[wheneaglesfly]

Those ficken H cars are running 9's.
Street driven to track & back home.

[wheneaglesfly]

Originally Posted by Skip Fix

So some real track time data on my 78 I posted in the exhaust section thread.

I had 3" H pipe 2 chamber 3" flowmasters and 2.5 mandrel tailpipes omn the car for legal NMCA classes when I ran the RAIV 400. Dropped in the first E head 455 with a 259/262 @ 0.050 solid roller. It would pick up 0.2-3 sec open headers over closed exhaust with mufflers and pipes still on the car. While swapping tranny and convertor noticed mufflers and tailpipes were rusty so pulled the whole system off. Took it to the track and did some tuning. Then add a 3" Dr. GasX and 3" Ultraflows into 3" Torque Tech mandrel tailpipes. Even with the additional weight of the system the car ran identical. 1/8 6.9s @ 99-100 1/4 10.90s @ 123 with that motor.

I believe you.

But I was not there.

Retune & Rejet often required.

[HWYSTR455]

Originally Posted by Skip Fix

So some real track time data on my 78 I posted in the exhaust section thread.

I had 3" H pipe 2 chamber 3" flowmasters and 2.5 mandrel tailpipes omn the car for legal NMCA classes when I ran the RAIV 400. Dropped in the first E head 455 with a 259/262 @ 0.050 solid roller. It would pick up 0.2-3 sec open headers over closed exhaust with mufflers and pipes still on the car. While swapping tranny and convertor noticed mufflers and tailpipes were rusty so pulled the whole system off. Took it to the track and did some tuning. Then add a 3" Dr. GasX and 3" Ultraflows into 3" Torque Tech mandrel tailpipes. Even with the additional weight of the system the car ran identical. 1/8 6.9s @ 99-100 1/4 10.90s @ 123 with that motor.

That's fairly real-world results. But I wonder if the X over the H was the determining factor? Or contributed the most to the difference I should say.

2016 Hellcat Charger with drag radials has done 10.7 in the 1/4 by some trade rags, with a few upgrades, it would be in the 9s. BUT, you toss a blower on a Pontiac, where do you think you would be? Or even just build an IA2 for the $40k+ you would save?

.

[wheneaglesfly]

Originally Posted by HWYSTR455

That's fairly real-world results. But I wonder if the X over the H was the determining factor? Or contributed the most to the difference I should say.

2016 Hellcat Charger with drag radials has done 10.7 in the 1/4 by some trade rags, with a few upgrades, it would be in the 9s. BUT, you toss a blower on a Pontiac, where do you think you would be? Or even just build an IA2 for the $40k+ you would save?

.

I am leaning towards Turbo.
Charge air temps can be an issue Using a Blower roots style.
Only mechanical part moving in the Turbo is the Exhaust Turbine & Cold side compressor turbine.

[ta man]

Originally Posted by HWYSTR455

That's fairly real-world results. But I wonder if the X over the H was the determining factor? Or contributed the most to the difference I should say.

2016 Hellcat Charger with drag radials has done 10.7 in the 1/4 by some trade rags, with a few upgrades, it would be in the 9s. BUT, you toss a blower on a Pontiac, where do you think you would be? Or even just build an IA2 for the $40k+ you would save?

.

That will be my next street engine..either a procharged engine,or a 500plus cube and run mid to low 10's and a full street car.I really want to see a Hellcat run..especially at the slippery track I run at..I don't mind getting beat...I eventually come back and beat every street car that beats me!

[ta man]

Originally Posted by Skip Fix

So some real track time data on my 78 I posted in the exhaust section thread.

I had 3" H pipe 2 chamber 3" flowmasters and 2.5 mandrel tailpipes omn the car for legal NMCA classes when I ran the RAIV 400. Dropped in the first E head 455 with a 259/262 @ 0.050 solid roller. It would pick up 0.2-3 sec open headers over closed exhaust with mufflers and pipes still on the car. While swapping tranny and convertor noticed mufflers and tailpipes were rusty so pulled the whole system off. Took it to the track and did some tuning. Then add a 3" Dr. GasX and 3" Ultraflows into 3" Torque Tech mandrel tailpipes. Even with the additional weight of the system the car ran identical. 1/8 6.9s @ 99-100 1/4 10.90s @ 123 with that motor.

Thanks Skip
Real time results are the best...pulling my tailpipes leaves a very efficient exhaust up front...3 inch with a X and Ultraflows......how were those Torque Tech tailpipes for fit??

[jonmachota78]

Hellcats are toast with street tires

https://youtu.be/1FaLDa9j5-c

[Skip Fix]

They fit great! Not SS but aluminized. Same ones still on the 78 for the past 10 years!

[HWYSTR455]

Originally Posted by ta man

That will be my next street engine..either a procharged engine,or a 500plus cube and run mid to low 10's and a full street car.I really want to see a Hellcat run..especially at the slippery track I run at..I don't mind getting beat...I eventually come back and beat every street car that beats me!

I was this [] close to finishing my procharger 455 build, XFI, sequential, and decided it would be easier to build a 535 or 555. Just recently sold the procharger, intercooler, ECU stuff, intake, throttle body, and injectors too. Just easier to do it NA.

Got a fresh, never had fluid, TKO600 RR, full kit from Keisler, McLeod blow proof, and a McLeod street twin, will sell all that too, going to a 4L80E. Funny how time changes things.

I have Torque Tech tail pipes on my 'bird, fit excellent, but they're 2.5s. At the time, the 70-73 exhaust tips were only available in 2 1/4, so I cut the ends at an angle like the OE tips, and had the whole tail pipes chromed. They look great still, but will probably go to 3" after hearing your results Skip.

I have a collector-back Pypes kit, still in the box, will probably sell that too...

.

[ta man]

Originally Posted by Skip Fix

They fit great! Not SS but aluminized. Same ones still on the 78 for the past 10 years!

That aluminized stuff lasts...my exhaust is the same looks good..Thanks

[ta man]

Originally Posted by HWYSTR455

I was this [] close to finishing my procharger 455 build, XFI, sequential, and decided it would be easier to build a 535 or 555. Just recently sold the procharger, intercooler, ECU stuff, intake, throttle body, and injectors too. Just easier to do it NA.

Got a fresh, never had fluid, TKO600 RR, full kit from Keisler, McLeod blow proof, and a McLeod street twin, will sell all that too, going to a 4L80E. Funny how time changes things.

I have Torque Tech tail pipes on my 'bird, fit excellent, but they're 2.5s. At the time, the 70-73 exhaust tips were only available in 2 1/4, so I cut the ends at an angle like the OE tips, and had the whole tail pipes chromed. They look great still, but will probably go to 3" after hearing your results Skip.

I have a collector-back Pypes kit, still in the box, will probably sell that too...

.

I'm always thinking about the next build or phase...I've always loved stock appearing cars...I'd like to make my car more stockish outside in the future..much like a stock 80 trans am,snow flake rims,special edition stripes,stock interior,stock shifter but with a roll bar,and run low 10's...

[AG]

You will also need SFI approved belts, trans shield/blanket, balancer, flexplate, a driveshaft loop and an engine diaper, but you need most of that stuff right now anyway. Your car is very impressive. I think your car will become an example of what a lot of people will want to do with their street cars given the rear gear you use and the times you run. A real street/strip car that can run real low 11s with a 3.08 gear.

[HWYSTR455]

I still say steeper gears, bigger cam, and an OD trans would make a world of difference, and still have the streetability you have now.

.

[wheneaglesfly]

http://www.youtube.com/watch?v=yHxHu...e_gdata_player

Originally Posted by jonmachota78

Hellcats are toast with street tires

https://youtu.be/1FaLDa9j5-c

[wheneaglesfly]

Not messing around with highway gears.

4.30 :1.

Titanium .

[Pontiac Derek]

I have always had a thing for engines that Like a big Load on them like they could care less! My Dads 75 GP all Black 455 TH400 with 2.56 gears, we would tow our big ski boat and trailer up over Mt Hood like it was nothing! That left a big impression on me as a young kid! Especially when we got a brand new Dually with a 454 and it struggled its ass off to do the same trip
Pontiac's are Awesome!
That 455 had 1970 parts in it, 066 cam, small valve 15 heads, 70 4bbl
And HO manifolds with dual 2.25" exhaust
Junk parts by todays standards but as a little kid it was Amazing lol

[Pontiac Derek]

TAman aka "Ernie" is an inspiration and shows people a different method to going fast while remaining Cadillac Like Streetability!
Its not for everyone!
You will here a LOT of people saying get an Overdrive and throw some real gears in there and yes that would get him in the tens, it Just Comes Down to what you want to do with your car!
I don't know of any other cars running Ernie's ET's with just a 461 and a head with only 197cc runner, heck his heads are not even the latest version Dave Offers!
I believe Ernie's car with a few well chosen upgrades will run 10.90's at 123mph

[tpssonic]

Originally Posted by Pontiac Derek

TAman aka "Ernie" is an inspiration and shows people a different method to going fast while remaining Cadillac Like Streetability!
Its not for everyone!
You will here a LOT of people saying get an Overdrive and throw some real gears in there and yes that would get him in the tens, it Just Comes Down to what you want to do with your car!
I don't know of any other cars running Ernie's ET's with just a 461 and a head with only 197cc runner, heck his heads are not even the latest version Dave Offers!
I believe Ernie's car with a few well chosen upgrades will run 10.90's at 123mph

Agreed PD! WAY TO GO TA MAN!

[wheneaglesfly]

To each their own.
If You have 650-700 to 2,000 Ft/lbs Flywheel torque on tap Gearing not real important I suppose.

Seems odd to me not to take advantage of lower gears if Drag Racing is the goal.
Every single Chevy guy does.

[Skip Fix]

The X pipe sure could have been some of the deal also over the H pipe. But it was tuned with H pipe first as well as the open header runs, then retuned with X.

Torque Tech make some nice fitting exhaust. My old Buick buddies turned me on to them back in the 90s.