305 SBC headers

Jeremy K · 11-25-2009, 09:49 PM

I was looking at getting 1 3/4" headers for my 86 camaro so I could use them with my current bracket motor and possibly a future crate motor. But if I went with the 305/155 (stock eliminator), would these be too big? Should 1 5/8" be used? Basically just wondering what racers who run these 305's found out about primary tube size. Thanks.

greg fulk · 11-25-2009, 10:57 PM

If it was my car I'd run 1 1/2 step to 1 5/8...but that's just me

Brian Fink · 11-26-2009, 09:34 AM

Greg is correct with his response ; in this case smaller is better.

tj310 · 11-26-2009, 02:20 PM

We run 1 5/8 on our 305. If you are going to buy new and may want to run crate I would buy 1 3/4 price and quality being main considerations.

RE panhard bar I made a simple adjustable mount by modifing the housing.

Thanx Trevor

gmonde · 11-26-2009, 03:56 PM

do you have any hp numbers @ rpm????

Jeremy K · 11-26-2009, 06:40 PM

Quote:

Originally Posted by gmonde

do you have any hp numbers @ rpm????

No, I don't have a 305 motor built. I need to get new headers for the car anyway, I was just curious what some racers use on their 305's. I guess I was just wondering if 1 3/4" primaries would hurt the 305 a lot. Maybe 1 5/8" stepped to 1 3/4" would be a better option. I know headers should be bought for the specific engine combo they are bolted to, but I just wanted to have a set that could work OK on another motor as well (such as Vortec 350/330). Maybe a Vortec 350 only needs 1 5/8" anyway? Sorry for rambling, but this is a good place to learn stuff. Thanks.

11-25-2009, 09:49 PM	#1
Jeremy K Junior Member Join Date: Nov 2009 Location: Bridgewater, NS, Canada Posts: 79 Likes: 0 Liked 1 Time in 1 Post	305 SBC headers I was looking at getting 1 3/4" headers for my 86 camaro so I could use them with my current bracket motor and possibly a future crate motor. But if I went with the 305/155 (stock eliminator), would these be too big? Should 1 5/8" be used? Basically just wondering what racers who run these 305's found out about primary tube size. Thanks.

11-25-2009, 10:57 PM	#2
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: 305 SBC headers If it was my car I'd run 1 1/2 step to 1 5/8...but that's just me __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

11-26-2009, 09:34 AM	#3
Brian Fink Member Join Date: Jul 2007 Posts: 173 Likes: 39 Liked 28 Times in 9 Posts	Re: 305 SBC headers Greg is correct with his response ; in this case smaller is better.

11-26-2009, 02:20 PM	#4
tj310 Member Join Date: Sep 2009 Location: Dresden On. Canada Posts: 460 Likes: 0 Liked 0 Times in 0 Posts	Re: 305 SBC headers We run 1 5/8 on our 305. If you are going to buy new and may want to run crate I would buy 1 3/4 price and quality being main considerations. RE panhard bar I made a simple adjustable mount by modifing the housing. Thanx Trevor

11-26-2009, 03:56 PM	#5
gmonde Senior Member Join Date: Nov 2007 Posts: 615 Likes: 56 Liked 165 Times in 59 Posts	Re: 305 SBC headers do you have any hp numbers @ rpm????