Custom Exhaust .. - Chevelle Tech
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post #1 of 36 (permalink) Old May 28th, 20, 10:17 AM Thread Starter
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OLIVER
 
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Custom Exhaust ..

A guy bought a complete Flowmaster 2.5 exhaust for his Camaro ...but he got it wrong : was for A body so i got it from him at a fair price , i decided to replace my shabby 2.25 exhaust which was all cut and welded . I had laying around some 3 inch collector extensions 18 long ... so i came up with a new idea and new routing for a more flowing exhaust system- a hybrid with 3 inch extensions w electric cut outs and 2.5 tubing all the way to the back

It was a good time to paint the underneath of the chevelle !!!

First things first so scraping cleaning and painting









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Milano , ITALY

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1969 396 SS monaco orange (72)
468 Vortecpro 585 HP back to street cruiser
M20 4 speed - 3.31
Prosystems 1000
BEST ET 11.62 (with 4.10)
BEST MPH 121
BEST 60 FT 1.64
4000 lbs street car


1969 El Camino Street Strip
467 Vortecpro Tunnel ram 730+ hp TH400
BEST ET 10.67 @ 127 1.56 60FT
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post #2 of 36 (permalink) Old May 28th, 20, 11:30 AM Thread Starter
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OLIVER
 
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Re: Custom Exhaust ..

My old system , i had the flowmaster 40s
which i replaced with dynomax ultra flows








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Oliver
Milano , ITALY

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1969 396 SS monaco orange (72)
468 Vortecpro 585 HP back to street cruiser
M20 4 speed - 3.31
Prosystems 1000
BEST ET 11.62 (with 4.10)
BEST MPH 121
BEST 60 FT 1.64
4000 lbs street car


1969 El Camino Street Strip
467 Vortecpro Tunnel ram 730+ hp TH400
BEST ET 10.67 @ 127 1.56 60FT
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post #3 of 36 (permalink) Old May 28th, 20, 12:16 PM
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Re: Custom Exhaust ..

Look'in good brother! That's a lot of dirty / nasty work prepping that undercarriage. Hope all is well with you and your family.

'69 Chevelle 416" LSA TONY MAMO TFS Heads and custom Hyd roller cam.
Best 60' so far....1.34


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post #4 of 36 (permalink) Old May 28th, 20, 12:23 PM
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Re: Custom Exhaust ..

Looking Good Oliver

How are things going

Any news on whether you will have the Fall Drags at the Airport Runway this year ?

I am hoping to get to the Track for some T&T in the First 2 Weekends in June
and then on June 20th for the Street Muscle Car Challenge
nhra canadian drag racing

Ciaoooo

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #5 of 36 (permalink) Old May 28th, 20, 1:59 PM
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Re: Custom Exhaust ..

Looks good!
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post #6 of 36 (permalink) Old May 28th, 20, 2:05 PM Thread Starter
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OLIVER
 
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Re: Custom Exhaust ..

Quote:
Originally Posted by Kirk's67SS View Post
Looking Good Oliver

How are things going

Any news on whether you will have the Fall Drags at the Airport Runway this year ?

I am hoping to get to the Track for some T&T in the First 2 Weekends in June
and then on June 20th for the Street Muscle Car Challenge
nhra canadian drag racing

Ciaoooo
Hey Greg nice to hear from you ... for this season all events are cancelled

lets hope next year !!! Have fun racing !!!
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Oliver
Milano , ITALY

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1969 396 SS monaco orange (72)
468 Vortecpro 585 HP back to street cruiser
M20 4 speed - 3.31
Prosystems 1000
BEST ET 11.62 (with 4.10)
BEST MPH 121
BEST 60 FT 1.64
4000 lbs street car


1969 El Camino Street Strip
467 Vortecpro Tunnel ram 730+ hp TH400
BEST ET 10.67 @ 127 1.56 60FT
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post #7 of 36 (permalink) Old May 28th, 20, 2:33 PM
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Tony
 
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Re: Custom Exhaust ..

Looking very good, Oliver...and I'm glad you're doing OK.

My dad's village (Oratino) appears to have avoided Covid 19. But Compobasso, a few towns over in Molise, appears to have had a relatively high number of cases, unfortunately.

Virus aside, I can't wait to get back over there.

Keep up the good work in the meantime!!
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'69 Malibu 383/TCI TH350/8.2 3.36 Eaton Posi. Street Edge 10" 2800, E-Tec 170s, Custom Mike Jones HR Cam, RPM Air-Gap, StreetAvenger 770, Pertronix HEI, Hedman 1 5/8" Headers, Moser Axles, PMT 1320R Kit. [email protected] 111 MPH, 1.6865 60 ft, Nitto 555
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post #8 of 36 (permalink) Old May 28th, 20, 2:54 PM Thread Starter
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OLIVER
 
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Re: Custom Exhaust ..

So the new parts are

Flowmaster American Thunder PN 17119

Dynomax ultra flows PN 1772

Summit racing 3 inch collector extensions 18 inch long SUM-670163

QTP 3 inch Electric cut outs QTEC30 and QTP Quick Time Performance Universal Turn Down - 3" SS - 11300
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Oliver
Milano , ITALY

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1969 396 SS monaco orange (72)
468 Vortecpro 585 HP back to street cruiser
M20 4 speed - 3.31
Prosystems 1000
BEST ET 11.62 (with 4.10)
BEST MPH 121
BEST 60 FT 1.64
4000 lbs street car


1969 El Camino Street Strip
467 Vortecpro Tunnel ram 730+ hp TH400
BEST ET 10.67 @ 127 1.56 60FT
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post #9 of 36 (permalink) Old May 28th, 20, 3:00 PM
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Re: Custom Exhaust ..

Cutouts when closed are nothing but a giant restriction built into the exhaust system. I personally don’t see the point unless the car is going to still see extensive track time. Even then you’d want to know opening them would improve your timeslip significantly over that of your exhaust system without the addition, which isn’t guaranteed.

Steve R
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post #10 of 36 (permalink) Old May 28th, 20, 3:18 PM Thread Starter
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OLIVER
 
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Re: Custom Exhaust ..

Quote:
Originally Posted by Steve R View Post
Cutouts when closed are nothing but a giant restriction built into the exhaust system. I personally don’t see the point unless the car is going to still see extensive track time. Even then you’d want to know opening them would improve your timeslip significantly over that of your exhaust system without the addition, which isn’t guaranteed.

Steve R
On the street I had the electric cut outs mounted on the Y tube .. Its fun only for the noise at car shows... even if on the chassis dyno gained 40hp over the closed system which was a 2.25 (old bent and patched up )

At the track I always took the whole exhaust down and installed the 18 inch extensions only , this guaranteed the best performance...

now the new system should be free flowing
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Oliver
Milano , ITALY

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1969 396 SS monaco orange (72)
468 Vortecpro 585 HP back to street cruiser
M20 4 speed - 3.31
Prosystems 1000
BEST ET 11.62 (with 4.10)
BEST MPH 121
BEST 60 FT 1.64
4000 lbs street car


1969 El Camino Street Strip
467 Vortecpro Tunnel ram 730+ hp TH400
BEST ET 10.67 @ 127 1.56 60FT
oliver69 is offline  
post #11 of 36 (permalink) Old May 28th, 20, 8:01 PM
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Re: Custom Exhaust ..

floor pan looks great.
June 6 looks like track is having t&t. Hoping to go.
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post #12 of 36 (permalink) Old May 29th, 20, 3:12 AM Thread Starter
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OLIVER
 
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Re: Custom Exhaust ..

I made a little video on youtube here it is ... that's my friend in doing all the work ... I just did the design

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Oliver
Milano , ITALY

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1969 396 SS monaco orange (72)
468 Vortecpro 585 HP back to street cruiser
M20 4 speed - 3.31
Prosystems 1000
BEST ET 11.62 (with 4.10)
BEST MPH 121
BEST 60 FT 1.64
4000 lbs street car


1969 El Camino Street Strip
467 Vortecpro Tunnel ram 730+ hp TH400
BEST ET 10.67 @ 127 1.56 60FT
oliver69 is offline  
post #13 of 36 (permalink) Old May 29th, 20, 3:57 AM
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Re: Custom Exhaust ..

Looks really nice Oliver!
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post #14 of 36 (permalink) Old May 29th, 20, 7:54 AM
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Re: Custom Exhaust ..

Very nice Oliver! Good to see you back at it!
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post #15 of 36 (permalink) Old May 29th, 20, 7:56 AM
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Re: Custom Exhaust ..

Quote:
Originally Posted by oliver69 View Post
I made a little video on youtube here it is ... that's my friend in doing all the work ... I just did the design

YouTube
I like the music, too.
oliver69 likes this.

Mike

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