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09-09-2002, 07:26 PM | #1 |
Scooby Specialist
Member#: 13764
Join Date: Dec 2001
Location: Sugar Land
Vehicle:2004 WRX wagon*gone* "radio flyer" |
how much hp can the stock bottom end handle
my goal is to hit mid 12's and then add nitrous. my mods so far are:
VF30 SBC-Id up pipe down pipe cut out CAI NGK plugs pully kit I dont have far to go...before I had the pullies installed, I ran a 13.1 in Houston summer heat, full interior, half a tank, and a small system in the trunk. trapped at 102.5 so Im hoping that with winter around the corner, ill hit a 12.9 *crossing fingers* next mods on the list: FMIC Injectors Fuel pump fuel rail fly wheel clutch better tires bigger downpipe unichip im hoping that once I get all this done ill be in the mid 12's with no probs...THEN goes the nitrous...and this is why I made this post. Ive talked to some of my buddies...and they stress to me that make sure the bottom end can handle it. now I dont know a whole lot about mixing the N20 with turbos...im aiming to do a fuel mix..i think thats what it is..wet shot....im aiming at doing probably a 50-75 shot..any info would be appreciated
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09-09-2002, 10:19 PM | #2 |
Scooby Specialist
Member#: 10507
Join Date: Sep 2001
Vehicle:'04 Ex STi Owner '97 4Runner |
From everything I've read around here, anything over 400 hp puts you right at the ragged edge. Any detonation could cause a failure. If your're going to make that kind of power, make sure you do it on race gas, and have good tune.
Your tranny will last for a little while. Nice times on your current setup. I'm aiming for something similar by the end of the year. Kevin |
09-09-2002, 10:25 PM | #3 |
Scooby Newbie
Member#: 7675
Join Date: Jun 2001
Location: ABQ, NM
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Torque numbers are another thing to worry about its not just hp numbers. 400ish flbs can do it too, especially in the long run, even without detonation those kinds of numbers are going to be hard to sustain.
-MAX |
09-09-2002, 10:52 PM | #4 |
Scooby Specialist
Member#: 9026
Join Date: Aug 2001
Location: If I knew, I wouldn't be lost!
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When someone actually decides to push several of these motors on a dyno until they let go, this is pure speculation. There is no legitimate basis for anyone to guess that 400hp is the limit, so I would take any comments on this question with the proverbial "grain of salt".
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09-09-2002, 11:04 PM | #5 |
Scooby Specialist
Member#: 8908
Join Date: Aug 2001
Chapter/Region:
SCIC
Location: state of oblivion
Vehicle:2012 Ford Raptor |
Um 400 definatly is not the limit at the crank. At the wheels maybe.
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09-09-2002, 11:10 PM | #6 | |
Scooby Specialist
Member#: 10507
Join Date: Sep 2001
Vehicle:'04 Ex STi Owner '97 4Runner |
Quote:
Maybe not on the dyno though. Your engine might last for a good number of drag runs at that kind of power, but strap on a big (huge) turbo and hit the track, or take high speed runs, and we'll see what happens. Kevin |
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09-10-2002, 12:16 AM | #7 |
Scooby Guru
Member#: 6788
Join Date: May 2001
Chapter/Region:
Tri-State
Location: Stamford, CT 06902
Vehicle:2014 991 Turbo S 2007 997 Turbo |
Your set up would prob be about 350 at the wheels with a 50 shot and would be fine if you had it tuned well
IMHO - a fuel rail mod is very much needed if you want to run big boost on the highway to prevent lean cylenders |
09-10-2002, 01:51 AM | #8 |
Scooby Guru
Member#: 13831
Join Date: Jan 2002
Location: 99 problems but a bitch aint 1
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I'd have to look back at jorge's meltdown, but most of the failures ive seen and read about have been pistons in the 350whp range. With forged pistons who knows...might take many hard miles before the bottom end pukes. You cant be sure...just because the weakest link is breaking first, it doesnt tell you when/whats going to break next.
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