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#1
01-09-2011, 02:34 AM
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Another Iron DPort Hot Rod
Dyno’d Milt’s “Medicine Man” Hot Rod today
4.200” 400 block 4.25” stroke Flat top piston 6.800” rod #48 head extensively ported 13:1 compression Victor ported 1” open spacer 950HP CCM alcohol carb M1 fuel 272/280 Solid flat tappet cam 1.65 rockers Heddman headers 2” primary 3.5” flat collectors 18” collector extensions 28 degrees timing Joe Gibbs 10W/30 break in oil Peak power 781 at 6300 RPM Peak Torque 701 at 5300 RPM Its late but I will scan and post the dyno sheet tomorrow. It earned its name “Medicine Man” because of the headaches it gave us. |
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#2
01-09-2011, 02:51 AM
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WOW!!!!
 How much is alcohol/methanol worth over gas?
__________________
PHILLYGOAT 1965 GTO/ OEM Block, Crank & D-ports(all slightly modified of course)/ 3550lbs/ Full Exhaust/ Foot Braking 1.41 60ft 6.45@104.97mph 10.25@127.12mph(Pontiac Heaven)  More Details on GOAT http://www.pontiaczone.com/forum/vbpicgallery.php?do=view&g=379 GTO Burnout http://www.youtube.com/watch?v=nZqdcH0Ltc4 Last edited by GOAT490; 01-09-2011 at 03:18 AM. |
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#3
01-09-2011, 08:54 AM
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nice, looks like it is going in a abody> jim did you sleeve all the cyls in the block?
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#4
01-09-2011, 09:35 AM
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28 degrees timing? That's all? I would think it would want more running methanol.
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Just a blind squirrel looking for a nut. |
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#5
01-09-2011, 09:50 AM
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are those hedman copies or just the ''normal'' 2'' od 30530s? look completely different when new and on a dport! Jim whats your opinion of the flat collector? is it a hp robber?
awesome numbers
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#6
01-09-2011, 12:04 PM
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Goat, Methanol fuel versus gasoline will generate plenty of debate on the torque differences but on this one we did not try any back to back tests to compare. On this engine combination we broke it in on gasoline and made 3 short pulls. Break-in was settling in nicely so we changed over to methanol for the remainder of the tests.
J.C. Block was hand picked from the stash, checked for core shift and grouted but no sleeves. Block is a 1974 model Brian We started at 34 degrees adjusted to 36 then dropped progressively to 28 based on the test results. mystic Headers are out of the box Heddmans (Milt should have the part number) with a few tweaks on the flange to get bolt holes and ports to line up. We were pleasantly surprised they fit the 901 dyno frame. They fit in a 65 GTO with minor work to A frames. Milt can describe exactly what he did. This engine was built for a new 10.5 class called OEM Street. Extensive rule structure but the main factor is stock OEM block, OEM iron heads (restricted list with no performance heads allowed such as HO, SD, SCJ Fords, rectangle port BB Chevys, etc.), solid flat tappet cam, off the shelf parts basically...and a spec Nitrous Kit (+/-200HP jet/solenoid). Mainly trying to keep costs down and participation up. We have small and big Chevys, a 351 Cleveland and now Medicine Man is the HP king. The last BBC made 777HP. Now if we could talk Milt into a 4 Spd. |
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#7
01-09-2011, 12:09 PM
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sounds like a cool class. any links?
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#8
01-09-2011, 12:10 PM
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How about some details on the heads
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#9
01-09-2011, 01:12 PM
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Congratulations!!!
-No roller cam -iron heads -no huge RPM -no vacuum pump That's 100 more HP than expected Bob weight? Head secrets? WOW WOW WOW
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GT37 3625lbs..Fastest bench seat, column shift, all steel,no power adders car at Norwalk 1.35 w/29.5x10.5x15 6.42 @ 109 10.09 @ 133 |
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#10
01-09-2011, 01:21 PM
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Robertson is one of the best, pontiac guys are lucky to have him on the boards
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Car Craft Garage. Automotive Restoration |
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#11
01-09-2011, 02:03 PM
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Quote:
Very nice results! |
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#12
01-09-2011, 02:12 PM
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Are these the 320 cfm 48s ?
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#13
01-09-2011, 03:04 PM
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Great work Jim (as per usual)
Do you think the timing requirements (low) were as a result of the Methanol or possibly the compact chamber (assume minor milling to get to 13:1 ??)
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Working on going faster (and now staying dry at the same time !!) |
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#14
01-09-2011, 06:16 PM
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The team of Milt, Mark and I are responsible for this one...From all of us...Thanks for the kind words.
OEMstreet.com is the website. Quite a few rules to try to keep the richest guy from annihilating the field...We will see who shows up. Hope the economy does not kill it. These are not the #48s pictured on my website. I ported these for Milt a few years ago and tweaked them a bit recently. 45 degree seat on int and exh. Stainless pushrod tube in original location with relatively thin port wall in places. Still looking for flow sheet. Pics attached. The small chambers with minimal surface area seem to like minimal timing. The big chevys ran best at 38 degrees...big piston dome and lots of chamber surface and 25-30 cfm more flow than these heads. Chevys are down on torque compared to this one with similar prep/specifications. |
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#15
01-09-2011, 06:27 PM
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thats a nice looking D port. this is similar to FAST yes? still no paupers. any pics of the car its going into. did it race last year with similar combo? et?
i was just reading the rules sounds pretty neat. anyone claim a motor for 6k? or get factored 100#s?
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction Last edited by mysticmissle; 01-09-2011 at 06:35 PM. |
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#16
01-09-2011, 06:40 PM
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Looks real good Jim. Let us know what it runs. My car is off to paint in a week or so.
Don |
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#17
01-09-2011, 07:48 PM
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Great numbers on that combo with a non roller cam. Oem street class looks interesting only d-ports allowed for Pontiacs. This engine should do well.
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#18
01-09-2011, 08:02 PM
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Congrats on the results! Porting job looks awesome... Keep us posted on your projects.
Kris
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*** THE BIG BRACE is here *** |
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#19
01-09-2011, 08:03 PM
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Jim, where will this class be running and who is in charge? We possibly could do a race this year at Thunder Road with the outlaw crowd.
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#20
01-09-2011, 08:34 PM
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Wow!
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
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