6v92t larger injectors

[Scott & Heather]

Coach is at wwwilliams Grand Rapids. If we want to upgrade injectors from 70's what are our options and about how much should they cost (parts cost). Just want to be sure we don't majorly overpay for the injectors. Mechanical 6v92t turbo. New twin radiators (larger 8 tube units). I've seen cliff throw (I think) numbers somewhere in the $100 range per injector??? Does that sound about right cliff?



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[luvrbus]

Scott you need to change the turbo for a upgrade in power at Williams it is going to you $$$$ a guess over 3 grand with the 7g70 which you probably have you have 277 hp and 863 ft lb of torque 

I wouldn't go over the 7g85 injectors that will give you 330 hp and 1000 lbs of torque with the right turbo of course 

[Scott & Heather]

So can't go with bigger injectors without changing turbo? OK. So I'll stick with my gutless wonder and drink my coffee slowly as I ascend the hills at 25 mph lol. Thanks cliff. Always appreciate your help and advice along with the others here


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[lostagain]

A couple years ago, I installed 9G90s and a TV7512 turbo. Goes really good. 350 HP and 1020 ft/lbs on paper. The usable torque is between 1300 and 1900 rpm. I cruise at 65 mph at 1800 rpm.  Well worth doing.

JC


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[yvan]

Too me part of bus ownership is relaxation while on the road, I am never in a rush to get anywhere, and if hill climbing happens at 20mph, it allows me much more time to see the view, get familiar with my surroundings, and enjoy life.

[TheHollands!]

Good to see your bus moving again Scott.

[Scott & Heather]

Thanks Craig! Hoping to cross with you guys again. As for bus power, the issue right now is that we can't get above 55 mph right now and we also can't go more than 35 mph on gentle short grades in indiana or Michigan. Definite issues.


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[eagle19952]

Thanks Craig! Hoping to cross with you guys again. As for bus power, the issue right now is that we can't get above 55 mph right now and we also can't go more than 35 mph on gentle short grades in indiana or Michigan. Definite issues.


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fuel filters ?

[luvrbus]

That just a minor problem Scott 277 hp will take it down the road it's probably not getting full fuel caused by the cable ,shutdown or fuel supply

[wg4t50]

Being a gear head hot rod type, I would be playing the 9200 injectors, on the 8V-92,
did that with a good 6V-92 @ 450 hp turbo, as large as you can go easy and use the aluminum air box covers, there will be a fuzzy film around the covers but will not break off like the 9210 injectors will,  certainly will put a smile on ya.
DAVE M

[TomC]

The truck version with 9A90 injectors put out 335hp and 933lb/ft torque. The better spray pattern of the 9G90 will increae to 350hp and 1000lb/ft torque. I wouldn't go any higher than that on a mechanical engine with few gears. If you had a 13spd, then yes, go as big as you want. Good Luck, TomC

[HB of CJ]

Maybe you can conduct the chassis dyno test before the tuneup?  It almost sounds like you are having throttle or fuel flow issues.  Just a thought outside the box.  Maybe all you need is a good Detroit 2 Stroke Man give your mighty Detroit a good tune up?  I also would be interested in the chassis dyno before and after.

A good mechanic would know what to look for including rack adjustments, fuel lines, fuel purifiers, (speel check not working) (how do you speel filtures?) and fuel pumps along with looking at the induction system carefully.  Bad stuff does eventually happen.  Your problems might just be some simple adjustment.

If you go to just bigger injectors with no other changes, sometimes it is counter productive.  Lots of expensive other systems would have to be addressed like the turbo, an additional intercooler, air intake and exhaust.  All expensive. Sorry for the choppy post...slight stroke.  You should be going faster.  HB of CJ (old coot)

[bevans6]

FWIW changing a turbo is about as hard as changing the spark plugs on an old Mini (read into that about 10 minutes if the engine is hot) and rebuilt turbo's aren't that expensive.  I vote (like my vote had weight    ) to look for the solution to the power problem, get the 9G90's and the right turbo, and let your right foot decide how much power you need.  It's nice to have a few extra ponies, when you are going up that hill...

Brian

[eagle19952]

FWIW changing a turbo is about as hard as changing the spark plugs on an old Mini (read into that about 10 minutes if the engine is hot) and rebuilt turbo's aren't that expensive.  I vote (like my vote had weight    ) to look for the solution to the power problem, get the 9G90's and the right turbo, and let your right foot decide how much power you need.  It's nice to have a few extra ponies, when you are going up that hill...

Brian

but would you be willing to pick-up the labor charge over 10 minutes...

in reality it could take an hour ... 
occasionally the nuts are hard to get at and cooked onto the studs, and the pipes are often heat warped,

[akroyaleagle]

I think Clifford is the Messiah!

I think HB is onto something.

If it runs OK, maybe it needs a tune up, new air filter, new fuel filters, new fuel pump or just to have the turbo output tubes retightened.

Can you hear a whine at road speed?
Are you making smoke? when,? what color?

As others have said, there's no cheap way out. Larger injectors will require a turbo change.

My Canadian realiabilt came from remanufacture with 9A98 injectors. We left off the throttle advance. I drive it easy but I never lack power.