Budget 350

[TAZZ 1]

My springs where updated to Z28 Springs and the rocker studs where pined.

 

[sandlapper]

Not solely because lift / coil bind--- I'd much prefer somewhat stiffer Z28 springs as well, especially so with the Intensity of any comp XE cams' fast aggressive ramps.

Lofting lifters can be an advantage in race motors --- not so much when endurance of street motor is required.

below, stock car references stock (race) cars --- but the Intensity precepts remain valid for all

Choosing a proper cam for stock cars - Camcraft Cams

One of the most difficult tasks facing today’s racer is camshaft selection. The advertising in the camshaft industry is often misleading and contradictory. The important information about lobe designs is not available and if it were, few people would know what it means. Everyone wants the latest...

www.camcraftcams.com

 

[Rustbucket350]

Not solely because lift / coil bind--- I'd much prefer somewhat stiffer Z28 springs as well, especially so with the Intensity of any comp XE cams' fast aggressive ramps.

Lofting lifters can be an advantage in race motors --- not so much when endurance of street motor is required.

below, stock car references stock (race) cars --- but the Intensity precepts remain valid for all

Choosing a proper cam for stock cars - Camcraft Cams

One of the most difficult tasks facing today’s racer is camshaft selection. The advertising in the camshaft industry is often misleading and contradictory. The important information about lobe designs is not available and if it were, few people would know what it means. Everyone wants the latest...

www.camcraftcams.com

This can backfire. Stiffer springs are a good idea to control the valvetrain as long as they're within the cam manufacturers recommendations. Too stiff is far worse than too loose. I could have a 55 gallon can full of wiped cams and lifters if I saved my souvenirs.

Wiped 3 cams and like 40 lifters on an aluminum headed 350 with .560 lift. I used 1.6 rockers to give it more lift on a hydraulic cam. That was a bad idea. The stock rocker ratio is perfectly fine if you size the cam appropriately. The additional leverage creates more force on the lifter. When combined with valve spring pressure, the results were disappointing. Ran Royal Purple 30 wt break in. Flames blowing out of the carb.

I don't think valve float (we can talk about the agressive angle modern lobes are ground on here) is as much of an issue as people on the internet say. I have never had a stock valve with stock springs smack a piston at even 6500 or 7500. Or even a regular performance cam do nothing other than what it was supposed to. Minus the valve train automatic deletion I said earlier. This is also why I quit believing in magic oils. I do use regular off the shelf conventional oil and a bottle of stp zddp additive for my oil.

There is something to be said for the simplicity of the engine. Put a balancer on it. Put a cam in it. Bolt on some heads, an intake, a carb, and go rev the piss out of it.

90% of the time this is what puts off a lot of guys from hotrodding. "Is it going to work?" Wrong question. Make it start. And then go have fun.

 

[sandlapper]

In principle, I don't disagree ....
FWIW, the difference in seat psi between a typical OE spring (~80 lbs on seat) and a typical "Z28" spring (~110 lbs on seat) is only about 30 psi. Other springs can be Much greater psi.
JMO, that 30 psi increase Alone ain't a lobe killer. YMMV

 

[sandlapper]

FWIW from bona fide expert: here's a Current, Present-Day look at float, bounce, and loft

SpinTron Secrets: Valve Float, Bounce, and Loft Explained!

In this segment of Spintron Secrets, we dive into the concept of Valve float, the phenomena that cause it and a few valvetrain topics that can make or break a race engine. Rev on!

blog.trendperform.com

 

[TAZZ 1]

Ok I have not had much time to work on my cars, but I did get little budget 350 painted. Wanted show the results I got using POR 15 engine paint. I did spray it . It will run easy but i would use it again. I do wish they would put in spray can.

 

[biker]

Ok I have not had much time to work on my cars, but I did get little budget 350 painted. Wanted show the results I got using POR 15 engine paint. I did spray it . It will run easy but i would use it again. I do wish they would put in spray can.

Looks good. When do we get burnout vids?

 

[TAZZ 1]

LOL still a long way to go. But i can only dream right now.

 

[450bench]

What a great, strong, reliable and fun combo. Plus being low maintenance

 

[TAZZ 1]

Wanted to share few more photos trying keep this project going hope to get it in the car soon. Rebuilding front sub frame also been waiting on lower control arm bushings for over a month.