Team Camaro Tech banner

1 - 14 of 14 Posts

·
Registered
Joined
·
396 Posts
Discussion Starter #1
Guy' there was post a while back about a Rod mag which used a roller cam in a 327 engine and was able to get 420 hp out of it. This got me thinking, if I could get me 327 into this territory, so I did a little studying with DD and here's whatI found. I was using a 383 as the comparison because this was the engine I was considering switching to.

A 327 with a Crane 260 roller cam produces 383 HP at 5,500 and 412 TQ at 4,000. A 383 with a Crane 272 hydraulic cam produces 381 HP at 5,500 and 416 TQ at 4,000.

I chose these two cams because based on research, on this site, these seem to be the best street cams for the two engines chosen. Although some think a 282 cam might a little beter for the 383, but gives up a little torque at the bottom.

This makes me rethink the 383 swap. However it would run about $700 to put in this roller cam.
 

·
Registered
Joined
·
396 Posts
Discussion Starter #3
I put a Comp 280H in and here are the numbers. 376 HP at 5,500 and 415 TQ at 4,000. Pretty much the same numbers as the Crane 272

I think the R is a roller cam and I didn't have the numbers for it, but I'm sure it would have the same level of jump on the 383 that the roller did on the 327.

I guess the bottom line for me is this. A new 383 short block cost around $1,000 or a roller cam for the 327 cost $700. Both produce about the same HP and TQ. Interesting!
 

·
Retired
Joined
·
26,647 Posts
Can you post the spec's on your 2 builds? I ask because even a moddist build of a 383 should get you about 450 - 475 ft lbs of torque and hp in the 380 - 425 range. I'm not taking a shot at the 327 by this but without rev'n it to 6500 or higher I don't see how it could make that kind of torque and compare to the 383 at the same rpm...

------------------
...Dennis
"The '69, the '96 & the club"
 

·
Registered
Joined
·
3,692 Posts
They might make similar peak numbers, but in normal street rpm levels, the extra torque of the 383 would be much, much stronger than the 327. I have nothing against 327's...its just the laws of physics at work here.
 

·
Registered
Joined
·
396 Posts
Discussion Starter #6
Travis I was skeptical too, that's why I used the 383 as a comparison. The 2,000 RPM TQ numbers are: 383 381 and 327 374. Like you said it's what's down low which matters on the street.

I know DD is not always the best way to anaylize this, but check out the March issue of Rod and Custom. It varifies the results with an actual Dyno run. With Cammel humps, Performer intake, Demon 750 Carb, and a Comp Cams 282 roller they get 392 lb of TQ at 4,500 and 396 HP at 6,000. This is basically what DD shows but I used a cam which produces the TQ and HP lower in the RPM.

As far as the combo I used, I tried to keep all the stuff the same except the cam, to try and get an apples to apples comparison. It was 9.5 CR, 750 carb, small tube headers with mufflers, 2.02 and 1.6 valves and then the appropriate cam profiles from the web sites.

Guy's I have no loyalty to the 327 but these dyno runs in Rod and Custom are something to think about.
 

·
Registered
Joined
·
3,692 Posts
I have tried repeatedly tonight to respond to this...but keep timing out


I know DD says that the 327 made 374 ft-lbs at 2000 rpms, but in real life, very few engines can make that kind of low end grunt...especially those with 3.25" strokes. I could believe it with a small cam in a 383, just not the 327. A buddy of mines brother built a 9.5-1 383 for his '72 chevy truck...ported 1.94/1.50 double hump heads, 216/[email protected] crane cam (272 HMV), performer intake, q-jet, and 1 5/8" headers. With a stock torque convertor and posi 3.08 rear end, it would fry the 275/60-15's at anything under 45 mph. A torque beast for sure!
 

·
Registered
Joined
·
3,101 Posts
something doesn't sound right about those numbers.
 

·
Registered
Joined
·
396 Posts
Discussion Starter #9
Travis, I know it doesn't sound right but check out the actual Dyno runs in Rod and Custom. They quote the same low end torque numbers. I ran the same combinations they used in DD and got the same numbers as the actual Dyno runs.
 

·
Registered
Joined
·
8,097 Posts
Rick, My friend has a 327 in his 69 and I have a 383 in my 68. We go head to head all the time and I beat him time after time. We both have similar HP numbers and similar builds. He even has deeper gears and a 4000 stall to make up for the torque diff, not to mention he is running a full point more compression than me.

The 327 is a great motor, I'm not knocking it - but there is no replacement for displacement, regardless of what all the freakin' magazines and Desktop Dyno numbers tell you!

------------------
68 Camaro, 383 small block with TH350 trans. 11.98's at 111mph and never trailered.
 

·
Registered
Joined
·
1,071 Posts
I have been planning on bulding a 383 this summer and the numbers coume up with on the Destop dyno are alot better here is the set up.. AFR 195's 10.3-1 comp. Dulplaine manifold, CompCams Extreame energy Rooler XR282 The Cam has 230* intake and 236* exhaust with a 510in thake an 530ex lift using 1.5 rockers. For exhaust I wentwith the lrge tube headers with mufflrs since I plan on running a 1 3/4 primary. I also went with the 750 carb. THe totaly for the combo 469 hp @5500 and 491 lbs @4000. The coolest thing about the motor is that it makes over 420 lbs of torque from 2000-6000!

------------------
69 Camaro RS, 355ci, 71 gm heads 74cc 1.72in 1.50ex,mild cam, Preformer rpm intake, edelbrock 600 carb, 350 turbo w/ shift kit 2500 stall, 12 bolt 4.56 posi..
 

·
Registered
Joined
·
396 Posts
Discussion Starter #12
Eric, I'm sure your 383 beats your friends 327. My question is, would you beat it with the cam in question. Does your friend have the roller cam we are talking about.
 

·
Registered
Joined
·
91 Posts
The 327 is a great motor, I'm not knocking it - but there is no replacement for displacement, regardless of what all the freakin' magazines and Desktop Dyno numbers tell you!

diffently agree with that
 

·
Registered
Joined
·
7,159 Posts
Not really helping out what you want to know but.......If you have a 68 327 they are of the large journal varity and can be stroked to 383. If your a matching numbers kinda guy all you numbers and markings would say 327 but the internals would be 383. The only givaway to it would be the 400 balancer. it would be very cool to have a numbers matching small block 327 Camaro with a stroker under the hood!!!!! YEEEE HAAAAA!!! Let's Burn some Rubber!!!!!!!!!

Joe
 
1 - 14 of 14 Posts
Top