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sick of that style comment, if turbo is for road car, dont lower compression too much and properly size your turbo and it'll be fine, stop thinking about drag cars (but dont turn this into a super v. turbo thread now please)

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wow!, those airflows seem huge, with a 13:1 air/fuel ratio you are talking about 410 L/min of fuel, so the fuel tank lasts 20secs???, maybe im missing a point here but i cant see it yet?

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what does the fuel do while its sitting in the air in this pressure chamber (suck through setup)???, i here of this setup a lot but wonder if the fuel is seperating from the air in the "chamber"?

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is it ok to have water (only a fine mist) going through the super?, and what about exhaust, i heard you have to use a stainless exhuast with water injction as it tends to cause rapid rusting of the exhaust?

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sounds like an awesome budget option, anyone got one handy?, and what compression ratio would be expected, id like to drop my compression just a little bit, to reduce stresses on boost basically

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whats a ruff price on a shim of whatever thickness?, do you use normal gaskets with this or some sort of sealant to stop leaks?



thanks guys, this is a great topic, and theres some great info in here, just raising a few questions i have

oh yeah, and in all that i forgot to say what i wanted to say!

there is an awesome site for getting info on some things, i was reading about water sprays and water injection the other day, they even tell you how to set it up cheaply and all the theory behind it, very interesting reading, theres also heaps of other stuff on there

anyway ill let you have a search in it to find what ou want

AUTOSPEED

use the search tool, you have to register and pay for some articles (but mainly things like new car reviews), a lot of it is free and very very good

The shims arent very dear , mine was thrown in when when I had my vale seats recut and bronze valve guides installed.
You glue the shim to the block with an aresol gasket stuff aplied to the shim and block deck . then use a std head gasket between the shim and head. Im 99% sure that the shim was made by ACL . I was gonna use two gaskets to lower the comp but the head dr said they would blow
(cylinder head specialist, not shrink)
:-

In drag racing, would turbo lag impose a problem? There is no letting up on the throttle, so I don't see that it would be a factor.

In any case, turbos will always make more power than blowers. They only use blowers because of tradition and class rules -- and because they are cool!

hey 1200rallycar, how's things? good questions dude. for the water injection set-up on my s/c a14, i searched for info on the placement of where the water was to be injected. loads of different opinions with varying results. i didn't have time to do any testing of different locations but everything i read and everone i spoke to said that water going into the s/c wouldn't bother it.
the replacement cost of a s/c impellers (or a new s/c) is a helluva lot cheaper than replacing pistons...

hope this helps

at the risk of reigniting the turbo blower
"war" here goes.

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DDgonzal, tell me please how many turbo
motors produce 5000 horsepower??????

Answer NIL...ZIP....NADA....NONE


Im not dissing turbos, just you statement was untrue and perhaps not too well thought out.

I dont want this to be like the other thread
that was "us vs them"(even though I was regestered then) I would like to conclude by
saying that both have their merits and downsides, but whichever you may choose,

ALL POWER TO YOU
and
Keep on charging it (your way)

Like I said, 5000 hp Top Fuel engines use blowers because of class rules, not because they are 'better' than turbos. They aren't allowed to use turbos.

But this topic is about Superchargers, not turbo-superchargers. I only pointed out that superchargers don't have turbo lag, which seems in keeping with the topic (superchargers).

Personally? I would rather have a blower car than a turbo car. Go the supercharged a14!

just to change the topic back to supers

go a blow through super a14!!!

i reckon it'll romp on a suck through, (think intercooler), and if running 7psi boost you wouldnt need to even box the carby

Two identical engines should produce identical power outputs at the same boost whether blown or turbo'd. The diference of course is that the blower soaks up some of this power in driving it.

The compensation for this is the extremely good torque output at almost any engine speed [I'm talking positive displacement types here]
The turbo, on the other hand, it touted as being able to produce more power at the flywheel at a given boost. The alleged cost to achieve this is the absence of the lower speed torque, & the delay, or lag, however short, that blowers just don't have.

The trick is to know what type of performance characteristics suit your style of driving, & equip your car accordingly. I have driven both systems, & the blown engines really lit my fire, & while turbo stuff was nice, it just lacked the stump pulling performance [that i really like], of the blown engines.
My god, that 426 Dodge Hemi would drag the Queen Mary ashore, & not stop till it was 5 miles inland.

Both perform well, so just pay your money, & enjoy the ride.

Just remeber you talk horsepower but drive torque. I'd much rather the S/C and I thand everyone that's contributed to this great thread I've learned alot and it's also got me thinking about another project!