305 upgrades

[1989Formula]

I have a 1989 305 TPI motor with a stick shift and i am starting to look at little boltons for some more power

Has anyone done 1.6 roller rockers, headers, or other upgrades (around 200$ range) that help this motor out a little? what would be my best option?


Also has anybody one here removed their smog pump / ac compressor and gotten the serpentine to work ?

[Darren]

Hey Erik, there is a lot you can do to the 305, usually the same style upgrades you do to a 350 without the big gains. You will get flamed for putting any work into a 305 just as a fair warning but I think you should! I also have a 305/5 speed and I am putting a little work into it as well. Some popular wasy bolt ons of course are headers, exhaust, the LT1 cam swap, rockers and the list goes on... I have the SMOG removed from my car as well with all the emmisions and I can send you a picture of how to run the belt without the SMOG I am planning on deleting the A/C as well and just havent done it yet.

Start with the easy stuff, Headers, exhaust, removing SMOG and go from there. I really want to do the LT1 cam swap in mine I just havent had the time to do so. But there is other things you can do to wake up the 305 too, Upgrading your rear to a 3:73 gear or even higher really wakes these car's up. Just a thought

[1989Formula]

Hey Erik, there is a lot you can do to the 305, usually the same style upgrades you do to a 350 without the big gains. You will get flamed for putting any work into a 305 just as a fair warning but I think you should! I also have a 305/5 speed and I am putting a little work into it as well. Some popular wasy bolt ons of course are headers, exhaust, the LT1 cam swap, rockers and the list goes on... I have the SMOG removed from my car as well with all the emmisions and I can send you a picture of how to run the belt without the SMOG I am planning on deleting the A/C as well and just havent done it yet.

Start with the easy stuff, Headers, exhaust, removing SMOG and go from there. I really want to do the LT1 cam swap in mine I just havent had the time to do so. But there is other things you can do to wake up the 305 too, Upgrading your rear to a 3:73 gear or even higher really wakes these car's up. Just a thought

If you could send a picture of how you have it routed that would be great

mine has a cam in it but i dont know the specs (previous owner installed) but it sure sounds good

i figure any work I put into a 305 I can transfer over to a 350 as long as its an 87-up block ...i mean almost all sbc stuff is interchangable as long as i dont start tearing into the rotating assembly

[Darren]

If you could send a picture of how you have it routed that would be great

mine has a cam in it but i dont know the specs (previous owner installed) but it sure sounds good

i figure any work I put into a 305 I can transfer over to a 350 as long as its an 87-up block ...i mean almost all sbc stuff is interchangable as long as i dont start tearing into the rotating assembly

That is exactly my thought too, have some fun with the 305 untill the 350 or bigger swap is finished. I have the piture on my home computer I will post it up for you when I get back home. The picture I have is just without the SMOG as I have not removed the A/C yet.

EDIT: I did a search over on TGO and here is the diagram I used when routing mine after the SMOG delete...

belt.jpg

[meissen]

Are you talking about a stock LT1 cam, Darren? I happen to have one sitting in the garage I'd let go of for cheap.

[Darren]

Are you talking about a stock LT1 cam, Darren? I happen to have one sitting in the garage I'd let go of for cheap.

I am talking about a stock LT1 cam, its a very popular and beneficary upgrade from the stock peanut 305 cam. How much is cheap

[Darren]

Here is a great read up on a guy over on TGO breaking into the 13's with the L03 305 and 5 speed combo...

http://www.thirdgen.org/techboard/tb...e-results.html

[cole]

That article was pretty good for the TBI, are there any good article over on TGO for the TPI (L89 I believe) upgrades? I have heard that one big thing with the TPI is the airflow and there is only so much you can do with the stock setup.

[Darren]

oh yeah TGO is a world of knowledge for thirdgens, if your not already I highly recommend signing up over there and starting to read. There is so much information over there at first you can easily become over whelmed but every problem that I have had with my car I have found the answer there and you will get the best advice on what mods to do and what not to do. If i get a min i'll look over there for something for the TPI 305 but most of the mods will be the same as the L03.

[cole]

oh yeah TGO is a world of knowledge for thirdgens, if your not already I highly recommend signing up over there and starting to read. There is so much information over there at first you can easily become over whelmed but every problem that I have had with my car I have found the answer there and you will get the best advice on what mods to do and what not to do. If i get a min i'll look over there for something for the TPI 305 but most of the mods will be the same as the L03.

That's cool. I signed up a couple months ago, I just haven't looked around too much yet. Other things came up and I haven't been able to work on the car very much.
I'm sure a lot of the mods are the same as I remember reading about the peanut cam also.

[1989Formula]

That's cool. I signed up a couple months ago, I just haven't looked around too much yet. Other things came up and I haven't been able to work on the car very much.
I'm sure a lot of the mods are the same as I remember reading about the peanut cam also.

there is a lot of good technical information ....but be careful there is also a good ammount of misinformation

overall i like tgo


I just ordered the A/C delete pulley from summit so I should have the serpentine system reconfigured by this weekend

[Darren]

there is a lot of good technical information ....but be careful there is also a good ammount of misinformation

overall i like tgo


I just ordered the A/C delete pulley from summit so I should have the serpentine system reconfigured by this weekend

I agree with this, just dont accept everything as fact and you'll be ok over on TGO.

So whose upgrading their 305? and what are you doing to it?