A good idea for nitrous board-how fast does x shot make u go

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A good idea for nitrous board-how fast does x shot make u go

Postby r0nin89 » Mon Jan 18, 2010 4:08 pm

I'd hope perhaps this thread will evolve into a sticky. Its a good thing to give people like me who are planning builds an idea of how big of a shot they need to go the speed they wanna go at the track. So for instance post some general motor, trans, rear, tires, traction adder specs and an all motor time for your truck. Then post either an estimate or ET with how ever much of a nitrous shot you added.

For example I'll post what my build will be with estimates for numbers

421 Ci
195 cc AFR heads
RPM Performer Manifold
750 Double pumper
60105 Lunati Voodoo
3000 rpm stall
th350
26x10 radials
8.8, 3.73, posi, caltracs

Desktop dyno has it at 500hp and 500 ftlbs but based on the more radical cam, bigger heads, and 14 more cubes in comparison to The Impersonator II 406 build this motor should be more like 550hp and 525Ft/lbs

ET 11.2 quarter mile

with a 100 shot

ET 10.2
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby WRKTRKFROMHELL » Tue Jan 19, 2010 10:29 am

too many verieables.
IT'S NOT A TRUCK IF IT CANT
CARRY A LOAD.
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby speeder » Tue Jan 19, 2010 10:53 am

HP/weight is one scenario you must consider and most people ignore. Another thing is how well you can put the power to the ground which is dependent on how well you set up your suspension/transmission. Yet another aspect is the cam that you run, which can rob your nitrous from power if it is not a nitrous cam.
With all that said, you will be appreciably faster with nitrous than without.
A whole second faster with a 100 shot? I cannot see the math that would allow an S10 with those power numbers to improve a whole second on the small of a shot. If you can show your work, maybe you can show me how that would happen.
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby specv44 » Tue Jan 19, 2010 11:46 am

My truck gained 1 full second on a 100 shot, spraying off the line.

400hp 358ci v8 (hyper pistons, .477/.480 cam, torqer intake, longtubes), 700r4, NO STALL, 26x10.5x15 slicks, 3.73 rear with locker, Rickracer slapper bars, summit drag shocks front/rear. Spraying off the line, leaving off idle, footbrake. Unsure on weight, but it was a reg cab 2nd gen, interior gutted minus door panels/dash and 2 bucket seats, 6 point cage. went 13.0 on motor, 12.0 on 100 shot.

Proof: Rickracer made that pass in my truck :thumbup:
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby Rickracer » Tue Jan 19, 2010 12:41 pm

Twice! I actually ran both .0 passes, Jon went 13.2 na,12.2 on gas, I went 13.0 na, and 12.0 on gas, the difference was that I was leaving off idle, Jon was preloading the converter. :thumbup:
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'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 8.0 in the 1/8th, 12.75@106 mph in the 1/4, gonna spray it soon... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby r0nin89 » Tue Jan 19, 2010 6:22 pm

speeder wrote:HP/weight is one scenario you must consider and most people ignore. Another thing is how well you can put the power to the ground which is dependent on how well you set up your suspension/transmission. Yet another aspect is the cam that you run, which can rob your nitrous from power if it is not a nitrous cam.
With all that said, you will be appreciably faster with nitrous than without.
A whole second faster with a 100 shot? I cannot see the math that would allow an S10 with those power numbers to improve a whole second on the small of a shot. If you can show your work, maybe you can show me how that would happen.



I'm not making any claims that was just an example of format.
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby graysonautomotive » Thu Jan 28, 2010 9:28 pm

360 sbc
2.05 1.60 world product aluminum heads
victor jr
forged eagle crank,srp forged pistons, eagle h beams
750 holley
comp cams solid roller
3500 boss hogg converter
th400
26x10 m/t slicks
8.5 with 4.11 and a posi,with traction bars

12.20 109mph on motor
11.08 118.5 on 100shot :boink:
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby speeder » Fri Jan 29, 2010 5:44 am

I am impressed! Your trucks must be pretty light. Can you all say something about weight also, I am interested to learn more. :D
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby Rickracer » Fri Jan 29, 2010 6:42 am

Weight definitely has something to do with it Peter, but I think in this particular instance, it's more about the motor and motor/trans combo, some motor's just respond better to a small shot than others. For instance, the real weak link in Jon's truck was the stock stall speed. The 100 shot (probably at least 150 ft.lbs. of torque), really kinda overcame that, and raised the stall enough to get it out of the hole a lot harder. His truck probably would have gone at least .2~.4 quicker N/A with a looser converter, but the difference between N/A and juicing would have been less dramatic. 8)
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'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 8.0 in the 1/8th, 12.75@106 mph in the 1/4, gonna spray it soon... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby specv44 » Fri Jan 29, 2010 7:28 am

^^^

Yeah, what he said lol.
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby Rickracer » Fri Jan 29, 2010 7:34 am

Do you remember the difference in the 60' times Jon? Or still have those time slips handy? :?: 8)
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ASE Certified Master Automotive Technician (well over 3 decades of experience, :thumbup: )
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 8.0 in the 1/8th, 12.75@106 mph in the 1/4, gonna spray it soon... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby bgblock427 » Fri Jan 29, 2010 8:53 am

380 ci sbc (3.5 X4.165)
afr 227 heads 2.1X1.60
brodix intake
950 holley
4700 coan converter
Glide
29.5 x 12.5 mt et drags
4:30 gear
2850 lbs
10.57 N/A.
9.87 with a 75 shot. 1.30 60 ft.average
"There is no charge for awsomeness or attractiveness" Kung Fu Panda

9.39@149 best so far
1.26 60'
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby specv44 » Fri Jan 29, 2010 10:44 am

Rickracer wrote:Do you remember the difference in the 60' times Jon? Or still have those time slips handy? :?: 8)


I have looked, IDK where they went to. I'm sure I posted the slip info on here somewhere.
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby speeder » Fri Jan 29, 2010 10:59 am

Wow that is cool! Thanks for the data and the explanation, that makes sense. I would be interested in the cam specs, since they say that makes a huge difference. Like the degrees the exhaust valve starts to open and how long is stays open. Does it make a difference?
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby graysonautomotive » Fri Jan 29, 2010 3:57 pm

last year my truck weight in at 2775 with a full tank 3015 w/me
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby TomZ » Wed Feb 03, 2010 12:01 am

I can give you an idea...

'69 Dodge Coronet - "Street Racer Setup" - before 500 CID Indy

Weight with driver, 3415 lbs
.030 440 block with 10.75:1 forged six pak pistons with factory crank
Indy 440 SR-1 heads
Comp Magnum solid roller
Mopar M1 single plane
1050 CFM Holley (custom... not a dominator)

Top Gun 300 shot

Race-prepped 727 with Turbo Action components (reverse manual... full internals)
Mopar 2800 stall "Hemi" converter (flashed to 5000 on the jug)

8 3/4 "Sure Grip" with 3.55 gears, 29x12.50-15 Hoosier Dirt Bozz

Six cylinder B-body torsion bars

Super Stock springs with pinion snubber snubber set 1" from plate on trunk floor.

On the motor.... 12.90 @ 119 MPH ... built to use the nitrous AND was an absolute money maker on the street.

On the jug... 10.32 at 138 MPH (best) ... actually bent the roof above the B-pillar on both sides of the car on that particular run... with the weld-in subframe connectors. Asked to leave MIR for lack of, well, everything. :D That was at the '93 MIR Speed Shop Challenge.

The car only got faster from there... but the nitrous setup was absolutely LETHAL on that particular combo. So there you go... 2.5 seconds off the quarter.

FYI... we went with the 500 CID with the bigger Indy head going foward. The 440 with the factory forged crank and TRW pistons took a serious beating. It lasted, but we could tell that the force of the "hit" was really taking a serious toll on the bearings. The cheap "Six Pak" pistons did okay though!

FYI... the engine had less than 3500 in it back in '93.

I'm trying to leave the nitrous thing alone these days... it's like crack for me!! :shock: 8)
TomZ

'87 S10 shortbed - 355
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Re: A good idea for nitrous board-how fast does x shot make u go

Postby v8sten » Sun Feb 20, 2011 8:38 pm

street truck set up

3200 lbs full weight
385 stroker 4.040" / 3.75"
dart pro1 230 heads
comp cams extreme energy solid flat tappit xe294s-10
victor intake
750hp holley carb
275 big shot plate
th350 with a worn out tci super street fighter stall
moser 9" w/ 3.50 spooled
295/65r15 micky thompson drag radials

11.60's na
9.90's spray
1994 s10, 383, th350, ford 9"

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