Hydraulic roller lifters vs solid

-
I

IQ52

Well-Known Member
Joined
Jul 30, 2011
Messages
2,870
Reaction score
3,071
Location
Idaho
Custom hydraulic roller cam in a 505. 1st pull hydraulic lifters, 2nd pull we switched to solid roller lifters. No other changes.

RPM................TQ/HP................TQ/HP

3000..............517/296.............523/299
3200..............539/328.............548/334
3400..............583/377.............594/384
3600..............587/402.............598/410
3800..............587/425.............599/433
4000..............597/455.............600/457
4200..............599/471.............600/480
4400..............596/499.............600/503
4600..............609/533.............611/535
4800..............617/564.............613/561
4900..............611/570.............622/580
5000..............611/582.............619/589
5200..............605/599.............614/607
5400..............594/610.............601/618
5600..............578/616.............591/630
5700..............566/614.............582/632
5800..............556/614.............575/634
5900..............550/618.............563/632
6000..............544/621.............560/639
6100..............533/619.............550/639
 
I put a milder cam in my 318 to help the bottom end and recover some dynamic CR.
What a mistake. I should have just dropped in these lifters for far less cost and work and I would have kept my top end.
 
it's still kind of surpising, that's a large jump

were the hydraulic roller lifters the same brand as the solid roller lifters?
 
cudaracer said:
I expected more. And how does one cam work with both?
Click to expand...

There are lobes that work both ways. I've run solid flat tappet lifters on flat tappet hydraulic lobes for 40 years on occasion.

moparlover said:
it's still kind of surpising, that's a large jump

were the hydraulic roller lifters the same brand as the solid roller lifters?
Click to expand...

Pulled out Crane lifters and went with Comp lifters.
 
Looks like the hyd lifters were loosing control around 5500 or so. It amazes me when guys cry about wanting to make the best power they can, and then run a hyd cam even when they have adjustable valve train.
 
Interesting stuff. Thanks for sharing that.
Have you ever done a dynotest while just varying valve lash on a solid (roller) cam?
 
More control, more power. What kind of lash were you working with? Aluminum or iron heads?
 
You must log in or register to reply here.
-

Back
Top