How much nitrous is too much?
#1
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Location: Arlington Heights Illinois
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How much nitrous is too much?
l've got a 1990 IROC-Z with a TPI 305 it's basically stock (68,000 miles) l'm currently running 100 horses worth of nitrous through it, it does awesome but l was wondering if l could squeeze out just 50 more with the stock settings, should l retard the timing, run more octane, wait to get an ignition system and adequate fuel system? has anyone else ever done this?
thanks very much
thanks very much
#2
I wouldn't try it unless you have the resources in case you roast it. I helped put a 250 on a stock 350 (against my suggestions) in an older nova, and I drove it. Couple of good runs in the 13's, then the COOLEST motor loss I have ever heard. Let's just say ventilated block... Stay with 100 and work the combo till you can build a NOS motor
#3
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Location: Mt arlington NJ
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Go ahead and run the 150.Myself and a couple of other guys have been running 150 jets for a long time in our 305's.Leave the timming stock at 6 degrees BTDC,you'll be fine.
Ive ran 82 nitrous/65 fuel,which is about 175 hp jets in my completly stock "BOTTOM"
305 with no ill effects.
Nitro Don
------------------
1990 Trans Am WS6
305TPI 700R4
ENGINE:
150hp NOS kit
March underdrive pulleys
Edelbrock headers(JetHot)
Mac off-road pipe
Flowmaster exaust
Jacobs ultra coil
K&N filter
Fulley ported base,
runners,& plenum
Crane AFPR
Hypertech airfoil
Crane 1.6 rockers
210/220 .533/.544 Cam
W/P Torquer heads
Edelbrock TPI Base
Edelbrock TI Runners
Edelbrock 52mm T.B.
TRANSMISSION:
Richmond 3.73's
Auburn posi
B&M Mega shifter
TCI shift kit
Vette servo
B&M 3-4 upshift kit
TCI Trans Rebuild
2800 stall 9.5" TC
Nitto Drag radials
FUTURE MODS:
BEST RUN:
12.48 @ 109.23 MPH
(with stock heads,cam,intake,and crappy Pep Boy's tires)
Ive ran 82 nitrous/65 fuel,which is about 175 hp jets in my completly stock "BOTTOM"
305 with no ill effects.
Nitro Don
------------------
1990 Trans Am WS6
305TPI 700R4
ENGINE:
150hp NOS kit
March underdrive pulleys
Edelbrock headers(JetHot)
Mac off-road pipe
Flowmaster exaust
Jacobs ultra coil
K&N filter
Fulley ported base,
runners,& plenum
Crane AFPR
Hypertech airfoil
Crane 1.6 rockers
210/220 .533/.544 Cam
W/P Torquer heads
Edelbrock TPI Base
Edelbrock TI Runners
Edelbrock 52mm T.B.
TRANSMISSION:
Richmond 3.73's
Auburn posi
B&M Mega shifter
TCI shift kit
Vette servo
B&M 3-4 upshift kit
TCI Trans Rebuild
2800 stall 9.5" TC
Nitto Drag radials
FUTURE MODS:
BEST RUN:
12.48 @ 109.23 MPH
(with stock heads,cam,intake,and crappy Pep Boy's tires)
#4
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Location: Miramichi, NB, Canada
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Car: 1986 Pro Street Iroc-Z
Engine: 383 Stroker
Transmission: 700R4
I'm with nitro don. My first time I ran 175 hp jets. But I didn't care and it was on the stock motor that has no compression right. The only thing I did to make sure it wouldn't blow was run a digital 6 to retard the timing when I hit the button and checked my plugs after every pass. 12.84 on that 86 305 tpi.
------------------
Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm
------------------
Jamie James
1986 Iroc-Z 305 TPI
1.90 60 ft 14.15@ 95.75
1.74 60 ft 12.84@107.75 on the bottle.
My IROC:
http://personal.nbnet.nb.ca/jjames/homepage.htm
#6
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Location: Panama City FL
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Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
You're running too much nitrous if:
- you win the race AND blow up your engine
- hmmm
That's about it.. As for your ride, I concur with the other posts.. I don't think 150 will harm your engine at all, as long as you don't hit it too early. With a shot that "large" on a 305, I'd be above 2500-3000 rpm before laying into the nitrous.
My bigger concern would be your transmission.. If it's a 700r4, especially going from the 1 - 2 shift on the spray. Since your car is a 90, it has a better tranny than my 86 did, so you might get away with it, especially with only 68k miles.
Have fun!
Steve
- you win the race AND blow up your engine
- hmmm
That's about it.. As for your ride, I concur with the other posts.. I don't think 150 will harm your engine at all, as long as you don't hit it too early. With a shot that "large" on a 305, I'd be above 2500-3000 rpm before laying into the nitrous.
My bigger concern would be your transmission.. If it's a 700r4, especially going from the 1 - 2 shift on the spray. Since your car is a 90, it has a better tranny than my 86 did, so you might get away with it, especially with only 68k miles.
Have fun!
Steve
#7
If you have a good mix & your fuel pressure is haning in there, too much is when you start to lift the heads or hear someone @ the door (knocking). if you run it lean, say good night francis.
personally, if were me & this is the commuter, keep it simple & small (100/125) if this is the toy, letter wail! once you have learned a ton on the N2O & blow it to the sky, it is time for a new motor. start on the small side. do a TON of plug cuts & remember to keep them "almost wet" learn what this stuff will do. it is pretty fantastic stuff.
there is a guy here in SD, that runs a 72 or 73 Firbird that has a low compression (8:1, 9:1) 468 BBC. he has nothing special in the car but 2 fantastic fuel systems & a ton of juice. he is running 3 systems & is in the low 9's. this is the 3rd car that he has dont this formula on (65 chevelle, in the high 8's/low 9's, & Ponty Monty white monte carlo w/BB Pontiac in it (has been in Car Craft). same formula, same results.
FWIW
BW
------------------
Bob Wooten
r71chevy@earthlink.net
www.r71camaro.homestead.com
personally, if were me & this is the commuter, keep it simple & small (100/125) if this is the toy, letter wail! once you have learned a ton on the N2O & blow it to the sky, it is time for a new motor. start on the small side. do a TON of plug cuts & remember to keep them "almost wet" learn what this stuff will do. it is pretty fantastic stuff.
there is a guy here in SD, that runs a 72 or 73 Firbird that has a low compression (8:1, 9:1) 468 BBC. he has nothing special in the car but 2 fantastic fuel systems & a ton of juice. he is running 3 systems & is in the low 9's. this is the 3rd car that he has dont this formula on (65 chevelle, in the high 8's/low 9's, & Ponty Monty white monte carlo w/BB Pontiac in it (has been in Car Craft). same formula, same results.
FWIW
BW
------------------
Bob Wooten
r71chevy@earthlink.net
www.r71camaro.homestead.com
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#8
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personally i think you are running too much nitrous when:
your nitrous system has more horsepower than your motor....
but BUILT NITROUS MOTORS are like that. Have a few friends with big juice and built nitrous motors.
they run mid to low 12s on motor and mid to low 9s on spray...
your nitrous system has more horsepower than your motor....
but BUILT NITROUS MOTORS are like that. Have a few friends with big juice and built nitrous motors.
they run mid to low 12s on motor and mid to low 9s on spray...
#9
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What about a LO3? Do yall thnk it could handle a 150hp shot?
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We are the futrue, the 21st. century dislexyic, glue sniffing, cyber *****, with homicidal minds and handguns.
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We are the futrue, the 21st. century dislexyic, glue sniffing, cyber *****, with homicidal minds and handguns.
#10
i find it so incredible what can come out of a bottle. the cars that run 12's on the motor & 9's on the bottle blow me away.
BW
------------------
Bob Wooten
r71chevy@earthlink.net
www.r71camaro.homestead.com
BW
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Bob Wooten
r71chevy@earthlink.net
www.r71camaro.homestead.com
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