Turbo Boost

[Archive]

Match revs to vehicle speed so both gears are rotating at same speed and slip into or out of gear. You can practice by rolling along in 5th, give it enough throttle so there is no load on the drivetrain, now ease it out of gear and hold the rpms the same, now slide it back in with just a little pressure on the stick. If it wont go in easily then change the rpms slightly up or down to "Match" the gears until it slips back in. After you get the feel of this then try rolling along in 4th, slip it into nute and let the revs drop to where 5th should be. Put pressure on the shifter in fith and move the revs around a little until it "matches" and slips int 5th. Don't force the shifter into gear, thats how you break stuff.

The big trucks are actually easier because the mass is larger and the vehicle speeds and rpms change slower. Try it on a motorcycle. #ad


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1972 Chinook class C with 96/215 5spd, 4/5" exh, 4"BD, MagHytec, 85gal fuel, K&N RE0880, AutoMeter, 370's, BD gov kit, BD afc kit, 16cm, 16%btdc, yada-yada-yada
www.fostertruck.com/cummins



[This message has been edited by LarryB (edited 01-07-2001). ]

 

[Archive]

Ok guys. . I need some help.

I installed my boost gauge yesterday and I just need a little help in understand boost.

I installed my Boost tubing into the side of the engine, right next to the Map sensor, as told by Diesel Page.

But my question is this... besides that 3/4" reducer being a pain to get tight, how do I know if I have a boost leak or not? I noticed that if I really jump on the throttle, I can get up to 22. 5lbs of boost. This is with the EZ box on either 1 or 2 and even stock without the EZ even in. But when I am cruising down the road at say 45 or even 55, my boost goes down to what looks like 0. I have Autometer Ultralight gauges installed. I am just hoping that this is normal. If not should I move the boost tubing to the air intake? Will this be more accurate as far as boost readings?

Any advice would be greatly appreciated.

Thanks

Kev
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2k 2500 4x4 SB, Auto SLT, Camper Package, Tow Package, 3. 54 Dif, PowerEdge EZ, Ameraguard Bed Liner, Amsoil BMK 15 Dual Bypass and HDD 5w30

Soon to be installed: Pac Brake, and DTT's VB, TC, and can't forget the DD1 injectors

[This message has been edited by K_Arts (edited 01-07-2001). ]

 

[Archive]

These things pump alot of cfm when on boost. You could probably leave the plug completely out and you would not see a difference. I wouldn't worry about that.

 

[Archive]

K_Arts

That sounds about right. You must have a boost elbow installed to get to 22. 5psi.

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2001 Flame Red Sport, Auto, 4. 10, 4x4, LOADED!, DC Sport Brush Gaurd, DC Painted Running Boards, DC Splash Gaurds, Line-x over the rails, BFG AT/KO 285-75r16

1998 Durango SLT+

2000 FL60, 16 ft. Flatbed, Cat Powered

 

[Archive]

Originally posted by StakeMan:
You must have a boost elbow installed to get to 22. 5psi.

You got it Stakeman. I was actually surprised that with the elbow, I can make 22. 5 stock.

Any clue why I can not surpass 22. 5??? Even with the EZ box?? I ask cause this is where I get confused. A buddy and I installed our gauges together. He has a 2k1. 5 Auto with an HX-35 turbo and no muffler. . just like me. Why can he hit 30lbs of boost, but I am stuck at 22. 5? I didn't know if there is really that much difference with the 2k1. 5. Understand my confusion?

Kev



[This message has been edited by K_Arts (edited 01-08-2001). ]

 

[Archive]

I also shift without the clutch. My other ride is Mack 500hp with 18 speed. as far as boost, at 55 cruising, no boost whatsoever. If i drop the hammer, it shoots to 40 psi.

now, Can anyone here tell me how to modify a Mack. I need more power. about 800-900 hp should do. Can you adapt one of these boxes to a Mack?

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2001 3500 QC 4X4 Cummins H. O. & 6 Speed, Powermax 2 and needing more power!!!!

 

[Archive]

K_Arts,

Make sure all your intercooler clamps are tight. Pull the hose off the wastegate actuator, plug the hose and check max boost. If it exceeds 22. 5 then you need to adjust/replace the boost elbow. If it remains at 22. 5 then the problem is probably in the boost module portion of your fueling box.

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2001 QC SLT SWB ETH 6SP JRE Spa Fabritech Practical Solutions