valin
Active member
Just threw together my Hauck 780 and had it out on the lake today. It's running about the same as it did last year with my ported cylinders. Stock pipes, carbs, reeds. I'm running 152, 152, 153 for jetting, 1 up on the pilot. I was reading that Hauck recommends 155's.
Compression is roughly 135-137 across the board (2 base gaskets, which is what i was told to run from the guy i purchased it from). It's about 10 lbs higher with the single gasket. What should it be with these cylinders?
It should be over-revving with the clutching i have it in (same clutching as with the ported motor), but still pulling 8500-8600, so it's not building power.
Cam is a 51/37, stock springs, 1 gram heavier on the tip of the weights.
It's running a bit less than 1100 degrees on the probes (they say melt down is 1250), but i can't really use that as an example yet since i just installed them. Haven't checked the wash, but plugs look good.
Compression is roughly 135-137 across the board (2 base gaskets, which is what i was told to run from the guy i purchased it from). It's about 10 lbs higher with the single gasket. What should it be with these cylinders?
It should be over-revving with the clutching i have it in (same clutching as with the ported motor), but still pulling 8500-8600, so it's not building power.
Cam is a 51/37, stock springs, 1 gram heavier on the tip of the weights.
It's running a bit less than 1100 degrees on the probes (they say melt down is 1250), but i can't really use that as an example yet since i just installed them. Haven't checked the wash, but plugs look good.
go with the 155's and see what your egt's say... You want to get as close to 1250 as possible without going over!!!!!! 1225 is just about where you should be. Remember its 1225 @ 100+mph with the throttle wide open.... I don't like the 2 base gaskets theory because I think it works better with more compression than 135.. My srx was around 165 (race sled 1/4 mile asphalt drags) The bigger jets will actually cool down the temps if they are too much fuel. It seems to me like you aren't getting enough fuel with the 152 jets... if the 155's bring you closer to 1225, than you know youre going in the right direction.... Reading plugs isn't as good of an idea as EGT's!!! Remember, you are starting from a dead stop, getting up to speed, and then slowing down.. if you put in a fresh set of plugs, bring it up to speed, hold it there for about 30 seconds, and THEN hit the kill switch and coast to a stop, Reading your plugs would be more accurate!!!! I LOVE the guys that trail ride all day long and then pull their plugs and look to read them.... YOUVE BEEN TRAIL RIDING ALL DAY!!!!!!! DO YOU SEE SOMETHING WRONG WITH THAT??? Main jets(at full flow) are for WIDE OPEN THROTTLE!!!! there are other circuits that dictate fuel during the acceleration and deceleration (metering rods in the middle of the mains, restricting fuel flow)... You can't read plugs at 40%throttle???????????? Why would you want to!!!! As far as clutching,, I KNOW NOTHING about clutching, so I won't even comment on that (like other people do) Hope that helps!!! Gary Oles nosboy
personally. I think HAUCK is an idiot and he screws people!!!! (i had a real bad experience with his company) so i won't promote his stuff!!!! People think that they can just throw his stuff on their sled and it should run fine!!!! It doesn't work like that... You have to keep on it and keep tweaking things to get it closer and closer... Theres NEVER "get it right" with anything high performance!!!! Theres just too many variables between monday and friday!!!! (IE temp,humidity, air density, altitude,ATTITUDE, and sometimes a strong tail wind) Gary Oles nosboy
what octane fuel do you use and is it cut with alcohol??????
Srxspec
Your #1 performance shop!
Talk to Mrviper700 on here, has alot of insight in these motors and should be able to help you out!
98+01srx
New member
Pat Hauck is a genius!! He just doesnt like to tell people how to set there stuff up. He wants them to figure it out for them selves. The only thing wrong with them is they are high priced, but quality comes at cost. It took me a long time to dial my sled in, and i don't like to tell anybody what parts i put in it.
jast keep addinf weight just so it drops under 8500.My buddy dosen't have a hauck but a cpr and he was revving about 8600 and I bet I threw in about 7 grams of weight just to get it to come down to 8400.
I think a con artist. MAYBE some of his wrenches are pretty good,,,but a GENIUS???????? NO WAY JOSE!!!!!98+01srx said:
Should be running at 8100 . jetting is on lean side .finish angle on rear is to shallow.
As far as running two base gaskets sounds like no port work done to cylinders.
As far as running two base gaskets sounds like no port work done to cylinders.
cacsrx1
New member
My CRP likes 8400-8600. 