325 HP 305!!! MUST READ
#11
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,351
Sorry for my part in the "confrontational" part of the thread. Making power with a 305 was never a problem for me. The stock heads can be ported and polished, crapy dished pistons and be replaced and the econo cam upgrade. Problem was alway keeping them in one pc afterwards. IMO 300 HP in a 305 is an easy build but anything over 270 HP you are moving into the high risk area on a stock or near stock 305 bottom end, even brand new.
#12
Sorry for my part in the "confrontational" part of the thread. Making power with a 305 was never a problem for me. The stock heads can be ported and polished, crapy dished pistons and be replaced and the econo cam upgrade. Problem was alway keeping them in one pc afterwards. IMO 300 HP in a 305 is an easy build but anything over 270 HP you are moving into the high risk area on a stock or near stock 305 bottom end, even brand new.
there is one post who calls pragmatists "305 haters" when it's anything but that.
It's just that as many know, with the availability of the 350 block, the interchangeable parts, it makes no sense to invest a lot of time and effort trying to get a 3.75 inch bore to perform and limiting the chamber size vs using a 4 inch bore for only a few dollars more (and no, not the one with Clint Eastwood)
#16
i fully support you bro. look at it this way, if it dont fit just put hood scoop on the hood. i think i remember seeing a holly carb that was low profile, as well as an air cleaner too. might be worth lookin in too.
... Guys all i asked was if it fit under the hood. i have the original block in my car. and i dont want to change it. i was just asking for a little more hp to my 305. I DONT WANT TO DO AN ENGINE SWAP. people have there reasons that mine. make sense? the block only has 49000 miles on it. I have decided on a different intake that should fit. I did not. i repeat did not ask if i should do this. i asked if it would fit.
Good day.
Good day.
#17
... Guys all i asked was if it fit under the hood. i have the original block in my car. and i dont want to change it. i was just asking for a little more hp to my 305. I DONT WANT TO DO AN ENGINE SWAP. people have there reasons that mine. make sense? the block only has 49000 miles on it. I have decided on a different intake that should fit. I did not. i repeat did not ask if i should do this. i asked if it would fit.
Good day.
Good day.
#18
this is an interesting thread.... For a few reasons.
Im in the situation of I have a matching numbers car with a 305. I want more horse power. This thread shows how to get the numbers from a 305.
HOWEVER!!!!!
Im fortunate enough to have a tune port injection, tune port computer and the complete wiring harness for the engine. what Id like to know is would the tune port work with this engine combination.
Now Im no moron when it comes to a 350 with a carbie. However injection and 305s are new to me. SO BE NICE!!!!! OR BE Prepared for me to fire one back
Im in the situation of I have a matching numbers car with a 305. I want more horse power. This thread shows how to get the numbers from a 305.
HOWEVER!!!!!
Im fortunate enough to have a tune port injection, tune port computer and the complete wiring harness for the engine. what Id like to know is would the tune port work with this engine combination.
Now Im no moron when it comes to a 350 with a carbie. However injection and 305s are new to me. SO BE NICE!!!!! OR BE Prepared for me to fire one back
#19
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,351
Are you asking if a TPI system will work on a 305? Sure since GM made a 305 with TPI all the parts are available. I assume your TBI currently. Your engine will have less compression and a different Cam that an original 305 TBI, getting it tuned could be a problem since you will be going backwards in power from a stock 305 TPI setup.
I will say I am not sure how much it matters if you have matching numbers unless this is a low miles Z28. If you swapping out the injection system then it would matter even less.
I will say I am not sure how much it matters if you have matching numbers unless this is a low miles Z28. If you swapping out the injection system then it would matter even less.
Last edited by Gorn; 10-26-2016 at 07:18 AM.
#20
Your RS 305 TBI uses crappy heads. The intake ports are designed for gas mileage, not performance, and they can't be "fixed". You need to scrap those heads and pick up a set of TPI heads, or better yet, HO heads.