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Let’s talk camshafts: AFM delete but keeping VVT
- Thread starter Bob Kazamakis
- Start date
The kit includes springs and push rods and the phaser. By the time you add up the phaser and springs your only a few bucks from the kit so kinda makes sense to just get it with push rods.
Vvt seems to have much higher lift than non. It was the cam they suggested for my mods (just headers/exhaust and tune in addition to the cam).
Can’t find vvt stage 2 results but here’s a non vvt 5.3 with the same specs. The stage 3 one has a recommendation of a stall and I don’t want to dive in that much. It’s more to delete AFM with the addition of more hp.
https://m.youtube.com/watch?v=fNdvPVUzGdA
Unless you are running high RPM, or loose tolerances you don't need a high volume pump.
It costs you some HP to drive over a standard volume/pressure pump.
It currently has a high volume pump.
I talked with a guy at Texas speed and he basically said stock is perfectly fine but I could change both for “peace of mind”.
I purchased the cam I talked about from TSP which included valve springs, cam phaser and pushrods. I still need to grab gaskets, valley cover and lifters/buckets still but I won’t be doing it for a month or two most likely so no rush.
Going to leave the timing set and oil pump but I think I’m going to change out the pickup O-ring since that seems to be a common failure.
The double roller chains are easy to clearance for. Usually some tiny grinding on the timing covers over the bolt heads. Also I usually take off like half of the bolt head height for more room/less grinding. I have taken apart a bunch of these things, only around 2 had low enough miles to keep the stock chain. Even then a bigger cam and springs I always do a chain. People used to just get a C5Rchain but now they cost too much and have been braking. If your chain is tight, I would get at least a timing chain dampner. solid one like this.
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I didn’t see anything aftermarket for a VVT setup. Texas speed said I could just do an ls3 chain for a replacement.
I see most dod delete kits come with a new tensioner so I planned on swapping it.
The cam came with a phaser limiter. Vvt seemed silly to get rid of when it can make more power overall and not just peak.
Honestly I’m not doing anything crazy so I think it’s just fine. Only other mod I was doing was the trunnion upgrade on the lifters.
Was just going to but this kit https://www.texas-speed.com/p-5213-...rocker-arm-trunion-kit-all-gm-ls-engines.aspx
Though summit has the bronze bushing one https://www.summitracing.com/parts/sum-141560
Though summit has the bronze bushing one https://www.summitracing.com/parts/sum-141560
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