[sleeper]

Has anyone ever done a back to back test with the Crane Hi-Intenstiy lifters and regular hydraulic lifters? The engine is a 350 with 8.3 compression, 882 heads, Chevy Z28 intake, 600 Holley, 2 1/2 exhaust with turbo mufflers. Car is a 69 Chevelle with a 3.08 gear and Powerglide with a stock converter. The camshaft is a 214-224-112 Summit. This is not a bad combination but the cam is about 10 degrees to big for the compression. I was thinking of trying the bleed down lifters to restore some torque in the 1500-2500 rpm range. I tried the Rhoades lifters years ago and was not impressed at all. Too noisy and did not seem to have the higher RPM power I expected. They are out of the question. Has anyone ever taken the regular hydraulic lifters out and installed the Crane with no other changes? How much did the vacuum improve at idle? Did the gas mileage improve? How much cam "sound" did you lose? How much did the lifter noise increase? How much did the throttle response improve and did the power at the higher RPM's hold on as well as with the regular lifters? Thanks for any answers in advance.

 

[67 GTO]

Did it on a Pontiac 428 (224/230 @ .050). Lope wasn't quite as noticeable, but don't expect too much from them. No noise whatsoever, and no loss in performance. Looking at your combo I'd suggest installing a TH350 before you spend any money on the lifters. HTH.

EDIT - Just did some quick math. The lower 1st that a TH350 (2.52 vs the powerglides 1.76) offers would give you almost as much of a gearing advantage as if you changed rear gears to 4.56s (math says 4.41) and kept the 'glide. 2nd gear is 1.52, not much different than your current 1st. It's like you're starting in 2nd gear! I've been there/done that (68 Tempest) and it put a smile on my face.

 

[sleeper]

Thanks for the reply. I am really not concerned with first gear as much as high gear. I live in the mountains of Ky and most of our driving is up and down, slow for curves and then accelerate slowly until the next curve in the mountainous roads. I was trying to put a little more torque back in the bottom of high gear. This car is for a middle aged fellow who just wants to cruise trouble free on the least amount of gas possible, hopefully with some of 60's hi-perf exhaust sound. I may be wanting to much. Thanks again.

 

[sleeper]

Anybody else had experience???? HELP......