Re: 430" small block build
[Re: justinp61]
#912905
07/26/12 08:53 AM
07/26/12 08:53 AM
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Joined: Aug 2003
Posts: 11,179 Atco NJ
DJVCuda
OP
I Live Here
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OP
I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Quote:
Are you going to dyno it with the small tube headers and no other changes? It would be intresting to see how much they would hold it back. Heck, I'd like to see a set of straight 1 7/8" or a 1 7/8" step to 2" to see how it responds.
yes - i was planning on going from the small stuff, to big, but just went right to the top - will make a few other changes before we start swapping to the small tube headers -
also - we went from 1.19 hp/cu with the stockers, air gap and small headers to 1.49 with the MCH's SVC & big headers...
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Re: 430" small block build
[Re: DJVCuda]
#912906
07/26/12 10:15 AM
07/26/12 10:15 AM
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Joined: Jan 2007
Posts: 3,695 nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
yes 6.5's
Annular or dog leg?
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Re: 430" small block build
[Re: DJVCuda]
#912908
07/26/12 11:25 AM
07/26/12 11:25 AM
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Joined: Jan 2007
Posts: 3,695 nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
annular i believe
From the jetting it sounds more like a dog leg booster?
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Re: 430" small block build
[Re: DJVCuda]
#912910
07/27/12 12:42 PM
07/27/12 12:42 PM
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Joined: Aug 2003
Posts: 11,179 Atco NJ
DJVCuda
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I Live Here
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OP
I Live Here
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Posts: 11,179
Atco NJ
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TEAL - Stock Eddy Head, Air Gap, 1 5/8" headers & small cam PINK - SDSS Heads, Victor 340, 1 5/8" headers & small cam WHITE - MCH Heads, Super Vitcor, 1 3/4 to 1 7/8" step headers, & big cam interesting to see the graph - the torque really moves up and down the RPM range, but stays at the same level.
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Re: 430" small block build
[Re: DJVCuda]
#912911
07/27/12 07:41 PM
07/27/12 07:41 PM
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Joined: Oct 2008
Posts: 458 Michigan
BPE
mopar
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mopar
Joined: Oct 2008
Posts: 458
Michigan
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That's awesome, now you have shown us "Gay Graph" #2. Just kidding, it's nice to see an overlay on the pulls. It shows a good comparison from a street setup to a race application. Dave, I would like to commend you for the outstanding photos and overall job you have done. I am proud to tell people that I had some part in this build and the way you went about it shows a great attention to detail. And for that sir, I thank you. Rod
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Re: 430" small block build
[Re: BPE]
#912912
07/28/12 10:22 PM
07/28/12 10:22 PM
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Joined: Aug 2003
Posts: 11,179 Atco NJ
DJVCuda
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I Live Here
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OP
I Live Here
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Posts: 11,179
Atco NJ
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Thanks Rod - I knew you would come around on the graphs...lol I spent today changing the oil, cutting the filter, and running the valves....Looks good and all the rockers didnt need adjustment. Took readings on cranking PSI on all cylinders - the small cam was 145 - 150 range - the big one is in the 135-140 range - i guess the overlap really take a chunk of cranking compression out. Ran a leakdown test as well - we were in the 5-6% range on all cylinders, so we have a healthy 430 ready for more testing! Someone asked about the carb - it has annular boosters - Plugs looked good - timing marks look good...
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Re: 430" small block build
[Re: DJVCuda]
#912915
07/29/12 10:27 PM
07/29/12 10:27 PM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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nice read.
good numbers too.
what sized valves are in the MCH heads?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 430" small block build
[Re: DJVCuda]
#912918
08/03/12 01:07 PM
08/03/12 01:07 PM
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Joined: Jan 2007
Posts: 3,695 nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
Quote:
Is the super vic ported? That pup is makin some power with conservative flow #s and cam
I gasket matched the intake, and also opened up the flange since it had that goofy overlap into it.
All the numbers were low - I'm not sure what caused that but they were all consistently low. The flow sheet from the MCH's add another 10-15 cfm in there and that is from his bench - I believe the test numbers were at 24" on the bench at the shop, but cant confirm that right now. but we did go into this knowing the numbers were low. I figure that since they are all from the same bench you can get a gauge as to how each stacks up against the other under the same conditions.
we had fun today finding hp - started out at 580@ 6500 - was way lean - needed to jet up ( was at 82 & 86 ) and timing was at 30 ( where the other 2 heads liked it AFR was in the high 13's and low 14's - -
next pull had jetted up to 84 & 88 - made 609 @ 6500 - still was lean - about 13.8:1 - gettin there!
Last run of the day was 34 degrees timing and 88's and 90's - thats when we hit 12.5 afr and 627 @6500
Any chance you recorded the high speed air bleeds
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Re: 430" small block build
[Re: DJVCuda]
#912920
12/15/12 12:03 PM
12/15/12 12:03 PM
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Joined: Apr 2009
Posts: 3,412 Toronto
mshred
master
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master
Joined: Apr 2009
Posts: 3,412
Toronto
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Dave you did a real awesome job with this engine man! I have been following along, and I have to say your attention to detail is great! I always put my engines together slowly like this too, mainly due to time...sometimes wish I could get it done faster, but when you take time to check EVERYTHING its worth it, and your results and work just remind me that its the best way to go. Very B@DA#% motor! Makes me excited to see what my next one will put out
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