1987 Iroc-Z 355c.i. Summit 8800 cam .450 lift with 1.6 intake rockers and Cat removed

[@fsckit]

That sounds really nice, keep posting the updates.

[@jeremiahwasabullfrog8854]

Thanks, will do!

[@bustahoneynut9873]

Major appreciations dude. Thinking about running this cam in my car and it sounds good on yours. Im trying to keep a budget build on a vortec 350 with 906 heads

[@nofember6912]

doing the same

[@jacobnorth8642]

It is the biggest cam you can run safely with zero other mods. Never put in a vortec so can't be sure of power difference, but was very noticeable in an old 91 305...

[@Donsautomotivechannel]

Sounds awesome should post some draggy times or something seems like a quick car

[@jeremiahwasabullfrog8854]

I lost 3rd and 4th gear. So until I get enough cash to get the trans sorted out I've been doin small affordable projects. Going to replace the cat with some tubing. Cat was creating too much back pressure for the cam. She revs real quick now.

[@jeremiahwasabullfrog8854]

Engine actually has tbi 193 swirlport heads. Since they flow really well on the exhaust side I put 1.6 on the intake only. So i started with straight pattern cam with a little more duration on the exhaust and 1.6 on intake gives it high lift low duration which should compliment the low rpm torque thes heads make. Want to see if I could break the crappy swirlport myth by balancing the intake / exhaust flow using two rocker ratios, 1.52 and 1.6 not to make a point, but just because that's what I got and heads are expensive and if I have to I'll lightly port and gasket port match them I will.

[@popeyeandstraussmx4165]

What’s your idle set to?

[@jeremiahwasabullfrog8854]

Hard to say, read about 1,000 but my gauge is off by up to 1,500rpms up high so it could be reading as much as 25 percent higher than actual so maybe 750rpms.

[@shon9kemp]

Just got this .450 cam. Just installed it today. Any regrets?

[@jeremiahwasabullfrog8854]

No, not yet. I got it because that was as high as i could go safely with my heads. It's a pretty mild cam but it worked out nice for my first build. This video is with no exhaust. Sounds pretty mellow in my other videos with flowmaster 80 series catback. I have some AFR 195 heads now that are good for .600 lift so I may be stepping up to the Summit Pro SBC 8802 cam or Lingenfelter 219 cam with 1.6 rockers for about .550 lift.

[@jacobnorth8642]

1.6 rockers add lift so it goes from being acceptable to engine damage, especially in vortecs with their low valve stem seal clearance. Valve spring specs become a major concern as lift rises also, keep lift low or get better springs. It might run at lower rpms but when you try to rev it out you will be risking vavle float...

[@jacobnorth8642]

I was pleased with that cam as a stand alone upgrade in a 91 305.