63mako

Well assembly of the new motor is finally happening. Short block is assembled. 1973 L82 4 bolt Block, Billet caps, ARP studs, Align bored, Bored 30 over, Torque plate honed, zero decked, clearanced for 3.75 4340 forged crank. Rotating assembly. Eagle crank forging machined and lightened by AMS balanced on Sunnen crankshaft balancer. Final bobweight 1685. King accular bearings. Callies Comp Star H beam rods with 7/16 ARP 2000 full thread engagement cap bolts. Mahle grafel coated forged floating flat top pistons, Mahle file fit ring pack. Custom grind Comp Cams Hydraulic roller XE 288 HR with 114 LSA and 4 degree intake advance ground in. Pictures

yellow 72

Very nice

CA-Legal-Vette

Looks great.

Did you use blue Locktite on the cap stud nuts or is that just glare from the flash?

gkull

I'm very interested in how your 236/242 runs. How did you arrive at 4 degrees advance and 114.

My 383 has the XE274R custom billet 236/242 112 LSA ground 4 degrees retarded. To get my .620 lift I used 1.65 intake and 1.6 exhaust rockers. It is about the max cam I would use in a 383. I aught to retard my cam 4 degrees and try it out. It seems to me that all my DD2000 inputs pointed towards retarding the cam.

2000FRCZ19

i am very interested in hearing also. i have a similar cam planned for my 396 except i am going hyd roller 236 240 and 286adv. 292adv. on a 110. lift is right at .600 with the 1.6's. i really hope yours turns out great. looks good so far.

63mako

It was all about street manners, matching my intended use and torque curve. With the HR I won't be pushing the RPM's. 6500 max. My trans is an Autogear M22 and a 4.11 gear.I am only at a 9 to 1 ratio in first. Wanted some grunt at the bottom. The 4 degree advance will drop my torque curve. The wide lsa will idle better, take off from a stop sign better and work well with my nitrous. Most nitrous cams are 112 or 114 LSA. I wanted more low end and midrange torque than the stock grind would allow and didn't want to drop my compression and go with a smaller cam to get it. The dyno sim numbers look real good with this setup. 535 HP @ 6000 and 490 Ft lbs @ 4500 with 100% Volumetric efficiency from 4500 to 6000 RPM (nitrous likes that). I could bump both numbers by retarding the cam 4 degrees but that raises my max HP to 6500 and max torque to 5000. The torque curve with this grind is not as high as the 110 LSA but is a lot stronger at the bottom and almost flat. Same reason I went with smaller runner heads that flow well, especially on the exhast side. Better bottom end and works good with the nitrous. The split single plane tripower should pull good from 1500 to 6500 acording to the Manufacturer specs. Tried to build a well balanced combination that will work well as a unit for mostly street use and maximum power from 4000 to 6000 RPM

63mako

ARP assembly lube

2000FRCZ19

would you mind posting all the specs of your cam, i would like to plug it into my dd2000 with my planned set up and compair the tq curve to the cam i have chosen, who knows i might steal yours is it fits my set up better. i think with the 396 i should have a decent bottom end with the crower cam though. i have a th400 with a 2500 to 2800 stall. gears are going to be either 3.70 or 3.90. right now i am looking at 3.90 3500rpms on the highway should be ok with this set up. it will be mostly an around town car anyway. it will see the strip on occasion too. i am going with a single carb on a team g singl plane. either a bg or a q jet i am not sure yet. i will be asking around on that one too.

63mako

Here you go!

SERIAL # A 5444 SPEC CARD # 046354 SPEC CARD INQUIRY BY
SERIAL #
PART # 12-000-8 CS HR/SR ROLLER
CORE C12-8P CS CHEV SML BLK AUSTEMPERED
Special Grind
GRIND # CS 3316S /3317S HR114.0
DURATION @ .050 INTAKE 236 ROCKER
ARM RATIO
VALVE ADJ INTAKE .000 DURATION @ .050 EXHAUST 242
INTAKE 1.50
VALVE ADJ EXHAUST .000 LOBE LIFT INTAKE .3470
EXHAUST 1.50
VALVE LIFT INTAKE .520 LOBE LIFT EXHAUST .3600
VALVE LIFT EXHAUST .540 LOBE SEPARATION 114.0
DURATION .006 INTAKE C/L 110.0
TAPPET LIFT INTAKE 287 CAM ADVANCE 4
TAPPET LIFT EXHAUST 293 HYDRAULIC Y
VALVE TIMING .050 OVERHEAD CAM N
VALVE OPEN INTAKE 8 JOURNAL DIAMETER STD 1.868
VALVE OPEN EXHAUST 59
VALVE CLOSED INTAKE 48
VALVE CLOSED EXHAUST 3 LET ME KNOW HOW IT LOOKS ON THE DD2000!

bobs77vet

looks good!

Edzred72

Mahle's:
Sweet looking bottom there Kev. IT'S ABOUT FRIGGIN TIME IT GOT ASSEMBLED!!!!
Hope all turns out well. You just might beat me to the street after all.
Eddie

63mako

Doubt that! Let me know about dyno day!

2000FRCZ19

very interesting results. your cam had 1 ft lbs more tq at 2000 rpms and at 2500 rpms than mine, but mine came in a little better at 3000 rpms with 441 to your cams 438. not enough to feel. hp was 546 at 6000 rpms with your cam and 549 hp with mine but mine was still at 549 at 6500 while your tapered down a whopping 2 hp. your peak tq was 1 higher then mine at 523 at 5000rpms. looks like both cams are so close that it is scarry. the dif. i think will be in the idle and street maners. yours with the 114 will be a little smoother at idle i would think. i am looking for a little nastyness in my idle so i should stick with the 110 i have been looking at. i might be wrong on this. at least it is nice to know we have very close numbers on my set up with both the cams. i ran it for fun with open headders and it came out to 581 hp. i will be very happy if i end up with 500 to 520 real world hp at the crank. i saved the cam profile so i will print it and scan it back in as a jpeg and send it out to you in a few days. my dcr came in at 8.16486 with a quench of .037. if i change the quench to .039 dcr drops to 8.08***

63mako

Pretty close! I would have thought it would vary more than that especially on the torque line. Figured mine would be lower peak but flatter. Mine has quite a bit less lift and more LSA. Must offset. My other numbers came from a comp cams pro dyno sim and mine is a 383. Originally designed this without desktop dyno help. Looks like I did ok. Add a 150 shot of nitrous to that. Here is what the other program showed for torque with nitrous. 693HP @ 6500 Rpm, 656 ft lbs @ 4500, 679 ft lbs @ 3000 rpm, 840 ft lbs @ 1500. The nitrous window switch will be set at 2800 RPM.

2000FRCZ19

it's crazy how they compaired. it looks like you did very well on the cam design. we end up with alomost the same numbers but yours gets you there in a little more refined way. i was after something streetable but very raw and lumpy. i still wanted a little bottom end out of it so the 396 took car of that. i was tempeted to go really wild and get a solid roller but for my intended use i think that would have been a little more than i wanted. i am just wanting something fun and old school that will out run my z. it is quite a handfull as it is traction limited on the stock rubber at the moment. so if i can get the c-3 to exceed my c-5z i will be very happy. i just picked up a set of jet hot hooker sidepipes with the maxflows so i cant wait to get this thing going so i can hear them sing. i will try the combo with a 150 shot too and see what i get. i am going to be running the new 210 afrs so that may have affected the numbers also.

63mako

I got the Hooker sidepipes with Max Flows too. Great minds think alike. Probably see the difference in the cams with the nitrous. I have heard the 236 242 cam with 110 LSA it is raw and lumpy.

2000FRCZ19

the 150 shot gives me 699 hp @ 6000 and 6500 rpms and tq is at 694 at 4500 rpms and at 3000 it is 704 ft lbs. i would be picking up tranny parts all day. lol i think i will behave and stay gas only.

2000FRCZ19

glad to hear that it is indeed raw and lumpy. this should work out to be a nice combo.

63mako

No replacement for displacement.

gkull

If I were you I would install a true two piece timing cover like the comp cams model. That way you could change the cam degree without removing the oil pan.

Comp cams generally grind in 4 degrees of advance compared to Crane cams. So your 4 advance might be the equivolent to 8.

I figured this out from looking at cam card .050 valve event numbers. Well tuned and put together 383's make so much more TQ than any 350 that it is kind of a moot point to get even more low end. I can see where you are going on the upper rpm limitation though.

I considered 114 on a couple of my custom cams.