Kelford High Lift cams

[rr06rs]

I was wondering if anyone has seen the new High Lift TX276 and TX284's? Kelfords are already about as agressive as it gets and these things just look MONSTEROUS!!! I'd love to see the 276 on something with a 3794HTA revving out to 9k. 4g63's seem to love lift so I'm very curious....

1-TX276HL High Lift Camshaft Set

 

[99gst_racer]

Holy crap, almost .500" lift on that intake cam!

Those are a full .059 greater lift than the standard 272's and with a bit more duration.

I've venture to say that very few people here have an engine and turbo that would actually need these cams. These things look pretty serious.

 

[rr06rs]

So nobody has tried these cams?

 

[standard235]

I think I may have found the cam for my build...

I was just going to do the 272 Kelfords but daaamn

Just a HX35, 10.5 comp, e85.

 

[FastTSiAWD]

I think Need2boost was running these on his stroker motor with a S366. Except I think he was running 280/276. He said that it was an awesome setup on the street, of course, it was in a stroker too

I'll be running a pretty aggressive set, except they're going to be a custom grind from Kelford; going to work with them to get a good 'stroker' combination Then again, I also think the only thing not going to be custom on my build is the Pauter X beams I'm getting anxious for the build to be done, everything is bought except the drive train

Anyway, didn't mean to ramble off topic

 

[stann999]

Has anyone run these cams? Do you use the stock lifters without issue? I just bought them and now I am concerned about stock lifters breaking prematurely under the high lift.

 

[99gst_racer]

@ my post from 2.5 years ago. I actually have these cams being delivered to my house tomorrow, so I'll have some experience with them soon enough. Should be fun with 85 lbs/min and 9500 RPMs on an auto...

Stann, I plan to run stock lifters on mine, and I'm not concerned. I believe the guides will need to be cut down though. I'll be building my cylinder head within the next couple weeks, so I'll find out for sure.

 

[stann999]

Oh nice, they do look like good cams because the high lift provides potential for high power but the moderate duration may allow less low end power loss. 85 lbs/min! What is that, 900 whp?

So are you saying you think the valve guides may need to be trimmed because the lift will make some part of the valve train bump into them?

 

[99gst_racer]

85 lbs/min! What is that, 900 whp?

Hopefully 850ish at the crank. Quite a bit less than that at the tire though.

So are you saying you think the valve guides may need to be trimmed because the lift will make some part of the valve train bump into them?

Yes, that is my understanding. just alot more lift than they were designed for. I'll find out for sure soon though.

 

[tomas123]

These are quite frankly insane.

 

[BogusSVO]

It would be simpler to install the guides lower in the head than trim the top. If you trim the top bevel off you stand a chance of having issues installing the seal.

Then if any trimming needs done, take it from the bottom of the guide.

 

[stann999]

BogusSVO, have you had to trim the valve guides on other aggressive DSM cams before?

Also, is the potential guide clearance issue from the valve seal running into the top of the guide near maximum lift?

 

[BogusSVO]

The clearance issue is the bottom of the spring retainer smashing the top of the seal.

I checked a few heads years ago for that clearance issue, for some of the smaller 272 cams and they were not an issue at the .460 ish lift point.

With the intake cam being .492 with the high lift cams, it is a point to check.