Re solid roller lifters
Drifting
Joined: Jul 2002
Posts: 1,820
Likes: 283
From: Puyallup WA
No, not in either motor.
Funny thing is that back in the late 70's and 80's I routinely ran Big Block Chevy's with .600" to .700+" solid rollers WITH oil restrictors and experienced no failures. Back then, we were told to run oil restrictors any time you had a solid roller.
I wonder if the current day failures of solid rollers are in any way linked to the modern day oil with the reduced quantities of zinc? Those needle bearing are taking quite a bit of high pressure loading.
Steve
Funny thing is that back in the late 70's and 80's I routinely ran Big Block Chevy's with .600" to .700+" solid rollers WITH oil restrictors and experienced no failures. Back then, we were told to run oil restrictors any time you had a solid roller.
I wonder if the current day failures of solid rollers are in any way linked to the modern day oil with the reduced quantities of zinc? Those needle bearing are taking quite a bit of high pressure loading.
Steve
Drifting
Joined: Jul 2002
Posts: 1,820
Likes: 283
From: Puyallup WA
Burning Brakes
Joined: Jul 1999
Posts: 922
Likes: 164
From: Hudson NH
Cast cores for solid rollers are not a good deal IMO. They are weaker and more porous, and not much cheaper than a much more robust billet core. Cam suppliers will optionally press on a cast iron distributor drive gear so you can run your stock distributor gear – no need for fast wearing bronze gears or expensive polymer gears. And if your springs start to go way, particularly if you run marginal springs in the first place and do not employ a rev kit, the pounding on the closing ramp will mutually kill both the lobe and the lifter.
http://www.chevelles.com/forums/show...=cast+cam+core
There are downsides to running too strong or too weak a spring. IMO erring on the stronger side affords better lifter control, can better tolerate an over-rev situation, and will tolerate a loss in spring force longer than a too weak spring. Again I’m not advocating anyone run an 800 lb spring on a street roller w/ .600” lift.
http://www.chevelles.com/forums/show...+roller+spring
I do not run restrictors, and think they are a bad idea on a street roller cam setup. The lifters and springs need all the oil they can to survive.
http://www.chevelles.com/forums/show...t=solid+roller
http://www.speedtalk.com/forum/viewt...t=solid+roller
http://www.chevelles.com/forums/show...=cast+cam+core
There are downsides to running too strong or too weak a spring. IMO erring on the stronger side affords better lifter control, can better tolerate an over-rev situation, and will tolerate a loss in spring force longer than a too weak spring. Again I’m not advocating anyone run an 800 lb spring on a street roller w/ .600” lift.
http://www.chevelles.com/forums/show...+roller+spring
I do not run restrictors, and think they are a bad idea on a street roller cam setup. The lifters and springs need all the oil they can to survive.
http://www.chevelles.com/forums/show...t=solid+roller
http://www.speedtalk.com/forum/viewt...t=solid+roller
Race Director
Joined: Jan 2000
Posts: 13,014
Likes: 2,257
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Hey...Steve's here!!!!
Hi Steve!!!
You know where to find me...you know I can't resist. Too bad Mark took all the good lines....he was feeling frisky today and did a lot of typing.
So all I could come up with funky stuff!
Just so I make some contribution here.....I don't use restrictors either. Not a cam mfg out there that recommends them. Check with Reher/Morrison etc...they'll tell you the same thing.
Solid roller lifters already have edge orifice oiling that drastically limits oil flow to the top of the motor. Lifter to bore clearance, the hole in pushrod cup, the pushrod and the rocker arm will all determine how much oil goes to the top side. You don't want to restrict the oil going down the galleys. The lifters need all they can get. Especially in low rpm street conditions. This is one reason I like HV oil pumps..they hold more low rpm pressure and that puts more oil to through the lifters when puttin' around.
So Steve..not to hijack...but you need to tell us about the GT and the new 632 numbers.
I've got to plan a trip to your neck of the world.
JIM
Hi Steve!!!
You know where to find me...you know I can't resist. Too bad Mark took all the good lines....he was feeling frisky today and did a lot of typing.
So all I could come up with funky stuff!
Just so I make some contribution here.....I don't use restrictors either. Not a cam mfg out there that recommends them. Check with Reher/Morrison etc...they'll tell you the same thing.
Solid roller lifters already have edge orifice oiling that drastically limits oil flow to the top of the motor. Lifter to bore clearance, the hole in pushrod cup, the pushrod and the rocker arm will all determine how much oil goes to the top side. You don't want to restrict the oil going down the galleys. The lifters need all they can get. Especially in low rpm street conditions. This is one reason I like HV oil pumps..they hold more low rpm pressure and that puts more oil to through the lifters when puttin' around.
So Steve..not to hijack...but you need to tell us about the GT and the new 632 numbers.
I've got to plan a trip to your neck of the world.
JIM
Drifting
Joined: Jul 2002
Posts: 1,820
Likes: 283
From: Puyallup WA
John, I'll start a thread on Monday provided everything goes to plan this weekend.
Jim, my Ford GT ended up with 750+ rwhp and 690+ rwtq with the 3.50" pulley. I made more than that with the 3.25" pulley but the boost was too high for my comfort level. The sad thing is due to the weather up here I haven't been able to take the car for a drive yet. As far as coming up here, you know you are welcome any time.
Steve
Jim, my Ford GT ended up with 750+ rwhp and 690+ rwtq with the 3.50" pulley. I made more than that with the 3.25" pulley but the boost was too high for my comfort level. The sad thing is due to the weather up here I haven't been able to take the car for a drive yet. As far as coming up here, you know you are welcome any time.
Steve
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Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Melting Slicks
Joined: Nov 2001
Posts: 2,659
Likes: 7
From: Katy (Houston) TX
CI 7-8 Veteran
I've been watching this thread very closely because I just sold my solid flat tappet 383 and have moved to the BB Solid Roller club. One of the first 'not-so-necessary' small parts I'll be installing on the motor are studs for the valve covers cause it looks like those valve covers will be coming off a lot!!!
Steve,
Whenever you are ready to move down here to Houston there's a big group of us old vette guys (some old guys but I meant old vettes
) with a parking space and a few 
waiting on you.
Travis
Steve,
Whenever you are ready to move down here to Houston there's a big group of us old vette guys (some old guys but I meant old vettes
) with a parking space and a few waiting on you.Travis
Last edited by tshort; Jan 25, 2007 at 01:31 PM.
Melting Slicks
Joined: Nov 2001
Posts: 2,659
Likes: 7
From: Katy (Houston) TX
CI 7-8 Veteran
Thanks for the kind words. It's nice but I think it takes better pictures than it really is...kinda like a supermodel. You ever going to make it out to the CorvetteForum Cruise-In?
OK, back to your regularly scheduled programming.....
OK, back to your regularly scheduled programming.....
Race Director
Joined: Jan 2000
Posts: 13,014
Likes: 2,257
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Jim, my Ford GT ended up with 750+ rwhp and 690+ rwtq with the 3.50" pulley. I made more than that with the 3.25" pulley but the boost was too high for my comfort level. The sad thing is due to the weather up here I haven't been able to take the car for a drive yet. As far as coming up here, you know you are welcome any time.
Steve
Steve
200++ RWHP increase?????
And we weenie guys get excited about a cam change!!
JIM
Burning Brakes
Joined: Jul 1999
Posts: 922
Likes: 164
From: Hudson NH
As to the weather, well hard for me to feel too sorry for you. Current temperature as I'm typing this is -1F wind chill and dropping....
Hope you're well,
Mark
Le Mans Master
Joined: Jan 2006
Posts: 6,504
Likes: 139
From: Butler Pa
Are all you guys running solid roller cams also using stud girdles? My engine builder told me I needed girdles, which dictated the use of tall valve covers. I haven't tried yet, but the right cover may be difficult to get off because of the wiper door actuator. I had to grind some off of the firewall to clear the left side.
Race Director
Joined: Jan 2000
Posts: 13,014
Likes: 2,257
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
I run girdles...Mark used to not run them....but now he has Jesel shaft rockers that fit under his stock covers for that stealth look.
They are good insurance when spring pressures get pretty high and helps studs live with aluminum heads.
JIM
They are good insurance when spring pressures get pretty high and helps studs live with aluminum heads.
JIM
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
I run one with my weenie .651 lift cam.
