FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#1
|
|||
|
|||
Factory port work
Well not really port work more the lack of. This is the 69 intake I just had blasted it was definitely a little worse than most.
|
#2
|
||||
|
||||
Wow..... I know if that was a reproduction intake manifold a bunch of folks would get a worked up over that.
|
The Following 2 Users Say Thank You to PAUL K For This Useful Post: | ||
#3
|
||||
|
||||
Go look up into #8 runner at the crap that needs to come out below the bolt boss.
__________________
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! |
#4
|
||||
|
||||
And it didn’t affect how it ran.
I purchased a ‘71 455 HO intake back in the early ’90s and of course it looked much worse than that iron intake and much like the current repros, it’s not like it slowed those cars down and made them run like turds. People get too worked up about these things, some intake to head port mismatch doesn’t really matter much if at all on your average street engine.
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#5
|
||||
|
||||
Quote:
If so do all of the larger ports match up to the same manifold "H"? Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#6
|
||||
|
||||
Night shift Saturday night? Or Monday morning? Hehe
__________________
1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
#7
|
|||
|
|||
Quote:
When I worked at the Pontiac dealer we would of course take the new cars out and run the crap out of them during PDI's. I remember distinctly identical cars running quite a bit different from each other. It all depended on whether the engine was built more or less closely to the engineers design specs. or just barely within tolerance like that manifold which probably should have been rejected, melted down and re-poured. (Must have just made it through inspection at 4:55 PM on a Friday) |
The Following User Says Thank You to mgarblik For This Useful Post: | ||
#8
|
||||
|
||||
My SR 72 HO intake I bought in '79 was a little off but not that much. My factory intake on my 78 TA original motor was almost a perfect match-of course I tossed it when I got the HO intake
And in high school we tossed a 409 block that could have been sleeved that now guys would pay $1500-2000 for !
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#9
|
|||
|
|||
It’s definitely worse than most I have had but it doesn’t take long to clean it up to a stock gasket. The pictures are 3 different ports I should have put all 4 but the one was actually pretty good.
|
#10
|
|||
|
|||
Way back Car Craft did a before and after port match dyno test and picked up 3 hp. I had a '72 cast iron intake with a huge glob of slag inside the #8 port. It was as big as your thumb nail. I got it off a junk yard car so someone drove around like that for 20+ years.
|
The Following User Says Thank You to android 211 For This Useful Post: | ||
#11
|
||||
|
||||
If the manifold flange exit is even a 1/16” smaller then the head that’s not a issue, but you do not want a mismatch the other way.
__________________
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! |
#12
|
||||
|
||||
Had a 69 intake with a thin chunk of casting flash, around the size of a nickel, obstructing one port. Only needed a light tap with a hammer to remove most of it.
|
#13
|
|||
|
|||
Google....
Is intake manifold port matching worth it? You will get dozens of responses, and the same amount of opinions on the subject ! Here is one.... "On the surface, this would appear to be an important part of any high performance engine build. This would seem especially important when the intake port opening is smaller than the manifold. This is even supported by flow bench testing where any obstruction or sharp edge at the port inlet results in major flow losses." "But this is one situation where the flow bench can lie to you." Source, and more here: https://www.onallcylinders.com/2016/...0flow%20losses. And here a discussion we had on PY.... https://forums.maxperformanceinc.com...d.php?t=815791 .
__________________
'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 |
#14
|
||||
|
||||
Quote:
Oh christ! Google I think it depends ..... a lot I know of one case it would've made a significant difference. Your old 600 HP factory block build with the Torker 2. |
#15
|
|||
|
|||
Paul mentioned my previous 600 hp 462cid combo.
During the dyno session we tested a Holley Street Dominator intake that was worked by Dave Bisschop with a 1/2" open spacer and it made 589.4 hp at 5600 RPM. The Victor was also tested with a 1/2" open spacer, it made 600.9 HP at 6000 rpm. Then we tested a borrowed Torker II intake that was unmodified and not port matched to my heads and it made 566.7 hp at 5600 RPM. My cylinder head ports were about 2.300" tall. My intakes are always port matched to the cylinder heads in use along with runner blending. If that TT2 intake was properly port matched and runners blended would it have had better results? Google won't help there .
__________________
'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 |
#16
|
|||
|
|||
The 72 intake I just port matched looked just like that on one side. The other side was nearly perfect.
|
The Following User Says Thank You to TA63 For This Useful Post: | ||
#17
|
|||
|
|||
What we don't see in any articles I have read through is' "port matching the intake to the heads will hurt HP and Torque". If you are paying someone to do this work on a street car and they want $ 200.00 to do it. Then it may not be "worth it" for a couple HP on a street engine that may not see 4000 RPM. That's why the factory didn't do it and the lousy looking one in this thread made it on a factory engine. But if you are doing the work yourself, a chance to pick up say 5 HP for free is appealing. Labor is yours and making 5 extra HP for a couple hours work on a really bad intake is worth it to most hot rodders. Find 5 HP in 10 places on a blueprinted engine build and you have 50 extra HP when it's all done. We do this every class day at school. The little things add up, the gains don't all come in one place. That's why every engine we dyno, even with stock heads, stock cams, intake, carb and exhaust manifolds always make very close to factory rated HP or a little more. Last year a student did a regular 400 Pontiac for a GTO restoration. Rated at 350 HP. Everything stock, right to the cam and rocker arms. It made 377 HP @ 451 ft. lbs torque
|
#18
|
||||
|
||||
Also please note that if the exit on the intake runner happens to width wise be less it 100% not a issue as long as it’s not more of a mismatch then the amount that the push rod budge sticks out into the head.
This can save you a good amount of unnecessary work at times.
__________________
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! |
#19
|
||||
|
||||
Quote:
__________________
1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
#20
|
||||
|
||||
Quote:
Like mentioned not that big of a deal. Touch it up if its bothersome. Or run with it. The engines ran fine 55 years ago. |
Reply |
|
|