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accelration upgrades for a 305 firebird vin e

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Old Feb 8, 2011 | 08:47 PM
  #1  
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accelration upgrades for a 305 firebird vin e

okay everyone i have a 1992 firebird 305 vin type e and this car is basically my project car and first car i ever had i just recently got a new exhaust sytem for it ( from cat to back) and wondering wat all i can do to get more acceleration


Wat i got in mind:
cam with .447 lift 220 duration hydraulic
headers (either hooker or flowtech) also y pipes
after market air intake manifold
and thinking about a performance chip

like i said first car doing everything myself to learn about engines
so i dont know all terminollogy (and cant spell)


let me kno guys
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Old Feb 9, 2011 | 05:20 PM
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Re: accelration upgrades for a 305 firebird vin e

Sounds like you're keeping TBI, so I'll move this to the TBI forum.
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Old Feb 9, 2011 | 07:06 PM
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Car: 1992 Camaro rs
Engine: Lo3
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Re: accelration upgrades for a 305 firebird vin e

Well you will want to make sure you get a roller cam for that motor if its the factory block. I had a problem with my 92 LO3 when i first bought it. Turns out the po had the motor rebuilt with a non-roller cam under roller lifters. Which isn't good. Do the basics first with a tune up and everything first to get the most out of the base power.
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Old Feb 9, 2011 | 09:09 PM
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Re: accelration upgrades for a 305 firebird vin e

Headers and exhaust w/ hi flow catalytic converter will yield best seat of pants gains.
Then address the air cleaner. The stock setup is crappy. So whether you had an open air element. or cold air kit. do it!
After that bump up the timing to around 6*
dont spend any $$$ on a manifold yet
and to really get a lot. change the rear end gears to at least a 3.23. Stock is a 2.76 gear I believe and that is more for highway crusing then performance. The car will feel a ton better with all that!
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Old Feb 9, 2011 | 09:51 PM
  #5  
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Car: 1989 Iroc-Z Camaro
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Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: accelration upgrades for a 305 firebird vin e

Yes,start with the bump in timing to 6* (its free)
Everything that was mentioned by UnderCover89TBI.
Those are the basics

Last edited by Ron U.S.M.C.; Feb 9, 2011 at 10:02 PM. Reason: changed info
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Old Feb 9, 2011 | 10:00 PM
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Re: accelration upgrades for a 305 firebird vin e

I guess a cam couldnt hurt either. But it really depends on what you wanna do. Itd be nice to do a head swap, cam swap, new timing chain etc at the same time....
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Old Feb 9, 2011 | 10:40 PM
  #7  
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From: nc
Car: 92 firebird
Engine: 305 tpi "stock"
Transmission: slipping
Axle/Gears: 3.42 posi disk brakes!
Re: accelration upgrades for a 305 firebird vin e

my uncle selling me this cam with a double timmin belt and cover (plus feul pump) for 200
and for the heads wat do u believe would be the best?
and cheapest
also wat do u believ would be the best headers for it? hookers or flowtechS?
thank yall alot not going to lie still learning as i go
Thanks for the help!!
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Old Feb 9, 2011 | 11:12 PM
  #8  
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Re: accelration upgrades for a 305 firebird vin e

hookers.
Heads it depends. thier are multiple purposes for different heads. I dont know where you are located, the most cost efficient is a set of vortec heads but they require an external egr if you have smog etc.
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Old Feb 10, 2011 | 04:22 PM
  #9  
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Re: accelration upgrades for a 305 firebird vin e

Hooker 2055's work great. Open element air cleaner. Look for a used roller cam. 220@50 is a lot of duration. May be a pain to tune especially if lsa is < 112.
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Old Feb 10, 2011 | 05:16 PM
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Car: 1989 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.23 LS
Re: accelration upgrades for a 305 firebird vin e

Vortec heads? What if i remove my smog pump?
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Old Feb 10, 2011 | 05:29 PM
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Re: accelration upgrades for a 305 firebird vin e

Originally Posted by Timinsk
Vortec heads? What if i remove my smog pump?
Removing the smog pump will clean up the engine bay but won't add any power. Vortec heads are a decent option but need a lot of supporting mods to utilize them correctly. If your car is stock you should start elimination air flow bottle-necks in order of importance.

Exhaust (headers to tialpipe
Air Intake
Chip Tuning
Cam
Chip Tuning
Intake manifold
Heads
More Chip Tuning
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Old Feb 10, 2011 | 07:30 PM
  #12  
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From: nc
Car: 92 firebird
Engine: 305 tpi "stock"
Transmission: slipping
Axle/Gears: 3.42 posi disk brakes!
Re: accelration upgrades for a 305 firebird vin e

so more duration is bad and less is good??
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Old Feb 10, 2011 | 07:38 PM
  #13  
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From: nc
Car: 92 firebird
Engine: 305 tpi "stock"
Transmission: slipping
Axle/Gears: 3.42 posi disk brakes!
Re: accelration upgrades for a 305 firebird vin e

okay cold air or open air wich brings more?? and also i found this cold air intake on ebay for forty bucks but all the pics show it hooked up to a supercharger i think here the link
http://cgi.ebay.com/ebaymotors/PONTI...item56406c7f5d

will it fit my stock aircleaner???
also if i rebuilt my heads will that be cheaper than buying new ones???
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Old Feb 10, 2011 | 07:45 PM
  #14  
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: accelration upgrades for a 305 firebird vin e

Originally Posted by dabird07
also if i rebuilt my heads will that be cheaper than buying new ones???
It depends on what your goals are. If you want to run the stock cam, than your stock heads are fine. If you want to run a cam that makes power in the lower RPM region, than the stock heads are fine. If you want to run a cam with higher than .480" lift, then you should look into some machine work to cut the guides and replace the pressued in rocker studs for screw in units. It would be better if you could explain your goals first. We can then guide you on the right path from there
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Old Feb 10, 2011 | 08:07 PM
  #15  
dabird07's Avatar
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From: nc
Car: 92 firebird
Engine: 305 tpi "stock"
Transmission: slipping
Axle/Gears: 3.42 posi disk brakes!
Re: accelration upgrades for a 305 firebird vin e

Originally Posted by ShiftyCapone
It depends on what your goals are. If you want to run the stock cam, than your stock heads are fine. If you want to run a cam that makes power in the lower RPM region, than the stock heads are fine. If you want to run a cam with higher than .480" lift, then you should look into some machine work to cut the guides and replace the pressued in rocker studs for screw in units. It would be better if you could explain your goals first. We can then guide you on the right path from there
lol

ok i want more torque and hp for acceleration rpms wat would u advise?? idk that much for rpms (learning as i go)
cam with 447 lift
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Old Feb 10, 2011 | 08:34 PM
  #16  
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: accelration upgrades for a 305 firebird vin e

Well....Bolt ons will go a long way for your combo. Also, a small cam swap (LT1) with tuning will give you great off idle power. This all depends on your ability to tune your chip (DIY and not mail order). Cam lift is not what you want to look at when choosing a new bump stick. LSA, overlap, and duration have 99% more impact on your power band than cam lift. I would recomend taking some time to search this board and read, read, read. The more you learn the less money you will spend and the faster your car will be.
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Old Feb 10, 2011 | 09:06 PM
  #17  
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From: nc
Car: 92 firebird
Engine: 305 tpi "stock"
Transmission: slipping
Axle/Gears: 3.42 posi disk brakes!
Re: accelration upgrades for a 305 firebird vin e

main reasons im getting this cam is for every thing that is included

cam duration 220
lifters (hydraullic) .447
double timing belt
cover for belt
and feul pump
all for 200

i believe is good buy opinions??

and thanks for the help and trust me for thhe past weeks all i have been doing is reading!!!
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