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

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Old 12-08-2000, 02:12 AM   #1
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1986 305 TPI WANT SUPERCHARGER

Hey does anybody have or no anybody that has put a supercharger on a 1986 305 TPI and what numbers did it put up (RWHP)i can't seem to find a bolt on kit for mine????
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Old 12-08-2000, 06:31 AM   #2
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There are two choices. If you want a truly bolt-on kit, the only choice is Paxton. I gained 1.1 seconds and 10 mph. It should be noted though, that there seems to be a trend of premature failure of the compressor unit due to the antiquated ball drive system. No other manufacturer uses this system today. It is because of this system that Paxton's SN series supercharger has a redline of 38,000 rpm. Compare this with Vortech's and ATI's 65,000 rpm redline. These figures seem high, but you need to take into consideration pulley diameter and internal step-up ratio. In other words, with Paxton's supplied pulleys, 38,000 supercharger rpm occurs at 4,861 engine rpm. It is because of this inherent design (inability to rev past 38,000 rpm) that you will be limited to 1) producing ~10 psig boost with stock heads and cam or 2) ~6 psig boost with aftermarket heads and/or cam. And more importantly, if you modify your engine to rev higher, you will not be able to do so without overreving the supercharger. This is the reason why I decided to replace my Paxton with ATI.

The other alternative you have is to convert the v-belt system to the 1988 - 92 serpentine system. This is what I did on my '87 which had the v-belt system. This will allow you to go with Vortech or ATI.

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[This message has been edited by Willie (edited December 08, 2000).]
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Old 12-08-2000, 07:11 AM   #3
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I had a Paxton on mine for a while and I spu nthe bearing 3 times.
I know Willie spun his.

I converted my belt drive to serpentine as well and now I have a vortech.

If your going to supercharge, this is what I would do personally. It requires removing your AC and converting to the later style (if you even want to keep AC. I didnt), because the blower will mount right there.
Good luck

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Old 12-08-2000, 07:43 AM   #4
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Quote:
Originally posted by Guido:
I had a Paxton on mine for a while and I spun the bearing 3 times.
I know Willie spun his.
I owned my Paxton for almost three years. I spun the bearings twice, once only two months after having a high flow impeller installed by Paxton. Each time I spun the bearings, Paxton's fluid recommendation changed. That tells me that Paxton is experimenting, trying to solve their design flaw with different fluids, which is ludicrous.

Quote:
If your going to supercharge, this is what I would do personally. It requires removing your AC and converting to the later style (if you even want to keep AC. I didnt), because the blower will mount right there.
I agree with Guido in that the serpentine system is sooo much better than the v-belt system. Not only does it keep belt tension constant as the belt stretches, but it takes only five minutes to replace. How much effort is required to change the power steering belt on the v-belt system? LOTS!! If I knew how much nicer the serpentine system is, I would have converted years ago.

Converting to serpentine requires both serpentine accessory brackets, a new alternator (mounting hole "ear" is in a different position), a new water pump (reverse rotation), a new A/C compressor (different design), and new compressor lines. I believe the air pump is the same, but I did not verify this. The alternator wiring must be lengthened while the A/C compressor wiring must be shorted. Also, the A/C compressor and high pressure switch uses different connectors. Hope this helps.

Willie


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Old 12-08-2000, 11:02 AM   #5
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So my best bet is go serpentine belt first then pick a better system then whats available as is??? Thanks for the help
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Old 12-09-2000, 10:41 AM   #6
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Quote:
Originally posted by biscwgn:
So my best bet is go serpentine belt first then pick a better system then whats available as is??? Thanks for the help
I would say the answer to your question is yes. It opens up possibilities that you don't have with a v-belt system. And I think you'll like the serpentine system better too. I definitely do.

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Old 12-12-2000, 01:59 PM   #7
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I have an 86 305 TPI also. I would like to do this. Do most mechanics know how to change it from the v-belt system to the serpentine? Is there certain brands or types of items to change this over to serpentine. What Vortech supercharger will work, once this is done?

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Old 12-13-2000, 01:06 PM   #8
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Yup, I want it too. How much is it to change over to the serpentine system?

Rob

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Old 12-29-2000, 03:43 PM   #9
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I put a procharger intercooled system on my '89 Iroc. Bone stock injection and motor got me 302 horses to the rear wheels.
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Old 12-30-2000, 09:54 PM   #10
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I think there is a paxton supercharger on e-bay for your type of pulley system.goto ebay and search supercharger and hopefully you will find it
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Old 12-04-2007, 07:08 PM   #11
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Re: 1986 305 TPI WANT SUPERCHARGER

Quote:
Originally Posted by Tadder View Post
I put a procharger intercooled system on my '89 Iroc. Bone stock injection and motor got me 302 horses to the rear wheels.
do you think you can add 150shot nos with the procharger without blowing up the engine?
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Old 04-04-2008, 04:42 PM   #12
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Re: 1986 305 TPI WANT SUPERCHARGER

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I put a procharger intercooled system on my '89 Iroc. Bone stock injection and motor got me 302 horses to the rear wheels.
302!!!! and that was with a stock motor and injection. did you have any upgrades on the motor that would have helped that any. and what psi was that running. you caught my attention lol. pm me if you can id like to know a few more things.
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Old 04-07-2008, 12:20 PM   #13
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Re: 1986 305 TPI WANT SUPERCHARGER

dahm,, resurecting an eight yr old post,, cool, im actually following ******* setup myself.
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Old 04-07-2008, 12:29 PM   #14
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Re: 1986 305 TPI WANT SUPERCHARGER

It can be done. I initally started with an 87 TPI that had v-belt setups. I purchased the Vortec S/C and haven't had any problems with it. You do have to purchase alot of new equipment though.

With the vortech S/C just goto a parts store and get a new waterpump, alt, air pump, A/C compressor and new new A/C lines if so equipped and idler tensioner and serpentine belt for a 90 camaro with a 350 TPI.

you will have to order the serpentine bracketry from the dealership. I believe it was around $150 alone. It takes about 4 hours to convert over, but you will won't regret it once you do.
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Old 04-07-2008, 03:48 PM   #15
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Re: 1986 305 TPI WANT SUPERCHARGER

Sure sounds like ALOT of money for not near enough results.

~Scott
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Old 04-08-2008, 03:29 PM   #16
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Re: 1986 305 TPI WANT SUPERCHARGER

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Sure sounds like ALOT of money for not near enough results.

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or you can fine all the parts at pick and pull.
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Old 04-08-2008, 03:58 PM   #17
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Re: 1986 305 TPI WANT SUPERCHARGER

I ment the supercharger in general... Sorry to sound negitive on that but it is alot of work to set them up and tune them only to make that little power.
Some of the bigger blowers are better now...
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Old 04-09-2008, 06:45 AM   #18
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Re: 1986 305 TPI WANT SUPERCHARGER

It does has some pretty impressive results if done right. Alot of people think just becasue they buy a S/C they will drop a few seconds off their top end. They are the few that are sadely mistaken. It does take time and alot of patience. Just like the folks that throw some NOS (Spray and Play) on. The engine can only handle so much and if it hasn't been setup right. Your playing is short lived.
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Old 05-22-2008, 03:47 PM   #19
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Re: 1986 305 TPI WANT SUPERCHARGER

Can a SD TPI car run on a stock tune with a supercharger? Ive read through quite a few TPI supercharger posts and no one has mentioned anything about tuning?? Any info on this would be greatly appreciated.

Also, how much stuff needs to be changed around when installing a Vortech SC on a '92 SD 305 TPI?
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Old 05-22-2008, 05:31 PM   #20
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Re: 1986 305 TPI WANT SUPERCHARGER

I am running a ATI D-1SC on my 91 Trans Am.

I had a chip programmer develop a Prom for my set up.

I collected data using a lap top and set it to him. He made the code and I burned it to the Prom.

Took a few runs to get it right!

I am running Willie's set up on my TA.

Engine is recently rebuilt with all forged internals and Al heads.

Original 305 suffered the dreaded crank shaft breakage.

Look at old posts from Willie and Mypontiac for the history of our builds.
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Old 05-22-2008, 06:56 PM   #21
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Re: 1986 305 TPI WANT SUPERCHARGER

Interesting. This is a long shot for me, but if I got a decent job when I graduate college (2010) and I plan on keeping my car for a long time, I'd like to throw a nice little supercharger on the LB9 to keep it numbers matching engine and have it look completely stock while being able to keep up with modern sports cars. How tough is the install on one of those things?
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Old 05-22-2008, 07:25 PM   #22
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Re: 1986 305 TPI WANT SUPERCHARGER

I did mine over a 2 week Christmas Holiday.

Your gonna want to make sure you have a cam set up for the SC and a high flow fuel pump would be good too.

You will need to add gauges to monitor the fuel pressure, boost and if you have the $$ add a Real Air/Fuel ratio gauge to make sure your not running lean.

Or you could buy mine so I can get a 40 mpg car!

Hope this helps.

Sean
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Old 05-24-2008, 09:46 PM   #23
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Re: 1986 305 TPI WANT SUPERCHARGER

hey buddy lol my names sean too how much were u planning to sell urs for i just bought one for 500$ (due to the fact that im decent at talking ppl into pretty much giving things away) and allso the fact that i have a shitty paying job that just happens to get me into a drag strip for free
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Old 05-25-2008, 11:35 AM   #24
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Re: 1986 305 TPI WANT SUPERCHARGER

Hey Sean!

I did the buy cheap and rebuild thing too. Somehow after all the work and cost of materials I was over $10K by the end anyway.

Looking at just the power train, I have a new 350 all forged engine @ $9,300 plus the D-1SC at about $4,000.

So I am figuring at sale price at least $14,500. Have it posted in the classifieds now.

I'm not expecting to get many takers, but the numbers wouldn't allow a sale at any less.
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Old 05-25-2008, 01:12 PM   #25
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Re: 1986 305 TPI WANT SUPERCHARGER

hmmn 14,500... thats liek 3 years of saving up for me... lmao
----------
oh and btw i need new brakes everything else is good >.< i touched my brake line and it fell apart thats what u call in need of replacement

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Old 05-25-2008, 01:33 PM   #26
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Re: 1986 305 TPI WANT SUPERCHARGER

Been there....done that!!!!!

I'm 41 now with 4 kids so I don't think I'll be doing it again.

Have fun and remember to check everything at least twice!
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Old 05-25-2008, 03:03 PM   #27
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Re: 1986 305 TPI WANT SUPERCHARGER

im 16 right now so ive got like a year before i drive it but i cant get the cashflow in order to do everything so im just gonna fix whats broke for now............douh ive got mine jacked up right now im trying to figure out how to get all the clips off the line they arent being nice ive got four off...and im kinda stuck the pontiac firebird manual isnt helping very much either
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Old 05-25-2008, 03:46 PM   #28
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Re: 1986 305 TPI WANT SUPERCHARGER

Check the web and see if you can find a GM service manual.

Might need the specific Body Manual for some of those parts.

Lots better than a Chilton or Haynes manual.

Check Ebay.
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Old 06-03-2008, 07:46 AM   #29
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Re: 1986 305 TPI WANT SUPERCHARGER

i got the brake line off this weekend and i got the valve gaskets changed i just wish that there werent so many hoses and wires the one got anti freeze all over and some got inside where the valve gasket is i cleaned it out but i plan on changing the oil incase
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Old 06-03-2008, 09:38 AM   #30
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Re: 1986 305 TPI WANT SUPERCHARGER

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Been there....done that!!!!!

I'm 41 now with 4 kids so I don't think I'll be doing it again.

Have fun and remember to check everything at least twice!
I am 46 and I can't stop playing. I have told my wife numerous times that she will go before I get rid of my Camaro.
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Old 06-04-2008, 08:01 AM   #31
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Re: 1986 305 TPI WANT SUPERCHARGER

i work at a drag strip and i was talkin to a girl about her camaro her daddy built it she races it i was like okie wateva then the girl ran high nines and i was like O.o no words lol then i was askin if she wanted to trade cars she said no but anyway what supercharger should i get on my camaro the guy before me allready cut out the a/c so thats not a factor

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Old 07-11-2008, 01:33 AM   #32
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Re: 1986 305 TPI WANT SUPERCHARGER

I would love to see pictures of this on a 305 for reference purposes because I really want to supercharge my 305 and would like to know from someone that has the same setup what I need to do to prepare for this. And no one tell me to get a 350 because i've heard it enough and am not going to so don't. I will buy another camaro but i'm gonna make as much hp as possible with this bit by bit with my money. ANY pictures would be awesome and advice would be a huge plus.
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Old 07-11-2008, 11:06 AM   #33
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Re: 1986 305 TPI WANT SUPERCHARGER

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I would love to see pictures of this on a 305 for reference purposes because I really want to supercharge my 305 and would like to know from someone that has the same setup what I need to do to prepare for this. And no one tell me to get a 350 because i've heard it enough and am not going to so don't. I will buy another camaro but i'm gonna make as much hp as possible with this bit by bit with my money. ANY pictures would be awesome and advice would be a huge plus.
here is all the supercharged 305's you can handle, be sure to scroll thrue all of em..
http://z9.invisionfree.com/nythirdge...p?showtopic=87

willie's iroc home page is in there too somewere.
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Old 07-12-2008, 12:35 AM   #34
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Re: 1986 305 TPI WANT SUPERCHARGER

THIS IS AWESOME..... I'll be workin all summer to afford this but it'll be worth it.
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Old 07-12-2008, 10:34 AM   #35
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Re: 1986 305 TPI WANT SUPERCHARGER

Here's a link to my original post. Lots of photos too!


http://www.thirdgen.org/techboard/po...ht=brag+trying
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Old 12-11-2008, 12:56 AM   #36
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Re: 1986 305 TPI WANT SUPERCHARGER

do any of you guys that went away from the paxton have any of the parts left ? I have a good paxton I want to put on my car but I need the pipes and brackets for a TPI motor
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Old 06-28-2009, 12:36 PM   #37
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Car: 1986 iroc
Engine: 350 .060 AFR HSR XFI280
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Re: 1986 305 TPI WANT SUPERCHARGER

does anynody know the size of the belt that should be used with a paxton sn92 with the 8rib pulley?
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Old 07-13-2009, 02:57 PM   #38
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Car: 1987 Camaro IROC-Z
Engine: 305 TPI
Transmission: T5 currently
Axle/Gears: 10-bolt Moser/Richmond 2.73

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Re: 1986 305 TPI WANT SUPERCHARGER

The final word on supercharging a 305 TPI. 625 RWHP @ 15 psi boost. Converted to E85 this week, new tune up should net a gain of another 50-60 RWHP.

http://www.nationalspeedinc.com/gall...y=70&nggpage=7

http://www.nationalspeedinc.com/gall...=70&nggpage=12


Still have a smaller pulley to put on but a little worried about everything holding together with another 7-10 lbs of boost!

Zdaddy

Last edited by Zdaddy; 07-13-2009 at 04:44 PM.
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Old 07-13-2009, 02:57 PM
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