If I convert my 91 GTA from TPI to the LT1 setup, what would be a good choice for a cam that has a little lope to the idle?

 

Depends on what you want from the car. Do you want it to just idle w/ lope? That intake setup is a good setup for cams that like to pull up to about 6k and higher. Personally in a 350, a xe 224/230 is the smallest I would go w/ a short runner intake. You could run a 218/224, and it would lope pretty good, but not as much as the 224/230.

 

how about the comp cams 270H-R10. 270/270, 215/215, .500/.500, 110 LSA

 

I am planning on converting to the LT1 intake. As far as cam selection, what LSA should I be looking for and what LSA would the motor not like?

 

You better be running some heads with a wicked exhaust port backed up by a real serious exhaust system to consider a single pattern cam.

I think that cam is a bit short on duration for an LT1 setup, as you rev higher a decent spread in intake Vs. exhaust duration will help evac combustion gases. If you plan to run heads with a poor exhaust port you might actually want to consider an 8*-12* spread in duration to help keep balance.

 

i am going to be running the stock L98 heads with the LT1 intake. what cam numbers would you recommend for this setup.

 

The stock heads are going to present a flow restriction so any camshaft you go with is going to be compromised.

You'll need to keep the Lobe Separation Angle at least 112 degrees. This keeps the overlap under control so as not to confuse the O2 sensor and computer.

Hydraulic roller with 218/224 or 224/230 @ .050 with aggressive ramps and valve lift in the .550 range.

Jake