oregonsharkman

I just thought I would post a follow up to my previous engine build/startup thread. I have been amazed at the streetability of my new motor!!! I was worried that my fairly stout roller cam would not react to well to my 4-speed/3.08 combo. (my last motor---383 with flat tappet hydraulic cam ~226/228 @.050 .490/.510 lift needed 2500+rpm to leave a stoplight )



So here are the engine specs:

-350 4-bolt 010 block bored .030 over, clearanced for 3.75" stroke, decked, and line honed running @ 10.9:1 CR
- eagle forged steel 3.75" crank
- gmpp forged 5.7" rods
- kb hyper -5cc flat top pistons
- comp 286HR Hydraulic roller retrofit cam and lifters
- scorpion 1.5 roller rockers.
- Comp Hi-tech custom length pushrods
- Manley Dual valve springs setup for 286HR pressure
- 7/16" rocker studs with guide plates
- ARP main stud kit with windage tray extension
- milodon low-pro 7 quart oil pan with HV55 pump and windage tray
- RPM aluminum heads with a full competition port/polish/valve job by Louthan competition heads ($1000 of head work).
- cloyes quick button timing cover/cam button
-rpm aluminum intake
-edel. performer 750 carb
-ceramic coat headers (1 5/8")>2.5" true duals with Flowmaster 40's

I guess I am probably running close to <500hp at the crank.

So to sum it up: If you are thinking about retrofitting your motor with a hydraulic roller cam.....Do it You will not regret it.

My 383 idles like a pro mod car, idles @ 750 rpm, runs cool at 180 degrees in 90F+ weather, and pulls hard from 1200 rpm to 6200 (rev limiter)----no float, no funk.......

Sound Clip Here:::http://home.comcast.net/~donjgraham/...oker_Motor.mp3

Eddie 70

Nice deep sound. Sounds like you have made yourself a nice street motor. I love the sound of it. What exhaust setup are you running?

MotorHead

I have been eyeing that cam for some time now, if I ever have to change out my solid roller for whatever reason. Roller cams are here to stay and your writeup is a prime example of why they have become so popular. I can let the clutch out on mine at idle and it will go 15mph. Mine putts around like a stock motor ( except the idle is a giveaway ) untill you hit the gas, then hold on tight

weimer20

With the c/r at 10.9 - 1, what gas are you using?? I'm getting ready to build my 350 and was gonna use the same cam. I'm gonna use aluminum heads as well so I'm really curious how much compression I can build into this without having the detonation prob.. Highest octane I can get at a pump here in Calif is 91. Your car sounds great. Gotta love Flowmasters!

MotorHead

You don't need 11:1CR with that cam, 10:1 cr will do the DCR is fine at that level

gkull

My 383 has 11.2 C/R with a 236/242 112 lc roller cam 1.65 rockers and runs fine on CA 91. It had bad detonation with 232/240 112 lc roller cam

MotorHead

I think this cam is even smaller in duration 230/230 so it only needs 10:1 CR

oregonsharkman

1 5/8" ceramic coated headers thru 2.5" custom duals into Flowmaster 40's

I am now a true believer...I hesitated to spend the ~$1000 to retrofit the hyd. roller....but I am SO glad I did...NO COMPARISON to a flat tappet motor.

I am running on 92 Super for cruisin' around town, but if I plan to really get on it I try to put about 2-3 gallons of 110 racing gas with 10 gal super, just so I KNOW I don't have to worry about detonation.

MYBAD79

That's less cam than I have with only 9.8:1 CR. With 11:1 CR you can run a lot more cam
Gbak just installed a 242-248 solid roller in his 11:1 383ci engine... he posted a video not too long ago... pretty impressive sound and power...

with your 230-230 cam you should have more low end power. Mine is a 230-236 on 112LS.... roller cams are

MotorHead

This cam is impressive, .570" lift with 1.6 rockers puts you over .600" with only 230 duation. It is alot more radical than many of the solid street rollers out there. I am only at ~ .615" lift with 242/248 duration

2000FRCZ19

my motor is almost finished and i went with crower #00471 hyd roller. with 1.6 rockers it has .592 lift on the intake and close to .600 on exhaust. it has a duration of 236 / 240 at .050. we will see how it does in a few weeks on the dyno. glad to see everyone is happy with the hyd rollers.

gkull

You really need to get nice heads flowing at their max for the most amount of time. I used to run only 1.65 intake and 1.6 ex. to end up with .620/620 in my 383. Then I said go for the gusto and went custom....

My 434 needs all it can get. Just like you Motorhead.

(248/250 endurance road racing solid roller with .685/.714 lift 110 LSA)using 1.65 intake and 1.7 roller rockers,

My original 427 ci had the comp cams 242/248 110 with 1,65. It was really pretty nice. I really considered another 112 lc

RATT7

Sounds really nice !

Edzred72

I will be watching you I went with the Crower 230-236 Hydro roller just below yours, but have had NO time to finish the install. You'll probably fire yours before I do.
Anxiously waiting....
POWER BY CROWER
Eddie

piper.gras

The 286HR is a nice cam, just put one in a 383. My compression is a little lower than yours, somewhere between 9.6:1 and 9.8:1. Engine dyno'd at 450HP and 470 lb-ft.

68 NJConv 454

Awsome sound. Sounds like its ready to take off.

weimer20

Thanks for the info on that, I appreciate being able to come to this forum for all the experience that is here. You can almost always find someone who has covered the same ground that you are about to and it really helps to eliminate the "second guessing" that I invariably go through when putting another motor together. This just opens the door to trying something new. Thanks all!