Vortec Head Modifications - Undercover Porting Brzezinski Racing Products - At 216 pounds, the block is 100 lbs.. 290 hp (216 kw) at 4000 rpm and 410 lbâ·ft (556 nâ·m) at 3200 rpm. Last intake on the recommend intakes list is the holley weiand stealth ram, 2 piece intake setup which does have some possibility for vacuum leak but 2 much better than 8. There are other, smaller points that are important to know because they affect cam selection. I ported mine and fully worked the exhaust port (bowl work and contouring the runner). Ebay motors vortec 350 rpm hp torque 3,000 213 361 3,500 246 370 4,000 310 407 4,500 350 408 5,000 378 397 5,500 410 391 6,000 429 376 6,500 425 343 parts list description
As illustrated in the pics in post #60; My cams gross lift is.559. We used up about 10 heads, numerous valves, and about $50,000 worth of labor. The stock valve job can be improved on vortec heads. There are other, smaller points that are important to know because they affect cam selection.
Vortec 8100 8 1l Efi Intake Manifold 496cid Carburetor Intake Manifold Intake Manifold Porting Raylar Engineering from www.raylarengineering.com Joined jun 15, 2005 · 2 posts. Starting in 1996, on several gm trucks and vans, the l31 vortec heads came on the scene. I will need to cut (reduce the height) of the valve guide boss.this is the curse (or part of the curse) of the vortec heads. Joined sep 19, 2010 · 120 posts. Ebay motors vortec 350 rpm hp torque 3,000 213 361 3,500 246 370 4,000 310 407 4,500 350 408 5,000 378 397 5,500 410 391 6,000 429 376 6,500 425 343 parts list description Two years ago we undertook an exhaustive (no pun intended) study of the vortec head in numerous modified states with different valve sizes, throat cuts, valve jobs, port mods, guide mods, etc. Do they have a downside? The cam is based on the maximum lift for stock vortec heads and is a single pattern 215d/470l on a 112 center.
By changing the springs, the distance between the retainers and the valve seals hasn't changed.
Ebay motors vortec 350 rpm hp torque 3,000 213 361 3,500 246 370 4,000 310 407 4,500 350 408 5,000 378 397 5,500 410 391 6,000 429 376 6,500 425 343 parts list description These heads are good for a minimum 50hp gain. My vortec heads are good to.500 in/.530 ex (with 'forgiveness' in mind) with common components used and absolutely no machining done to the heads valve guides/spring pockets. Vortec head modifications hi everyone, im looking to modify a set of vortec heads for oval track racing application. There are other, smaller points that are important to know because they affect cam selection. 290 hp (216 kw) at 4000 rpm and 410 lbâ·ft (556 nâ·m) at 3200 rpm. The real weakness of the vortec head is the exhaust port, a fact that is readily apparent when you get into porting these heads. A 28 hp increase over the stock heads, and the 305 engine now has close to 300 hp. Discussion starter · #1 · jun 15, 2005. My cams gross lift is.559. 1 of 2 go to page. I am not going to install lash caps. For stock cam, heads and cr that's very good.
For stock cam, heads and cr that's very good. These heads are good for a minimum 50hp gain. We used up about 10 heads, numerous valves, and about $50,000 worth of labor. Vortec head modification for.480 lift. This quick tech video from comp cams® demonstrates how easy it is to use valve spring seat cutters and valve guide cutters to quickly and easily machine near.
Can You Modify L31 Vortec Heads To Work On A Second Gen Lt1 Page 3 Corvetteforum Chevrolet Corvette Forum Discussion from cimg0.ibsrv.net Even with the valves removed, it resembles a stock head. Comp cams recommends that its pn. As illustrated in the pics in post #60; This is the speed secrets episode for you! Discussion starter · #1 · jun 15, 2005. Discussion starter · #1 · sep 24. I ported mine and fully worked the exhaust port (bowl work and contouring the runner). I am not going to install lash caps.
I will need to cut (reduce the height) of the valve guide boss.this is the curse (or part of the curse) of the vortec heads.
As illustrated in the pics in post #60; We used up about 10 heads, numerous valves, and about $50,000 worth of labor. They also feature gm logo cast into bottom of intake ports. Are you looking to get almost 100 more horsepower from your gm 350 crate engine? I will need to cut (reduce the height) of the valve guide boss.this is the curse (or part of the curse) of the vortec heads. Increased valve lifts require stronger springs. A 28 hp increase over the stock heads, and the 305 engine now has close to 300 hp. My cams gross lift is.559. Two years ago we undertook an exhaustive (no pun intended) study of the vortec head in numerous modified states with different valve sizes, throat cuts, valve jobs, port mods, guide mods, etc. + up to.550 lift on vortec heads w/ no mods! The study generated 100+ pages of flow and swirl data, which i have at my. The stock valve job can be improved on vortec heads. Tony, just remember that total lift is the cam lobe lift and the rocker arm ratio for total lift.
Do they have a downside? For stock cam, heads and cr that's very good. Tony, just remember that total lift is the cam lobe lift and the rocker arm ratio for total lift. By changing the springs, the distance between the retainers and the valve seals hasn't changed. I will need to cut (reduce the height) of the valve guide boss.this is the curse (or part of the curse) of the vortec heads.
Speedmaster 1 147 004 Sbc Lowrise Vortec Intake Manifold Satin Ebay from i.ebayimg.com So the best bang for the buck is gm vortec head but does require a special intake and lots of egr work if you need egr to remain emission legal. 298 hp @ 5,500 rpm. Modifying the heads to accept early intake manifolds is not recommended. Starting in 1996, on several gm trucks and vans, the l31 vortec heads came on the scene. Increased valve lifts require stronger springs. Featuring the comp cams xm270h ca. At 216 pounds, the block is 100 lbs. Just be careful with used vortec heads as they are prone to cracks after 100k+ miles of heat and cooling cycles, iron cracks.
The real weakness of the vortec head is the exhaust port, a fact that is readily apparent when you get into porting these heads.
Two years ago we undertook an exhaustive (no pun intended) study of the vortec head in numerous modified states with different valve sizes, throat cuts, valve jobs, port mods, guide mods, etc. So the best bang for the buck is gm vortec head but does require a special intake and lots of egr work if you need egr to remain emission legal. Are you looking to get almost 100 more horsepower from your gm 350 crate engine? 290 hp (216 kw) at 4000 rpm and 410 lbâ·ft (556 nâ·m) at 3200 rpm. Vortec head modifications hi everyone, im looking to modify a set of vortec heads for oval track racing application. The real weakness of the vortec head is the exhaust port, a fact that is readily apparent when you get into porting these heads. Heavier than the aluminum ls1 block. Im trying to make them suitable for my selected camshaft. I am not going to install lash caps. 308 ft/lb torque @ 3,900 rpm. By changing the springs, the distance between the retainers and the valve seals hasn't changed. Comp cams recommends that its pn. There are other, smaller points that are important to know because they affect cam selection.
