8.1L dyno test today.

[454Sub]

Well today is the day (9am appointment) to dyno this 8.1 I have built. Luckily I am laid off at the moment or this would be impossible. Anyways, it spun a rod bearing after to many high rpm burnouts and donuts and whatever else this thing went through at exactly 100k miles.

So, I went ahead and ordered a Comp Cams XR270 grind cam, Beehive springs, hardened pushrods, roller rockers, new ARP studs, and 10 degree locks and retainers, ditched the valve rotaters, milled and ported the heads plus a 3 angle valve job, ported the intake as best as possible, used Gibson stainless headers and it already had decent dual exhaust so we just reused it, a new K@N cold air intake, gave it new moly rings (which are nearly impossible to find for the 8.1 btw) and bearings, plus had about 10lbs removed from the crank and rebalanced the entire rotating assembly.

So, hopefully it stays together on the chassis dyno, and I shall report back on what these things can push after you remove all of GM's multiple failings. BTW, the factory cam on these things would work in my 18hp Briggs and Stratton Snapper Forrest Gump lawnmower.

So in all and hopefully

 

[Deuling]

 

[COCHEV]

Yes! Can't wait!

 

[herkdriver007]

Can't wait to seeeeee!

 

[Engineered Vintage]

Awesome!

 

[scotto0609]

OK I give an uneducated case of 495 hp and 535 torques!

 

[79rustyk10]

This should be pretty interesting.

 

[82355]

OK I give an uneducated case of 495 hp and 535 torques!

To the rear wheels???

Martin

 

[Deuling]

To the rear wheels???

Martin

Dang it you beat me to it



Martin

 

[Chevy305]

Wow you removed 10lbs from the crank, I wonder how much is left...



Oh and:

 

[Stomis]

I'm guessing HP will be way up, 600 range at crank and ill say it will belt down 750ft/lbs.

 

[ratlover]

How did you tune it outa curiosity?

Look forward to you posting up a dyno sheet

 

[496truck]

In for curiosity.

And good point, dyno engine alone or in the vehicle?

 

[Smokinthehippies]

in for the glory!

 

[Deuling]

In for curiosity.

And good point, dyno engine alone or in the vehicle?

chassis dyno

 

[nvrenuf]

V.i.d.e.o.

 

[imiceman44]

Wow you removed 10lbs from the crank, I wonder how much is left...



Oh and:

I don't know about that. More weight on the crank makes for better inertia which provides for a smoother idle and help tq

 

[scotto0609]

Well now that i think i am way off I'll go chassis dyno! I was just gettin the ball rollin.

 

[Greg72]

Curious to see what the driveline losses are on this one.....

Transfercases and large tires are bound to soak up a LOT of power, so it's going to be a lot harder to put down big numbers than a "typical" car.


-G

 

[max 02]

Subscribed!