positraction

[zr1_racer]

Originally Posted by Aurora40

Of course it won't be once you improve driveline losses...

You're absolutely correct Bob.

Originally Posted by Aurora40

Have you done the math on your goal? If your 368 was putting down 450whp, that would mean it loses about 80hp in the driveline assumng 15% loss. If you cut the driveline losses in half, that would only buy you 40hp. Add in 10-20hp in accessory loss improvements and you are still a ways from the 100hp goal.

Let's say this ZR1 with standard equipment puts out 530whp that is 450rwhp.
Add:
- bosch injectors: +10 hp
- no cats: +15 hp
- no accessories but alternator: +20 hp
- vacuum pump: +10 hp
So the power getting into the gearbox is now 530+55=585hp

Now remove a quite conservative 10% (I hope, time will tell...) and you get
527 hp.

With a non optimized drivetrain, you would need 620 hp ... not far from my non effective 630 hp goal at the flywheel.

Originally Posted by Aurora40

I was just wondering if you had a map of how you get to 100hp. It sounds like a pretty cool project, though. Sorry no one so far has had any info on your Torsen question, I'd guess you'll be the first person to try it.

Thank you Bob. Informations are welcome , I have virtualy no experience with Dana 44 rear end work.

Originally Posted by Aurora40

Have you thought about shedding weight instead, or along with, of shedding driveline loss? I wonder which is actually more difficult/expensive to do? I look forward to hearing about your progress.

Yes weight and aerodynamic too (floor) but with moderate modifications.
Superfinishing of parts is not very expensive. What is demanding is time, some coatings, hybrid ceramic bearings,...

Thanks for your support Bob!

[blackjack]

im really interested to see your results,as i agree with you...there are a lot of minor improvements to be gained if one sits and think about it...underdrive pulleys...synt. oils...weight removing(excluding dieting) , etc...let us know how it goes,and good luck
bj
91/1735

[zr1_racer]

Thank you BlackJack! I will for sure keep the community informed!

David

[Locobob]

Originally Posted by zr1_racer

You're absolutely correct Bob.



Let's say this ZR1 with standard equipment puts out 530whp that is 450rwhp.
Add:
- bosch injectors: +10 hp
- no cats: +15 hp
- no accessories but alternator: +20 hp
- vacuum pump: +10 hp
So the power getting into the gearbox is now 530+55=585hp

Why do you think you'll get 10hp out of Bosch injectors? Do you have some test results / evidence of a hp gain with these? I saw a video recently that showed the Bosch design 3 spray pattern compared with other brand name injectors, it looked good in comparison but I wonder if this will actually translate into a hp improvement.

Cats: Assuming you already have headers from what I've heard you will only net about 5hp by removing high flow cats (aka Random tech 3in).

The vacuum pump is an interesting idea, I think Kurt White played with this idea some time ago and netted a small gain. I have been wanting to try this myself. My thought is to rig a small electric pump to a micro switch on the throttle body for a full throttle only activation.

[bradslt5]

on the vaccume pump . corey did his masters paper on the effects of a vaccume pump on the lt5 and said it netted no gain at all . you might double ck with him but he put alot of work into the project , being it was his final .

[kenthompson]

Originally Posted by blackjack

im really interested to see your results,as i agree with you...there are a lot of minor improvements to be gained if one sits and think about it...underdrive pulleys...synt. oils...weight removing(excluding dieting) , etc...let us know how it goes,and good luck
bj
91/1735

Double goes on the dieting. Gotta maintain our girlish figures now.