Hiya guys,
Could one run a blower with nitrous on a Pontiac 400 and still be able to drive it? WHat would the compression have to be?
Also, a while back there was a movie with a GTO in it that could disengage his blower, and re-engage it, all from within the Car. Can this be done in real life?

 

Mad max also had a blower he could disengage... I'd think it would become a parasitic loss of Hp if it is disengaged, but I'm sure it is possible and could save you gas.

 

yeah thats mad max, you cant turn off the blower, the car wouldnt run yes you can run a blower and NOS on the engine, but it is very $$$$$ your compression would need to be in the 7:1 to 7.5:1 area to run both, a pair of 6H heads would be a good choice, they are a 74-76 455 head and people pretty much just give them away as there low compression heads, but have factory 2.11 1.77 valves guide plates and screw in studs so they flow good and are strong but also you can get cheap and get the compression low.

 

Moving to Forced section.

 

Hello
i use a vortech blower and nos and have thought
about making my blower turn on and off by using
a large ac clutch.i have ran my blower with out the
belt which is like running it off it ran fine but there
was a big diffrance in power becouse i ran it through the
blower and i was not sure of the cfm loss compaird to just
running a filter but it felt ok just felt like my old 305 days.

you can see my simple site at:
http://darcom.home.texas.net/

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388 SuperRam, DFI, Vortech R trim ,N.O.S.,alki injection,
Dart sportmansII heads,50 pound injectors, Headman full headers
duel 3' exhaust,and Flowmasters, Ford nine inch with 370's
Ronal rims with Nitto drad raidals.

 

well i have a 500 hp 406 TPI and was thinking of doing the same thing. as far as i know.. if u run a s/c w/ IC at 8-10 psi u can only do a 50 shot of nos. then again.. that for my 406.. which has 10.39:1 comp. where as if u made a lower comp blower u may be able to do a 75 or 100 shot. u just have to remember, a s/c is already making your comp just WAY up.. and now u want to force another 75+ hp into it.. so unless u dont care about this motor.. do what u want. but i would recommend *safely* a ati procharger w/ IC at 8 psi with 50 shot.

 

So far no one has devised a clutch mechanism that would not slip, create additional drag, or add too much weight.

Yes, you can run both boost and nitrous together.
I do on a 355 CID sbC and have been for quite some time. I'm running just bairly under 9:1 compression but there is a lot more to the equation than just compression versus boost versus amount of nitrous.

The real bottom line is BMEP (brake mean effective pressure). This is the pressure pushing on the piston that is directly responsible for the horsepower that any engine makes.
On your average performance gasoline engine a BMEP of around 300 is as high as you usually can go without risking damage (from extreme heat, detonation, or mechanical stress). That number is on an extremely well prepaired/built engine. You can go more but you are running the edge. There are of course exceptions though.
a steady flow of nitrous increases BMEP most at the lowest RPM that it is engaged and it (the nitrous induced increase in BMEP) decreases as RPM increases. This means that the maximum amout of nitrous that can safely used on any given engine can be increased if it is engaged at a higher RPM, or is increased in steps as RPM increases.


Amaizing amounts of power can be made this way though.
Unlimited hydroplane racing boats use turbos(or blowers) with nitrous, and water injection to make huge horsepower.

Power adder/HP addicts might be interested in this link to info on the Miss Budweiser engine combo. Twin turbos + nitrous + water injection = crazypower. DROOL
http://www.unlimitedexcitement.com/G...n%20Engine.htm


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Tracy /AKA IROCKZ4me
'86 IROC-Z Camaro
"Cogito ergo zoom"

• 355 cid
• AFR heads
• Arizona Speed & Marine hydraulic roller cam w/ AFR hydra-rev kit
• modified SLP runners
• TRW forged pistons/ceramic coated
• fully balanced
• Edelbrock headers/ceramic coated
• SLP cat-back
• Paxton supercharger
• Nitrous Express nitrous oxide

EFI Performance Club on Yahoo

[This message has been edited by IROCKZ4me (edited November 22, 2001).]

 

as much as I would rather not look towards a jap car for a technical answer, the 80's version of the mr2 did use a clutch to operate there supercharger, the clutch would engage at 3/4 throttle or so. I'm not sure about all of this a friend of mine had a mr2 and told me all about it, he said it did this cause the car was to slow on take off with the strain of the charger.

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neko
'87 trans am
car in the making