Hey everyone. I was wondering if anyone knew if the stock 5.0 TPI block in a 1988 GTA could handle a 100 - 150 nitrous shot safely? Thanks.

Carlos

 

Small V8s can typically accept up to 140 extra horsepower, this range will provide maximum reliability from stock motors using cast crankshafts and pistons with few or no motor modifications.

 

I second that notion. Your 305 should work great at a little under the 150 jetting NOS recommends in there TPI kit (.058 to a .061 jet). This will get you the max performance out of the nitrous and not risk killing your engine. I recommend highly that you do a 180 degree or lower T stat and keep the car under 200 degrees when you run the spray. With this setup you should be fine with stock heat range plugs and timing.

 

I am up to a 145hp dry shot with my Zex kit.

Stock block, stock heads.

 

i have a .061 nitrous jet on my wet kit for my 305 tbi. works wonders and car hauls ***.

 

Thanks. I was hoping to hear at least 150. Now is that a wet or a dry shot??

 

150 is pushing mine i think is a 130 as im told but it pulls real nice last night at a 25 mph roll in an LO3 let me remind you otherwise pretty much stock i spun like a **** and made a huge cloud it made that much of a difference