Kevin's VQ35 Cam Build
Junior Member
Joined: Apr 2009
Posts: 28
From: Georgia
Barry is still watching lol
looks like i'm going to have two motors
this one [i have 10,000 miles on it since the incident]
and the one Travis is building
after justin pulled one degree of timing
this motor turned into a great street motor
smoking joe drove it the day Justin did it
did you see the 12.22 na maxima
thats where my sights are
I'm beginning to worry if i have to come back next life time to finish this project of mine lol
sorry, but it warms my heart to know everybody's projects go slow
and its not just me
looks like i'm going to have two motors
this one [i have 10,000 miles on it since the incident]
and the one Travis is building
after justin pulled one degree of timing
this motor turned into a great street motor
smoking joe drove it the day Justin did it
did you see the 12.22 na maxima
thats where my sights are
I'm beginning to worry if i have to come back next life time to finish this project of mine lol
sorry, but it warms my heart to know everybody's projects go slow
and its not just me
Junior Member
Joined: Apr 2009
Posts: 28
From: Georgia
since i estimate from drag times and g-tech readings mine makes 300-306 hp
i'm guessing kevins should go 315hp or more at the wheels
once he sorts it out
don't go by the 1st dyno
wait till he gets a feel for it
on the new 3.9l we are shooting for 325-330hp na
good ish Kev ...sorry man totally forgot to text or call you , Ill try to give you a call tommorow on the way back from Moroso , Im dropping a friend of close by commerical and may swing by the job if you work the same hours....
Nevermind.. after looking at your other thread, how it's worded, and speaking to someone close to you guys.. I think I see what's going on here. I'm not going to get started, because I've already paid my dues, and proven myself over the past 10 years. Have fun with your little project.
Travis
Great job Kevin! Aaron explained to me your tq numbers and thats right in line with where your peak hp is.
Travis, its all in good fun between friends. Nobody means any disrespect. You should have seen the ticked off people at Nationals when the little Sentra set the track record after breaking 4 times. No one was our friend that week.
Travis, its all in good fun between friends. Nobody means any disrespect. You should have seen the ticked off people at Nationals when the little Sentra set the track record after breaking 4 times. No one was our friend that week.
Great job Kevin! Aaron explained to me your tq numbers and thats right in line with where your peak hp is.
Travis, its all in good fun between friends. Nobody means any disrespect. You should have seen the ticked off people at Nationals when the little Sentra set the track record after breaking 4 times. No one was our friend that week.
Travis, its all in good fun between friends. Nobody means any disrespect. You should have seen the ticked off people at Nationals when the little Sentra set the track record after breaking 4 times. No one was our friend that week.
I'll be making a few events up your way once Barry's car is finished. Travis
Hey going back to this post, 300WHP give or take is now 326WHP? and around 380 at the flywheel. Anyone else want to chime in on if our 310cc injectors will produce 375-385 (11%-15% drivetrain loss) at the flywheel. 
I'm sure this is going to open up a lota comments haha. All in good fun. My tuner and myself don't see it as possible. Comments begin!
I'm sure this is going to open up a lota comments haha. All in good fun. My tuner and myself don't see it as possible. Comments begin!http://www.race-cars.net/calculators/et_calculator.html
I have used this calculator for years, and it has always been consistent with what my dyno numbers read, within 5-10whp, typically (at this power level).
When I initially posted what I thought the car was making, I based the weight on roughly 2900lbs. @ 2900lbs, with a 110.82mph trap speed, we come out to around 308whp. I'd say that 8whp falls within the "give or take" category. To back that up, 308whp @ 2900lbs, shows an ET of 12.30. Pretty close to my 12.29, real world number. However, the calculator is only as good as the info that you feed it.
In reality, the car weighs closer to 3100lbs, with driver, fuel, roll cage, FULL interor (down the spare tire/jack), ABS, etc.. Barry had the car weighed at one of the tracks up there in Georgia. Now, I doubt that Barry is going to lie about what his vehicle weighs.
So, let's play it conservative, and say that it weighs just 3075lbs (although I'm 50-60lbs heavier than Barry). @ 3075lbs, in order to trap 110.82mph, you would need roughly 326whp. And, to back that up, if you plug in 326whp, with a race weight of 3075lbs, you come out with calculated ET of 12.30 @ 110.74mph. I ran 12.29 @ 110.82mph. I'd say that's pretty accurate, wouldn't you?
People design calculators to estimate WHP, because it's the only thing that's easy to calculate. If you had to try to figure out crank HP, based on MPH, then, you would have a LOT more factors to figure in. But, in the end, you know that with weight and MPH, anyone can figure out what kind of power a car is making at it's drive wheels, within 5-10whp.
It really all boils down to one thing.. Which do you consider more accurate? Real world figures, or dyno figures.. Dyno figures don't win races, so, I know where my money is going.
Is it so hard to believe, that Barry's motor is making that kind of power? I've built some of the sickest, highest HP QR's in existance, and I was doing it years ago, before anyone else. I designed, and built a destroked QR, from the ground, on up, that revs to 9K, and makes 500+whp on pump gas. I've built 1000+ hp streetable Mustangs.. Hell, I built a 600whp, 6 cylinder, turbocharged Trailblazer. I know what I'm doing.. As far as the injectors..
VQ injectors, at 51-52psi, flow around 305-310cc.. I've had a set flow tested. I use 52psi, because a Walbro pump, in the Spec V canister, makes a few more PSI of rail pressure than what a factory pump would make. The Spec V's FPR cannot bypass enough fuel to maintain factory pressure, and it creeps up a few pounds.
So, 6, 310cc injectors (@52psi of pressure), with a brake specific fuel consumption of .45 (pump gas, N/A motor), will support 370 crank HP, at roughly 86-87% duty cycle. This is within reasonable/safe limits.
If you'd like to calculate this for yourself, here's a good page, with lots of info..
http://www.rceng.com/technical.aspx
In reality, if you stay naturally aspirated, you could take the factory injectors about 20-30whp further, but, I limit duty cycle to around 90%, just to give some cushion, in case there's a drop in fuel pressure, or whatnot.
Travis
Last edited by TurboS13Hatch; Feb 25, 2010 at 06:30 AM.
With the SER tranny and gearing, I believe its more around 18-19% DLL. My car weighs 2708 with me (205lbs with racing gear). I am stripping it bare and adding ballast to the floor to get us to the 2800 min weight req. This is also why removing the sound dead material is a waste of time.
Last edited by smokinjoe; Feb 25, 2010 at 07:27 AM.
While I have no way to actually test the driveline loss, I've been told (by Clark @ JWT), that the RWD 6spd cars lose about 20%, and the FWD Maxima/Spec V 6spd will lose about 12-13%. Not sure if those numbers are 100% accurate, but, I trust the source.
What all do you have in the car to get to that weight?
Travis
What all do you have in the car to get to that weight?
Travis
Kevin.. you are the one that just brought it back up.. 
You intentionally try to push my buttons, yet, when I roll out factual data/numbers, and list credentials (you call it bragging), you want to call me out like I'm making things up, or lieing..? I listed a few things that I've done, to back up what I'm saying, and show that I'm not just posting information, that someone else has fed me. That being said, what have YOU built/tuned, Kevin? Do you want to know the difference in skill required, when tuning a 1000hp engine, and a 2500hp engine? Absolutely none.. In some ways, it's probably harder to tune a streetable 1000hp engine, than it is a 2500hp drag only engine.. simply because of driveability, and walking a fine line to make that kind of power without blowing up the motor (pump gas and methanol).
Stop being petty, and just go enjoy your damn car man.. I don't care what your tuner says.. I don't care what anyone says, really. Who here, (or elsewhere) is disagreeing with me, or can provide factual data/numbers to refute what I'm claiming? The figure that I threw out (AROUND 300whp), was based on a much lighter weight. Now, we know for sure, what the car weighs, and honestly, up until you made the claim that you had the highest HP N/A VQ, I had never even gone back to crunch the numbers. One thing is certain.. is takes "X" amount of power at the drive wheels to run "Y" mph, through the traps.
Again, please stop with this stuff, and just enjoy your car, Kevin.. If you think that Barry's car doesn't make the power that I'm showing it to make, then, that's fine. Go, and run your car at the drag strip, and see what kind of MPH you pull. I can tell you.. If you run the car at 300whp, on a 24.5 x 8.5" slick, and you can actually drive, then, the car will run some mid 12.40's @ 109-110mph.
Travis
You intentionally try to push my buttons, yet, when I roll out factual data/numbers, and list credentials (you call it bragging), you want to call me out like I'm making things up, or lieing..? I listed a few things that I've done, to back up what I'm saying, and show that I'm not just posting information, that someone else has fed me. That being said, what have YOU built/tuned, Kevin? Do you want to know the difference in skill required, when tuning a 1000hp engine, and a 2500hp engine? Absolutely none.. In some ways, it's probably harder to tune a streetable 1000hp engine, than it is a 2500hp drag only engine.. simply because of driveability, and walking a fine line to make that kind of power without blowing up the motor (pump gas and methanol).
Stop being petty, and just go enjoy your damn car man.. I don't care what your tuner says.. I don't care what anyone says, really. Who here, (or elsewhere) is disagreeing with me, or can provide factual data/numbers to refute what I'm claiming? The figure that I threw out (AROUND 300whp), was based on a much lighter weight. Now, we know for sure, what the car weighs, and honestly, up until you made the claim that you had the highest HP N/A VQ, I had never even gone back to crunch the numbers. One thing is certain.. is takes "X" amount of power at the drive wheels to run "Y" mph, through the traps.
Again, please stop with this stuff, and just enjoy your car, Kevin.. If you think that Barry's car doesn't make the power that I'm showing it to make, then, that's fine. Go, and run your car at the drag strip, and see what kind of MPH you pull. I can tell you.. If you run the car at 300whp, on a 24.5 x 8.5" slick, and you can actually drive, then, the car will run some mid 12.40's @ 109-110mph.
Travis
This thread went to shiate faster than a fat guy chasing a runaway cheesewheel. List your WHP, or list your ET and be done with it.
The only thing I discuss are wins on the track. Nothing else matters. Maybe I should have a signature that says "Winningest SER in the World" Haha.. F'no.
Tune the VTC Kevin, check Aaron's timing.. and add some E85.
The only thing I discuss are wins on the track. Nothing else matters. Maybe I should have a signature that says "Winningest SER in the World" Haha.. F'no.
Tune the VTC Kevin, check Aaron's timing.. and add some E85.
DO NOT DO BUSINESS WITH THIS MEMBER - OWES PEOPLE MONEY
iTrader: (7)
Joined: Jan 2008
Posts: 3,468
From: Greensboro, NC
As this is highly entertaining. I was punching in stock SE-R sentra spec V trap times and 1/4 times with an average weight of 2900-2950 with driver into you calculator travis. It says 185-190 to the wheels, you think stock spec V or even with a header exhaust, CAI, etc is making 210-225 at the flywheel? (B15 models not the newer QR with a few extra HP) I was using
http://www.dragtimes.com/horsepower-...calculator.php
and yours. That is HP at the crank. We know for sure that QR25DE motors make 145 to the wheels maybe 150-155 with some boltons. Go right ahead and correct me if I am wrong about stock QR25DE HP though as I am sure you will.
http://www.dragtimes.com/horsepower-...calculator.php
and yours. That is HP at the crank. We know for sure that QR25DE motors make 145 to the wheels maybe 150-155 with some boltons. Go right ahead and correct me if I am wrong about stock QR25DE HP though as I am sure you will.
That other calculator, on the other hand... says 221 wheel horse power... yeah, that's accurate!!!
Also, plugging in 3100lbs and 12.29@110.74 into the dragtimes calculator puts you at 329 crank HP (290-295ish whp?). It may be on the low side, but I bet it's more accurate than the 328whp you get from the other calculator.
Last edited by sparks03max; Feb 27, 2010 at 08:44 AM.
