91 K5 -Procrastination Build - bikini top!

[munepit]

Wow. That rear bumper is looking so good!!! I really like how its tucked up and in.

 

[nvrenuf]

Yeah, I've got the red-ass over the old motor so I'm reusing as little as possible. I'm having the heads reworked plus using the intake and oil pan but that's it, everything else will be sold as a core.

The cam is a Comp brand hydraulic roller kit - # k11-420-8.

.566 lift
215 duration at .050
110 lob sep
1800-5000 rpm range

I'm hoping it'll make a lot torque from about 2000-4000 rpm.

 

[nvrenuf]

Wow. That rear bumper is looking so good!!! I really like how its tucked up and in.

Thanks! It was kind of a pita because I had to redrill the frame and make nut plates to tack weld inside the rail because it's so close you'd otherwise have to pull the gas tank. I'm happy with the finished product though.

 

[folkenheath]

Yeah, I've got the red-ass over the old motor so I'm reusing as little as possible. I'm having the heads reworked plus using the intake and oil pan but that's it, everything else will be sold as a core.

The cam is a Comp brand hydraulic roller kit - # k11-420-8.

.516 lift
215 duration at .050
110 lob sep
1800-5000 rpm range

I'm hoping it'll make a lot torque from about 2000-4000 rpm.

Have you seen this one?

http://www.lunatipower.com/Product.aspx?id=2154&gid=289

Only 211/219 @.050, but has .550 lift, should give you more power in the same RPM range with a smooth idle.

The next step up has .575 lift, and duration still only in the 220s @.050.

I have the one after, that, which is .600 lift, but it has a little rougher idle with its tighter lobe seperation and duration in the 230s, and only 11" of vacuum, it wanted the better converter, the first two would work pretty well and provide smoother idles.

I really like comp cams, and usually use them, particularly the "Xtreme" series, but for some reason their big block hyd rollers don't have much lift relative to the duration, which is why I went with the lunati for that build.

 

[nvrenuf]

Ugh... Surfing via phone sucks....

Correction - .566 lift, not .516

I did look hard at the Lunati cams. I was looking at the .575 (60211) but ended up buying the Comp kit. Really just a coin toss between the two.

 

[folkenheath]

Correction - .566 lift, not .516

That's more like it! I just looked it up myself, a little older single pattern profile, but I think you'll like it. I usually like their Xtreme series but for BBC retro fit rollers the lift stops at .510 and the duration keeps rising, the one you picked looks better. I look forward to seeing it running! Wuubbaa!

 

[nvrenuf]

I aLmost forgot, the compression will be ~9.4 and I stayed with the small valves since the rpm range is relatively low.

 

[nvrenuf]

Alright, it's new motor time! I finally got every thing back from the machine shop and home life is slowing down some so I'll have some time to work on it.

Here are some pics of where I'm at now. Hopefully I'll get it together and dropped in over next weeks 3 day weekend.

Here are the specs of the new motor -

4 bolt main 454 block (#14015445)
NOS LS-6 GM Tufftrided, steel, cross drilled crank (#3963523)
Eagle 7/16 rods
Speed Pro hypereutectic pistons (9.4 comp)
Balanced

781 iron heads with 2.06 int / 1.72 exh valves
Comp Cams roller rockers

Comp Cams hydraulic roller kit - # k11-420-8 (degree'd)
.566 lift
215 duration at .050
110 lob sep
1800-5000 rpm range

Edelbrock Performer intake
Holley 750 carb
Sanderson shorty headers (Jet Hot coated)
MSD distributor, 6AL box & coil

Kwik Performance SBC serpentine belt conversion
Fancy new valve covers & timing cover

 

[nvrenuf]

Out with the old -

2 bolt main, cast crank 3/8 rod, OE flat tops (7.9 comp, I believe)

 

[nvrenuf]

In with the new!

 

[nvrenuf]

More...

 

[nvrenuf]

More pics next weekend when I finish assembling it. I'm really hoping to burn gas by Monday but I've got a fair amount (+ new gauges, clean up wiring, etc) to do so we'll see.

 

[howdiy]

Yeah, I've got the red-ass over the old motor so I'm reusing as little as possible. I'm having the heads reworked plus using the intake and oil pan but that's it, everything else will be sold as a core.

The cam is a Comp brand hydraulic roller kit - # k11-420-8.

.566 lift
215 duration at .050
110 lob sep
1800-5000 rpm range

I'm hoping it'll make a lot torque from about 2000-4000 rpm.

Should be a smooth running engine and make plenty of power down low, I'm running this cam

DURATION .050: 231 236
LOBE SEPARATION: 114 114
ADVERTISED DURATION: .006 291 296
GROSS VALVE LIFT: 597 613

And it is pretty smooth, I'd have no problem trail riding with it, it is a bit excessive though

I don't like the 110 lobe seperation though, I would get some thing 112-114

edit: looks like the cam is already in. I might be mistaken about the LSA, it's been awhile

Did you degree it?

 

[nvrenuf]

I really wanted a cam with some nastiness to it but ultimately I'd like to be able to just drive it sometimes and my wife wants to be able to drive it too so I scaled back a little.

The cam is degreed and it's balanced too. Trying to get it all right this time since the original motor sucked azz so bad.

 

[howdiy]

Yeah the 110 LSA should give you the lumpy idle

Hopefully I'll end up seeing your rig at a southeast event sometime

 

[nvrenuf]

Hopefully I'll end up seeing your rig at a southeast event sometime

ugh... pressure!!!

 

[folkenheath]

It's looking real good! I think with the 215 duration at .050 you will have a pretty mild idle, should be relatively smooth.

I had to look up that crank number, forged steel unit, nice!

 

[nvrenuf]

The machinist wanted the crank real bad. He actually said he was sad to see it go into a mud truck instead of a race car. To him theyre all the same, if it's 4wd it's just a beat up old mud truck.

 

[spicer]

I remember you motioned something about having a 454 steel crank, but I didn't know you had a Pete Moore in the box NOS rat holed... Sweet!

 

[nvrenuf]

I remember you motioned something about having a 454 steel crank, but I didn't know you had a Pete Moore in the box NOS rat holed... Sweet!

It came with a 481 Tom and I bought from Schlobohm years ago. Later when we sold the motor I made sure the crank stayed with me.