Ok so i came close to selling my girl due to buying another car but decided not to.
So this my deal i do not want to put a 350 in her ive got a bbc inthe other car. I
just want to have a cheap rebuild for daily driving and some autocross.
. It has a 305 tpi with 416' cast heads and the peanut cam. ive got sone parts laying around like 1.5 roller tip rockers m/t valvecovers and a l31 cam and friend of mine is giving me some flat top 4 valve relief pistons.... i guess my question is the l31 cam a good up grade from the peanut cam?

 

It'll be a little bit of an upgrade. I did the LT1 cam in my 305, which is just a little bigger than the L31 cam and it runs good. I also have 416 heads that I ported and the combo works really well.

 

Not much of a upgrade

191/ 196 .414 /.442

Less duration and similar lift to the 305 cams
https://www.thirdgen.org/forums/post...611-post3.html

 

remember the L31 engine is pretty much a truck engine . good luck .

 

Prolly just c if i cant find a cheapo used lt1 cam somewhere then. Already spent close to a thousand on rear supension a year ago might as well spend alittle extra for used cam.

 

Lt1 Cam with flat top pistons will it work without ecm work? ..ive got a 86 iroc with maf.

 

I think the 86 is a flat taped motor. LT1 cams are roller cams. You need to retrofit your block.

 

305 i have is a roller block.

 

Mine is running fine on the factory tune, although I believe there will be a bit better fuel economy and a few more horses to be had with a tuned chip. Mine has shorty headers , full 3" mandrel pipe, ported heads ,intake manifold , runners, and plenum with a set of hyperutetic pistons and the LT1 cam.

 

Whats ur gas mileage like?

 

I haven't been on any long trips with it, but on its usual 10-20 mile trips it gets 22 usually.

 

I put an LT1 cam in my L69, and it really woke it up. If the block you have did not have roller cam in it before, you will need a bunch of other stuff too ( Dogbones, holddown spider, pushrods, cam retainer, roller cam timing set, maybe self aligning rocker arms). ECM was fine with the change. MAF adjusted with no issues.

 

Nice...thats good to know i figured if it was gonna get bad gas might as well up grade to an lt1.....my block is a roller block and already has all those goodys in it .... ive tried to to look into other cams as a stock cast upgrade other then the lt1 cam any other suggestions ???

 

What is your budget?
There are better cams out there but they cost $$$
The LT1 cam is a popular swap because it can be had for free or next to nothing
and it only costs your time and some gaskets to fit to a OEM roller block.

 

Well i went ahead and bought a lt1 cam decided to go withit because of $$$....anyways thanks everyone for ur help!

 

I like the factory LT4 and ZZ4 cams, cheap, make great power and have good driveability.

 

I like the lt4 hotcam i was gonna use that with a l31 with 906 heads i have but i really would rather keep the 305
And use all these 305 parts i have lying around then spend a tone of money on a daily driver and use on auto cross.