[luc l]

I HAVE A 1993 THUNDER CAT WITH A BIG BORE KIT ITS A  1005 CC WITH PSI PIPES, V FORCE REEDS I OWN A LAND AND SEA DYNO AND I PULL OUT 193 HORSE AND A 121 FOOT POUNDS OF TORQUE. NOW I WANT TO INSTALE 44 MM CARBS ON THIS MOTOR. I NEED CARB SPECS WHAT SLIDE CUT AWAY,WHAT NEEDLE JET AND WHAT JET NEEDLE AND WHAT TO START WITH THE MAIN JET!

 

[toydoc]

44 round slides Mics? The last dyno run I read showed your engine setup made more power and ran a better ET with your stock carbs bored to 39.2mm with Vforce, and not the 44mm.

94 Tcat 1000cc / V force / PSI pipes /  
44mm carbs
RPM  / CBT / CBHP /
6500 / 104.5 / 129.3
7000 / 111.7 / 148.9
7500 / 118 / 168.5
8000 / 128 / 195
8500 / 126 / 203.9

same sled with 39.2mm
6500 / 106.1 / 131.3
7000 / 113.4 / 151.1
7500 / 121.1 / 172.9
8000 / 130.2 / 198.3
8500 / 126.6 / 204.9

 

[Limskii]

toydoc, lucl is a buddy of mine and yes it is 44mm roundslides Mikunis that he wants to install. His 38mm carbs are already bored to 39.9mm. Are those dyno runs that you have done? The question I have is how do all the dyno runs on Land & Sea dynos get such high numbers? Do they all jet lean, feed cool fresh air to carbs, run an external cooling system to regulate coolant temps, and then warm pipes up? I know lucl also has a stock 2000 T-Cat and in a heated garage with the stock jetting, he can only get one cold run and get 171h.p., then all other runs (hot engine, pipes and stock jetting) drop down to 151h.p.. On my '97 Mach 1 (trail ported, head shaved, V-Force II's, stock pipes and B&B muffler, with trail safe jetting to -25c) with outside temp at 0C, I could only get 135 h.p. and 85ft.-lbs. torque with the pipes hot and motor hot. This seems low to me but I am pulling more weight and steeper helix than stock Mach Z's. Also, lucl's modded '93 T-Cat pulls that 193h.p. in the heated garage run after run with a hot motor and pipes. Any explanations would help.

 

[machz69]

well hello luky....lol. welcome to the swf. when r we going out to do some radar or drags?   luc if i remember right the 44mm should be around 7dj2 or a 7dh2 and a bb0 or bb5 with a 3.0cut out slide.       luc on your dyno do u have to correct the hp rating? cause i know on my buddies dyno he had we always had to multiply by a factor to get the corrected hp. and that is the same dyno it might even be the same one  from central marine.