Engine is a 1989 LB9 305.

Thinking of going with World Products iron S/R Torquer 305 heads, Comp Cams XFI268 cam, and shorty headers (Dons or Hookers, no AIR).

Down the road when I have some more money to burn I'll probably add a stealth ram, but for now I'll be keeping the factory TPI in place.

Already running 22lb injectors. Also going to an S-10 stall (about 2200).

Just for the street, no track time, no racing.

What kind of power will I pick up with that head/cam/header swap?

And how much more power will the Stealth Ram add? I know the TPI will keep me maxed out around 5000rpm and the stealth ram will increase that, I'm fine with that for now.

Don't want to move to a 350. Don't want to do an LS swap

Thoughts?

Thanks.

 

Should do neighborhood 275fwhp.

 

Eh pick up abit but not sure those heads are any better than stock tpi 305 heads

 

Save a lil more money and go 350.

http://www.jegs.com/i/Chevrolet-Perf...30283/10002/-1

+

https://sdparts.com/i-23896057-sdpc-...baseplate.html

Upgrade the cam if you're feeling adventurous.

Why? More power to start with. Fresh short block. Greater potential down the road. Won't leave you with 305 specific parts that no one will want later on, when you've decided you should have gotten a 350.

Just throwin it out there.

 

He could go ahead pick the TPI base up and rather than use the world heads on the 305, he could go with the 059/520 casting vortec heads. Put a set of Comp 787 retainers and LS6 springs on them. At that point they are good to 0.550" lift. My beater 1999 Tahoe has a Lunati 268 high efficiency flat tappet cammed 305 Vortec in it. Cam is 218/218 @ .050, .457/.457 lift (.487/.487" with 1.6s) on a 110* LSA and 106* ICL. Through a 4L60E and 9.5" 14 bolt, it put down nearly 260 hp at the tires at 5,200 rpm and runs best shifting at 5,500 rpm. The truck idles at 850 rpm in Park/Neutral with a slightly noticeable idle, in gear at 750 it gets a bit choppier, by 1,200 rpm it runs as smoothly as a stock Vortec cam. In the lower rpm range it feels fairly stock, but when the tach gets up in the 3,500+ range you can tell it is no stock 305 or 350 Vortec for that matter. It pulls hard from 3,500 to 5,500 rpm for what it is. I run a stock S10 torque converter in it that stalls around 2,600 rpm behind the 305.

 

Thinking of going with World Products iron S/R Torquer 305 heads, Comp Cams XFI268 cam, and shorty headers (Dons or Hookers, no AIR). Don't want to move to a 350. Don't want to do an LS swap



You are close. Did you see this?
https://www.thirdgen.org/forums/tpi/...-carb-tpi.html

 

If you didn't want to go to a 350 block, what about using aluminum heads at least?? They flow better and you save a little more weight over the iron heads. I'm not talking a ton, but the flow on them would probably help you pick up some more power as well.

 

Only aluminum heads for a 305 would generally be L98 vettes, trickflow 175 small bores or the gm fastburns which are a larger port than needed and overpriced imo

Small bore 305 cant use a valve over 2” else the valve will hit the bore at modest cam lifts

 

NoEmissionsGTA, I must have read that thread you linked 20 times wondering WTF you were talking about. And then I thought "Maybe he was trying to link a classified ad and messed up" and I found what you were trying to show me...lol...

 

Good, I saw that in the other thread.


I guess I did screw it up. I was trying to show you this: https://www.thirdgen.org/forums/engi...pi-roller.html
but you figured it out.