Sudden

Not yet @Richard currently running yamaha fj1100 carburettors and they are old. Experimenting with constant velocity slides for a wider torque curve. My compression is too high to be messing with these carbs much longer. Next step is to finish my new intake adapter for my 03 yamaha R6 itbs and go efi with megasquirt and the 5EFE dis coilpacks. Everything is inplace just need to weld the adapter up, and have the megasquirt wired... And swap in my fuel pump.... And run the efi fuel lines... Sigh

What Richard said. I'm running 4efe pistons and a usdm tercel oem metal headgasket and a skimmed head (2 thou) aswell... Not recommended unless running decent octane fuel.

I took the entire exhaust off my sera (4-2-1)cast header etc and installed it on my 4e. The flange where the 4-2 joins to the 2-1 touches the block by the front lower 17mm gearbox bolt. I managed to get away with cutting a notch out of the flange. Massive improvement over the giant catalytic converter from the 1st gen 4e.

Pic 2s 5efe rod next to the fhe rods is exactly how mine were when I compared them, that's why I used the dis rods

The 3e, 1st gen 5e, and fhe rods all look the same. The 5efe rods in that pic are the dis rods. Same ones im using. The width in the 2nd picture now shows how the fhe rods are skinnier than the dis rods, in my opinion where it counts the most.

Sorry double post.

This topic is highly controversial. The picture you posted is only one of a pair. The fhe rods are thicker front to rear(of the engine not the car) and thinner exhaust to intake. In my opinion, because of how the rods rotate on the crankshaft, the forces acting upon the crank would indicate that a wider rod (exhaust to intake) would withstand more strain, while a narrower rod front to rear of engine will be more "aerodynamic". Regardless, bad fuel/poor or no tuning causing detonation will destroy any rod. I recently built my engine using 5efe dis rods because i believe yamaha/toyota wouldn't step backwards in their parts design or construction. My pc is down, would be nice if you could source and post the 2nd picture to match the one you posted.

Mr. Jiggaman a pleasure to see your build is still alive. This is Sudden from wheelsJa. In time i shall unveil how far i have gotten aswell.

bout time

Could be the ecu. the younger model e series engines have more fuel saving features like lean burn mode etc. saw on another forum a guy having the same issues. larger injectors helped a bit but...I could be completely wrong because I thought the lean burn mode was on the distributorless models only but, who knows.

glad to see another ITB'd N/A keep it up. looks and sounds good