Big bore VS Small bore

Damn good job everybody!

I think everyones answer was correct! I would of went for spin it faster, but hard with cams and head the same. Maybe a good way to even up, displacement differances.

Larry is there a way to do the math for, lets say, pro stock motors running at the same speed.

1015cc @ 10,500 rpms (peak power)
1200cc @ 10,500 rpms (peak power)

Larry was the 113% Ve, ever possible?

kzz1p wrote:

Damn good job everybody!

I think everyones answer was correct! I would of went for spin it faster, but hard with cams and head the same. Maybe a good way to even up, displacement differances.

Larry is there a way to do the math for, lets say, pro stock motors running at the same speed.

1015cc @ 10,500 rpms (peak power)
1200cc @ 10,500 rpms (peak power)

Larry was the 113% Ve, ever possible?

All i/c motors....To increase power output....

1. make it bigger
2. spin it faster
3. make it more efficient

Yes, 113% is realistic on a tuned Z.

How big it is, drives the reasoning behind the choices when you want to spin it faster.

you guys are making my head hurt with all these formulas,i like the ice cream bucket approach myself! :laugh:

just remember where your streetbike motor spends 90% of its time,ill guarantee its not gonna be 8500,id say closer to 6000 so build that bigbore stump puller ! :laugh:

PLUMMEN wrote:

id say closer to 6000

90% spent between 3000 - 6000 on the street

davel wrote:

PLUMMEN wrote:

id say closer to 6000

90% spent between 3000 - 6000 on the street

exactly so build accordingly.38 flatslides and 435 cams with large by huge intake ports are cool on a dragbike with throttle pinned for 9 seconds but are of very little use on a streetbike

Carb and cam it for how you ride it.....or ride it for how it's cammed and carbed...

larrycavan wrote:

Carb and cam it for how you ride it.....or ride it for how it's cammed and carbed...

Now thats a good line!

its hard to drive a spike with a tack hammer...
i weigh 240#...so bigger is better...I agree with you plummen on the 1197 motor...

im right at 200lb myself between 5'10 and 6'4 depending on what convenience store im leaving by the time id put on some boots and a helmet and a leather jacket to make a pass down the track id be at 220 so bigger wouldnt hurt my chances either! :laugh:

1200cc KZ motors are good all around setup for everyone. Only drawback is it bites the budget a little harder.

If you look at the OEM engineer's setups, 2 things clearly dominate.

In all cc limited bikes, RPM is climbing all the time.

In bikes where cc limits are not a concern....they're getting bigger all the time.

Remember the days when guys would debate 340 vs 440 mopars

Both were a joy to own. The question was are you more comfortable in a GTX or a Cuda? :laugh:

My money is on the gtx with the tunnel rams and water injection. Almost my first car but my mother wouldn't let me because the car didn't have a hood. I told her that I could pick one up no problem. She didn't buy and as a result this may have saved my life. Being a 16 year old at the time probably was not a good combination. That car flew. Oh but the Cuda???!! I don't honestly know if I coulda made a good decision. I loved both. I probably woulda gone for the Cuda only because it looks drop dead sexy.:blush:
larrycavan wrote:

1200cc KZ motors are good all around setup for everyone. Only drawback is it bites the budget a little harder.

If you look at the OEM engineer's setups, 2 things clearly dominate.

In all cc limited bikes, RPM is climbing all the time.

In bikes where cc limits are not a concern....they're getting bigger all the time.

Remember the days when guys would debate 340 vs 440 mopars

Both were a joy to own. The question was are you more comfortable in a GTX or a Cuda? :laugh: