Author Topic: 600 hp solid roller street cam?  (Read 5780 times)

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Barry_R

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Re: 600 hp solid roller street cam?
« Reply #30 on: November 14, 2020, 06:55:01 AM »
That cam is a Comp XR292R.

It is "now"..

Did not have a marketing name back when Chris P and I were working up a list of them back several years ago.  Remains a pretty nice street racer stick.

plovett

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Re: 600 hp solid roller street cam?
« Reply #31 on: November 14, 2020, 06:59:17 AM »
I ran a Comp 308R on the street for a while before I built my blown motor. My Mustang ran high 10's with it and had no troubles driving in traffic or highway. I was running a 454 incher with ported Edelbrock heads.
I didn't run super high spring pressure, 200 seat and a little over 500 open. It pulled to 6500 fine.
The K-Motion 1100 spring works well with the 308R. I ran the regular Comp non-oiling roller lifter. The Comp roller lifters now have pin oiling and are a lot cheaper than the Crower hippo lifters...but I'm sure the Crower lifter is an outstanding piece.

My advise if you're going to run a solid roller on the street. Keep an eye on the springs. When they "go away" things bust. New springs every winter, new lifters every third year.

BTW, the 308R is .675 gross lift, 260@.050 duration on 110 lobe separation. A very old school mild ramp roller that's easy on parts.

Do you remember the compression ratio you ran with that combo, Tommy?

thanks,

pl

JamesonRacing

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Re: 600 hp solid roller street cam?
« Reply #32 on: November 14, 2020, 08:03:45 AM »
I'm using a Custom Comp 254/260 695 lift 110 LSA solid roller in my street 465.  Barry spec'd it for me a while back when he built the short block.  11:1 CR flat tops, Blairs street pro-ports.  It's a little rowdy, but pulls strong up close to 7K, idles around 1k.

That sounds good.  How did you decide on a 110 LSA?  Does it need idle quality?  Just wondering.  What do you think you are making hp wise?  Run okay on high octane pump gas?

thanks,

pl

Barry did the details of the cam.  Runs on pump 91 all day, went 11.41 with full exhaust and street tires.  Pulled 15mpg on a road trip (with the benefit of a TKO O/D)

https://youtu.be/DpB73U7_kzg

That cam is a Comp XR292R.

Thanks David and Brent.  Do you know how much spring pressure you are using with that one, David? 

I don't think I will ever get 15 mpg with my C6.  :)

pl

Springs were a NASCAR one-race deal that I found on ebay.  I don't recall the numbers, but they aren't crazy big.  The Jesel rocker arms on that engine have never complained.
1966 Fairlane GT, Silver Blue/Black 496/C4 (9.93@133)
1966 Fairlane GT, Nightmist Blue/Black 465/TKO (11.41@122)
1966 Fairlane GTA Conv, Antique Bronze/Black, 418EFI/C6
1966 F250 C/S, Rangoon Red, 445/T19
1965 Falcon Futura 4-door, Turquoise, EF! Z2363/4R70W

Jim Comet

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Re: 600 hp solid roller street cam?
« Reply #33 on: November 14, 2020, 08:55:07 AM »
I have Blairs Pro port heads on my 416. They flow over 300 at 500 lift. They do flow more at 600 lift but not a huge amount so why stress the valvetrain with 600, 650 or 700 lift numbers when there isn't a ton to be gained? It is an aggressive cam profile but the tight lash and low lift allow for less spring pressure which makes sense on a street motor. This motor was making over 500 ft lbs as low as Jays dyno could pull it down (3500 rpm ish). I think this cam in a 450ci motor would be very good on the street. Jim

Tommy-T

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Re: 600 hp solid roller street cam?
« Reply #34 on: November 14, 2020, 01:29:21 PM »
I ran a Comp 308R on the street for a while before I built my blown motor. My Mustang ran high 10's with it and had no troubles driving in traffic or highway. I was running a 454 incher with ported Edelbrock heads.
I didn't run super high spring pressure, 200 seat and a little over 500 open. It pulled to 6500 fine.
The K-Motion 1100 spring works well with the 308R. I ran the regular Comp non-oiling roller lifter. The Comp roller lifters now have pin oiling and are a lot cheaper than the Crower hippo lifters...but I'm sure the Crower lifter is an outstanding piece.

My advise if you're going to run a solid roller on the street. Keep an eye on the springs. When they "go away" things bust. New springs every winter, new lifters every third year.

BTW, the 308R is .675 gross lift, 260@.050 duration on 110 lobe separation. A very old school mild ramp roller that's easy on parts.

Do you remember the compression ratio you ran with that combo, Tommy?

thanks,

pl

I was running the old TRW L2298 domed pistons, Le Mans rods, and a 1UB crank. Pretty old school, I think compression was about 12:1. That motor is still on a stand in my garage.
BTW, I coated the tops of the pistons here at home with the Tec-Line do-it-yourself stuff. The slugs still look good on top and none of the coating flaked off. I'm impressed with this product.

plovett

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Re: 600 hp solid roller street cam?
« Reply #35 on: November 15, 2020, 05:49:52 AM »
I ran a Comp 308R on the street for a while before I built my blown motor. My Mustang ran high 10's with it and had no troubles driving in traffic or highway. I was running a 454 incher with ported Edelbrock heads.
I didn't run super high spring pressure, 200 seat and a little over 500 open. It pulled to 6500 fine.
The K-Motion 1100 spring works well with the 308R. I ran the regular Comp non-oiling roller lifter. The Comp roller lifters now have pin oiling and are a lot cheaper than the Crower hippo lifters...but I'm sure the Crower lifter is an outstanding piece.

My advise if you're going to run a solid roller on the street. Keep an eye on the springs. When they "go away" things bust. New springs every winter, new lifters every third year.

BTW, the 308R is .675 gross lift, 260@.050 duration on 110 lobe separation. A very old school mild ramp roller that's easy on parts.

Do you remember the compression ratio you ran with that combo, Tommy?

thanks,

pl

I was running the old TRW L2298 domed pistons, Le Mans rods, and a 1UB crank. Pretty old school, I think compression was about 12:1. That motor is still on a stand in my garage.
BTW, I coated the tops of the pistons here at home with the Tec-Line do-it-yourself stuff. The slugs still look good on top and none of the coating flaked off. I'm impressed with this product.

Tommy, do you remember what you were using for fuel with that engine?   I won't go to 12:1, but I might try 11:1 on high octane pump gas.  I can get 93 octane here, but 91 is much more common.

WILCO on the solid roller spring inspection and replacement.  I think with bushed, pressure fed lifters and a fairly mild cam profile, it will last pretty well.   I will keep an eye on it, though.  Springs are cheap and easy compared to other parts.

thanks,

pl
« Last Edit: November 15, 2020, 05:56:52 AM by plovett »

Tommy-T

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Re: 600 hp solid roller street cam?
« Reply #36 on: November 15, 2020, 12:16:43 PM »
For normal cruising I was using 100LL AVgas cut 50/50 with pump premium. If I was expecting an "encounter" or going to the track I'd run straight AVgas. It's available here locally for $5 a gallon and worked well for me.

Nowadays, with the availability of Octainium or Race Gas concentrate a 12:1 street motor is easier than ever. A $20 bottle of juice in 10 or even 15 gallons of pump gas and you're ready to go.

Compression is your friend.

plovett

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Re: 600 hp solid roller street cam?
« Reply #37 on: November 15, 2020, 12:45:50 PM »
Thanks Mr T! 

I will look into gas "supplements".  I do live near an airport.

pl

Mr T. says, "I pity the fool with low octane!"
« Last Edit: November 15, 2020, 02:46:32 PM by plovett »

afret

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Re: 600 hp solid roller street cam?
« Reply #38 on: November 15, 2020, 07:46:27 PM »
n/m
« Last Edit: November 16, 2020, 04:55:07 PM by afret »

bluef100fe

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Re: 600 hp solid roller street cam?
« Reply #39 on: November 15, 2020, 10:09:59 PM »
I really liked the Oregon 175 grind... in the 454 inch stroker deal I did for a truck pull. Ran pretty good in my f100 also. It isn’t a roller but pushed my truck to low 11’s at 118 mph... its 259/267 @0.050 lift was 0.650ish. Iron heads, stock rockers, c8ae-h heads and 428 CJ intake on it lol. My Blair cammed engine is .695 lift roller and has been trouble free so far lol.


<a href="https://servimg.com/view/14375057/64" target="_blank" ><img  src="https://i58.servimg.com/u/f58/14/37/50/57/img_2013.jpg" border="0" alt="Image hosted by servimg.com" /></a>

Cody Ladowski
1976 F-100 stepside
390 C6 9 inch
1.56 sixty ft.
7.38 @ 91.5
11.79 @ 111.5