Originally Posted by Tig
Originally Posted by boatracer572
all great comments above... this is a common occurrence in my world (boat drag racing) the first problem i see with your combo is the staggered jetting ,that in its self will cause erratic afr and rich and lean conditions. tunnel rams have equal length runners.. IE jetting should be square to start. the power valves need to be plugged as well.. i have found on 4150 style carbs turning the accelerator cams up side down works great and will save money on cams. squirter wise, i drill out the squirters with a .040" size drill to start out with,.but dont be surprised if you end up going much larger.... try this odds are your problem will be fixed worst case scenario you will need to increase the accelerator size to 50cc twocents


Yep It seems entirely feasible that all square jetting and 1 to 1 linkages are the way too go with a TR and that is the way we have it at the moment.
But... I'm soon to fit EGT's and a Racepak. It will be interesting to see if we need to treat each cylinder as individual.

I have found EGT’s to give you mixed results ,what has worked best for me has been O2 sensors and every cylinder, If you try biger squirters and Accelerater pump cams and that doesn’t work, you may need to richen up the intermediate circuit with a smaller air bleed.

Last edited by boatracer572; 09/06/21 11:43 PM.