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#1
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Share your 500”+ *STREET* engine cam info
Looking to get a list of big (500+”) *street* engine cam info to get a feel for the range being used in our engines. Street car = car is street driven. Street/strip is fine, long as the car is street driven.
Please list: Cubic Inches Cam design (hydraulic/solid, flat/roller) Cam duration- “advertised“ Cam duration- @ .050 Lobe lift Compression Transmission Rear gear If dyno’d, share results if you’d like Bonus points for pic of engine in car. Chit stirring = point deductions.
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Matt 70 GTO 400 4-speed "Turbos make no noise and leave the line like Baby Diarrhea!" - GTOGeorge |
#2
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You are asking folks to do a lot of work. Here's one example (motor in my judge):
http://forums.maxperformanceinc.com/...ighlight=judge 1969 400 RAIII block, .040" over at 4.160". 408CID Stock crank RPM I-Beam rods Icon 14cc dished pistons, forged 1/16"x1/16"x3/16" plasma Moly rings #48 heads, CNC ported by Dave at SD Performance. Flow at .500" was around 254/214'ish 9.5:1 compression Ferrea 2.11"/1.77" SS valves Valve spring pressure = 155-160 lbs. on the seat, and around 400 open Factory cast iron Q-jet intake, ported RAIII Q-jet, rebuilt[A/F ratio's were real nice, in the mid to upper 12's in the mid to upper rpm range Lunati Voodoo hydraulic roller cam, 227°/233° @ .050", 278 °/282° Adv., 110° LSA, .530" lift, degreed to 105° ICL Hylift/Johnson slow bleed hydraulic roller lifters Harland Sharp 1.5 ratio roller rockers 8.800", .083" wall 1 piece pushrods Stock points distributor with Petronix conversion Factory RAIII exhaust manifolds with stock openings, and a 5' long, 2.5" pipe bolted on. Dynoed with 91 octane pump gas. These numbers are with 32° total timing. We tried 34° and it made slightly less torque and HP. Just for S&G's, we tried 36° and it made the most hp[461 @ 6000 rpm], but torque was down a little. 32° gave us the highest peak torque, as well as the highest average torque, and HP of the 3 different timing events. At 32° timing it made 475 ft. lbs., and 454 HP peak.
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1969 Judge, 4-speed, CR/Parchment, Quasi-Survivor, #'s match - under restoration |
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#3
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How does this differ from B-man's thread on engine builds? It would save someone time from having to sort through all the builds looking for 500+ inch engines but I haven'tcome across that many500+ builds on this street section. If you haven't looked at B-man's thread, it was started in 2007 and some big builds on it are done by folks who haven't posted in years so you would find info that wouldn't appear in this thread, Just sayin'.
http://forums.maxperformanceinc.com/...d.php?t=520102 (Member GTO JONES has one of those 500+ inch monsters and could be a good source of info if he doesn't see this thread. http://forums.maxperformanceinc.com/...r.php?u=147940 )
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"No replacement for displacement!" GTOAA--https://www.gtoaa.org/ Last edited by 1968GTO421; 11-08-2020 at 01:23 PM. Reason: typo |
#4
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65 GTO hardtop.
M23 ultra wide muncie 3.54 Strange S60, 28 inch tires 87 cc old round port e-heads, ported with 2.19/.77 valves Performer RPM, 850 quick fuel double pumper (very similar to a 4781) IA2 block, 505 CID eagle forged crank and 6.8 h beams BRC 2618 pistons Approx 10:1 MSD Ready to run with programmable 6AL2 Old Faithful 1.0 with Comp hyd roller lifters Rev limiter set at 5500 Pure street car. Never been to a show or the drag strip, maybe never will. Take it out on country roads after the kids go to bed and get my giggles. I have some things to do to clean up the engine compartment but it runs great and I am making progress on the little things. Last edited by i82much; 11-08-2020 at 01:20 PM. |
#5
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Most info is in the signiture.
4.35x4.350 bore & stroke. Potential for much more power with carb, cam, compression changes but fits the definition of a street car that can be driven across the country on pump gas. Starts at the touch of the key, idles at 800 in gear and drives smooth at low speeds. At this time I’m not willing to give up any of that drive ability for more power, it has enough. Biggest drawback is it’s a death trap with normal street radials, stick DOT tires required.
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
The Following User Says Thank You to TCSGTO For This Useful Post: | ||
#6
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Seeking 500 and up horsepower builds, this one just squeek's by with 502.4 hp at 5300 rpm. Dyno sheet included.
https://pontiacstreetperformance.com...d455MikeG.html .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#7
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Are you looking for 500+ cubic inch combos or 500+ horsepower combos?
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#8
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Quote:
Not 500+ horsepower, though one would expect most would be making at least that much with a 500” plus combo.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#9
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Oops...I missed the (") in the title....and the first combo posted had me a little confused. Thanks.
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#10
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I asked myself the same question... HP or cubic inches ! I also spaced the "inch" mark after the 500.
.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#11
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I thought he was looking for more than 1/2 inch of lift in the cam (e.g. .500"+ engine CAM info).
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1969 Judge, 4-speed, CR/Parchment, Quasi-Survivor, #'s match - under restoration |
#12
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No decimal point.
Big 500”+ engine cam info.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#13
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There are quite a few very successful 500+" Pontiac builds that are street driven. Couple guys I know don't post in here however.
Dad's combo has been doing it for I think going on 7 years now. 571 ci with a 4.350" bore and 4.750" crank. An old set of ported Edlebrock round port heads, 10.84:1 compression. Started off with a custom solid roller with 269/279 @ .050 and .703/.711 lift, on a 110 lsa. The combo made 724hp/764tq with the chassis headers and 4150 carb on 91 pump gas. He later switched to a custom hydraulic roller with 261/265 @ .050 on a 112 lsa and I think the lift is in the .660's but I don't have that card in front of me at the moment. I do remember this one being a Harold designed lobe, partially from the newer Voodoo profile on the intake side and the older Ultradyne profile on the exhaust side that Paul Carter spec'd to mimic the solid roller. This cam is also a 4-7 swap. The rest of the car is simple. 400 turbo, custom converter, 3.42's out back, full exhaust system and all the creature comforts the car was born with when dad bought it new. 100% street car and driven everywhere. It's actually surprisingly docile, runs cool, idles all day long and does 300 mile road trips in the AZ heat without complaint, and routinely climbs up and down the mountain passes here in Northern Arizona. It's been a fantastic engine. |
#14
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72 lemans sport 505CI mr1 block scat crank, eagle arms, Ross pistons, KRE 310 dports,10.8 compression, 93 octane diet, bullet 264-270@50 110lsa solid roller .690ish lift,Holley super sniper efi, 4l80e with custom built lockup Converter , flashes to about 4k .12 bolt 3.90 gear. Cruises at 80mph nicely with converter locked up. Ordered a set of SD 340+ Heads to hopefully install the winter.
Last edited by Slick Poncho; 11-08-2020 at 08:55 PM. |
#15
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Subscribed
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Sean 1967 GTO Koerner built 468 with Edelbrock RP’s 315cfm by Butler, Luanti Voodoo HR 20510713, 4l80e, Holley Terminator EFI |
#16
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#17
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Sorry for the confusion... yes, referring to 500 cubic inch “plus” (and bigger) engines. I appreciate all the effort, the more info the better. But if it helps simplify it, an example of what I’d like to see would be:
535 cid Hydraulic roller 304/310 advertised 260/268 duration @.050 .400 lobe lift 10.5 compression M-22 4 speed 3.73 gear But, no harm in sharing more if you are able/willing! Also, I’m aware of b-mans thread. Just specifically curious about big inch engine setups.
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Matt 70 GTO 400 4-speed "Turbos make no noise and leave the line like Baby Diarrhea!" - GTOGeorge |
#18
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IA2 block / 505 CID
Edelbrock cylinder heads / about 320 cfm at .700" lift 10:1 compression Victor intake / 1-inch open spacer ( Intake carb flange milled down 0.650" for additional hood clearance, therefore closer to 1/2-inch open spacer for dyno testing ) Precision Racing Components custom Holley HP950 carburetor 2-inch headers Current cam is a Ultradyne solid roller .020 288/292 .050 255/259 0.4176" lobe lift / 1.65-1.6 rocker ratio / .022" lash 110 LSA / 106 ICL Depending on the pull, it's now a 625-630 HP engine. The best number was 635 HP. Peak torque at 4400/4500 rpm and peak power at 5700/5800 rpm. Start of the recorded numbers at 4100 rpm the torque was 627/628 ft.lbs. It carried over 600 ft.lbs torque from 4100 rpm up thru 5400/5500 rpm. We dyno'd with the same intake manifold and carb as used before a recent cam change was made. But I'm now running direct port fuel injection. The shop was not equipped to dyno with my FI system. Outdated but further info on car: https://www.hotrod.com/articles/0712...tiac-trans-am/ .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#19
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With a NA 400 cid street motor if its 500 plus hp your looking for such a motor can be built , but it will be very undrivable !
I would put the limit at 475 hp to be realistic.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#20
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Quote:
But this thread is not about 400s making 500hp |
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