6.2/6.5 Dyno Data

[DaveBr]

If a stock 6.5 dyno's around 150 - 160 h.p. shouldn't a truck that has high boost, upgraded exhaust, marine injectors and IP turned up put out more than 31 - 41 more HP? These numbers sound low to me. I was thinking more along the line of 225 Hp / 440 ft lb tq. Maybe the old girl is getting a little tired. 6.5 DD when I get out your way I'll have to race you.

[6.5 Detroit Diesel]

Ya, I think it should have made more power to. But, I am starting to doubt whether I actually have a higher pop injector in the truck.
That, and the tech said the 36's soak up power nicely. And judging by seat of the pants feeling when I switched to them, he's right. I picked up a cummins intercooler while i was down there, so that is going to be getting hooked up soon.

[DaveBr]

If you come across another cummings intercooler please let me know. I was going for the DYI but I like the placement of the Cummings cooler behind the grill better. Those 36's really must turn your gear ratio's up.

[6.5 Detroit Diesel]

Dave PM me. They have one more sitting at the shop. I picked mine up for $112 with tax
As for the tires, I took them off this morning. What a difference in power. I don't even want to think what running them with something lower than 4.10's would be like.

[ronniejoe]

If a stock 6.5 dyno's around 150 - 160 h.p. shouldn't a truck that has high boost, upgraded exhaust, marine injectors and IP turned up put out more than 31 - 41 more HP? These numbers sound low to me. I was thinking more along the line of 225 Hp / 440 ft lb tq. Maybe the old girl is getting a little tired. 6.5 DD when I get out your way I'll have to race you.

It takes a lot of work to get to those numbers, which is where I was in 2004 with my truck. See the dyno data here. Plus, the 6.5 doesn't last very long there without doing work inside. Cracked piston and cracked main web followed.

I don't have new numbers yet, but the Pull-Off performance suggests that I am significantly higher now. With durability, too.

[6.5 Detroit Diesel]

ronniejoe, any idea of when you are going to be doing some pulls with your 6.5?

[ronniejoe]

Hopefully, maybe, this summer.

[Kennedy]

Rehashing an old post my question is why would parasitic losses increase as engine HP is added?

I don't buy the % of loss. I believe that the parasitic loss is a number. True you can make it a percentage, but that is a meaningless statistic.

Vendors hide behind the veil of mystery by making flywheel HP claims that cannot be measured, but sure sound more impressive...

[sctrailrider]

Rehashing an old post my question is why would parasitic losses increase as engine HP is added?

I don't buy the % of loss. I believe that the parasitic loss is a number. True you can make it a percentage, but that is a meaningless statistic.

Vendors hide behind the veil of mystery by making flywheel HP claims that cannot be measured, but sure sound more impressive...

I agree with you John, It is just a number that people use.... I think the only way a person could come up with a "real or close" number would be to have a motor dyno'd on a motor dyno and then dyno the truck after installing the motor, then you could have a close number for that truck I think.... I know that dyno's very from one to another, and the numbers need to be looked at with that in mind....