locally. I am runnnig a comp 270ah cam (my biggest mistake), out of breath a little early. the eddie intake and spraying a 200 wet shot on it. For fuel I am running stock rails, larger injectors, and a k/b boost a pump. The car has no fuel problems. I have had it on a mustang dyno and the sheets never show a single fuel problem. If your kit was dry that would be diffrent. The car makes ok power and so far the best it has traped is 119. As stated earlier I am having serious issues out to about 150 feet. I am running 8.2-8.4 second 1/8th and 12.1-12.4 1/4 mile. I hope this helps a little bit. I'm not an expert but this set up is on its third big bottle (60lb) of gas and it runs like a champ.
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