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LG4 cam suggestions

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Old Jul 23, 2020 | 02:07 PM
  #1  
Monteman71's Avatar
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Car: 1986 Iroc Z28
Engine: 305 LG4
Transmission: T5
LG4 cam suggestions

Hi Folks.
I have searched this,but did not find a definitive answer(in my mind lol),
I have a 86 Iroc,(Canadian) car,305 non ccc Quadrajet.
Can anyone recommend a mild street cam(,I am in process of exhaust upgrades,by the way.)Otherwise ,bone stock.
I assume,new timing chain,gears,lifters.
Would new springs be in the equation ?
Thanks
Shawn
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Old Jul 23, 2020 | 04:43 PM
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Re: LG4 cam suggestions

The Comp XE256 is well and widely known to be a good match to that engine. Pretty sure you can get a kit from them with the cam, timing set, & lifters. You will DEFINITELY need to change out the springs; pretty sure they have a kit that has the whole deal, in fact. https://www.summitracing.com/parts/cca-k12-234-2
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Old Jul 24, 2020 | 08:21 AM
  #3  
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Re: LG4 cam suggestions

I used a K1103 Summit cam and it did pickup a bit of power in my old LG4. The Comp cam Sofa mentions is pretty close to the same grind so should make around same power and would certainly be a better choice in quality I would imagine.
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Old Jul 24, 2020 | 02:42 PM
  #4  
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From: Ontario
Car: 1986 Iroc Z28
Engine: 305 LG4
Transmission: T5
Re: LG4 cam suggestions

Thanks guys,I will look into these.
So can I expect a bit of low end improvement.?
Not to open the old 305 vs 350 discussion,but is the money invested worth the gains? l would like to keep the car as stock as possible,but would like some performance improvement beyond exhaust work.
Thanks
Shawn
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Old Jul 24, 2020 | 03:46 PM
  #5  
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Axle/Gears: 10 Bolt.Posi-3.73s
Re: LG4 cam suggestions

Get a 350if you are starting to think that way . It wont "look" any different than a 305.Dang sure wont hurt the value of the car if the swap is done correct. I put headers and cam in an LG4 and it was no faster than my old TPI 305 car.
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Old Jul 24, 2020 | 04:16 PM
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Re: LG4 cam suggestions

Originally Posted by Monteman71
Not to open the old 305 vs 350 discussion,but is the money invested worth the gains?
Being what it is, the 305 is still a SBC. As such it'll respond to the usual bag of hot rod tricks. Heads, intake, cam and exhaust will all produce a performance improvement but starting with that particular engine will limit that performance.
That said, it's still a V8 and has that V8 sound. That's what keeps me in the game. When my 350 was in the machine shop, the spare 305 (yes, I had a 305 as a reserve) went into the Camaro with the same headers. I added a performer intake, dropped the Holley on it and drove around like that. Mostly in 2nd gear for reasons you can imagine.
Go for it and enjoy the hobby.
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Old Aug 28, 2020 | 01:57 PM
  #7  
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From: Ontario
Car: 1986 Iroc Z28
Engine: 305 LG4
Transmission: T5
Re: LG4 cam suggestions

Thanks for the tips guys,I get the idea the 350 would be the ticket.
I was thinking of cam work but,I think that money is best spent on a 350.
Im going to install Dyno Dons headers and y,and get rid of the "T" pipe lol,maybe pickup some hps

Last edited by Monteman71; Aug 28, 2020 at 02:57 PM. Reason: typo
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Old Aug 31, 2020 | 10:40 PM
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Re: LG4 cam suggestions

Originally Posted by Monteman71
Thanks for the tips guys,I get the idea the 350 would be the ticket.
I was thinking of cam work but,I think that money is best spent on a 350.
Im going to install Dyno Dons headers and y,and get rid of the "T" pipe lol,maybe pickup some hps
This is a good plan. Do the bolt ons to the 305, which can all be transferred to a 350 at a later date. Leave the internals of the 305 alone and just run it. If you want more power later, then do the 350 swap.
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