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jskattum606
Well-known member
Wondering if anyone has any hints to get this motor running a little more snappy. Will lowering the starting angle on the helix help? what RPMs are you guys running.
The Lazy 900
- Thread starter jskattum606
- Start date
J
jskattum606
Well-known member
As of now the turbo is a Garrett 2871 BB with a .86 exhaust housing. MTX weights @ 80 grams grn/pink primary spring. Gearing is stock for the 166" 19/39 i want to say. Strait 48 helix ill check on the spring. Holding 7650 RPMs now. Can i go higher? or Should i?
Everyone says run these 9s at like 7700 rpm or so, Maybe it's just mine but the last time I ran it, I was running 7800-7850 all day long and never ran better. Idk if that is out of its rpm range or not, but seems like It would hold the R's better there. With boost you should have no problem running a little higher Rpm! But then again, I could be completely wrong!
dude, more boost... whats bottom end??
Mine on 10# seems kinda lazy down low, when it was running 14 the other day it just seems to snap to quicker as the wastgate is just hammered closed until your up to full RPM... if your set at 8# the wastegate is begining to open a bit before that so your just not gonna get the same snap down in your low/mids... the obvious solution.. MORE BOOST!!
Mine on 10# seems kinda lazy down low, when it was running 14 the other day it just seems to snap to quicker as the wastgate is just hammered closed until your up to full RPM... if your set at 8# the wastegate is begining to open a bit before that so your just not gonna get the same snap down in your low/mids... the obvious solution.. MORE BOOST!!
J
jskattum606
Well-known member
Im gonna Drop some weight and see how she does. Ill let eveyone know. Thanks for the help. Im just to used to my snappy rev feel. This sled has always been slower reving.
Snappy --
HighMark in Boise Built my 900.
Its Real Snappy. Like point and shoot and hold on.
05 900 166 ---
HighMark in Boise Built my 900.
Its Real Snappy. Like point and shoot and hold on.
05 900 166 ---
It doesn't matter who builds the motor, these EFI motors will always have a little less throttle response than a carb sled. I wonder how much those new pistons and whatnot in mine will help. 140psi compression vs the 90 that I have been running all season haha.
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jskattum606
Well-known member
What kind of RPMs are you getting, Or did they recomend anything? I think ill just let her rip till it dosent like the rpm then add a little. thanks Outlaw
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Spaarky
Well-known member
Sorry I think I came off a little harsh, I didn't mean to bash or sound like a know-it-all! My bad! I know that there are some snappy EFI sleds out there, but I haven't ever seen a 900 that is responsive enough to write home about. I guess some are better than others, but these 900s are kinda like a big NA cummins, just torquey, but not super snappy like a dragster or anything.
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High Velocity
Well-known member
jskattum606, I'm not positive on the '05, but on my '06 the rev limiter is at 8050 rpm's. She falls on her face fast when I hit the limiter. Turbo or not, I'd be clutching it to run 7800-7900 max so your not bouncing off the limiter all the time.
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Spaarky
Well-known member
Speedemon... was just telling you my experience, you didnt come off anyway to me. Everyones experiences can be different, that is what can be good and bad about this site, everyone has a opinion.
I understand the efi frustrations... it really feels like you have your hands tied sometimes. Maybe the 900 isnt "snappy" but he should be able to get a good throttle response out of it. I guess that is what I call snappy.
There has to be a way around that limiter. I would talk to someone and see if that can be programmed out of the ecu. I am not real familiar with the 9's, just trying to put in general turbo knowledge....
I understand the efi frustrations... it really feels like you have your hands tied sometimes. Maybe the 900 isnt "snappy" but he should be able to get a good throttle response out of it. I guess that is what I call snappy.
There has to be a way around that limiter. I would talk to someone and see if that can be programmed out of the ecu. I am not real familiar with the 9's, just trying to put in general turbo knowledge....
Ill try and look at the Tach
Pinned riding trees uphill its a little hard to look at the Tach. Usually if I am on a straight climb I back off to about 3/4 throttle for control issues, and it climbs better.
Will take notes and get back. I need to get the Ratchet issue under control.
Found a set of Avids on the shaft used , the Track is basically new but I think the old drivers are shot, too bad they didn't replace the drivers wit the new track.
This is my first year on this sled.
Pinned riding trees uphill its a little hard to look at the Tach. Usually if I am on a straight climb I back off to about 3/4 throttle for control issues, and it climbs better.
Will take notes and get back. I need to get the Ratchet issue under control.
Found a set of Avids on the shaft used , the Track is basically new but I think the old drivers are shot, too bad they didn't replace the drivers wit the new track.
This is my first year on this sled.
