Poncho article: SD VS HO, tribesman chime in:

[Fhakya]

I just received my July '06 issue of MCE and it had a dyno shootout (fairly stock specs) of a SD455 VS an 455HO w/ some compelling charts.

Have any of you 'tribesman' had similar experiences w/ the HO kicking-tail on the venerable SD?

I just skimmed the article so far but the dyno charts look interesting.

[njsteve]

Can you attach the article? Someone swiped my issue at the post office (again)

[71-LS6]

I just skimmed over that article last night, the peak #'s on the HO were surprising and impressive @ 544 torque & 429 Hp. The SD came out pretty much where they thought it would @ 494 & 391. Jensen was definitely playing in his own yard, both engines produced those #'s in pure stock legal condition. That article gave me an unnatural craving for Pontiacs.

[JLerum]

I think the interesting thing is that the 429hp/544tq still only put the car at a 12.88 time. They were getting 1.96 to 2.02 times which are pretty good as well. Something isn't quite right. The car should go 3 or 4 tenths faster with that performance dynoed. I know Mark thinks the 3.90 gear replacing the 3.73 will give more performance but is it worth a couple of tenths? The dyno numbers are great but the performance in the car has yet to be had.

Jim

[PPPJJJFFF]

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Can you attach the article? Someone swiped my issue at the post office (again)

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I 2nd that reuest!

[Chevy454]

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I think the interesting thing is that the 429hp/544tq still only put the car at a 12.88 time.

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I don't have my issue in front of me, but I know the S/S Poncho racers I've talked to are always sacrificing TQ to cheat the HP further up the rpm range...the higher powerband lets them take advantage of steeper gears...

[JLerum]

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I think the interesting thing is that the 429hp/544tq still only put the car at a 12.88 time.

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I don't have my issue in front of me, but I know the S/S Poncho racers I've talked to are always sacrificing TQ to cheat the HP further up the rpm range...the higher powerband lets them take advantage of steeper gears...

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Not to bad mouth a GM product. Pontiacs are cool but McCarthey on the Super Stock website says Pontiacs make great torque but have issues with motor RPM acceleration. It can't get out of its own way after a certain point. Jack loves his Pontiacs but has that engineering Super Stock side of him.

JIM

[yellowjudge]

The 71/2 HO TAs are really the most overlooked cars in the hobby. Beef up the bottom end & you've got a great runner, or a hot date!!! HA

[JLerum]

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I think the interesting thing is that the 429hp/544tq still only put the car at a 12.88 time.

[/ QUOTE ]
I don't have my issue in front of me, but I know the S/S Poncho racers I've talked to are always sacrificing TQ to cheat the HP further up the rpm range...the higher powerband lets them take advantage of steeper gears...

[/ QUOTE ]

Not to bad mouth a GM product. Pontiacs are cool but McCarthey on the Super Stock website says Pontiacs make great torque but have issues with motor RPM acceleration. It can't get out of its own way after a certain point. Jack loves his Pontiacs but has that engineering Super Stock side of him.

JIM

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Here is the forum that I was refering to about the engine acceleration of the Poncho. For what it's worth????????

http://superstockforum.com/showthread.ph...ighlight=slicks


Jim