Pettit Super Charger Owners
#2826
Banned
iTrader: (3)
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.
#2828
Banned
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.
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.
#2832
Registered
#2833
Race Steward
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.
Cheers,
Hymee.
#2834
Registered
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.
Cheers,
Hymee.
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.
#2835
Registered User
Join Date: Jun 2002
Location: Misinformation Director - Evolv Chicago
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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.
#2837
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.
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.
#2838
DEVILMAN
iTrader: (1)
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.
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.
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.
#2839
Registered
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.
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.
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?
Last edited by Rote8; 08-04-2008 at 03:52 PM.
#2840
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.
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.
#2842
Registered
iTrader: (3)
another https://www.rx8club.com/attachment.p...1&d=1217895593
HPIM0038.JPG
hope yall can see them
olddragger
HPIM0038.JPG
hope yall can see them
olddragger
Last edited by olddragger; 11-29-2009 at 09:59 PM.
#2844
Surf Hard, Drive Hard
Join Date: Feb 2007
Location: Indialantic, Florida
Posts: 7,840
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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!
I can't wait to see this result........better get mo bandwidth!
#2846
Londons Yellow Peril
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.
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.
#2849
Registered
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
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