[chuckies76ta]

https://www.motortrend.com/news/pont...ers-challenge/

[slowbird]

Originally Posted by chuckies76ta

https://www.motortrend.com/news/pont...ers-challenge/

Not sure that's a daily drive build

[Formulajones]

Originally Posted by slowbird

Not sure that's a daily drive build

Technically they aren't. The rules package changed every year but most of those engines are generally built to compete in EMC and do one thing. You won't see an engine like that in a street car being driven to work every day logging 12,000 miles a year or used to take the kids to school and pickup some groceries on the way home.

The compression is livable on that particular engine but that solid roller in most peoples minds won't be.

[PAUL K]

Originally Posted by blueghoast

Hey Paul K what gears are you running in your car?
I went from 3:73 to 3:42 with the blower motor and now
I have my pump gas 462 in my firebird 625HP-634 lbs.
The car pull's hard it should be a 10:70-10:80 ET got to get
back to the track to know for sure. Just wondering if a 275 shot
on a big shot plate would get me into the high 8 second zone?
Just cirius on your thoughts about it. Thanks

GT

If 250 gets you in the 8's you'd need to hit 100% off the line and have the chassis work..... IMO

Most of our stock block engines were around 700 HP and would run low nines with 200-300 shot of nitrous. But our Firebirds seemed to be on the heavy side weighing 3700-3900 lbs.

We usually use 3.7 - 3.9 gears. I never found a lot of difference with gear ratio other than if you take to much gear out the converter would slip that much more wiping out the RPM we were hoping to save at the stripe.

[Jay S]

I thought of this thread yesterday when I was in town and watched and listened to someone’s newer hopped up C6 Corvette roll thru town. It sounded like low idle was 1500 RPM as it sat at the stop light. It’s idle was rougher than our 445 cid 700+ HP bracket engine with open headers. With full exhaust and a X pipe my car sounds milder than that corvette. That dudes C6 sounded really wicked, and didn’t look like it was overly fun to maneuver thru town either. Don’t know what kind of power that was making, but it better be 700+ HP to idle that rough. My first thought when I heard it was I wonder if he let’s his girl friend and and her mom drive it.

[blueghoast]

Originally Posted by PAUL K

If 250 gets you in the 8's you'd need to hit 100% off the line and have the chassis work..... IMO

Most of our stock block engines were around 700 HP and would run low nines with 200-300 shot of nitrous. But our Firebirds seemed to be on the heavy side weighing 3700-3900 lbs.

We usually use 3.7 - 3.9 gears. I never found a lot of difference with gear ratio other than if you take to much gear out the converter would slip that much more wiping out the RPM we were hoping to save at the stripe.

I do hit the n20 right off the line, My 60 ft was 1:36 or1:38 can't remember
And I think it was with the rear tires but when the car set the wheels down
after second gear it took a right hand turn. Found out I bent the right
slapper bar so I'm putting cal-tracs on it now. I've got to get back to the
track and see if it'll make a high 8 sec pass. cross yo fingers LOL
Thanks for the info.

GT

[slowbird]

Might have to see if 690-700hp and street friendly enough for the wife is doable

[Wareagle]

This pump gas Pontiac V8 made 820 hp - almost Won The Engine Masters Challenge Years back

[Wareagle]

Originally Posted by slowbird

Not sure that's a daily drive build

Pretty sure they have to run on pump gas in The Engine Masters Challenge

[slowbird]

Originally Posted by Wareagle

Pretty sure they have to run on pump gas in The Engine Masters Challenge

Running on pump gas for 3-4sec on the dyno is completely different than setting in traffic for 30min in the middle of summer stuffed inside an engine bay

[PAUL K]

Originally Posted by slowbird

Might have to see if 690-700hp and street friendly enough for the wife is doable

This manifold would make short work of that goal

[Dragncar]

Originally Posted by PAUL K

This manifold would make short work of that goal

Thanks Paul, best looking Pontiac intake I have ever seen. I screen shotted that baby.
That is a lot of work done, dropping the floor and tapering the runners like that. Not too mention all the work done up top.
Mine does not fit my High Ports, I think I would have too stack gaskets.
Did you do all the work ? If you did you should take a bow.
Might consider scanning it. If you could reproduce it, people would buy it IMO.

[Wareagle]

Originally Posted by slowbird

Running on pump gas for 3-4sec on the dyno is completely different than setting in traffic for 30min in the middle of summer stuffed inside an engine bay

According to EMC they have be able to run on 91 Octane pump gas and as said in the Kasse 820 pump gas hp Pontiac V8 Article + that many of these engines go into street cars too

[blueghoast]

Originally Posted by Wareagle

According to EMC they have be able to run on 91 Octane pump gas and as said in the Kasse 820 pump gas hp Pontiac V8 Article + that many of these engines go into street cars too

Thats one thing I demand , All my cars are driven on the street
and are pump gas motors it's not trailered inless i'm going out
of town for a race. I don't drive them every all though all 3 do
get driven on the weekends one at a time 70-Firebird, 62 Tempest
And my 64 Olds that is poncho powered sence I've owned it (1975)

GT

[Louie P]

Thank You gentlemen .I so enjoy professional enthusiasm when discussing an engine . with no bantering. What a group of knowledge able experienced people THIS I why I Love pontiacs .or growth in Pontiacs thank You so much . in a rich past of Smokey unick. Arnie Bestwick Jim Taylor. Ho racing. Great s. Ken Crocie. ,Nunzi. So many . I can't remember all or spellings sorry hope administrators can fix. Remember all of us arent that smart and we learn and buy with your help. Patience humility goes along way and Py forum guest learn . Lifetime supporter Louie Pence . fellow 65 2+2 , 70 TA , 2 67 GTOs owner . All In progress thanks to You guys . been since for a long time . and enjoying dreaming.

[Stan Weiss]

Originally Posted by slowbird

Our 461 makes 610hp and is very street friendly. Power brakes, tighet'ish converter and 3.42 gears. Really is very street friendly

Brian,
Didn't the 461 you dynoed last summer make 622.5 HP?

Stan

[PAUL K]

Originally Posted by Stan Weiss

Brian,
Didn't the 461 you dynoed last summer make 622.5 HP?

Stan

I think it made over 630 but it was with my Northwind and big carb. I believe his lower number is as it's installed in the car with an RPM manifold and 950 Holley I built.

700 plus pump gas is a slam dunk with a factory block, bigger cam and good induction system. Been there done that. We were aiming for something a bit more steerable.... Hence the wife, girlfriend and mother-in-law deal.

[slowbird]

Originally Posted by Stan Weiss

Brian,
Didn't the 461 you dynoed last summer make 622.5 HP?

Stan

Paul is correct the big numbers were with a single plane, the RPM intake and 950 made 608 and that's how it's run in the car. At 4200lbs and driving to the track, zero work done and driving it home, it ran pretty well.

[PAUL K]

Originally Posted by slowbird

Paul is correct the big numbers were with a single plane, the RPM intake and 950 made 608 and that's how it's run in the car. At 4200lbs and driving to the track, zero work done and driving it home, it ran pretty well.

Be careful those Russians have a tendency to fraudulate those dyno sheets and time slips for the folks that have never done anything but the chit they dreamed up in their head.

[Stan Weiss]

Paul,
Thanks. There must have been some dyno sheet that I did not see. I was going by this.

Stan