S
It did, and thank you!
Any updates on the Trygstad 872R motor
- Thread starter scratley
- Start date
It did, and thank you!
F
can you give us the specs on your primary, pin weight primary spring and ramp, its a easy way to find your hp out, they make a good dyno
T
well we have gone to the dealer and stuck it on a laptop and found ,air senser and DPM problems.So we start again added two florites to the back off air boxs to help with plugging air filter,but we've gone from 540,560,580,600 and know i'm going out to find 620 and 640 .the more jet we add the HARDER it pulls .I'm thinking I should try more av maybe straight .
Awesome phone call this am, buddy !!! Cant wait to get this freakin engine in my hands. Keep up the good testing work man....I'm sure Dave appreciates it:first:...I know I do !!!
T
yep thanks sean, we do have LITTLE diff domes ,but dave recomends little better fuel witch we exspected with these dome's.
T
800R Bore Limits.
Great question, Bigger is not better in 800R oem cylinder, We could have had any size piston made for my Big Bore engine kits, We bore our own cylinders in house and know how much material is in that cyl by boring to where we went into grey areas of the castings,
We have built 880's and after testing and running for a period of time we did a check on the bore and did not like what the bore gauge showed due to thin cyl walls in many areas, o-ring sealing and cyl skirt areas,
We build the 872 Bore size for these reasons to give our customers the best product we have to offer and continue to update our products on this great engine,
Dave @ Trygstadmotorsports,
Dave @ Trygstad Motorsports
Great question, Bigger is not better in 800R oem cylinder, We could have had any size piston made for my Big Bore engine kits, We bore our own cylinders in house and know how much material is in that cyl by boring to where we went into grey areas of the castings,
We have built 880's and after testing and running for a period of time we did a check on the bore and did not like what the bore gauge showed due to thin cyl walls in many areas, o-ring sealing and cyl skirt areas,
We build the 872 Bore size for these reasons to give our customers the best product we have to offer and continue to update our products on this great engine,
Dave @ Trygstadmotorsports,
Dave @ Trygstad Motorsports
T
Fred what are you running ?I'd like to try some diffrent set ups,we changed out are steel thundershift arms and changed out the 433's for 441,stock arms and the pins are 22 grams with 160-320 pp/pp clicker #3 ,helix straight 42 stock spring,but like i said earlier still finding more power jetting.So i'm curious to see if your clutching would work for mountainhigh?
S
What elevation are you running? You are pretty close to what we have in the 860. We run helix around 45. Not sure exactly on the weight (solid pin, stock arm/roller). 441 ramps-always thought I had 417 in the 860, but it was the wrong sled. Pulled a little weight out the other day, 441 shouldn't need as much weight to close the primary. We'll see, might not have enough weight now. Not sure of springs, whatever stock '08 had, 1800 miles on them so I imagine they probably are getting a little sacked out. I think you need more helix angle, made a big difference on Madmini's, load that motor, you'll be very happy.
T
Thanks solids are 16 grams or long solids are 18.8 I beleave. I have a shock wave ,but need to order new rollers again. I also was going to try a 46-42 thanks all very helpfull .I'll pull some weight and go up in helix.Thanks again :face-icon-small-coo
That setup sounds like its running good. Why track you running? What elevation? What kind of track speed climbing in deep snow? If you can pull 60mph at 6k with a 162 2.5 then the 872 is making some good power!
WOW.....i am getting itchy for my engine....where is that damn plane?
M
fred my clutch has 433 ramps with over sized rollers 1mm+ a 160-290 spring I'm not up on all the weights for my arms but it has 3-6mm screws two on the left side of cotter pin and one on the right side with a full length set screw on the left side that is hanging out of the arm and I run in clicker 1or 2 and my shockwave is almost all the way out you can ask swrev the more I turn it out the faster the sled got on the hill was dead even with his 860 with my sled on clicker 1 with my helix all the way out turned it in half a turn and game over I have a 174 track and have been seeing 41mph track speed climbing and even saw a couple 44's thats climbing I cant say anything bad about the way my sled has been running I'm shur there are sled that will hand it's *** but for a mountain sled with a 174 it's shur fun beating sleds with 155 tracks can't wait to see what it's like with all of Dave's updates and my 162 3" with bigger jets :face-icon-small-coo
S
First liar never stands a chance, you'll have the lowest track speed of any sled out there for being honest. It should be noted that when Mini says climbing, that means the 174 is digging for China-most other sleds at this point are either stuck or have turned around. Track speed given by most appears to be climbing a highway. My turbo track speed at the point of getting stuck or flipping over, is usually upper 40's. Dry/light snow low 50's.
P
Oh no Fred gets way higher track speeds than that with his 880 and etec turbo. LOL
I don't put much into peoples track speeds on the net as i have passed a few that run alot higher speeds than i do.
Mine always is slower than the net speeds! Must have something wrong but sure works good so far.
Cheers guys
M
well just got done putting my shorter track on and I've even went with a 15 wide to try and see what track speed my 872 will pull I dont know about freds track speed i think he has 7 tooth drivers and makes them look alot higher or something because my buddy with his 880 is telling me he is getting about the same as me i just hope make swrev really wonder if his turbo is worth it think the 15 3" will be the ticket haha know should be fun
A buddy of mine put a 15x163x2.5 peak on his turbo and loved it. Said it was way better than the 16wide.
M
well got back from the expo yesterday and got to ride one day even if it rained on use was hopeing that swrev would say something let him ride my sled and I rode his turbo xp and we raced and he pulled me out of the hole hard on my own sled really had to have everthing just right to get the turbo to pull out of the hole as hard as the 872 and the 3" 15wide track I was seeing 55mph track speed when we where running the two sled up a hill couldn't really find any hills to see what track speed I could pull climbing snow was very unstable saw a couple big slides 5' at the crown one of the the climbs we like to play on but got 8" at my house of new snow so hope to get my dad's sled put together so we can try out all the big bore's in good snow :face-icon-small-coo
Last edited:
Is the 872 only for the carb sleds or can you do an ETEC that way? Cost on an ETEC?
S
holy **** Batman. Mini's 872 is a screamer. Wet, heavy snow--rain--and even w/ the 3''. It still flat out rips. Handles the track w/ ease. Turbo would see higher track speeds on the same hill, but 872 got to it's peak faster. Was seeing mid 60's and still gaining w/ the turbo, but I bet there wasn't 5 mph difference in actual ground speed. Turbo beat 872 once. We raced half a dozen times. W/ the 3'' track, I don't think turbo would have beat the 872 if the snow would have been more powder. No more pull and go for the turbo this year, going to have to dial in the clutching to get ahead of 872. Power alone is not doing it. Hill we were running on was about 8200' and 1/4 long.
Similar threads
