I want to run a blower on my Camaro .
This is a race car. I don't want to add just 50hp. That is a waste of my time.

Current Motor:
Block is an ZZ4, full roller
Heads TrickFlow 160cc 2.02 190's
Air Gap intake
Holley 750 Double
Not sure on the cam... only thing I have not changed.
It is not very large. 1.6 roller rockers
150 Shot of Nitrous, wet
I have a digital wideband o2 sensor
Should be 10:1 compression.


so... I know a blower motor is typically 8:1. Why?
That is not true with a procharger or a super charger.

I do not want to build an 8:1 motor. That is a useless motor
if you take the blower off.

Can I keep the Nitrous?

Car sees the track once a year.
Sees the street once ever few months.
I do not really drive this car. Someday I would like to race it more
but as of now the track is to far away.

Without the nitrous:
Current rear wheel hp is 318 at 4700 rpm. tq is 356 at 3600 rpms.

I want the car to run like the nitrous is on when it is not.
Hence the blower.

I have thought a lot about the procharger.... but I think I want the
blower on this car. I like the idea if it sticking up trough the hood.
I do not want to build a new motor for a blower. If I build a new
motor it will be fully forged and running a 250 shot of nitrous.

Thanks for your advice...

 

10:1 is your static compression ratio. A blower boosts that to a higher final c.r.
Find out the boost output of the blower you want, then look at the chart in the link below. As an example, if the blower is putting out a meager 4 lbs. of boost, your final c.r. is 12.7:1. You'll want to be using premium pump gas with octane boost added. Blowers can be under-driven more by changing the pulleys, but because of the characteristics of a blower, doing that makes your low rpm performance suffer. And then there's the question of how strong is the lower end of the engine built to handle the added stress? http://www.blowerdriveservice.com/techcharts.php

 

The engine is strong enough to hold it for a while.
If it goes, it goes. I want to build a 383 from hell. But cant justify that till this one dies.

Will read that info in that link now.

There is no reason to wast the money on a blower and only run 4lb of boost.

What is wrong with 14:1 at 6lb of boost.
Just means I run race fuel or E85.

I am really interested in the idea of running E85 at 14:1.
What would the negative be?

 

E-85 may be a good alternative, given the numbers. That's not going to change how much stress the engine can handle, but it will allow you to run a higher c.r. without pre-detonation (compared to gas) which can do damage in it's own way. The negative would be worse gas mileage, which you're probably as concerned about that as I am! You also need to plumb and tune the carb richer for E-85.

 

I don't see the 6lb of boost being much harder on the engine then 150 shot of nitrous.
Carb will have to be re-tuned for the blower anyway, I can change the jets in a few minutes. Already carry a full jet kit.

I called BDS... they said I would be totally fine running E85 since it is 105 octane.

Of course that does not account for the strength of the engine, but who knows about that.
If I snap a crank or break a rod I will just rebuild it with better parts.
I run that risk every time I go to the track.

This is a race engine, I don't expect it to last for 100k miles or even 40k.
I am fine replacing the motor when I kill it. I am just not fine buying a new motor
and letting this one rot in the garage. Neither is my wife. If I blow it she will be fine
with me rebuilding it bigger and better.

As for gas mileage I get about 6 miles to the gallon. I don't care if that is only 3.
I do not drive this car to work, or to walmart. This is a racecar.
That is all I want it for. If I want a nice driver and good gas millage I drive my corvette.


My primary concern is will it run?
How much hp gain. $3500 for an extra 50 hp is not the way to go.
but $3500 for an extra 150 hp sounds like a plan.

I can buy a fully forged 383 for $3500 but I think that engine would
only gain me another 50 or so hp. And I want the look of the blower.
I am tired of having 350hp I want 500 to 600hp. Im thinking start with the blower
then when I kill the motor put the blower on the fully forged 383.

I don't understand what is better.
12 lb of boost on a base 8:1 ratio ending at 14.5:1
or
6lb of boost on a base 10:1 ratio ending at 14:1

which will make more hp?

What will the blower do to my low end torque?
I figure I can get a cam that will keep the low end torque.

One more part... I live at 4500 feet. According to that link you gave me
that will actually lower my compression ratio a full 1 point. So here
I only have a compression of 9:1

 

A shot of nitrous will boost the same amount as a blower, but a shot of nitrous comes on whenever you trigger it, and goes off when you release the trigger. A blower is there all the time, even when you're just cruising along you're making higher compression ratio.
You can make a pretty healthy 8.5:1 cr motor that will run on 6 lbs. boost, but that motor wont be a long term motor either. Lots of drag racers running blowers at 14:1 cr too, but they run 1/4 mile at a time, not cruising around town for extended time. They also rebuild or refresh their engines every year, and still occasionally lose one.
If you lose a motor that's running 14:1 cr it wont be a case of rebbuilding it better the next time. There wont be a next time, as motors with that kind of cr will totally self destruct when they blow and rods/cranks will be thrashing around inside with nothing left to reassemble. If you're lucky the blower wont pop off the top and end up as junk too, and maybe you can save it, or possibly the heads if the pistons and valves don't try to take up the same space.
Guys I know who run blowers on the street almost all run 8:1 or 8.5:1 cr and then still don't boost much more than 2-4% over that. The motors can run on premium pump gas, and live longer. Guys who run E85 on their blower motors for the street will boost them higher at 6%, but still start with the same lower cr to make them live longer.

 

bummer....

Thanks for the advice.

I have nitrous, but I want power all the time.
not just when the bottle is on

 

I think its easy to get addicted to power. Do you have an intercooler? Cheap viagra online

 

Im not sure i am following what everyone on here is writing. If you throw a procharger on that engine that makes 400hp (engine) now you should make another 50-60% power, if you ask a procharger rep about your pistons hes gonna tell you that you can run 6psi at 10:1 compression ratio without an intercooler and 8psi at 10:1 compression with an intercooler. You are going to have massive power with 8psi of boost.

As for a blower, i have no idea as i have never looked into it.

One cool thing about a procharger setup is the blow off valve that you can get. I have a buddy that just sold a procharged mustang and it sounded killer.