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And on the topic of the 695 hp 502 6100/6200 peak w open dry headers (and virtually no decay in power at 6300, bsfcs didnt get ugly until 6300+), 5800/5900 with mufflers and 5700 ish with the EMIS. Top end numbers on dyno looked excellent on this, I had hoped to see 640/650 ft lbs tq (9.8-1 w Oval ports and mini tunnel ram) but saw in the 630s in open headers trim, 620s muffled and 618/620 w Emis. In the boat (A real HEAVY POS Envision) motor feels like a turd in mid range. IF I was doing it over, I would have spent my customers money on a 4.25 crankshaft fwiw, torque moves things, Smitty
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https://cimg1.ibsrv.net/gimg/www.off...1d9b7a5ee2.jpg
The boat the 509 went in needed to be dragged to a landfill and crushed but heres a pic. |
Thanks for the info smitty |
Awesome info !
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Originally Posted by Full Force
(Post 4712463)
just mentioned what we had discussed with my builds that’s all, there are other options always, I am not sure the hassle with huge manifolds are worth the gains, a buddy has them and with the sudden loss of impeller 2 burned up in seconds of no water, at collector..and says they are hard to get around when wrenching.. I can work with my supply base to get some costs in stainless and aluminum. |
Yup. The Diamond Performace/KE Thunder-N-Lightning have 1 3/4"x 34" pirmary runners. Collectors are 4" and you make the collector length.:)Collector length starts on the Diamond marine/KE's where from where tail bolts to manifold and then ends on outside end of transom exhaust tip., Most marine 502's-540's want 18-20"collector lengths.
http://www.diamondperformanceparts.c...age=1&featured See Diamond Marine pic under this dimension info. Here is Pipemax on a 502 i entered with a Crane 741 cam and 5800rpm max rpmpower. --- Single Primary Pipe Specs --- for 502.176 CID from 3800 to 6300 RPM Diameter= 1.899 to 2.024 Length= 33.7 to 36.7 inches long --- 2-Step Primary Pipe Specs --- 1st Dia. inches= 1.899 Length= 16.9 to 18.4 2nd Dia. inches= 2.024 Length= 16.9 to 18.4 --- 3-Step Primary Pipe Specs --- 1st Dia. inches= 1.899 Length= 16.9 to 18.4 2nd Dia. inches= 2.024 Length= 8.4 to 9.2 3rd Dia. inches= 2.149 Length= 8.4 to 9.2 --- Header Collector Specs (Conventional Straight Tube) --- Diameter= 3.466 to 3.716 Tuned Lengths= 19.4 best and also 9.7 or 38.8 --- Header Collector Specs (Megaphone or Diffuser Cone Shape) --- Diameter= 2.966 taper to 3.966 Megaphone/Diffuser Length= 19.4 inches Best HP/TQ Tuned Collector Lengths= 19.4 , 38.8 , 77.6 , 155.2 inches long Worst HP/TQ Loss Collector Lengths= 29.1 , 58.2 , 116.4 , 232.8 inches long Note-> all Pipe Diameters are OD and based-off .0625 inch Pipe thickness ---- Primary Pipe's Harmonics ---- 1st Harmonic = 149.4 inches long ... typically never used 2nd Harmonic = 56.5 inches long ... longest recommended 3rd Harmonic = 33.7 inches long ... highly recommended , best Torque Curve 4th Harmonic = 23.4 inches long ... shortest recommended 5th Harmonic = 17.5 inches long ... typically never used 6th Harmonic = 13.8 inches long ... typically never used 7th Harmonic = 11.1 inches long ... typically never used 8th Harmonic = 9.2 inches long ... typically never used ---- Collector's Harmonics (includes Intermediate, Muffler , TailPipe) ---- 1st Harmonic = 155.2 inches long ... longest with Mufflers and TailPipes Note: Worst = 116.4 inches long for HP/TQ Loss 2nd Harmonic = 77.6 inches long ... longest recommended with Mufflers Note: Worst = 58.2 inches long for HP/TQ Loss 3rd Harmonic = 38.8 inches long ... more bottom-end Torque Note: Worst = 29.1 inches long for HP/TQ Loss 4th Harmonic = 19.4 inches long ... highly recommended , best Torque Curve 5th Harmonic = 9.7 inches long ... reduced Torque , more top-end HP sometimes 6th Harmonic = 4.9 inches long ... reduced Torque , not recommended https://cimg5.ibsrv.net/gimg/www.off...c79bdce6ca.jpg |
smitty - does anyone make a manifold like that for a tall deck. I have EFI and would love to go to a tunnel ram style manifold. I am going to try adding twin turbos this winter and I think that would work great and look good also.
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Originally Posted by Tinkerer
(Post 4712815)
smitty - does anyone make a manifold like that for a tall deck. I have EFI and would love to go to a tunnel ram style manifold. I am going to try adding twin turbos this winter and I think that would work great and look good also.
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Originally Posted by articfriends
(Post 4712854)
Aside from the big $$$ ones that are pretty much custom built (CFE/ICEMAN/HOGAN), not that I know of. Even for this project, I wish there had been something with longer runners, bigger plenum, bigger throttle body mounting. I will say, this one was a like new, used oval port intake I bought on Ebay because Edelbrock discontinued making the oval port 5 years ago (this whole build revolved around trying a set of 300 cc oval ports from AFR). My hp/tq goal was 640/640, I came up slightly short on tq and as mentioned exceeded my hp goal by 40+ which is rare. Between THAT and the BSFC being real nice to 6300 I liked this intake so much I bought a square port version of it to try on dyno with some other stuff I have brewing (a 13-1/12.8-1 515 or 522) that IF I like the results on, I will duplicate and stick in my 33AVS. When the Rectangle port version showed up (NIB) , it has about 3/4 to 1" longer runners, what appears to be a slightly bigger plenum and better TB mounting surface with dual patterns so Im excited to see how it works when I get to this project, Smitty
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Originally Posted by hogie roll
(Post 4712895)
Nice. 100LL or E85? |
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