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Wareagle · 03-09-2007, 05:49 PM

Quote:

Originally Posted by goquick

Didn't realize I could run a 60's chevy body. Think they would like seeing POWERED BY PONTIAC because chevy engines are for slowpokes across a fender?

Good one goquick.

goquick · 03-10-2007, 12:54 AM

That's some good thinking...

Jim Robertson · 03-14-2012, 12:50 AM

Been working on the heads and manifold for this one over the winter.

JY455V4-Z · 03-14-2012, 10:32 AM

Quote:

Originally Posted by Jim Robertson

Been working on the heads and manifold for this one over the winter.

damn man, i know looks aren't everything but those ports look fuggin' nice!!

69Goat1 · 03-14-2012, 11:41 AM

Jim - are you guys going to have it together for the Tulsa BOP race in April? That would be too cool!

Jim Robertson · 03-14-2012, 01:45 PM

JY,
Thanks. We will see very soon what if any HP improvements were made. They flow a bit better all the way through 1" of valve lift.
69,
Trying hard to get there with it. Dynoing sooner than later if we have any luck. :-)

Brian Baker · 03-14-2012, 02:50 PM

Never thought I'd hear of anyone mentioning 1" valve lift, let alone through 1" of valve lift, when speaking of d-ports...wow! Keep us posted, sounds like an interesting project.

J.C.you · 03-14-2012, 10:00 PM

Quote:

Originally Posted by Jim Robertson

JY,
Thanks. We will see very soon what if any HP improvements were made. They flow a bit better all the way through 1" of valve lift.
69,
Trying hard to get there with it. Dynoing sooner than later if we have any luck. :-)

Jim, what seat angles if you don't mind sharing... valve size and back cut angles

Jim Robertson · 03-15-2012, 02:13 AM

Valves diameters are stock 2.11/1.77. Seat angle and back cut are still in development but we are no where near the super stock guys...maybe there is more left in these. The intake roof height on these is almost .200" less than a 73 SD head...that dramaticallly affects valve seat angles

rad400 · 03-15-2012, 07:44 AM

Wow Jim that is a killer "D" port motor. Very nice work.

rad400 · 03-15-2012, 07:45 AM

Who says "D" port heads can't flow.

ponjohn · 03-15-2012, 07:04 PM

I think this debunks the myth that the exhaust side of d-ports is a handicap.

blueghoast · 03-15-2012, 07:18 PM

Guess I'm gona have ta send me some of my heads
down there to Jim Robertson and have him port me
a set for a few hundred dollars, Think that might
cover it (buddy). ha ha just kidding. Thats one hell of
a accomplisment. Nice job Jim.

GT.

Silver Judge · 03-15-2012, 07:45 PM

Wow, Go D Ports ~!
That intake is a mighty, mighty, nice looking piece also

R 70 Judge · 04-02-2012, 12:59 AM

Quote:

Originally Posted by JOE ALLAN

Jim: Thanks for get'n it straight....I just went out and got my numbers and stuff, this was before i saw you last reply, so using my numbers and using the 1900' because i hadn;t seen you new post that said the phycial elevation of the dyno shop was 1820' i came out with a corrected elevation of 4862'.. now my numbers are always about 400' different that thoughs that use the altimeter because i just correct the uncorrected barometer...(which was -.8 which made the corrected barometer 27.19 - same factor you had) but when corrected .....my figures if your hp is rite for (1820) 1900' the 685 hp does correct to 805+ hp....that said even though we got different ways to get the results we come out with the same final numbers. So far we are on the same page just doing it different.....Ok.....now you say that Abilene drag strip has a static altitude of 1719' which is rite for when the weather is 60 degrees-0humidity and a barometer reading 29.92..........now when we get that bad texas weather it changes the altitude to be more like 3300' thats why when we race we have to use correction factors or a weather station info to change the dial in......i know the static elevation did not change but the poor weather make the car engine feel like its run'n at a higher altitude.....Ok.....Now by my Power to weight figures and useing you T/A weight of 3565lbs. ... and just for example we say the Corrected weather at Abilene raceway is about 1900' (Good Day) you have to divide 3565 by 685 HP giving you a P/W factor of 5.204 which by my numbers says you should run (131.00 in 10.07 et in the 1/4) 1/8 th mile should be close to 107.00 mph in 6.30 if you are using a trans-brake.........with out it maybe 6.55 et....... last time i seen you run you had 10.5'" tires on your car so hook'n is gonna be hard to do unless the track has been prepared......now at sea-level i got close numbers of 139+ mph at 9.55 et in the 1/4 mile and 113+mph in 6.00et for the 1/8 th mile............now this is just my quick figure'n.. not down to the ants ibrow....... the et all depends on the weather conditions and how good the track is........the mph is more easy to figure so it will be closer......now all you got to do is run that thing and we'll see if you got the hp.........them heads are pretty but in life i learned to watch out for things that were pretty.. hahahahahahahaha........now they can all pick on me and leave you alone..........Joe

Quote:

Originally Posted by JOE ALLAN

Lynn: Thanks for get'n back to me with that info, Jim will have a hard time run'n the et because he's one of them 10.5" tire guys......If he's got the power he claims he'll have a hell of a time try'n to hook, I just got back from the races this weekend, talk about cold and windy but lots of fun....Later Joe

BTW - The car backed up the dyno numbers at the track. 6.1@113.

pastry_chef · 01:33 AM

Quote:

Originally Posted by R 70 Judge

BTW - The car backed up the dyno numbers at the track. 6.1@113.

Ummm.... BTW NO the car did NOT back up the numbers at the track!

I know a 467 bowtie with a REAL Honest 800 Horsepower (well 795.8 to be exact) the car is a few hundred pounds heavier and runs two tenths faster!

R 70 Judge · 04-02-2012, 01:33 AM

Quote:

Originally Posted by pastry_chef

Ummm.... BTW NO the car did NOT back up the numbers at the track!

I know a 467 bowtie with a REAL Honest 800 Horsepower the car is a few hundred pounds heavier and runs two tenths faster!

Same track on the same day? Too many variables with weather and elevation to honestly compare the two. Besides, everyone knows the BBC stuff can easily run circles around all of our boat anchor Pontiac junk

This is what I'm going by. Is this calculator wrong?

http://www.wallaceracing.com/hpcalculatoreigth.php

6.1@113 at 3565lbs

Your HP computed from your vehicle ET is 794.92 flywheel HP and 715.43 rear wheel HP.
Your HP computed from your vehicle MPH is 839.35 flywheel HP and 755.41 rear wheel HP.