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#1
03-19-2017, 08:40 AM
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400 dyno results
I have a .060 over 400 with factory crank, Eagle rods, Icon Pistons. It's topped off with SD Performance KRE 295 heads and their ported factory intake with a q jet tuned by Cliff. I was running a hydraulic roller with 1.5 rockers. While the engine ran good, I was never really impressed. So after following GTOFREAK's 400 build I decided to make a change. I installed the Voodoo HR 231/239 with 1.65 rockers. Off to the dyno I went. After a little distributor tuning, the engine liked 34*. Air/ fuel was right on. The thing that kind of surprised me was that it made peak HP at 5400. I would have thought it would have been 400-500 rpm higher. Do you guys think that's where it should have peaked or should I be looking for something holding it back? Also it was run with a fuel pump and alt installed so that took a few ponies off , dyno operator guesses another 15-20hp with those off. As a side note, they had Cliff's Qjet book on the bench and thought it would be fun to see how close he got the tune. They were impressed.
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#2
03-19-2017, 08:43 AM
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This is a little hard to see
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#3
03-19-2017, 08:46 AM
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Nice numbers. The little 400 is a beast! Where is cam degreed?
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded) '69 LeMans Vert, 350, #47 heads: Non-running project |
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#4
03-19-2017, 08:58 AM
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It degreed at 103* as recommend by GTOFREAK.
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#5
03-19-2017, 09:09 AM
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Quote:
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Let's make welfare as hard to get as Veterans benefits! Last edited by redhawk44; 03-19-2017 at 09:11 AM. Reason: What carb was used before |
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#6
03-19-2017, 09:20 AM
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The carb is not changed, just cam and rockers. I have no numbers with the other cam, wish I did.
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#7
03-19-2017, 09:24 AM
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Nice numbers. I see you swapped out the stump puller for the voodoo, is that right?
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#8
03-19-2017, 09:36 AM
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Nice numbers, tq is up there for a 400 too. Imo it's peaking a hair early but that's most likely due to the amount of advance in the cam. It would have been nice to see what the engine did a little higher up in the rpm range to see if it hangs on good or falls off quickly.
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#9
03-19-2017, 09:39 AM
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Good job!
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#10
03-19-2017, 10:22 AM
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Headers? Compression ratio?
I'd really like to see numbers with a port matched Torker 2 intake. The cam and heads are capable of more (even at 103 centerline). Some dyno's are very conservative. |
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#11
03-19-2017, 10:29 AM
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Headers and comp ratio is 10.4
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#12
03-19-2017, 10:33 AM
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Quote:
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#13
03-19-2017, 10:35 AM
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A few months ago I suggested a similar cam for another 400 build.
The OP wanted to moderate his combo, I targeted 5700 / 5800 RPM peak. http://forums.maxperformanceinc.com/...7&postcount=20 |
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#14
03-19-2017, 10:49 AM
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Quote:
The "ported factory" did just slightly better there. A Victor pushed it up to 500HP, but dropped torque down low too much. IMO a Torker 2 would be a great match. http://forums.maxperformanceinc.com/...=795059&page=6 (KRE 295 will RPM even better) |
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#15
03-19-2017, 11:11 AM
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Very impressive numbers!
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#16
03-19-2017, 11:12 AM
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I would have liked to try another intake but this is all I have. I know the heads are not the restriction.
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#17
03-19-2017, 11:14 AM
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Wow
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#18
03-19-2017, 11:47 AM
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On the 413 I tested, the unported intake made peak power at 5300, and dropped off pretty quickly after that. When we tested the ported iron intake, it still peaked at 5300, but carried that same power out to 5900. They should have pulled it to 6000 to see what it did up there.Either way, nice job, it should be a beast on the street.
What exhaust is on it? What gears are you going to run in it?
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
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#19
03-19-2017, 11:56 AM
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I have 1 3/4" headers into 2.5" pipes. I also have a X pipe I may install. Also running a 2004r trans into a 3.73 rear gear. For the dyno test, we used their headers because they had the o2 fitting. I think they were 1 5/8 primary
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#20
03-19-2017, 12:03 PM
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Another thing to add is that idle vacuum was up around 17-18 although the idle may have been a little high at that point when I looked at the vacuum
Last edited by max 93; 03-19-2017 at 12:10 PM. |
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