Power Adders Getting a Supercharger or Turbocharger? Thinking about using Nitrous? All forced induction and N2O topics discussed here.

what power adder is right for me?

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Old 12-28-2000 | 07:46 PM
  #1  
mikeage2's Avatar
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From: rockford,il,usa
what power adder is right for me?

I have a 83 z with a 3:08 posi,350 trans,and 350 motor.It is a early 70's 350.It is bored .040 over,192 heads,polished rods,decked block,milder cam.it has a 600 holley with a dual plane highrise,with a re-curved hei distrubitor with accel coil and msd wires....h.o.manifolds_crossover with dynomax exhasust.WHat is right for me?notrous or a blower...my compression is about 9+1/2 to 1...thanks for the input!!
mike

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83 berlinetta:well,now its a 87 z-28,but insurance dosent have to know that.
350 .040 over.line bored.deck milled.020
trw forged pistons with summit stage 2 rods
190 something intake valves,old vette intake with 750 holley(junk)

ase certified for two years,learned alot though

working on freakin neons ,cirruses,tauruses,and intrepids all day makes me drink too much
Old 12-28-2000 | 08:04 PM
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Dan W's Avatar
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From: Brevard Florida
Depends on what are you looking for?

How much power are you looking for?
In what RPM range?
Do you want it to fit under the stock hood?
Do you like the roots style blower look?
Do you mind the initial cost of a blower / Supercharger?
Do you mind having to fill up a bottle?
Old 12-28-2000 | 11:08 PM
  #3  
mikeage2's Avatar
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From: rockford,il,usa
i want all the ***** i can get!lol
in mid-high rpm(stil must idle with stock 350 trans converter)
filing up a bottle depends on how much it costs
i would like to find a used blower so it dosent cost as much
i dont care if it fits underhood the hood dosent fit now lol


------------------
83 berlinetta:well,now its a 87 z-28,but insurance dosent have to know that.
350 .040 over.line bored.deck milled.020
trw forged pistons with summit stage 2 rods
190 something intake valves,old vette intake with 750 holley(junk)

ase certified for two years,learned alot though

working on freakin neons ,cirruses,tauruses,and intrepids all day makes me drink too much
Old 12-29-2000 | 05:00 PM
  #4  
Dan W's Avatar
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Joined: Jul 1999
Posts: 686
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From: Brevard Florida
Sounds like cost is an issue. I'll list the options in order of cheepest to most expensive.

NOS plate system, low initial cost($5-700) In a magazine test of different HP shots of NOS on TRW pistons, they had a piston failure at something like 150 or 175 hp. Keep it safe and run under a 125 hp shot. Call a local suplier to find out how much it costs to fill a bottle. I havent had personal experiance with NOS so ask some other people how many runs you can get out of a bottle.
* Low initial cost
* Easy install (plate system)
* Great power
* Bottle refills

Roots style Blower 144 - 172 cid from holley or weiand... $1500 - $2000 new. More power everywhere, add 25-40% power. I installed one of these systems from B&M (long before holley bought them out) on a stock '88 TBI Truck. The results were nothing less than impressive.
* Instantanious torque
* Good value
* Most difficult install
* Wont clear stock hood
* boost probably limited to 5-7 psi

ATI Procharger... in the 9 lb range. (about $2000 new when I looked into it a couple of years ago) Does not change your current drivability characteristics. Power begins to smoothly come on in the 2500-3000 range and continues to increase until redline.
I just helped a buddy with an ATI installon his '95 Mustang cobra (supercharger model p600B), the car was advertised from the factory at 240 HP. The only other mod was headers and a full off road dual 2 1/2" exhaust system. It made 10 psi and 360 rear wheel hp at 6000 rpm on the dyno (and it was still climbing). The power comes on so smooth its deceptivly fast.
* Big peak power
* Unchanged drivability
* non intercooled system is an easy install
* May require a specific carb
* Highest initial cost
* Very loud

Your current drive train will work but of course any power adder will be harder on your drive train. I'd steer clear of slicks.

Now as far as what choice is best for you I cant say... but personally, I dont like the Idea of having to fill the bottle. That leaves roots or centrifugal... My personal preference would be for the roots on a vehicle that could accomidate it under the hood (like that truck did). Since it wont fit under the stock hood of a f-body, I'd have to go with the procharger.

Old 12-29-2000 | 10:51 PM
  #5  
mikeage2's Avatar
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Joined: Feb 2000
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From: rockford,il,usa
Yes i really would love to get a big procharger..like i say the hood dosent fit now,if i gotta change a carb or cam so what...i just hate the fact i gotta spend more on it than my whole motor+car lol
anyone have a nice used one out there??
thanks,
mike

------------------
83 berlinetta:well,now its a 87 z-28,but insurance dosent have to know that.
350 .040 over.line bored.deck milled.020
trw forged pistons with summit stage 2 rods
190 something intake valves,old vette intake with 750 holley(junk)

ase certified for two years,learned alot though

working on freakin neons ,cirruses,tauruses,and intrepids all day makes me drink too much
Old 01-01-2001 | 07:19 AM
  #6  
Novaguy76's Avatar
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Joined: Nov 2000
Posts: 158
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From: Garland, Tx. 75044
Well I am a nitrous person and would not trade it for anything. if you have a cast piston motor (which I have had many with nitrous) you can use up to a 150hp shot with no problems. I have run a 125hp shot on a couple of cast piston motors with the fuel silinoid disconected and never had a problem. So it is safe to say that you can not hurt you r motor with a 125hp shot of nitrous. The bottle issue is with this small of a shot the bottle will last you a good while, somewhere in the area of 10 1/4mile pass's and it is usually around $35 to refill the bottle. Other pro's to having it is it is not putting a strain on your motor all the time like a blower does and will have no effect on drivability from what you have now. The gains you will see with a 125hp shot of nitrous will be a little more than a second in your 1/4 mile time. I just noticed you said you have TRW pistons (I am assumeing that they are the forged versions) if they are then you can put up to a 350 shot on it and see some mind numbing gains...(and find every weak part in your drive train at the same time). To put this much nitrous through your motor you would have to do alot more with the fuel system so I would not recomend that. A 200hp to 250hp shot on a set of TRW forged pistons is a good safe place to start. here you can still get away with using you'r stock fuel pump but it is recomended to get an after market electric pump to handle the extra fule needs of the nitrous system. With this much nitrous on a motor like yours it is not uncommon to see a 2 second gain in 1/4 mile time (we have gone from 15.0's to 12.1's with a 250 shot on a 78 chavy truck and from 13.7's to a spining 12.2 in a 78 Pontiac Grand Am with a Pontiac 400 in it on a 200 shot). The draw back to this big of a shot is the bottle will only last you about 4 to 5 good 1/4 mile pass's. This is why most guys with nitrous cars carey more than one bottle with them when they are out on the hunt...lol. That is the lowdown on the nitrous situation srom a nitrous guys perspective. Not to mention that you can pick up a good used system at a swap meet for $200 or less and install it that day is always nice.

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82 Z28 with 350.motor has .030 forged flat top pistions other wise stock bottom end, Summit 214/224 cam with 1.6 Harland Sharp roller rockers, stock 882 heads for now (will be getting a set of the 23 degree Trick Flows this summer), Performer RPM intake, Holley 750 Vacuum secondary, Th350 with 2200 converter, stock 3.23 geared rearend for now (getting 9" later on), Headman shorty headers, custom 2.5" into 3.5" Y pipe into M.A.C. offroad pipe and M.A.C. cat back system. So far car has only been to the track twice and is having sever traction problems but is running 60'-2.34 1/8 mile-9.2 @ 79 MPH.
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