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Forum: Exhaust TECH 10-17-2022, 07:55 AM
Replies: 6
Views: 444
Posted By GTO-relic
what does OBX stand for ?

what does OBX stand for ?
Forum: Exhaust TECH 10-15-2022, 09:10 AM
Replies: 6
Views: 444
Posted By GTO-relic
I have an A-body 70 GTO, thinking of running RA4...

I have an A-body 70 GTO, thinking of running RA4 heads, and there seems to be quite a few pair of used Firebird 70-81 round port headers around for sale. I was going to try the 70-81 Firebird...
Forum: Exhaust TECH 10-10-2022, 06:49 PM
Replies: 6
Views: 444
Posted By GTO-relic
1968-72 GTO vs. 1970-81 Pontiac round port headers

greetings...would like to get opinions on ROUND PORT header fitment.
for 40 years I've been under the impression, headers that fit 1968-72 GTO, also fit 1970-81 Firebird. but that was D-port...
Forum: Pontiac - Street 09-19-2022, 07:54 AM
Replies: 77
Views: 4,387
Posted By GTO-relic
that was a mighty quick reply, for an old revived...

that was a mighty quick reply, for an old revived thread...:biggerGri
I'm not the one that replied to it so fast...
the future of this hobby, will be putting electric motors in vintage GTO's and...
Forum: Pontiac - Street 09-19-2022, 07:21 AM
Replies: 77
Views: 4,387
Posted By GTO-relic
I revive 50 year old heads by putting them on...

I revive 50 year old heads by putting them on rebuilt engines,
all the time.
there's nothing wrong with a revival.
if the revived thread is so bad, why did you post in the first place ?
this...
Forum: Pontiac - Street 09-17-2022, 05:50 AM
Replies: 77
Views: 4,387
Posted By GTO-relic
this put many a 426 Hemi, on the trailer, in...

this put many a 426 Hemi, on the trailer, in NASCAR, for years...
how bad can it be ?
you can't argue with success.

the problem with the internal combustion engine is this,
we get sidetracked...
Forum: Pontiac - Street 09-17-2022, 05:41 AM
Replies: 77
Views: 4,387
Posted By GTO-relic
ps- I saw Joe Mondello's name mentioned. FWIW,...

ps- I saw Joe Mondello's name mentioned.
FWIW, that's who did all of Big Daddy Garlits' TF cylinder heads.
Mondello was a class act. I liked his porting advice.
"you're going to do 2 things. ...
Forum: Pontiac - Street 09-17-2022, 05:38 AM
Replies: 77
Views: 4,387
Posted By GTO-relic
Originally Posted by Darin Morgan The only...

Originally Posted by Darin Morgan
The only tunnel port head I had anything to do with was that piece of crap Ford came out with because Junior Johnson though it would be a good idea. All I did was...
Forum: Pontiac - Street 08-25-2022, 06:12 AM
Replies: 20
Views: 1,290
Posted By GTO-relic
unfortunately, flow numbers at anything less than...

unfortunately, flow numbers at anything less than 28", can be misleading, and give an incomplete picture. here's why- 2 different heads that visibly have dramatic differences in port shape, valve...
Forum: Pontiac - Street 08-25-2022, 05:59 AM
Replies: 20
Views: 1,290
Posted By GTO-relic
a 455 with stock D-ports will stop revving at...

a 455 with stock D-ports will stop revving at 5200 rpm with an 068 type cam. falls flat on its face. FWIW, all dynos only measure torque, and calculate HP from it using math. even the most...
Forum: Pontiac - Race 08-21-2022, 05:13 AM
Replies: 80
Views: 8,264
Posted By GTO-relic
old thread, here's the thing... the guys that...

old thread, here's the thing...
the guys that used to make the cylinder head molds for Pontiac and GM,
were true artisans, and craftsmen, in the old world sense.
to make a sandcast mold for the...
Forum: Pontiac - Race 08-15-2022, 06:50 AM
Replies: 71
Views: 6,127
Posted By GTO-relic
yes...I noticed the video uploads on youtube were...

yes...I noticed the video uploads on youtube were not what they used to be. too bad. in some ways biggest show ever, with the most minimum coverage. and people going home a day early ? what's up...
Forum: Pontiac - Race 08-15-2022, 06:40 AM
Replies: 71
Views: 6,127
Posted By GTO-relic
lololol !! now I sense a bit of resentment... ...

lololol !! now I sense a bit of resentment...
is there any videos up of the event other than the 2 on youtube now ?
I'd like to see the drag races. the vintage race cars in the show area were...
Forum: Pontiac - Race 08-15-2022, 06:35 AM
Replies: 71
Views: 6,127
Posted By GTO-relic
lolol !!

lolol !!
Forum: Pontiac - Race 08-15-2022, 06:35 AM
Replies: 71
Views: 6,127
Posted By GTO-relic
lol

lol
Forum: Pontiac - Street 06-04-2022, 05:57 AM
Replies: 57
Views: 3,254
Posted By GTO-relic
flow rate capacity for Rochester carburetors,...

flow rate capacity for Rochester carburetors, including monojet, 4G, 2G, Qjet.
the handwritten numbers for 2G are flow at 1.5" to compare to a 4-bbl at equal pressure drop. Unless you're using a...
Forum: Pontiac - Street 06-04-2022, 05:37 AM
Replies: 57
Views: 3,254
Posted By GTO-relic
FWIW, secondary hanger specs by letter code. ...

FWIW, secondary hanger specs by letter code.
yesterday I just bent an "N" hanger, to "B" hanger specs,
and put it the 800 with CR rods just to start the motor.
Forum: Pontiac - Street 06-04-2022, 05:36 AM
Replies: 57
Views: 3,254
Posted By GTO-relic
metering area chart for jets, metering rods

metering area chart for jets, metering rods
Forum: Pontiac - Street 06-04-2022, 05:35 AM
Replies: 57
Views: 3,254
Posted By GTO-relic
jets and primary metering rods

jets and primary metering rods
Forum: Pontiac - Street 06-04-2022, 05:28 AM
Replies: 57
Views: 3,254
Posted By GTO-relic
GM Qjet secondary metering rods available c....

GM Qjet secondary metering rods available c. 1973, from richest on top, to leanest on bottom
and...how the rod tapers work
knowledge is power...Merry Christmas
Forum: Pontiac - Street 06-03-2022, 01:51 PM
Replies: 57
Views: 3,254
Posted By GTO-relic
and one more thing...the throttle blades should...

and one more thing...the throttle blades should be in line with the steel plate baffle, so the air flows staight over both smoothly, not offset from each other. otherwise that too creates...
Forum: Pontiac - Street 06-03-2022, 01:44 PM
Replies: 57
Views: 3,254
Posted By GTO-relic
at the time of publication that was the richest...

at the time of publication that was the richest metering rod with long taper made by GM,
Doug Roe was not in error, he was building these carbs and writing publications back in 1973 when they were...
Forum: Pontiac - Street 06-03-2022, 04:47 AM
Replies: 57
Views: 3,254
Posted By GTO-relic
Doug Roe published all the Rochester carb specs...

Doug Roe published all the Rochester carb specs for 1-bbl, 2-bbl, 4-bbl carbs,
back in 1973. Qjet with air valve wide open 90 degrees, is 800cfm
not 850cfm.
the logic oh, Edelbrock said a truck...
Forum: Pontiac - Street 06-02-2022, 09:01 PM
Replies: 57
Views: 3,254
Posted By GTO-relic
Cliff, It would be great if those Qjets flowed...

Cliff,
It would be great if those Qjets flowed 850 cfm, but they've been called 800 cfm by some very reputable sources for a very long time- such as Doug Roe, back in the day when they were still...
Forum: Pontiac - Street 06-02-2022, 04:49 PM
Replies: 57
Views: 3,254
Posted By GTO-relic
Carter Comp on left, QJet on right Carter has...

Carter Comp on left, QJet on right
Carter has 1.5" primaries, 2.250" secondaries
Qjet has 1.375" primaries, 2.25" secondaries.

1/8" bigger primaries on the Carter
the phenolic center section...
Showing results 1 to 25 of 80

 
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