Please show what HP "shot" you guys were running too.

 

...12.30's on motor
...11.40's on 100-shot

I drive it to work, except in the winter.

RSR

 

the only car I tested both ways was the 85 "JYD" w/355 13.60's motor and 11.90 ](movie) on a 150 nos carburated powershot with the TPI (#5151) jets for my carb intake converted to fuel injection. remember we race at 6000 ft thats why I get more than a second for the 150 shot.

 

These are my old times from 1999:

Motor: 13.3 at 108
Motor and 150hp NOS: 12.2 at 122

The nitrous run was from about 40mph on up (2nd + 3rd gears).

The car is tuned perfectly and probably runs in the mid 12's at 112mph or so on the motor. Add the 13mph from the NOS on top of that and you get 125mph or so in the mid-low 11's.

Don't forget the faster the car is, the less it helps. This also applies to modified motors (NOS is less effective than for a stock motor). It may add 100hp on top, but may add 175lbs o'torque down low, this is why the ET is helped so much compared to something like a vortech or paxton. It also makes your tq converter stall higher because of the increased bottom end.

 

check out my sig....100 shot

 

1990 IROC-Z 305 TPI TH700R4

Mods
-Accel siamesed runners
-TransGo shift kit
-Dynomax 2 1/2 exhaust
-150 HP by NOS

Best run naturally aspirated
-15.283@ 90.38 MPH

Nitrous Run
-13.403@ 103.66 MPH

l hit the nitrous in 1st gear, at about 2,500-2,600 RPMS

 

Yea i can see u guys r makin alot better time off NOS and im plannin on gettin a 150 shott... but when is the best time to hitt the button out on the track or out street racing??

 

hit it whenever your heart desires

 

see sig

 

buttons are old fashioned.. WOT switch + window switch is the way to go..

I turn my NX setup on in second gear.



12.72 @ 116.4 NA
11.81 @ 131 Gtechd (woo, enter the gtech flames.) 150 wet shot NX

done on the ever so sticky kumho ecstas.

 

Ran a NOS #5176 LT1 dry nitrous system on my old 305 TPI. Best on motor was 13.65 @ 101mph and best on an 80hp shot 12.81 @ 109.5.

 

ok, so I did it wrong

 

Stock 305 tpi t-5 w/ 1 5/8 slp's.

motor 14.89
100 shot 13.53

After math .......

 

is that a normal failure?? At the oil control ring?

 

Yeah I thought the same thing. It came out of #4 hole.

None of the other pistons look bad. Could be just a bad slug went bad after so many miles. I only threw about 15 bottles using a 100 shot at it.

Not to worry a new stroker is on it's way.

 

12.4 @ 110 natural
11.3 @124 with 150 shot spinning horribly

 

Looks like alot of you guys are getting an additional 12-14 mph on 150 shots and 8-10 mph's on 100 shots in the 1//4 mile. Can't wait to get mine on the track as soon as it opens I'll be running the NOS #5151 150 shot on a GTA that went 13.9 @98MPH. Think high 12's are possible??

 

High 12's will be easy with a 150 shot if you can get the car to hookup.

 

I'll definitely be running my Drag Radials at 18-16 psi.

 

Ever so Slightly Off topic, Just curious Anyone running BLOWER + nitrous ? What are the gains there? and what type of blower?

 

from experience I believe the piston pictured possibly suffered a common failure due to the second ring (oil control) locking (momentarily) in the bore from insufficient ring end gap and the ends butting during expansion. I have also seen similar results from power adder cars (turbs,blows, and nos) that made the mistake of using total seal rings. they dont butt and lock like regular gapped rings instead excessive pressure builds up between the 1st/2nd rings resulting in spectacular failures like perfectly cleaved off piston tops and some similar to that on pictured above. when building a motor tat could be exposed to nitrous remember to err on the side of excess when gapping the rings. I have had similar run ins here is just one that was run with no fuel on a NX 300 hp shot for about to the 1000 foot mark and shut down the car exibited no ill effects for the remaining 2 or 3 thousand miles we drove it on the street until the end of season tear down. I love these tough little TRW anvils.

 

You guys must have some new times now that the tracks are open again.

 

I don't have any new times yet. I'm still waiting for the heads.

That piston looks similar to mine. I understand the ring expansion and my new motor is gapped accordingly.

BTW Mine was a stock slug and had 115k miles on it before I flogged it. The pistons haven't been out since they were installed by the factory.

Tom: That one is a TRW?

 

yes, it is trw, they are my favorite little subjects of abuse, my little mistreated anvils. right on for you on the ring thing. at the risk of opening a can of worms we run backwards mix of stock style ductile iron and moly rings on our big nitrous motor.

 

I love my broken parts collection. Good bench racing subject material.

stockmstyle ductile iron ????

There's enough worm's here to go fishing.


This must be a race only motor that you run right away after rebuild.

 

AAAAARRRGGGHHHHH!!!! 13.7 @97 150 shot, spun all of first and second gear on heated BF drag radials @14 psi. Crazy torque baby!Engine pinging at end of 3rd gear due to high heat range platinum plugs. less than 600 psi in bottle(no bottle warmer at the time).

 

how fast is your car off the juice??? my car won't even go with 600 psi in the bottle.

 

my best time was 13.9 all motor at 97 mph with 1.90 60 ft.. it's a world of difference with the bottle warmer and 900 psi with the corect heat range plugs.

 

I thought platinum plugs and Nos were a :nono:!

 

they are. got Delco R43TS now. no more pings

 

So you should be in the low to mid 12's at least.

Have you improved on that .2 sec gain?

 

so you gained no hp with the juice?? Why does your car only go 97 mph in the 1/4??

 

haven't had the chance to hit the track lately. I'm also looking into slicks and in the process of a ZZ4 with AFR 190 heads. we'll see

 

I had to let off the throttle because car was pinging towards the end of the track due to stock heat range platinum plugs.

 

no, without the juice. have you not installed your better heads yet or something??

 

yeah 13.9 @97 was on stock bottom end and stock heads off the juice. ZZ4 and AFR's are in the works

 

good, you scared me

 

sorry I corrected it to read stock style instead of stockmstyle. actually it is on a an EFI, plated, insured daily driver that placed 11th in qualifiying at the PSCA race at phoenix with a 9.66 (the same race the car magazines slow under weight mustang got booted out of) Its a stang but its what we got till I get my act together on one of my two damn project 3rd gens. In need of; EFI manifold to fit 1206's, TB, and BIG heads.

 

see sig. Having a custom 4" CAI made(those times were thru the stock plastic intake )then I`ll pill it up another 50.

 

It's been a while but i finally got the motor together (ZZ4 Block, AFR 190's) and ran N/A with a 13.39 @104 and 11.97 @113 on a 150 shot with the bottle warmer and 1000 psi of bottle pressure. These runs were on Mickey Thompson ET Streets.

 

What jets will you use for the 200 shot? Would you know what a 175 shot would be?? I'm using the NOS Kit #5151.

 

Upon blowing up my good block trying to make a pass
with the charger and a 100 shot - on that pass I ran 10.32
@ 133 with a 2.1 60 ft (lots of spin) should have gone high 9's.
After that pass I replaced that block with a stocker out of my old truck,put on my heads,cam and 100 shot only (no charger)
10.89@ 125


__________________

 

14.82 on motor.14.07 on 75 shot hit.off line in all gears.I to want to bump it up but worried about timing set please see my posted mess. 20 times seen but no response.