If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Full Throttle Speed Tech Support > Turbo Buick > Buick 2 Step
User Name
Password
Home Online Store Product Manuals FAQ Members List Calendar Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 06-29-2010, 06:14 PM
stryker_561 stryker_561 is offline
Regular
 
Join Date: Dec 2006
Location: Alabama
Posts: 33
Default 2 step with Nitrous to spool

Rod again, Im about to add a "nos" shot(75hp) to my combo and I was wandering since I was going to cut the nos once I hit 15psi shoud I tie the timing retard side of the 2step to energize and cut with the nos via the same pressure switch. "Or" does 75hp shot require any retard. This is new ground for me. My combo seems a little slow on spool in the 1/8. Most of the tracks are 1/8 near me. Any other suggestions are welcomed. See my "sign" fo my current combo. Eric M. if you are out(or anyone else who has time) there feel free o call me@256-790-9496. We have a very short track(local get together) which is probably only 500 ft. long and I need all the help I can get to get on boost and 60ft. I try to uplift our buicks at every measure.
__________________
87 GN 109 block,champion irons and matching intake,pt72/GTQ,83lbs inj.,ptfm cooler ,3500 (real Art Carr)non-lock-up conv.,.040 forgings, balanced and blueprinted crank, steel centers, ARP Studs and ,223/223 flat tappet Reed cam,poston headers,65mm tb,plenum spacer,Maftpro,LM1,Bailey Eng 2-step,TH 3" DP,Directscan, 3"exhaust,Delta gate, trans brake,3.42,31/2 fronts,8 1/2 rears, 90/10 Comp. Eng frnt shocks. 50/50 rears, dual airbags,Tomca 4" C.A.K ,75hp "Sniper" spoolin shot of NOS. Dlbl Pmp
Reply With Quote
  #2  
Old 06-29-2010, 06:23 PM
TurboBob TurboBob is offline
Resident Mad Scientist
 
Join Date: Mar 2004
Location: Near Detroit
Posts: 7,625
Default

Quote:
Originally Posted by stryker_561
Rod again, Im about to add a "nos" shot(75hp) to my combo and I was wandering since I was going to cut the nos once I hit 15psi shoud I tie the timing retard side of the 2step to energize and cut with the nos via the same pressure switch. "Or" does 75hp shot require any retard. This is new ground for me. My combo seems a little slow on spool in the 1/8. Most of the tracks are 1/8 near me. Any other suggestions are welcomed. See my "sign" fo my current combo. Eric M. if you are out(or anyone else who has time) there feel free o call me@256-790-9496. We have a very short track(local get together) which is probably only 500 ft. long and I need all the help I can get to get on boost and 60ft. I try to uplift our buicks at every measure.

with the 75 shot you can most likely do it without any retard. You could probably just leave the N2O flowing for the whole run, instead of cutting it off...

B
Reply With Quote
  #3  
Old 06-29-2010, 06:34 PM
stryker_561 stryker_561 is offline
Regular
 
Join Date: Dec 2006
Location: Alabama
Posts: 33
Default

Bob Im not ashamed to say that I am new to Nitrous and slightly afraid to hurt my motor. Im just getting comfy with the Maft pro. Are there any suggestions based on my othe posts that will help me safe guard and maintain the intergrety of our buicks among the "Non Buick" believers?. Just cut it on(above 2500rpm& full throttle) and let it go is what you are saying. I I believe the only dumb question is the one not asked. Of course if I see anything going wrong via Knock det, etc. I will lift.
__________________
87 GN 109 block,champion irons and matching intake,pt72/GTQ,83lbs inj.,ptfm cooler ,3500 (real Art Carr)non-lock-up conv.,.040 forgings, balanced and blueprinted crank, steel centers, ARP Studs and ,223/223 flat tappet Reed cam,poston headers,65mm tb,plenum spacer,Maftpro,LM1,Bailey Eng 2-step,TH 3" DP,Directscan, 3"exhaust,Delta gate, trans brake,3.42,31/2 fronts,8 1/2 rears, 90/10 Comp. Eng frnt shocks. 50/50 rears, dual airbags,Tomca 4" C.A.K ,75hp "Sniper" spoolin shot of NOS. Dlbl Pmp
Reply With Quote
  #4  
Old 06-29-2010, 07:05 PM
TurboBob TurboBob is offline
Resident Mad Scientist
 
Join Date: Mar 2004
Location: Near Detroit
Posts: 7,625
Default

just start with a 35 shot and see what you get. Are you injecting the N2O dry or wet? (just nitrous, or is there a fuel solenoid and jet also)?

Assuming you have no traction issues, I would hit the N2O the moment you release the brake/2-step.

Set the car for 2 to 4 psi lower than usual, and leave the N2O on, dial it in at 11.5:1

Should be good, just go slowly and see what you get.

Bob
Reply With Quote
  #5  
Old 06-29-2010, 07:12 PM
stryker_561 stryker_561 is offline
Regular
 
Join Date: Dec 2006
Location: Alabama
Posts: 33
Default

Wet system
__________________
87 GN 109 block,champion irons and matching intake,pt72/GTQ,83lbs inj.,ptfm cooler ,3500 (real Art Carr)non-lock-up conv.,.040 forgings, balanced and blueprinted crank, steel centers, ARP Studs and ,223/223 flat tappet Reed cam,poston headers,65mm tb,plenum spacer,Maftpro,LM1,Bailey Eng 2-step,TH 3" DP,Directscan, 3"exhaust,Delta gate, trans brake,3.42,31/2 fronts,8 1/2 rears, 90/10 Comp. Eng frnt shocks. 50/50 rears, dual airbags,Tomca 4" C.A.K ,75hp "Sniper" spoolin shot of NOS. Dlbl Pmp
Reply With Quote
  #6  
Old 06-29-2010, 07:41 PM
stryker_561 stryker_561 is offline
Regular
 
Join Date: Dec 2006
Location: Alabama
Posts: 33
Default

Bob(Your opinion), With a 3500 stall where would you set the 2step at(rpm) to get that flash and slingshot effect off the line. I dont think putting at 3200 would help much in that area. Is there any suggestions to get off the line as fast as possible. I have a NON lockup "O" code converter(Art Carr).
__________________
87 GN 109 block,champion irons and matching intake,pt72/GTQ,83lbs inj.,ptfm cooler ,3500 (real Art Carr)non-lock-up conv.,.040 forgings, balanced and blueprinted crank, steel centers, ARP Studs and ,223/223 flat tappet Reed cam,poston headers,65mm tb,plenum spacer,Maftpro,LM1,Bailey Eng 2-step,TH 3" DP,Directscan, 3"exhaust,Delta gate, trans brake,3.42,31/2 fronts,8 1/2 rears, 90/10 Comp. Eng frnt shocks. 50/50 rears, dual airbags,Tomca 4" C.A.K ,75hp "Sniper" spoolin shot of NOS. Dlbl Pmp
Reply With Quote
  #7  
Old 07-03-2010, 10:15 PM
stryker_561 stryker_561 is offline
Regular
 
Join Date: Dec 2006
Location: Alabama
Posts: 33
Default

Next Question....Nitrous paperwork for EFI system sets calculation on Hp gains per jet selection based on 43psi_+ 5psi fuel pressure. It seems that it doesnt cover the fact that as boost rises fuel pressure also rises. At higher boost the calculations goes out the window. Any suggestion on a remedy being that the nitrous jet stays stagnent at the 44-48psi calculation. I wonder if a seperate regulator is needed to keep the fuel selinoid set at that calculated pressure to give the added hp gain "ie" 35,50,75. Maybe I have to cut it off at a certain psi and just run on boost after spool. Anyone else experiment at running all the way with a small shot or just cutting after spool?
__________________
87 GN 109 block,champion irons and matching intake,pt72/GTQ,83lbs inj.,ptfm cooler ,3500 (real Art Carr)non-lock-up conv.,.040 forgings, balanced and blueprinted crank, steel centers, ARP Studs and ,223/223 flat tappet Reed cam,poston headers,65mm tb,plenum spacer,Maftpro,LM1,Bailey Eng 2-step,TH 3" DP,Directscan, 3"exhaust,Delta gate, trans brake,3.42,31/2 fronts,8 1/2 rears, 90/10 Comp. Eng frnt shocks. 50/50 rears, dual airbags,Tomca 4" C.A.K ,75hp "Sniper" spoolin shot of NOS. Dlbl Pmp
Reply With Quote
  #8  
Old 07-04-2010, 10:46 AM
TurboBob TurboBob is offline
Resident Mad Scientist
 
Join Date: Mar 2004
Location: Near Detroit
Posts: 7,625
Default

the fuel rail pressure has to rise, because you are spraying into a pressurized pipe. The pressure difference from the rail to the other side of the nozzle stays the same, so the pressure rise is cancelled out. You don't need to use the higher rail pressure in the jet selection.

On the 2-step settings, considering you are going to spray some N2O right off the line, I would set it to an RPM that you can spool to almost instantly and gets the turbo turning decently. I'm not sure how much time you will have to stage, etc.

is the 3500 RPM stall speed you mention at 0 psi or 5 psi?

B
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 05:42 AM.


Powered by vBulletin Version 3.5.2
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright Full Throttle Speed & Style All Rights Reserved