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#1050004 - 04/16/17 02:52 AM Redoing my 305sbc for my 1984 ss Monte Carlo  
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Griffin84ss Offline
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Georgetown ky
I've read a thread from here that talks about doing away with the computer in my 84ss Monte Carlo cause I'm changing just about everything on the top end of my L69 engine with brand new edlebrock carburetor edlebrock performer intake, jeg's hei distributor, and comp cam and lifters, hooker headers, comp cam double roller timing chain, and new ac Delco plugs with Jeff's performance wire's with all this going on and in this engine do I need to do away with the computer? I'm kinda new at this so any advice or help will be most appreciated. Thanks in advance.!!

Last edited by Griffin84ss; 04/16/17 03:20 AM. Reason: Words being together
#1050012 - 04/16/17 04:03 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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86ttop Offline
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If you remove all the computer controlled items and install all that stuff on your engine, It'll probably run terrible. The CCC system works well and when properly adjusted, the car will run fine. Personally, I think you're wasting money and time!


Leo Paugh
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#1050028 - 04/16/17 08:32 PM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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upflying Offline
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There are many threads about removing the computer..common enough topic to be a sticky.
http://www.montecarloss.com/community/ubbthreads.php?ubb=showflat&Number=245007#Post245007
But why wake up a 33 yr old engine that wasn't that great to start with?
That's like remodling a house without upgrading the wiring and plumbing.
IIWY, just drop in a crate 350 and then add all the performance stuff.
Better yet, keep the CCC intact with the 350 upgrade. You will be money ahead.
Computer removal is illegal and yes we know Kentucky does not do emissions checks.


Last edited by upflying; 04/16/17 08:33 PM.

86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

#1050036 - 04/17/17 01:58 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: 86ttop]  
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Griffin84ss Offline
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Georgetown ky
May I ask why you believe that I am wasting my time and money for? I want to keep my car with the original motor until something happens to it then I plan on putting a 454bbc in it's place but for now the engine that I have in it doesn't have even 100k miles on it so I'll run her til she blows.

#1050037 - 04/17/17 02:05 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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86ttop Offline
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without internal modifications, those add-ons most likely won't improve anything.


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#1050040 - 04/17/17 02:12 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: 86ttop]  
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Georgetown ky
What internal modification? I was kinda hoping that everything hooks up like if it was original now I'm lost?

#1050042 - 04/17/17 02:15 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: 86ttop]  
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Georgetown ky
What internal modification? I was kinda hoping that everything hooks up like if it was original now I'm lost?

#1050049 - 04/17/17 04:30 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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To make the engine produce more power, the first thing you need to do is to make it breathe better. By internal modifications, Leo probably means head valve work/ gas flowing, and possibly increased compression by using different pistons. If the engine doesn't breathe well to begin with (many engines from the MC era as standard don't), no amount of bolt on performance goodies will make much difference. Plus the standard heads will be a bottle neck in the system, effectively nullifying the carb and intake. Same with headers - what about the rest of the exhaust system? If the rest of the system is restrictive then the headers won't have any usable effect.

Ironically, the one part of the MCSS that CAN comfortably flow more air/ fuel, and easily work with and produce more power with higher tuned and/ or bigger engines (the CCC and Quadrajet) is the very part you want to get rid of! As Upflying said, you'd be better off getting the CCC system running properly and dropping in a used SBC 350. That setup would probably make a lot more power than fitting the the performance parts you already have to the 305, as well as saving you a lot of headaches trying to get non CCC parts to work with a car designed to run with the CCC.


1986 Monte Carlo SS

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#1050050 - 04/17/17 04:58 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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86ttop Offline
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My car has a 355 with a slightly hotter cam, with all the CCC system parts intact and in working order, including the E4ME carb, cleaner emissons, better torque, 20+ MPG and cruise all day with the A/C pumping!


Leo Paugh
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#1050052 - 04/17/17 10:46 AM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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Rather than spend that money on parts for a 305 why not spend it on the 454 BBC that you really want.
Here is how mine looks;
[Linked Image]
If you plan on making any kind of power no matter the platform you can plan on upgrading the rearend and the transmission as well.
Then it will be time for better brakes and suspension..
Guy


GuysMonteSS '86 SS,513 BBC,AFR Heads,UDHarold/Bullet Custom Solid Roller Cam,706 lift,255/263 @ .050,Jesel Shaft Rockers,Balanced & Blueprinted,Doug Nash 4+1 5 Speed,Hurst In-Line Shifter,Ford 9 Inch Rear,SC&C Street Comp Stage 2+ Front End Kit...
#1050071 - 04/17/17 06:48 PM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: Griffin84ss]  
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upflying Offline
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Originally Posted by Griffin84ss
May I ask why you believe that I am wasting my time and money for? I want to keep my car with the original motor until something happens to it then I plan on putting a 454bbc in it's place but for now the engine that I have in it doesn't have even 100k miles on it so I'll run her til she blows.

As mentioned, the heads are the cork preventing more power. Small combustion chambers, smog friendly compression ratios and small valves. Put better heads on the 305 and you still have small cylinders. And if you make more power with the 305, you are putting extra stress on an old lower end such as the crank, bearings and connecting rods.
To add to the confusion, the 302 in the gen 1 Z28 Camaros was an awesome engine. The reason is it used a 283 crank in a 327 block. Big bore ensured good breathing and short 283 stroke meant high rpm. This is why the 383 is such a cool engine too. In summary, the 305 does not have the breathing to make it a good performance foundation. Our 305's are small bore using the long stroke 350 crank. Great for emissions, bad for performance. For normal driving, it's a great engine.

Last edited by upflying; 04/17/17 07:16 PM.

86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

#1050079 - 04/17/17 08:28 PM Re: Redoing my 305sbc for my 1984 ss Monte Carlo [Re: upflying]  
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Griffin84ss Offline
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Georgetown ky
Thanks upflying, and guy's I may have been wrong In my original post talking about doing away with the computer wire harness in my 84ss I was just thinking about doing away with the ccc and I have done some reading on this subject of doing such and I apologize for any confusion about this my plan and I'm hoping that all the parts I've purchased will work with the computer or ccc I never really had any intention of doing away with such cause of what I've read and watched videos it is a really BIG DEAL to do.when I get my 305 pulled out I'm definitely going to have a Mechine Shop check out the bottom end of it and replace what needs to be replaced I know you guys are right about just putting in a 350sbc but this is my wife's and I idea to keep the original motor. It's our first project I really do appreciate all of you guys for the info on this topic. Thanks a bunch.!!!


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