What do you think this solid roller would be like in my ride et wise and on the street?

I am going to run a new and improved version of the UD 288/296 F7 that Harold is working on but just wanted to bench race a little on this grind (must be winter).


http://www.chevelles.com/showroom/Chris_69_SS/CCrollercard288CR8.jpg

Thats a CompCams: 3200+ pound car, rpm's 3200-6200, with 4000+converter. Mighty stout for the street, but I think a very good cam for your combo at the track! ;)

Well, I know how Winter can be so I can't fault your mind for wandering. My mind is doing the same thing with my combo. ;) Personally, I don't think you need anywhere near that much lift (It must eat valve springs by the truckload! :D :D ) but the duration isn't bad.

Rod

Hey, Chris!!

Give me a break!!

If you want a 288/296R, you might as well get the REAL one, the original, the UD 288/296R7/8/9/10...
This one is from April 1980, about 2 years before their 288/296R came out. The original is 255/263 at .050, 176/183 at .200(7° bigger on intake and 10° bigger on exhaust!), .710"/.710" valve lift, and I have made them on all 4 LSAs.
My current favorite for street cars is on 109° LSA. The timing at .020" on 109 LSA is: IVO 39° BTDC IVC 69° ABDC EVO 81° BBDC EVC 35° ATDC. If the valves were set tighter than .030" hot, the opening/closing points would grow a little, 2° opening for 3° closing, for about every .006".
The 110s idle the best, the 107s run the fastest. The LAST cam made at UltraDyne was a SBC SB288/296R9 for my own personal use, which should indicate where my thoughts are.....
Chris, you know I'm kidding you. I have 'slightly' redesigned the 288F lobe, still 288 at .020, still 255 at .050, somehow it grew 1° at .200, still .3600" lobe lift. I seem never to leave 'good-enough' alone..... I should have it back from the master-maker within a week to 10 days.....
Bench-race away....

UDHarold

Harold,

Don`t worry Harold! Not going to the comp camp!

Can the 288/296R be had with "street friendly" lift? How is life on the street with these long term. Good for 10`s?

Thought you might enjoy this...

http://www.chevelles.com/showroom/Chris_69_SS/ResizeofResizeofUD.jpg

Chris,

Hey, I wrote that ad myself! I liked it, in my style....
What is a 'street-friendly' lift? I have that 286/296 with .685/.680 lift, and the intake certainly is just a lower-lift version of the 288, 286=R9, 288=R10. Below .065" cam lift they are identical(except for the 2°). How about .645"-.650"?, about .625' net lift. I have some new 'Xtreme-Killers' designed, to be made later this year, but they have .663" gross lift.
As far as reliability, I have been using the 288296R6and R9 as daily-drivers for about 20 years, if you like 500+ HP engines. I have a Olds driver on RealOldsPower with a 455 Olds+060 in a 64 Olds 442 at 3670 lbs. It is 9.8:1 CR, 1 7/8 headers, 3000 SS, 4.10 rear. At Norwalk in 2002 it ran 10.91 launching at 1200 on 3-yr old slicks. When he got some new slicks in 2003, it stripped out the splines on his axles. Yet it goes on the streets almost every day.
I seem to have no trouble with the 288/296R when using 1.6 rockers, and I would think 1.7s would be OK too. If anything, I would run the valve lash a little tight, say at .018"-.020".
I put a SB288/296R9 in a 383 with 195AFRs around Dec, 2002. In talking to the buyer last November, he told me the 1st hard launch spun the rims inside the wheels.......
Let me know what is a 'streetable' valve lift.
BTW, I have a UR-43 that is 290 at .020, 254 at .050, 174 at .200, and the same lift as the 288R, .4176" at the lobe, and .626", 1.5s, .668", 1.6s, .710",1.7s. It is very easy on the parts, and is a 'little' softer than the 304, which won the 24 Hours of Daytona. I have it in a twin-turbo charged 384cid Olds dragster. It turns well over 9000, and has so far been 'blowing' through the converter. He's getting a much longer frame, and I'm spreading the LSA a little for a wider range.
A BB290/300R8 would be 254/264 at .050, 174/185 at .200, .710/.710 valve lift, and of course 108 LSA..... And VERRRRY easy on the valve train.

UDHarold

I would think that you would have to have only the best Severe Duty valves to run that Comp cam. Can you imagine the spring pressure needed to run that cam??!! :eek:

Harold,

How much spring does each of those cams take?

.630, .660, .685, .710?

Since all of the lobes are a few degrees apart,how much does going up in the lift affect the power peak on BBC's?

Originally posted by UDHarold:
Chris,

Hey, I wrote that ad myself! I liked it, in my style....
What is a 'street-friendly' lift? I have that 286/296 with .685/.680 lift, and the intake certainly is just a lower-lift version of the 288, 286=R9, 288=R10. Below .065" cam lift they are identical(except for the 2°). How about .645"-.650"?, about .625' net lift. I have some new 'Xtreme-Killers' designed, to be made later this year, but they have .663" gross lift.
As far as reliability, I have been using the 288296R6and R9 as daily-drivers for about 20 years, if you like 500+ HP engines. I have a Olds driver on RealOldsPower with a 455 Olds+060 in a 64 Olds 442 at 3670 lbs. It is 9.8:1 CR, 1 7/8 headers, 3000 SS, 4.10 rear. At Norwalk in 2002 it ran 10.91 launching at 1200 on 3-yr old slicks. When he got some new slicks in 2003, it stripped out the splines on his axles. Yet it goes on the streets almost every day.
I seem to have no trouble with the 288/296R when using 1.6 rockers, and I would think 1.7s would be OK too. If anything, I would run the valve lash a little tight, say at .018"-.020".
I put a SB288/296R9 in a 383 with 195AFRs around Dec, 2002. In talking to the buyer last November, he told me the 1st hard launch spun the rims inside the wheels.......
Let me know what is a 'streetable' valve lift.
BTW, I have a UR-43 that is 290 at .020, 254 at .050, 174 at .200, and the same lift as the 288R, .4176" at the lobe, and .626", 1.5s, .668", 1.6s, .710",1.7s. It is very easy on the parts, and is a 'little' softer than the 304, which won the 24 Hours of Daytona. I have it in a twin-turbo charged 384cid Olds dragster. It turns well over 9000, and has so far been 'blowing' through the converter. He's getting a much longer frame, and I'm spreading the LSA a little for a wider range.
A BB290/300R8 would be 254/264 at .050, 174/185 at .200, .710/.710 valve lift, and of course 108 LSA..... And VERRRRY easy on the valve train.

UDHarold Harold, I guess what I am getting at is I don`t want to be changing springs every year or breaking them, Ever! Do you think my current 99893`s will do the job?

Would it be worth the expense to run the roller instead of the new 288/296F7?

Other than roller rockers, what else will I need to change to run a roller?

Thanks!