 |
|
| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
| Reply |
|
|
Thread Tools | Display Modes |
|
#1
02-05-2019, 12:33 AM
|
||||
|
||||
301 draw thru turbo on a 350 Pontiac?
I asked this in the street section, probably should've done it here. Has anybody here ever taken a 301 draw thru turbo and modified it to work on a bigger motor like a 326/350 stock Pontiac?
__________________
 Johnny US Army Retired1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
|
#2
02-05-2019, 09:00 AM
|
||||
|
||||
|
I remember one on here doing a twin setup with these units... username Firechicken ???
I also think he used it on cast rods/piston deal and made a pile of scrap metal.. LOL
__________________
*** THE BIG BRACE is here *** |
|
#3
02-05-2019, 10:37 AM
|
||||
|
||||
|
I'll look that up, I was thinking that a pair of these would fit (with help) on a Offy dual quad intake.
__________________
Johnny US Army Retired1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
|
#4
02-05-2019, 12:15 PM
|
||||
|
||||
|
Twin 301 draw thrus in a 3800lb TA with 068 cammed 400 and 6X heads went 10.50s 15 years ago.
Same turbo setup runs 9.70s today on a KRE Dport headed 455 and driven 40 miles to the track. There are much easier ways to do this these days... |
|
#5
02-05-2019, 12:28 PM
|
||||
|
||||
|
Quote:
__________________
Johnny US Army Retired1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
|
#6
02-05-2019, 05:58 PM
|
||||
|
||||
|
Carbs are 800 cfm brpv qjets used on T type Buicks.
|
|
#7
02-05-2019, 06:28 PM
|
||||
|
||||
|
that's a pretty cool setup!
I can't help but think that if you could somehow do it so that an intercooler is put in the mix that with even one turbo and not too much boost, you would see substantial gains... Sheesh, the replies (that I saw earlier) in the other thread were terrible.
__________________
1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
|
#8
02-05-2019, 06:30 PM
|
||||
|
||||
|
Quote:
GTO George |
|
#9
02-05-2019, 06:52 PM
|
||||
|
||||
|
Quote:
__________________
"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
|
#10
02-05-2019, 07:30 PM
|
||||
|
||||
|
!!!! As cool as I remembered !!!!
Where's the picture of the carnage in the oil pan... am I remembering correctly ?? LOL
__________________
*** THE BIG BRACE is here *** |
|
#11
02-05-2019, 10:15 PM
|
||||
|
||||
|
Quote:
I did grenade one engine pretty bad but not from boost. An overpowered clutch and resulting rev to 7500 on the 1-2 shift with no rev limiter was the cause. I guess the boost was responsible in a way... |
|
#12
03-10-2019, 01:22 AM
|
||||
|
||||
|
I was finally able to pick up the 301 turbo stuff I bought a few weeks ago. My idea was to run two of these turbo units in-line on top of a Offy 2x4 intake. I mocked it up a bit with what I have on hand. I hate to say it but this briefed better in my head before I had the turbo. For some reason I thought the 301 manifolds would work on a traditional Pontiac.
__________________
Johnny US Army Retired1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
|
#13
03-10-2019, 08:32 AM
|
||||
|
||||
|
It's a great thought! Your post had me thinking about my '74 350 with 7.6:1 compression...there have to be a lot of them out there just begging for a cheap turbo swap and a set of better pistons.
__________________
1974 Firebird Esprit 1953 Buick Special Riviera 1963 Riviera 1963 Thunderbird 1965 Mustang 1965 Skylark Sport Coupe 1965 Dart 170 Wagon 1965 Corvair Monza Convertible |
|
#14
03-12-2019, 04:33 PM
|
||||
|
||||
|
Quote:
Then the Headers bolted on. So when the 301 Turbo Engine came out I ordered two of the passenger side manifolds and it also had the extra bolt at the top of the center exhaust ports, like the JR Headers. So I just copied what JR headers did and made adaptor flanges to match the heads and the Pontiac Turbo manifolds and bolt positions. No issues with making them work. Problem is the manifolds are not out there any longer. After that exercise I was able to purchase a pair of factory 1963/1964 Experimental center discharge manifolds that went upward with the exhaust to the RAJAY Turbo Flanges. Those manifolds were later sold as part of a set of Turbo parts to Randy Williams before he died. SO Johnny406, it is possible to make those manifolds work on a normal D-port head with a bit of fabrication. Tom V.
__________________
"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. Last edited by Tom Vaught; 03-12-2019 at 04:59 PM. |
|
#15
03-13-2019, 07:27 AM
|
||||
|
||||
|
great idea . hope you go forward with it!
Good luck!
__________________
My Half AN Injun..... |
|
#16
03-13-2019, 09:48 AM
|
||||
|
||||
|
Thinking about that dual-quad manifold, I wonder how it would work with 2 4bbl EFI units and twin turbos? I REALLY miss my Turbo Buick sometimes!
__________________
 70 GTO Restomod -- 400/200-4r, nothing to see here70 Firebird -- 455/400 69 Mach 1 -- 390-C6 07 Escalade EXT |
|
#17
03-13-2019, 06:31 PM
|
||||
|
||||
|
A know a guy is using older Pontiac heads and a modified intake on a 301 Turbo TA and he drilled and tapped the center holes (7/16 - 14 I think he said) and loctite'd a bolt in the hole and had them surfaced. They seal with no issues.
__________________
'67 GTO 400 HO - Ram Air - 4 speed - 3.55 Safe T Track, A/C, PS, red fender liners '78 Lemans - Drag car project |
|
#18
03-13-2019, 06:50 PM
|
||||
|
||||
|
Quote:
SHOULD NOT BE AN ISSUE. Tom V. "Skip" (Dudley) McCully (PONTIAC ENGINEER who worked with Tom Nell and Herb Adams) did the swap to a 455 with dual Turbos many, many years ago. The Draw Thru Carbs are the hard items to find. Tom v.
__________________
"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. |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
