Greg Gordon wrote:Mats: Let me get this straight. A guy in OZ uses a blow through carb setup with an ancient supercharger and I have to take a lot of crap for using L-Jet?
Andrew,
A friend in DK sent me this pic of the engine compartment of the Alfetta GTV with the Rotrex supercharged TS engine.
Jes
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87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
My practical experience is with the Roots type. I have not used the Lysholm. On the 2.5 the Roots type has not caused any significant reduction in fuel economy. The 3.0 with stock injectors responds the same way, although with big injectors fuel economy sufferes a little. However this is a result of Big injectors and nearly stock L-Jet, not the supercharger.
The Lysholm fuel economy issue is based on other people's practiacal experience, not mine. I can only do one major project at a time.
Let me get this straight. A guy in OZ uses a blow through carb setup with an ancient supercharger and I have to take a lot of crap for using L-Jet?
Greg:
I was talking about "common knowledge", not your personal experience. Just trying to understand stuff.
That OZ stuff wasn't directed to me I take it.
Mats Strandberg -Scuderia Rosso- Now burned to the ground... -onemanracing.com- -Strandberg.photography-
GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
The OZ comment was supposed to be funny. I am impressed the guy got that working with carbs. A blow through carb set up is tricky, it's one of the factors that put Studebaker out of buisness.
Dave, I know, I know, I am building a killer 2.5 right now for my 85' GTV6 and after I demostrate it's huge power numbers with L-Jet I will probably go to something else.
Geez sometimes i think this site is taken a little too seriously i posted that pic because i thought how the SC was mounted might be of interest, not the fact its a second hand toyota blower thru carbs ................
Jess,I mailed Rotrex and a few agents of thiers in the uk and Ireland..No anwrs at all-they still in bussn.??The main site is up with tech data available....
French cars are shit and shit expensive to service and bloody awful and unreliable and expensive and friends don't let friends drive french cars and you wait years for parts.
Barry,
Yup, they are still in business. Probably better to call them - you are even in the same time zone (as the DK office), I think PM me if I should try get you a contact there.
Jes
87 Milano Verde - daily driver - Juliet
87 Milano 3.0 Motronic - budget race car - Roxanne
87 Milano 3.7 24v - race car
(Repeat or do as I say at your own risk - be critical)
The Centrifugal unit has two big advantages. Higher Peak horsepower which gets you bragging rights, and it's A LOT easier to bolt to the engine and connect to the air intake system.
The big drawback from the centri blowers, is not only minimal gain at low to medium revs, but also one of cost.
Vortech, and Rotrex are mega expensive compared to Eaton.
Cheaper to Turbo the engine than go Centriblower.
And thats exactly what I want to avoid - heat problems, big intercooler, lag, new exhaust system, new synthetic oil, heat shielding the bonnet and brake M/C and other rubber pipes.....and the list goes on.
I have a twin turbo car for that........ but it's too wild for the street.
So M62 Eaton is the one for me on the Twinspark engine - with a small cylindrical chargecooler (water-air) if needed (12 psi)
I'd love to see more pics of the Rotrex on the 75.....
I didn't think the Centrifugal blowers were that expensive. A brand new Eaton/Magnuson MP62 is $1200 with the built in bypass valve. Of course the expense in in fabricating all the stuff so you actually bolt it up and use it. I was looking at a Vortech in the dyno shop where we ran our 3.0 a week ago, and I thought wow this would be easy to hook up. It has plenty of mounting positions and you can put a silicone coupler right onto its intake and discharge sections. I assume the Rotrex is the same way althoug I have not seen one.
Obviously I think The Eaton (more correctly the Magnuson MP62 which is the Eaton M62 made for aftermarket applications) is the best one to go with overall for a mild to hot street application.
Just got a charger of a Toyota mr2....(brand new and free..)Now I have a project to complete.........I dont even have a car to put this into....
Andrew,bugger.......................
French cars are shit and shit expensive to service and bloody awful and unreliable and expensive and friends don't let friends drive french cars and you wait years for parts.
i posted that pic because i thought how the SC was mounted might be of interest, not the fact its a second hand toyota blower thru carbs 
