MazdaManiac

iTrader: (3)

And, as I pointed out, you are not injecting enough meth to take advantage of its native octane in any appreciable way.
You would have to pump in twice as much meth as gasoline to get the octane advantage.
You are ONLY benefiting from the AKI effect of lower AITs, which can be greater with meth than water at those ratios.
You would still be better off richening-up the lambda target.
Its cheaper, will make more power and is more controllable and precise.

olddragger

iTrader: (3)

and give much less gas milage? what lambda whould you suggest for the s.c. setup?
OD

MazdaManiac

iTrader: (3)

You care about gas mileage in boost?
So you are saying you would rather inject "x" quantity of $20 "boost juice" into a dry manifold instead of the same quantity of $5 gasoline directly into the intake ports?!?

.97 at idle, 1.0 - 1.05 at light throttle cruise, .98 at anything more than cruise in vacuum, .91 at the threshold of boost (which is a moving target based on RPM/load, so your flash tuner better know the proper airflow rates) and .79 - .83 on load/boost.

olddragger

iTrader: (3)

i like to watch the little numbers move
OD

olddragger

iTrader: (3)

I have a cool running fi rx8
OD

Hymee

iTrader: (1)

Any word on what's happening when the supply of the Autorotor's dries up?

Cheers,
Hymee.

Rote8

Huh?
I did not know they were wet.
Is there an issue with Autorotor; are they doing the American bank thing?

Hymee

iTrader: (1)

I thought that was brought up earlier. Lysholm (the "new" owners of Autorotor at the time) discontinued it <Opcon was the parent company for both Lysholm and Autorotor, with the Lysholm units being marketed in the US under the Whipple brand, and the Autorotors used by Kenne Bell>. I recall there were 5 units left in the US, or something like that. Happy to stand corrected if need be.

Cheers,
Hymee.

Rote8

Bummer, they might as well have done the bank thing....
Does this mean the end of your S/C designs?
Any thoughts on using a Lysholm?

A 12 to 14 PSI RX8 would be awesome.

Red Devil

Lysholm units are a little larger in displacement vs. the autorotor counterparts - like .1-.2 L. They also will have a little more parasitic drag and are equipped with different size bearings.

Kenne Bell claims the Autorotor has stronger bearings and was more robust. An engineer at Opcon told me the direct opposite and that Lysholm was the better unit. My .02, there's probably no appreciable difference in durability between the two.

MazdaManiac

iTrader: (3)

Other way around. It means a production change for the Pettit system.

Charles R. Hill

iTrader: (7)

I thought this potential change was mentioned a few pages back already....?
BTW, BHR has made significant progress on that new blower drive design. Once I get settled in the new crib and we release a couple new products you Pettit lovers will have a new toy to consider. If the blower in the Pettit kit changes we may help with that, too.

Bastage

iTrader: (1)

Hurry up and build it before Juan decides to build the parts himself.

That's great news; Juan, Norman, and I actually talked about this yesterday at the dyno-meet in Kissimmee. It's safe to say that we're all very interested.

I'll be posting some vids/sheets of our dyno runs tonight. They put the three of us in a class by ourselves, and Juan walked away with the prize on his last pull (I was up until the very last pull). It was a whopping 101F in the dyno shop, so the numbers are a bit disappointing (283/271/262 for the three of us). The 30+ people standing in the entryway to the shop didn't do anything to help the temps. So Juan will have to wait until cooler days to beat that 297rwhp.

Rote8

Wait a minute:
A few posts back Autorotor was the company bought by Lysholm.
How does Autorotor being discontinued mean anything to Pettit,?

Pettit uses the Lysholm blower already.
(Or mine is Lysholm at least, I checked with Cam.)

Here is the PettitRacing web page on the compressor:
http://www.pettitracing.com/rx8/index_turbo.htm

Compressor:
Pettit chose the Lysholm compressor because it is one of the most efficient twin-screw compressors on the market today. Made by the Opcon Group in Sweden, the Lysholm’s advanced design provides a reduction in parasitic loss and charge temperature, which makes it more efficient than roots or centrifugal type units.

Was the previous post wrong: maybe it's Lysholm being bought by Autorotor?
I heard the only changes in Pettit was a new casting for the blower housing due to a model being discontinued; and that change was already designed for and working.

Which company is buying what?

Charles R. Hill

iTrader: (7)

Perhaps I am confusing a couple of different issues (it's not like I have never done THAT before!) but I thought there was some design change or product change that had Pettit possibly changing blowers in future kits.

As for the pulleys; I got my unit prices from Gates, who WILL be the company who makes them, but I need to get a couple of other products rolled out so I have the start-up cap for 15-20 sets of these pulleys. Margins will be a little slimmer than what I had hoped but I really want to take care of you guys and see 300+ at the wheels.

olddragger

iTrader: (3)

my car is cool
pic for what it is worthhttps://www.rx8club.com/attachment.php?attachmentid=124534&stc=1&d=1217895 453
small radiator.jpg
od

olddragger

iTrader: (3)

another https://www.rx8club.com/attachment.p...1&d=1217895593
HPIM0038.JPG
hope yall can see them
olddragger

Rotr8

iTrader: (2)

bigger pics, bigger pics...

Mazurfer

Denny just learned to somewhat attach pics.........and now you want him to learn to resize before posting them?

I can't wait to see this result........better get mo bandwidth!

Rotr8

iTrader: (2)

I know. he needs to learn to resize the other way, bigger not smaller... he has so many DIY projects that we all need to witness

california style

As far as I know, Opcon the Swedish engineering company bought Lysholm AND Autorotor. Those 2 companies were created from one (as one employee split away to found a rival...) and their products were VERY similar, although with a lot of arguing about "mine is best".

Opcon now own both of them and are rationalising the product line, meaning the current Lysholm model Pettit use will be discontinued but replaced by a nigh on identical other model.

Pettit have already been testing the new model and it seems it will be a perfect replacement.

olddragger

iTrader: (3)

resize them? Oh Hell----HOW do ya do that!! Only took me 2 yrs to learn how to do what i did,
OD

Rotr8

iTrader: (2)

what software are you using ??? if its Photoshop I could walk you through it... you can probably download a ripped version of it if you ever wanted it...

olddragger

iTrader: (3)

go to the georgia rx8 club site under the diy thread --there is one there you can enlarge--i dont know how the hell i did it.
i just have a hp digital cam and download the pics then open them with the microsoft picture stuff and resize them. I havent ever messed with photoshop except once when trying to make my wife's hair curly(it didnt work well and she can hit pretty hard with that broom)
OD

Rotr8

iTrader: (2)

dont mean to laugh but thats funny....