No disadvantage.

 

Cost to have the bores enlarged.

Has to be done by a skilled machinist. Had it done on a BBC and it was done wrong. Lost a good block.

 

Bigger wheel, bigger axel and bigger body ++++++

 

Going to the .905 will give you the opportunity to have a cam cut specifically for the larger wheel diameter. You can run a much more aggressive lobe, while keeping the same pressure angle. This will give you the ability to shorten the seat and .050 numbers, while increasing the .100 and .200 and up numbers with no ill effects at the lobe interface.....providing that the rest of the valvetrain is up to snuff. Or.....if you just drop them on a lobe cut for an .842 lifter with it's .750 wheel, you'll lower the pressure angle by a large margin and increase the lifespan of the lifter by way of less stress at the lobe interface. If the budget allows, having a cam designed for the larger wheel diameter is a great benefit though. Bore stability is another benefit. The only "disadvantage" would be a slight increase in cost. Beyond that, as chris stated, there isn't any disadvantage.

 

As said, cost of added machining, special cam, and higher priced lifters. The only other I have heard mentioned was the bigger lifters weigh more, but with the added stability this will never be seen by the valve spring. If you have the chance, do it. You will not regret it.

 

Kewl, tanks for the feedback! Good details Enigma.
Now I'm trying to decide between three different brands of solid roller lifters.
Crane, Jesel, or CompCams. There appear some differences in surface treatment, but I need to check on weight.

 

Jesel lifter are probably the best there sizing is spot on and they are round and straight, There .904 lifters run a little compared to a Morel lifter but they are DLC coated. TOP OF THE LINE!!!!

Second would be Morel as I have never had to send a set back becaus of sizing issues.

Third would be ISKY but I have to say it has always taken 2 set to make one set of lifter because of sizing issues per set.

Crower I have not been very happy with there sizing go over this link.
http://www.yellowbullet.com/forum/showthread.php?t=423501

What ever lifter you buy check it for roundness, straightness and make sure its fit to the lifter bores and I look for .0014 to .0019 for lifter bore clearance.

Its amazing how many guys just buy lifters and dump them into the bores without measuring anything

Good luck which ever way you go!!

 

crane crower jessel morel. I'd research a little more before i would add comp to that list

 

Is there something wrong with Isky?

 

I don't believe so, but with all brands regardless some people manage to have trouble, which makes one wonder

 

I'm a Jesel dealer... I've sold over 80+ sets of the Solid Body lifters, with not one failure yet. But I always advise customer when their doing there build too oversize them for their application....

 

Ditto the Jesel solid body. A great lifter and I've sold them as well (also a Jesel dealer) with no issues at all. In the big picture it's a good investment and there are no downsize to larger lifters.

 

If you can, go bigger. same thing about cam core size

 

I should have my jesel solid body .937 lifters and my .842 morels Thursday, I hope they are as nice as everyone says. I will measure and post any findings.

 

Jesels are nice.

 

Jesels are very nice, I just received my solid body .937 lifters today,awesome.

 

How many guys with ls engines are running the over-sized solid lifters? Last I heard the concern with them in the ls engine is having so little material left in the block around the over-sized lifters. I'm waiting on a nasty little lsx for an F3 blower and the builders chose to stick with .842s. (Isky red zone)

just saw that this over 6 months old..any news OP?

 

With a stock block I would be concerned with bushing that far because it will restrict the oil gallery, we have a similar issue with amc engines as they oil the mains the same.

 

Id recommend the standard bore Isky EZX or EZMAX... Non needle bearing lifters.. EZX (good for 1100lbs open).. EZMAX (good for 1400lbs open).... I run a standard bore EZX in my motor, .900 lift and 7800 through the traps... No issues whatsoever... I sell a lot of these. Glad to help. .... but no, there's no disadvantage, just not always needed.

 

I can say, knock on wood, I have far less if not nill issues with a .904 lifter VS a .842 lifter, much better IMO

 

i agree, with the bigger lifter, you can be more aggressive with the camshaft!!

 

Are those Ultra Pros the ones with the bushings or needles?

 

I have Jesel .937 Keyway lifters going in my new SBC engine with 60mm cam core

 

Hopefully its a raided cam tunnel block !

 

800 runs on my .937 keyed lifters, they look like they've never even been run.

 

Ultra Pro Morel lifters still have needle bearings

 

What is a fair price to cut the lifter bores for the bigger size? i.e. BBC to .904

 

What is a fair price to cut the lifter bores for the bigger size? i.e. BBC to .904

300.00 if I am just doing lifter bores.

 

250/300 around here