Current vendor for good roller lifters
#1
Current vendor for good roller lifters
I know Chevrolet Performance and Comp Cams were having issues with their roller lifters, who is the go to currently? I have a engine that's not for a F-Body, but I value your input.
This is for my 1978 C10 (for now).
Smeding performance 383 short block
Mercruiser 94666492 camshaft
Cloyes timing set c-3064k
Summit racing 67cc Vortec head
Chevrolet Performance head gasket (.028) - 14096405
Factory roller spider and dog bones
I have a 1800 stall speed TC and 3.42 LSD.
This is for my 1978 C10 (for now).
Smeding performance 383 short block
Mercruiser 94666492 camshaft
Cloyes timing set c-3064k
Summit racing 67cc Vortec head
Chevrolet Performance head gasket (.028) - 14096405
Factory roller spider and dog bones
I have a 1800 stall speed TC and 3.42 LSD.
#2
Member
Re: Current vendor for good roller lifters
I use nothing but Morel roller lifters in my motors, I love them.
#3
Junior Member
Re: Current vendor for good roller lifters
Morel is good. I have a set of howards that are made by morel that are a little noisy when cold but otherwise have no issues with them. Summit HT217 are the morel 7717 lifters that most people use in stock roller blocks and are IMO what I would use. The 7717 is no longer a full polished lifter but has the better internal valving.
#4
Re: Current vendor for good roller lifters
Is that timing set suitable for a step-nose cam?
#6
Re: Current vendor for good roller lifters
As long as the cam gear fits the cam, you're set.
#7
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Current vendor for good roller lifters
One suggestion, ditch that chain set for a Cloyes 91157. It is a single roller that is a stronger and more durable chain. The 91157 is equivalent to the stock GM Marine, HD L31 and ZZ4 chain set. Most 383 rotating assemblies will not make a full revolution without smacking into the camshaft if it is not timed correctly. The last thing you want is a broken inferior chain grenading the engine.
Last edited by Fast355; 10-17-2022 at 03:23 AM.
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Re: Current vendor for good roller lifters
https://www.johnsonlifters.com/
USA made. You get what you pay for.
I see too that Morels are made in the US.
There's not a chance in hell that I'd put an offshore valve train component in my engine. (Not that anyone has suggested that here...).
USA made. You get what you pay for.
I see too that Morels are made in the US.
There's not a chance in hell that I'd put an offshore valve train component in my engine. (Not that anyone has suggested that here...).
Last edited by skinny z; 10-21-2022 at 01:22 PM.
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Re: Current vendor for good roller lifters
Last edited by Fast355; 11-12-2022 at 01:15 PM.
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Car: 1983 G20 Chevy
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Re: Current vendor for good roller lifters
Have you calculated your static compression ratio? Is this a 5.7" rod? 3.75 or 3.80" stroke.
Last edited by Fast355; 11-12-2022 at 02:24 PM.
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Car: 1983 G20 Chevy
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Axle/Gears: 14 bolt with 3.07 gears
Re: Current vendor for good roller lifters
With the 08-417-8 DD2003 predicts the following
RPM--------HP------TQ
2,000------166------436
2,500------212------444
3,000------255------447
3,500------302------453
4,000------343------450
4,500------371------433
5,000------374------392
5,500------356------340
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Re: Current vendor for good roller lifters
I crunched the numbers on the 260HR, the XM270HR as well as a 3rd cam.
The 3rd cam is the Lunati Bare Bones LT4 hotcam, 20080130.
It is a 276/286 @ 0.006, 218/228 @ 0.050, .503 lift, 112 LSA and 108 ICL.
The 260HR is 8.30 DCR
The XM270HR is 7.92 DCR
The Lunati is 7.78 DRC
At 2,000 rpm the Lunati is down 10 ticks, but it comes back strong in the midrange compared to the XM270HR with 385 hp at 5,000. At 3,000 they make the same torque. At 3,500 the Lunati pulls ahead 10 ft/lbs and stays there. IMO the Lunati would be the most octane friendly. The XM270HR should be able to be tuned on pump gas with the tight quench. The 260HR just has too much dynamic for iron heads on pump gas in a heavy truck. Generally speaking 8:1 is the limit for iron heads on pump gas.
I have setup and tuned that Lunati in an OBS Yukon on 37s. It was a stock L31 bored 0.030" with flat top pistons and headers. With a ~2,000 rpm converter and 5.13 gears it would roast the 37s off it. I would have no reservations running it in a 383 with over 9.5:1 compression.
The 3rd cam is the Lunati Bare Bones LT4 hotcam, 20080130.
It is a 276/286 @ 0.006, 218/228 @ 0.050, .503 lift, 112 LSA and 108 ICL.
The 260HR is 8.30 DCR
The XM270HR is 7.92 DCR
The Lunati is 7.78 DRC
At 2,000 rpm the Lunati is down 10 ticks, but it comes back strong in the midrange compared to the XM270HR with 385 hp at 5,000. At 3,000 they make the same torque. At 3,500 the Lunati pulls ahead 10 ft/lbs and stays there. IMO the Lunati would be the most octane friendly. The XM270HR should be able to be tuned on pump gas with the tight quench. The 260HR just has too much dynamic for iron heads on pump gas in a heavy truck. Generally speaking 8:1 is the limit for iron heads on pump gas.
I have setup and tuned that Lunati in an OBS Yukon on 37s. It was a stock L31 bored 0.030" with flat top pistons and headers. With a ~2,000 rpm converter and 5.13 gears it would roast the 37s off it. I would have no reservations running it in a 383 with over 9.5:1 compression.
Last edited by Fast355; 11-12-2022 at 03:26 PM.
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