Bob Hoover mods

[Machinist]

I just purchased a new aluminum bubble top VW block for my 2276 and trying to decide if I'm going to do the Bob Hoover modifications. Do you guys feel it's really beneficial or should I just leave it along. I did the lifter grooves only on my old assembly and when I pulled the motor down after 3000 miles I had an excess of burned oil around the valve heads. Not sure if it was getting too much oil and filling the valve covers where it was entering the guides or just due to slightly worn guides. I installed new guides to eliminate that possibility but am still not sure about messing with the new block and lifters. Opinions?

[slalombuggy]

Engine specs and how do you drive it?

I did the mod to my CB and there was a big difference in the amount of oil in the rocker box.

brad

[vwracerdave]

I slot the lifters and enlarge the center cam oiling port on every engine I build.
_________________
2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK

[esde]

It's pretty well agreed that the VW engines need help getting oil to the heads, and if you run dual springs, the extra oil can also help cool them.
_________________
modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that.

[jeffrey8164]

I’m very close to building my 2276 and fully intend to exploit every mod.
_________________
Volkswagen!
Turning owners into mechanics since 1938.

“Let he that is without oil throw the first rod”
(Compression 8.7:1)

[mark tucker]

I do ,although I was doing them before I ever heard of bob hoover. so,... I may start calling mine the electrolux mods. like everything I do it's different than most. slotting lifer bores has nothing to do with oil on the intake valve heads any more than oil on the front bumper. well thats not entirely true, if you dont have any oil in the engine to lube the lifter bores than you probably wont have the issue of oil on the valve heads either......

[raul arrese]

I would check that case very closely , do the mods cause they need all the help they can get ..
_________________
" Hot vw feature , may 2014 issue "
" 2013 Bug Jam class winner "
" Bug Jam best motor and best paint "
" 2013 Lakeland Classic Best of Show "
" 2014 Show and Shine , First in class "
"
Like my facebook https://www.facebook.com/pages/Raul-Arrese-custom-fabrication-and-performance/1832968110262608

[Ryan Tucker]

Been searching for the thread explaining these oiling mods, not found it yet.
Link?
_________________
Do it don't talk about it

[challomoner]

[FreeBug]

I think a lot of us treat our engines like kids, and we all want our kids - sorry -engines to succeed in life to their full potential.

So of course you put in the time, money and effort to raise - sorry - build your engine to give it every advantage in this competitive environment.

Of course you do Hoover mods, it doesn't hurt* and could really help, like judo lessons.


*unless you break through to the outside when you drill out that long channel. Or break your toe in judo.

[slalombuggy]

The aluminum cases are much thicker. As long as the drill goes in straight, there is very little chance of going through the side.

brad

[ALB]

If you're worried about going through the case- fill the depression with 1/2" of epoxy. Give the area a good sand with rough paper beforehand.
_________________
On a lifelong mission to prove (much to my wife's dismay) that Immaturity is Forever!!

[vwracerdave]

Bob Hoover Blog http://bobhooversblog.blogspot.com/2007/05/hvx-mods.html
_________________
2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK

[Ryan Tucker]

Thanks a lot Dave thats what i was looking for, i put the hoover mods in the search bar and read through lots of threads but never found this direct info. I saved it to my bookmarks and will read through it tonight. Thx again
Ryan
_________________
Do it don't talk about it

[jimmyhoffa]

If one grabs a beverage of choice, and sits down and looks carefully at a set of unmodified cases, no logical person would say "yep, looks like everything gets oiled equally, I have no business in here!" For me that was reason enough. I can't imagine a world in which additional oiling to the 1-2 side wouldn't help.

If you want to see if you're cutting it super close or have some safe space or need to do the epoxy precaution trick, stick a drill through the existing lifter oiling bore and zero a depth mic on it, or something similar.

Then take your "depth mic or something similar" and stick it at the lowest point in the casting well next to the last lifter bore to see how sketchy it's going to be. In my case, not even close to danger.

That could also probably be accomplished with a piece of grid wire, a BBQ skewer and sharpie.
_________________
1974 Chenowth 2RL #1244 Street Legal
My other car isn't ridiculous.

[mark tucker]

[nsracing]

I don't Hoover anything. If you are just going to use a handgrinder on those new lifters, don't bother.

I just hate molesting fresh lifters. But if you must, a Dremel with cutting wheel will do a fine job making the slit or slot however you want the groove to come out.

Good luck

[mark tucker]

I wont slit the lifters.although I have removed the center band all together before.

[Machinist]

Mark Tucker, what do you mean by "dont forget to slot the lifter bores"

[vwracerdave]