[Steve C.]

Related ?

"As far as power is concerned, tail pipe length after the mufflers has no measurable effect on the power if a large change in cross section is present up stream (toward the motor) of the tail pipe. An open-type muffler, or a resonator box, provides this cross-sectional change. The tail pipe length exiting most glass pack installations is also of little consequence if a resonator box is used, but is of significant influence if not."

http://www.superchevy.com/how-to/exhaust/0505phr-exh/


It won't be long and he will be making 10-second passes

.

[grandville455]

Originally Posted by ta man

I wasn't expecting huge results due to the hot weather compared to the last outing..I will check the DA of both days to see what it was...Ran five times..1st pass 11.23/121.28 1.6469 60ft,2nd pass 11.21/121.52/1.6457 60ft,3rd pass 11.2179/121.97/1.6810 60ft,4th pass 11.2052/122.23/1.6782 60ft,5th pass smoked the tires track got dirty from some trucks 11.566/121.92/1.8879 60ft

Beat the old best by quite a margin in warmer weather..the tailpipes were a restriction.

Thats Awesome ernie!!!!

[PAUL K]

Originally Posted by grandville455

Thats Awesome ernie!!!!

X 2

[69FIREBIRD76MM]

Back in the days when I used to street race all chevy guys were running 4.10', 4.56', & 4.88's, never really heard 3.08's on a street strip chevy. Except 1, My friend had a nice 1970 nova, inski roller 396, 3.08's, that thing will run 13. Flat at 106 on street tires he beat alot of well built cars.

[Skip Fix]

I've got some 3" mandrel 45s I'm going to have welded to look like splitters and polish.

Might have to order some for future projects if they are going to close.

[Skip Fix]

Meant to add stainless steel 45s.

[TCSGTO]

Cool video comparing full 2.5" to 3" exhaust
https://m.youtube.com/watch?list=PLG...&v=_PVXvHkr-Vs

[Half-Inch Stud]

Last night discussion with an expert racing engine designer/builder/tuner almost got sideways for me when I defended the use of 1/4 mile performance evals for the use of evalating road-race engines.

The fella was completely correct that "every part and everything done to a 1/4 mile engine needs to be thrown away when applied to a road race engine. 8700 rpm, 5000 stall converters, gears, tires, chassis.

Then i said:" well yea except i do an off-idle launch with highway gears to get the numbers."

[wheneaglesfly]

I watched every single Hotshot Corvette owner fail in the Corvette World fail to Street Race & Beat the Hellcats.
All I talked about was Pontiac Musclecars Street Racing in the End.
Also Said Fick You & Chevy Power.
Going back to my Pontiacs.
Real Thunder.

[Chicagogoat]

I used to know a chebby guy. He had a 71 Chevelle 496 rectangular port iron heads, low rise single plane, Dominator, solid roller cam 11:1 CR. Ran 11.40's every outing at the track. But it wasn't immune to engine troubles. Broken valve train hardware, very rough idle, can't hang in traffic, overheating, he would never cruise long distances with his 4.11 gears, 4000 stall converter and tempermental combo. Yes it ran great ET's but was not well suited to street duty which is why he went LS eventually. A well built and well tuned Pontiac street machine will always be the best in my opinion and reliable to boot! Anyone of the other brand guys would have to see it to believe it and then they still would be skeptical to see a pump gas Pontiac running low 11's with 3.08 to 3.55 gears, HR cams, 3000 stall converters, Qjet or 4150 cam, etc. We all know there's a lot of tuning and know how to get there but that's not supposed to happen!

[pastry_chef]

Originally Posted by Chicagogoat

I used to know a chebby guy. He had a 71 Chevelle 496 rectangular port iron heads, low rise single plane, Dominator, solid roller cam 11:1 CR. Ran 11.40's every outing at the track. But it wasn't immune to engine troubles. Broken valve train hardware, very rough idle, can't hang in traffic, overheating

No surprise there!
Here is a far better PROVEN combo.

Downsize to a 454
Factory iron OVAL ports, 2.19 / 1.88 installed and bowl work.
9.5 compression
Ultradyne hyd flat 231/239 - 110 LSA - .555/.570
Edel RPM
HP 1000 Carb
1.75 inch headers
4.10 rear axle.

11.4 @ 115 in a 3800 lbs car

[ponjohn]

Are you running just the dumps after the muffler?

[Chicagogoat]

I gotta say Pontiac is unique in that it doesn't take "race parts" to go "fast". Show me a Ferd or Chebby guy going low 11's with 3 speed Autos, 3000 stall converters, 240ish duration and .600ish lift HR cams, and friggin 3.08 gears in 3800-4000 lbs street machines!

[PAUL K]

Originally Posted by Chicagogoat

I gotta say Pontiac is unique in that it doesn't take "race parts" to go "fast". Show me a Ferd or Chebby guy going low 11's with 3 speed Autos, 3000 stall converters, 240ish duration and .600ish lift HR cams, and friggin 3.08 gears in 3800-4000 lbs street machines!

^^^Truth^^^

[wheneaglesfly]

Originally Posted by Chicagogoat

I gotta say Pontiac is unique in that it doesn't take "race parts" to go "fast". Show me a Ferd or Chebby guy going low 11's with 3 speed Autos, 3000 stall converters, 240ish duration and .600ish lift HR cams, and friggin 3.08 gears in 3800-4000 lbs street machines!

There will always be cars like yours being built.

There is A Single & Twin Turbo Revolution taking place right now.
1,000-2,000-4,000 Hp on the street.

[Chicagogoat]

Originally Posted by wheneaglesfly

There will always be cars like yours being built.

There is A Single & Twin Turbo Revolution taking place right now.
1,000-2,000-4,000 Hp on the street.

The majority of street machines remain naturally aspirated by and large. Those with limitless budgets and tube chassis "street outlaws" style cars are definitely next level. But not all of us have the resources or time required to keep a beast like that going. I haven't pulled up next to a "ringer" like that in a few summers. But if I did, it sucks but it's bound to happen. Just like we can play sports with our kids or buddies and have a dam good time doing it, knowing full well we wouldn't hold a candle to the professionals or ones that live and breathe it if we had to compare.

I agree with you tho on the new era now with Hellcats out there everywhere. This has changed the game a lot now that your typical a-hole can just put drag radials on it and terrorize most anything on the street. Believe me, they are dying to spank us "old dinosaurs" at our own game as the ricers

[wheneaglesfly]

Originally Posted by Chicagogoat

The majority of street machines remain naturally aspirated by and large. Those with limitless budgets and tube chassis "street outlaws" style cars are definitely next level. But not all of us have the resources or time required to keep a beast like that going. I haven't pulled up next to a "ringer" like that in a few summers. But if I did, it sucks but it's bound to happen. Just like we can play sports with our kids or buddies and have a dam good time doing it, knowing full well we wouldn't hold a candle to the professionals or ones that live and breathe it if we had to compare.

I agree with you tho on the new era now with Hellcats out there everywhere. This has changed the game a lot now that your typical a-hole can just put drag radials on it and terrorize most anything on the street. Believe me, they are dying to spank us "old dinosaurs" at our own game as the ricers

I am an old Dinasour so to speak.
The Street Performace Single Turbo builds I have worked on so far are 600-650 Hp Theoretical baseline.
Mild cammed as many like.
Nice street manners.
Superb torque.

Feels 10-second fast on the street.
Likely 11.2-11.5 at track.

Lots of one off fabbing typical.

[HWYSTR455]

Yeah, I have to disagree that Pontiac's are the only brand that can 'do it', you guys must be in a different part of the country or something. Around here, there's everything, all have something fast.

Look at Buicks, 455s for starters, there's plenty of stout running GSs with the 3.08 type gear setups. Then there's the GNs, but we're talking about NA stuff for the moment, right?

Olds 455s, have to keep in mind, they are 4.25 stroke from the factory, and although you have to spend a little more on the heads, they can be every bit as fast as Pontiacs.

Fords, look at all the 460 combos out there, would be naïve to think they're not fast, and can't do it with highway gears, they have 557ci combos.

Mopars? They have had way better heads than Pontiacs for YEARS, and stroker 440 kits that are 505 and 535 just like Pontiacs, bigger too, and Indy heads rock.

My personal preference is BOPs, and I've been doing Pontiacs since the 70s. I like Pontiacs, and even if I'm slower, I'm basically going to 'do it' with a Pontiac.

Not knocking the accomplishments, but need to keep it in perspective.

.

[HWYSTR455]

Originally Posted by wheneaglesfly

There is A Single & Twin Turbo Revolution taking place right now.
1,000-2,000-4,000 Hp on the street.

The revolution is old, it started in the 90s. I remember this S-10 pickup with a 383 SBC that had an 88 on it, tubbed, guy drove it everywhere. Stupid fast.

Guys with the REALLY fast street cars, they don't talk, there's no need to brag, but if you show cash...

.

[wheneaglesfly]

Originally Posted by HWYSTR455

The revolution is old, it started in the 90s. I remember this S-10 pickup with a 383 SBC that had an 88 on it, tubbed, guy drove it everywhere. Stupid fast.

Guys with the REALLY fast street cars, they don't talk, there's no need to brag, but if you show cash...

.

Actually 1978 with the MACHO H/O Racing Trans Ams.

These guys are running around with 1,000 HP & no Roll Bars.