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#1
03-07-2019, 07:08 PM
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Fabricated Port Injection intake?
Is there anyone out there making an intake similar to the attached for a traditional Pontiac? I thought I saw some photos a while ago, but can't find them now. Not sure I want to go that direction, just curious.
Thanks!
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Brad Hansen 65 Cat Ventura, 66 Cat Vert, 63 GP |
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#2
03-07-2019, 07:35 PM
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Cut one up and reweld it for a Pontiac.
I always thought that a legit EFI intake for Pontiacs would sell well. |
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#3
03-07-2019, 08:00 PM
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Of interest....
Sheet Metal Intake I have been working on. http://forums.maxperformanceinc.com/...55#post4612955 .
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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 |
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#4
03-07-2019, 08:12 PM
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You mean these pictures?
It uses a Holley Front Throttle Body Inlet Top Piece. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#5
03-08-2019, 12:44 PM
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I'll further Tom V's thoughts... I took his advice and contacted Luhn Perf. about modding my Weiand 2x4 intake.
It'll receive EFI bungs and a hold down system, then I'll bolt the Holley LSx Mid-Ram lower and upper to it.
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John IG: @crawdaddycustoms YouTube: https://www.youtube.com/channel/UCK9...Nc_lk1Q/videos |
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#6
03-08-2019, 01:36 PM
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Quote:
 This intake is still carbureted. I did make a billet top for it for one BIG carb/throttle body but haven't tried it out yet. No way this would fit under a stock hood. I currently have other irons in the fire and have no plans to change anything engine wise on the GP.I wouldn't think It would be that bad to waterjet a pair or Pontiac flanges out, fab some runners, and weld them to that plenum. Just takes, time, money, and skill.
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Todd Sedlmeier Who ever thought pinewood derby cars would lead to this! October 2004 HPP Shootout participate http://www.highperformancepontiac.co...out/index.html 86 Grand Prix 535 High Port 8.93 @ 153 65 GTO 433 High Port 12.04 @ 113 |
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#7
03-08-2019, 04:04 PM
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So I guess the answer is no to anything off the shelf lol....
Could a guy take this intake and cut the runners off of it, keep the flange and water cross over... https://www.ebay.com/itm/1965-1979-3...sAAOSwHQxceCjE and this intake and cut the flange off of it... https://www.ebay.com/itm/Chevy-LS7-F...4be5%7Ciid%3A1 pick up this setup, sell the intake, find some fuel rails, fab up some new runners and call it a day? How well does cast aluminum weld to sheet aluminum? I would have to have someone do that part for me to make it look good. Again, just letting my mind wonder here a bit.
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Brad Hansen 65 Cat Ventura, 66 Cat Vert, 63 GP |
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#8
03-08-2019, 04:20 PM
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You'd still have to fab new runners in that scenario since the intake ports on pontiac heads are siamesed. I almost think it would be easier to construct the bathtub, runners and flanges from scratch and do soemthing like Tom is doing where you're using an off the shelf top for the close-out and throttle body attachment.
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-Jason 1969 Pontiac Firebird |
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#9
03-08-2019, 05:46 PM
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What chevy intake did H&M modify to make Pontiac tunnel rams?
https://headsandmanifolds.wordpress....d-for-pontiac/ Then could an injected chevy be modified the same way? Clay
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All the federales say,they could've had him any day They only let him slip away, out of kindness...I suppose Poncho & Lefty |
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#10
03-10-2019, 11:06 AM
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Tom V what intake did you use as the base an offy?
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#11
03-10-2019, 11:37 AM
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It’s a nash/warrior piece.
Last edited by HO Kenny; 03-10-2019 at 11:48 AM. |
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#12
03-10-2019, 12:27 PM
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"The special RAV heads are from renowned Pontiac engine shop DCI Motorsports and are teamed up with a DCI intake bottom. Luhn Performance added the Holley Hi-Ram intake top to the DCI bottom unit to finish the induction system out.:
https://www.dragzine.com/news/bad-bi...for-drag-week/ http://www.luhnperformance.com/index.html .
__________________
'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 |
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#13
03-10-2019, 07:41 PM
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Hmm, I like the idea of the Holley EFI intake top, just took some measurements and it looks like it would bolt on top of my Offy 360 dual quad with a base plate, would fit in nicely with my efi conversion plan. I had planned on a pair of Holley 90 degree elbows and throttle bodies but would prefer this LS top.
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#14
03-10-2019, 08:58 PM
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Taff2 what pn offy do you have
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#15
03-11-2019, 11:57 AM
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Try these:
105MM https://www.summitracing.com/parts/hly-300-232 102MM https://www.summitracing.com/parts/hly-300-219 92MM https://www.summitracing.com/parts/hly-300-218 2x4 adapter base https://www.summitracing.com/parts/hly-300-231
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John IG: @crawdaddycustoms YouTube: https://www.youtube.com/channel/UCK9...Nc_lk1Q/videos |
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#16
03-11-2019, 03:41 PM
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interesting with the adapter base. Looks like Carburetor Flange Front-to-Rear Spacing – 8-5/8” (got that from the intake 300-121 specs page)
I'll have to check spacing on the offy. Even if it had to be cut, moved and welded, as well as injector bungs added, it may save some work. Would be similar to what Tom's setup would look like other than intake style. Might have to cut the water cross over and use a tripower style due to tight spacing? Thanks!
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Brad Hansen 65 Cat Ventura, 66 Cat Vert, 63 GP |
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#17
03-11-2019, 06:51 PM
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My Offy dual quad is part number 5499. Going off the Holley blueprint on Summits site, it looks like the 300 type tops will fit.
ps, my centre to centre of the carb mounting flanges is 9". |
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#18
03-11-2019, 10:11 PM
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Thanks all!
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#19
03-11-2019, 11:53 PM
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I would think these would be the easiest to modify to fit a Pontiac.
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'67 GTO 400 HO - Ram Air - 4 speed - 3.55 Safe T Track, A/C, PS, red fender liners '78 Lemans - Drag car project |
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#20
03-11-2019, 11:55 PM
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Or maybe even this one for a milder build, closer to stock head port sizes.
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'67 GTO 400 HO - Ram Air - 4 speed - 3.55 Safe T Track, A/C, PS, red fender liners '78 Lemans - Drag car project |
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