Largest Hydraulic Roller cams ?
Thread Starter
Race Director
Joined: Feb 1999
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From: Indianapolis IN
Largest Hydraulic Roller cams ?
How big can you go before there are "issues"?
I had been looking at the TPIS 701 cam, solid roller, .242/.242,, and I noticed that are are some Hydrualic Rollers that have the same duration and similar lifts. I did not want the once a year maintenance of the solids.
What size of Hydraulic Roller is equivelant to a .242/242 solid roller?
[Modified by ld85, 2:59 PM 10/16/2003]
I had been looking at the TPIS 701 cam, solid roller, .242/.242,, and I noticed that are are some Hydrualic Rollers that have the same duration and similar lifts. I did not want the once a year maintenance of the solids.
What size of Hydraulic Roller is equivelant to a .242/242 solid roller?
[Modified by ld85, 2:59 PM 10/16/2003]
Drifting
Joined: Dec 1999
Posts: 1,462
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From: Reno nevada
Re: Largest Hydraulic Roller cams ? (ld85)
It depends on who you talk to. Off the shelf S-roller 242/242 might be listed to sell as 244/244 with the exact same cam lobe profile as the solid. The reason being is valve lash. The H-roller is alrady lifting the valve when the solid is still taking out the slop.
The solid with lighter weight valve train can handle the higher spring pressures required to follow extreme ramp speeds. That not applicable to the street.
The duration limitation on H-rollers is the 6500 or so rpm limit
The solid with lighter weight valve train can handle the higher spring pressures required to follow extreme ramp speeds. That not applicable to the street.
The duration limitation on H-rollers is the 6500 or so rpm limit
Race Director
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From: The Top of Utah
Re: Largest Hydraulic Roller cams ? (Lt1er)
The duration limitation on H-rollers is the 6500 or so rpm limit
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Burning Brakes
Joined: Oct 2001
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From: Tracy California
St. Jude Donor '05
Re: Largest Hydraulic Roller cams ? (CFI-EFI)
Personaly I think the H-rollers that turn high RPM aren't as agressive as the stuff listed above. An agressive H-roller will float the valves before an equally agressive S-roller! If high RPM is your game 6500+ I'd seriously consider the solids.
Some guys will run more spring pressure on the H-stuff to buy a little more usuable RPM. I tried like hell to to get my Comp XR288-HR-10 236/242 to stop floating the vales at 6500. Even after new Comp (H)springs were installed they'd be good for 2 maybe 3 trips to 7000 then they're garbage. I switched to a solid and put the hyd on the shelf.
KM
Some guys will run more spring pressure on the H-stuff to buy a little more usuable RPM. I tried like hell to to get my Comp XR288-HR-10 236/242 to stop floating the vales at 6500. Even after new Comp (H)springs were installed they'd be good for 2 maybe 3 trips to 7000 then they're garbage. I switched to a solid and put the hyd on the shelf.
KM
Thread Starter
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From: Indianapolis IN
Re: Largest Hydraulic Roller cams ? (88-406)
My max RPM will be 6000 because I am swapping to a Super Ram FROM the Miniram.
If I go solid roller it will be the .242/242 w/ .610/.610 lift,, this is the TPIS 710 cam.
If I go solid roller it will be the .242/242 w/ .610/.610 lift,, this is the TPIS 710 cam.
Burning Brakes
Joined: Oct 2001
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From: Tracy California
St. Jude Donor '05
Re: Largest Hydraulic Roller cams ? (ld85)
Cool, at that RPM you should be fine with either one. I think Ski_Dwn_it & Corkvette both run solids with the SRam and would probally be a good source for info like what springs etc...
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Thread Starter
Race Director
Joined: Feb 1999
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From: Indianapolis IN
Re: Largest Hydraulic Roller cams ? (88-406)
Yes, I am duplicating their setup exaclty but since they have a solid roller, the TPIS 701, I wonderd about an equivelant HR.
Thread Starter
Race Director
Joined: Feb 1999
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From: Indianapolis IN
Re: Largest Hydraulic Roller cams ? (88-406)
Yes, the Dart 215C heads hurt the numbers for sure and the car was runing way rich. We figure there is @ 20HP to be gained from tuning. Pl;us the car made HP all the way up past 6000RPM .
I have stock 400 crank and I-beam forged rods with Hyper pistons so I dont want to go past 5800RPM or so.
350RWHP / 375 RWTQ
I have stock 400 crank and I-beam forged rods with Hyper pistons so I dont want to go past 5800RPM or so.
350RWHP / 375 RWTQ
Burning Brakes
Joined: Oct 2001
Posts: 1,033
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From: Tracy California
St. Jude Donor '05
Re: Largest Hydraulic Roller cams ? (ld85)
How have you been tunning it? Are you using a wideband and burning your own chips? Ski might be a good source for chips. I remeber when I lit my 383 off on the dyno, I couldn't beleive how lean it was going in the mid range. I think the MiniRam has very unique fuel requiremnets.
Is your SuperRam set up for 1206 gaskets? I've got a 1206 SuperRam sitting in my garage JFYI.
KM
Is your SuperRam set up for 1206 gaskets? I've got a 1206 SuperRam sitting in my garage JFYI.
KM
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: Largest Hydraulic Roller cams ? (88-406)
How have you been tunning it? Are you using a wideband and burning your own chips? Ski might be a good source for chips. I remeber when I lit my 383 off on the dyno, I couldn't beleive how lean it was going in the mid range. I think the MiniRam has very unique fuel requiremnets.
Is your SuperRam set up for 1206 gaskets? I've got a 1206 SuperRam sitting in my garage JFYI.
KM
Is your SuperRam set up for 1206 gaskets? I've got a 1206 SuperRam sitting in my garage JFYI.
KM
I am trading my Miniram with a guy that has a Super Ram that is a 1205 gasket. I may weld more material onto the SR for a 1206 but I think the AFR-210's come in a 1205 version too. Thanks for the offer though
