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#1
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Howard’s hft cam q’s
Hi All,
Anybody have experience with a Howard’s 411161-10 hft cam? 465/470, 223/235@.050, 110, 2-6k range. If so how do you like it and what cube, compression, trans and gear were you running? This cam is on my short list for the new motor in my ‘69 LeMans, 455, 4speed and 3.23/3.40 rear. No strip just street usage to plunder and pillage Mustangs, Challegers and Civics LOL Thanks, ‘Vid Sutton. Sent from my iPhone using Tapatalk |
#2
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For stop light to stop light Mustang shaming I'd go with https://pontiacspeedshop.com/rattler...80-488-109lsa/
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Randy Repp 1964 GTO "GoatZilla" 1964 GTO "Injunuity" A/FX Nostalgia Super Stock 220" Rear Engine Pontiac Powered Dragster https://www.facebook.com/PontiacSpeedShop/ https://www.facebook.com/GoatZillaRacing/ https://www.facebook.com/groups/RebuildExcitement/ https://www.facebook.com/Call1844RacersRV/ https://www.facebook.com/groups/INJUNWARS/ |
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#3
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Howard’s hft cam q’s
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Another tempting choice, this grind is also on my radar. I’m trying to hit that mark where it’s “comfortably streetable” but doesn’t disappoint under throttle. Sent from my iPhone using Tapatalk |
#4
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With iron heads?
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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! |
#5
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Yeah, I’m getting my 62’s ported by a shop in Sonoma, CA. Pistons will be dished about 28cc for something around 9.4:1. Sent from my iPhone using Tapatalk |
#6
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That 2000-6000rpm range may be close in a 350 build but that cam will be DONE before 5000rpm's in a 455 build.
I didn't see the compression ratio mentioned but the smallest cam I'd even think about putting in a well thought out 455 build would be 230 @ .050" and at least 280 @ .006".....FWIW......
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#7
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Cliff has been typing this since I've been on this forum - he's got to be getting tired of it - this statement is as close to gospel when camming a 455 as there is..
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#8
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Quote:
Sent from my SM-G965U using Tapatalk
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68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
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#9
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Well like Cliff posted you need more duration and I would want to run the valve lift to .525” to .550” to take good advantage of that porting work!
What will you run for a intake?
__________________
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! |
The Following User Says Thank You to steve25 For This Useful Post: | ||
#10
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If you insist on using a cam from Howard's consider their H2333383 lobe on the intake side, it is a Harold Brookshire Design.
Seat 279 .020 257 .050 233 .200 147 0.3380 lobe lift Have it custom ground. Use a exhaust lobe that is suited to your exhaust flow after the port work is done to the cylinder heads, that and the entire exhaust system on the car. Have it ground with whatever lobe separation desired, be it the 109, 110 or even a 112. .
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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 Last edited by Steve C.; 06-26-2021 at 02:47 PM. |
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#11
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Quote:
X 2 That 455 will want 1.65 ratio rockers, if you have clearances for them. Also pay attention to the valve spring specs. |
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#12
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I will also point out Tim Goolsby at Bullet Racing Cams has a very nice lobe to consider on the intake side, but it has a tad bit less .050 duration and less lobe lift than the Howard's lobe.
I mention them because Tim is very good to work with and very 'Pontiac savvy'. It is his number H276/330 either the A or B lobe depending on the rocker arm ratio in use. seat 276 .050 228 .200 140 .3300 lobe lift .
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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 |
The Following User Says Thank You to Steve C. For This Useful Post: | ||
#13
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Quote:
http://forums.maxperformanceinc.com/...d.php?t=776169 |
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#14
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Going to run an RPM with an 850 DP for starters. I’m a little embarrassed for not running a Qjet so I’ll hide that under a dual snorkel, haha
I’m on the fence between RARE OS RAIII manifolds and mid/full length 1 5/8 headers. Right now the car has a 3:23 open rear. I figure I’ll get the motor in and see how I like the 3:23’s with the combo, but a 9” is coming after I get the motor in. I’ll tweak the gear based on what the new motor seems to want. It’s probably not too far off with the 3:23’s. Sent from my iPhone using Tapatalk |
#15
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It may not want 1.65s on the exh side dependent on what the exh port work picks up !
__________________
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! |
The Following User Says Thank You to steve25 For This Useful Post: | ||
#16
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Vid, My builder(Gaydosh Performance/Baltimore) has been using his custom ground Howard's HFT cams in recent years. Myself and Mook on here have the same cam(I have D ports & he has round ports) and both dynoed 569/580hp and 630 tq so obviously a HFT can get it done. I think your 3.23s are a GREAT choice(get posi though).
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Chris D 69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60' |
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#17
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Googled up.....
"Measuring dyno results from one facility to another is always going to be like measuring apples to oranges to some degree, regardless of the correction factor. Finding a reliable dyno shop takes research, patience and sometimes a little luck. Ask around." It is silly to consider only dyno testing at KRE is valid and others are not relevant. Side note, I know Rocky Rotella has used Howard's cams with good results. .
__________________
'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 |
The Following User Says Thank You to Steve C. For This Useful Post: | ||
#18
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Quote:
Those are some big numbers! Thanks for the info. Is that with aluminum heads? I like the 3:23 too and yes a posi is on the master plan Sent from my iPhone using Tapatalk |
#19
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Vid, We both have aluminum heads/467" and we both put a lot of street miles on our cars. I have over 7k miles on mine and Mook definitely has more miles on his. Gaydosh has a few different custom grinds and usually has a few in stock.
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Chris D 69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60' |
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#20
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OCMDGTO, looks like 245/251D .561/.594
I like it. Curious on the LSA and idle vacuum. |
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