427 sbc dyno article
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,724
Likes: 16
From: Little Elm TX
427 sbc dyno article
The below is a link to an article on a 427 sbc utilizing Brodix Race-Rite cylinder heads and a fairly mild hyd roller cam with 234/238 @ .050" - .574/.584 w/ 1.6's lift.
I know one or two of you were considering a set-up similar to this, thus thought I would share......
http://www.compcams.com/Community/Ar...ID=-1809691628
Make what you want of it....
I know one or two of you were considering a set-up similar to this, thus thought I would share......
http://www.compcams.com/Community/Ar...ID=-1809691628
Make what you want of it....
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Holy crap, that's with the Race Rite 180 heads, those pieces of crap. That's what I have on my 350. Actually, I can't believe the RR 180s are making 515 HP. That right there is pretty dam impressive.
With the mini ram and larger heads, and a similar cam, and a dead on ***** tune I should not be surprised to see 550 at the crank, 575 isn't out of the question. Expecting 35 HP out of the heads is completely reasonable, probably more like 50. Another few for the tune and intake, I think getting to 575 is realistic.
I don't think those numbers are too shabby considering the intake and heads are a bit light for that motor.
My .02
Anyone think I'm out of my mind? If I can get 550 CHP 450 RWHP should be achievable what do you think. So again, am I nuts?
With the mini ram and larger heads, and a similar cam, and a dead on ***** tune I should not be surprised to see 550 at the crank, 575 isn't out of the question. Expecting 35 HP out of the heads is completely reasonable, probably more like 50. Another few for the tune and intake, I think getting to 575 is realistic.
I don't think those numbers are too shabby considering the intake and heads are a bit light for that motor.
My .02
Anyone think I'm out of my mind? If I can get 550 CHP 450 RWHP should be achievable what do you think. So again, am I nuts?
Last edited by jsup; Aug 10, 2008 at 08:16 PM.
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
One more time to beat the dead horse, those are incredible numbers for those heads. WAAYY more than I would have expected. Crazy.
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,724
Likes: 16
From: Little Elm TX
They do not really surprise me, those numbers are awful low for a big cube motor..... they are held back a little bit by the cam and quite a bit by the cylinder heads. As a note, the 420 cubic inch motor that LPE advertised for many years with a Brodix Track 1's, Superram and just the 219 cam are below..... very similar to that article above.....
RPM TQ HP
2000 435 165
2500 470 225
3000 520 300
3500 545 365
4000 560 420
4400 561 480
5000 535 502
5200 507 509
5500 475 490
As per a thread from a few weeks ago, the below link is more along the lines of what these motors should be making.
http://forums.corvetteforum.com/show....php?t=2085063
RPM TQ HP
2000 435 165
2500 470 225
3000 520 300
3500 545 365
4000 560 420
4400 561 480
5000 535 502
5200 507 509
5500 475 490
As per a thread from a few weeks ago, the below link is more along the lines of what these motors should be making.
http://forums.corvetteforum.com/show....php?t=2085063
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Holy crap, that's with the Race Rite 180 heads, those pieces of crap. That's what I have on my 350. Actually, I can't believe the RR 180s are making 515 HP. That right there is pretty dam impressive.
With the mini ram and larger heads, and a similar cam, and a dead on ***** tune I should not be surprised to see 550 at the crank, 575 isn't out of the question. Expecting 35 HP out of the heads is completely reasonable, probably more like 50. Another few for the tune and intake, I think getting to 575 is realistic.
I don't think those numbers are too shabby considering the intake and heads are a bit light for that motor.
My .02
Anyone think I'm out of my mind? If I can get 550 CHP 450 RWHP should be achievable what do you think. So again, am I nuts?
With the mini ram and larger heads, and a similar cam, and a dead on ***** tune I should not be surprised to see 550 at the crank, 575 isn't out of the question. Expecting 35 HP out of the heads is completely reasonable, probably more like 50. Another few for the tune and intake, I think getting to 575 is realistic.
I don't think those numbers are too shabby considering the intake and heads are a bit light for that motor.
My .02
Anyone think I'm out of my mind? If I can get 550 CHP 450 RWHP should be achievable what do you think. So again, am I nuts?
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Brodix -10X or -11X....those put up some killer flow numbers
But that aside, I have to reiterate, those numbers for 180CC head are amazing.
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Holy crap, that's with the Race Rite 180 heads, those pieces of crap. That's what I have on my 350. Actually, I can't believe the RR 180s are making 515 HP. That right there is pretty dam impressive.
With the mini ram and larger heads, and a similar cam, and a dead on ***** tune I should not be surprised to see 550 at the crank, 575 isn't out of the question. Expecting 35 HP out of the heads is completely reasonable, probably more like 50. Another few for the tune and intake, I think getting to 575 is realistic.
I don't think those numbers are too shabby considering the intake and heads are a bit light for that motor.
My .02
Anyone think I'm out of my mind? If I can get 550 CHP 450 RWHP should be achievable what do you think. So again, am I nuts?
With the mini ram and larger heads, and a similar cam, and a dead on ***** tune I should not be surprised to see 550 at the crank, 575 isn't out of the question. Expecting 35 HP out of the heads is completely reasonable, probably more like 50. Another few for the tune and intake, I think getting to 575 is realistic.
I don't think those numbers are too shabby considering the intake and heads are a bit light for that motor.
My .02
Anyone think I'm out of my mind? If I can get 550 CHP 450 RWHP should be achievable what do you think. So again, am I nuts?
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
I personally would of liked to see that motor with a set of the AFR 195cc Competition ports. I hear they flow 300+cfm at .600 lift with such a small port. Would of been curious of the hp gains with better flowing heads.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
I am interested in your heads. The part I am interested in is after they port them. Are you going to find out what size the ports are, and what they flow after you spend a few bucks on them?
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
They are $1500 new and ported.
So 80% of 575 is 460. It will be close.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Don't do it for me. I really dont care that much actually. If it was me, I would want them flowed before and after. This way you can see the difference in port velocity.
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Very little has to come out so I don't expect it to vary much from the original. Mostly cleaning up the bowls.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Remember it's not about peak hp, it's about the power under the curve. Not only will it be interesting to compare our dyno curves, but it will be interested to compare our mph when we both hit the track. I dont really care too much about e.t's, as that means breaking stuff.
You are going with a bigger cam, and bigger heads then myself. If my motor can perform just as well, the proof is in the pudding in regards to my small cylinder heads.