Big hp turbo 1000cc Yamaha

[DC5]

Tq. will be higher at the clutch because it it geared down. Glad Ted brought it up. I didn't want to say anything but 28 lbs boost running rich and 520+ HP does not seem realistic, and I have spent a whole lot of time dynoing engines as has Ted. 420 HP would be a little more realistic. 140 stock HP + 280 of boost dialed properly = 420 HP which is still excellent. The math just did not add up.

I believe it was actually run at 32lbs of boost.

 

[87gtNOS]

319 ft lbs at 9000 clutch rpm...546hp

319 /1.1935= 267 ftlbs at the CRANK

267x 10800/5252=549

 

[ultimate]

Tq. will be higher at the clutch because it it geared down. Glad Ted brought it up. I didn't want to say anything but 28 lbs boost running rich and 520+ HP does not seem realistic, and I have spent a whole lot of time dynoing engines as has Ted. 420 HP would be a little more realistic. 140 stock HP + 280 of boost dialed properly = 420 HP which is still excellent. The math just did not add up.

well ...all depend with which turbo you run! exemple:if you run with garret 2871 at 20psi and 28rs at 20psi you will make more power with 2871!

may be he run with 3071..i don't know......its just an opinion!

but i know on my trail sled and lakeracer have this year 400hp at 26lbs of boost on dyno on apex!

PS: I KNOW ITS A HARD WORK...GREAT JOB MEN!!!!

 

[KnappAttack]

About 10 HP PER LB OF BOOST on this engine assuming its working efficiently. If its inefficient then you can push the boost higher and not make any more power. Its just a 1000cc engine. It was not designed to push 500-600 HP like the Suzuki busa engine is capable of. You have to factor in the rpm of the engine to correct the HP reading on the dyno. I made 340+ HP on my 800 v-max pro-stocker once. It had the reduction gear in it also. It made a lot of power, but I knew it didn't make that much power. Even it it was 32 Lbs of boost, 140 engine + 320 of boost power is still 460 HP. Still alot of power, but not 520+, and never 600 HP. I don't know how you could pick up that much efficiency with what is available now. It would take a much bigger engine to make that type of power. that is just not going to happen with the design of the Yamaha engine. Bore spacing is just to close and block and head is just not going to take that kind of pressure. You can only harness so much power with the clutches and belts that we have now. I see no reason to push boost that high yet.

 

[ultimate]

i know Mike but may be we don'T know all about this motor...................

and if it was only 460hp,i am happy FOR ME cause that what it mean that my sled is on touch!!!!!!!!!!!!11

 

[ultimate]

 

[87gtNOS]

About 10 HP PER LB OF BOOST on this engine assuming its working efficiently. If its inefficient then you can push the boost higher and not make any more power. Its just a 1000cc engine. It was not designed to push 500-600 HP like the Suzuki busa engine is capable of. You have to factor in the rpm of the engine to correct the HP reading on the dyno. I made 340+ HP on my 800 v-max pro-stocker once. It had the reduction gear in it also. It made a lot of power, but I knew it didn't make that much power. Even it it was 32 Lbs of boost, 140 engine + 320 of boost power is still 460 HP. Still alot of power, but not 520+, and never 600 HP. I don't know how you could pick up that much efficiency with what is available now. It would take a much bigger engine to make that type of power. that is just not going to happen with the design of the Yamaha engine. Bore spacing is just to close and block and head is just not going to take that kind of pressure. You can only harness so much power with the clutches and belts that we have now. I see no reason to push boost that high yet.

Mike, HP is made from torque. If your diesel pickup truck makes 250hp at the wheels, it will make the same HP no matter what gear you are in, but the torque will change at the wheels....no different then gear reductions on VMAX4's or RX1/APEX's.

My easiest example is this engine in this thread,, yet I used the wrong torque (319).

The dyno is measuring off the PTO, which doesn't match engine RPM. In order for the PTO to produce 319 ftlbs of torque at 9000 PTO rpms, it had to be fed 267ftlbs of torque from the CRANK at 10800rpm! Is this not true? Did the CRANK make different torque?
Then either way, HP is still the same (off a few hp in my calculation due to rounding off decimals).

My posts aren't to discredit anyone. I am just not sure how my calculations are wrong?

Cliff's dyno will read 150 hp on a stock APEX...would that be wrong?

 

[HURRICANE]

WELL PUT!!!!

 

[Need for Speed 2]

Will you guys cool it your gonna heat things up and melt away the white gold on the ground

 

[KnappAttack]

Maybe it isn't being run on gasoline? Inquiring minds want to know! Alcohol perhaps?

 

[adrenalator8]

Ok guys, seeming it was my dyno that we tested this on, I will answer the question.

It works like this, you run the engine to choosen rpm, in this case 10800rpm and the pto on the engine turns around 9000 rpm.

Now being that the clutch is on the pto shaft, and the pto shaft is what is doing all the work of moving the sled "not the crankshaft" then that is where the hp and torque should be read from.Because thats where the available power output of the engine is

Now the formula reads as.

torque divided by 5252, times RPM = HP
or
303.6 FPT divided by 5252 times 8900 PTO rpm = 514.7HP

Again this should be read from the PTO, because that is what is moving the sled or in another term supplying the power to the belt.

I hope this clears some of this up.

Cliff Yeatman
Advanced Dyno

 

[87gtNOS]

torque divided by 5252, times RPM = HP
or
303.6 FPT divided by 5252 times 8900 PTO rpm = 514.7HP

Again this should be read from the PTO, because that is what is moving the sled or in another term supplying the power to the belt.

I hope this clears some of this up.

Cliff Yeatman
Advanced Dyno

..and Cliff furthurmore...

303.6 fpt at the PTO is 254.37 fpt at the CRANK.

8900 PTO rpm is 10622 CRANK rpm

254.37 divide by 5252 X 10622 = 514 hp!!

 

[adrenalator8]

torque divided by 5252, times RPM = HP
or
303.6 FPT divided by 5252 times 8900 PTO rpm = 514.7HP

Again this should be read from the PTO, because that is what is moving the sled or in another term supplying the power to the belt.

I hope this clears some of this up.

Cliff Yeatman
Advanced Dyno

..and Cliff furthurmore...

303.6 fpt at the PTO is 254.37 fpt at the CRANK.

8900 PTO rpm is 10622 CRANK rpm

254.37 divide by 5252 X 10622 = 514 hp!!

 

[Ted Jannetty]

Ok guys, seeming it was my dyno that we tested this on, I will answer the question.

It works like this, you run the engine to choosen rpm, in this case 10800rpm and the pto on the engine turns around 9000 rpm.

Now being that the clutch is on the pto shaft, and the pto shaft is what is doing all the work of moving the sled "not the crankshaft" then that is where the hp and torque should be read from.Because thats where the available power output of the engine is

Now the formula reads as.

torque divided by 5252, times RPM = HP
or
303.6 FPT divided by 5252 times 8900 PTO rpm = 514.7HP

Again this should be read from the PTO, because that is what is moving the sled or in another term supplying the power to the belt.

I hope this clears some of this up.

Cliff Yeatman
Advanced Dyno

There is no Doubt that is the most powerful RX1 Engine that I have seen, I am not debating that, Congradulations on a job well done.

You guys are definately on the cutting edge.

For the Masses it would be better to talk in Engine/Tach RPM, so that people can get a real handle on the power and compare to what everyone else is dynoing, and where peak power is for clutching purposes.

This is a good discussion keep it going.

OOHH yeah, How much does the filter kill power???????????

Ted.

 

[Ted Jannetty]

About 10 HP PER LB OF BOOST on this engine assuming its working efficiently. If its inefficient then you can push the boost higher and not make any more power. Its just a 1000cc engine. It was not designed to push 500-600 HP like the Suzuki busa engine is capable of. You have to factor in the rpm of the engine to correct the HP reading on the dyno. I made 340+ HP on my 800 v-max pro-stocker once. It had the reduction gear in it also. It made a lot of power, but I knew it didn't make that much power. Even it it was 32 Lbs of boost, 140 engine + 320 of boost power is still 460 HP. Still alot of power, but not 520+, and never 600 HP. I don't know how you could pick up that much efficiency with what is available now. It would take a much bigger engine to make that type of power. that is just not going to happen with the design of the Yamaha engine. Bore spacing is just to close and block and head is just not going to take that kind of pressure. You can only harness so much power with the clutches and belts that we have now. I see no reason to push boost that high yet.

This might be true on a stock engine, but cylinder head porting and bigger cams cam make a dramatic difference on a boosted engine.

Each turbo has a small window of HP, if you keep putting larger and larger turbos on you will make more and more power, it is all about air flow,
55 lbs. a minute will make about 550 hp

Garrett GT3076R will do that just fine but spool up will be pretty SLOW.
Great for speed runs but not drag racing.
I run this turbo on my Kids 91 MR2 at 29 psi boost, makes about 500 crank hp or 425 rear wheel.

http://www.youtube.com/watch?v=WH_hxuKs ... car3.shtml