How I adapted Hooker Blackheart Duals to TSP Headers with Cats at home
08-15-2016, 03:59 PM
#81
i had 3inch dumps before and i hated them. i swapped them for 3.5in ypipe/ipipe setup from collector to rearend and then 3inch over the rearend out the back and i didnt lose any power. iv had couple diff setups over the years and i think the more ractical your motor is the more you will see a diff but head/can type stuff i dont think the diff matters. 5hp here or there isnt going to matter. you could build 2 of the same motors and they dyno diff amounts. there was even someone with a black procharged (think it was F1) and he didnt lose much HP if any when he did before and after dyno pulls.
08-15-2016, 05:00 PM
#82
even if you lose 5hp the benefits of this system out wight that 10 fold.
i had 3inch dumps before and i hated them. i swapped them for 3.5in ypipe/ipipe setup from collector to rearend and then 3inch over the rearend out the back and i didnt lose any power. iv had couple diff setups over the years and i think the more ractical your motor is the more you will see a diff but head/can type stuff i dont think the diff matters. 5hp here or there isnt going to matter. you could build 2 of the same motors and they dyno diff amounts. there was even someone with a black procharged (think it was F1) and he didnt lose much HP if any when he did before and after dyno pulls.
i had 3inch dumps before and i hated them. i swapped them for 3.5in ypipe/ipipe setup from collector to rearend and then 3inch over the rearend out the back and i didnt lose any power. iv had couple diff setups over the years and i think the more ractical your motor is the more you will see a diff but head/can type stuff i dont think the diff matters. 5hp here or there isnt going to matter. you could build 2 of the same motors and they dyno diff amounts. there was even someone with a black procharged (think it was F1) and he didnt lose much HP if any when he did before and after dyno pulls.
I know all of you are thinking to yourself ok great but how does it perform… Well early on when this system was introduced there was a lot of negativity cast on this product due to the exhaust being dual 2.5” instead of dual 3” like the Kooks system. A lot of people commented that this system wouldn't support anything more than a head cam car at best.
I am happy to share that this system allowed my car to make 614/540
I am very pleased with these results compared to my old Pacesetter long tube and 3” x-pipe set up. That old set up made 630/534 so I lost a 16hp but picked up more torque. Honestly the numbers would probably be closer but I was having fueling issues above 5800rpm’s on these run so we stopped the pull’s there where the old numbers are based on pulling to 6300rpm.
For the amount of ground clearance and drivability I gain over the old set up I would sacrifice 16hp every day of the week!
I am happy to share that this system allowed my car to make 614/540
I am very pleased with these results compared to my old Pacesetter long tube and 3” x-pipe set up. That old set up made 630/534 so I lost a 16hp but picked up more torque. Honestly the numbers would probably be closer but I was having fueling issues above 5800rpm’s on these run so we stopped the pull’s there where the old numbers are based on pulling to 6300rpm.
For the amount of ground clearance and drivability I gain over the old set up I would sacrifice 16hp every day of the week!
Fwiw, I put down 422rwhp through the hooker blackheart duals and two high flow magnaflow cats on a LS1 with milled (but not ported) 243 heads and a mild cam.
08-15-2016, 08:08 PM
#85
08-18-2016, 01:48 PM
#86
Launching!
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That car was one of the reasons i got a trans am instead of a camaro when i got a chance to get another f body. His car was sick! I wonder if the new owner is still driving it around somewhere.
07-16-2018, 09:10 AM
#89
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RebelExtrm02. If you lived anywhere close to me I would take you out for a round of beers or 3! I have hated the loudmouth, TSP catted Y for years and have wanted true duals. Based on your writeup I decided to take the plunge. I ordered all the same parts you did and adapted it to my Pacesetters very easily. The sound is very similar (which I am super happy about) minus the rasp (which I am even more happy about) and fitment is sooo nice. Great ground clearance and tight. No more rattling and thumping and scraping for me. I decided to go the extra mile and do poly motor mounts at the same time. I even like the look of the Firebird quad tips! I couldn't be happier with the results. I'll hoist a cold one (or 3) in your honour!
07-16-2018, 11:06 AM
#90
RebelExtrm02. If you lived anywhere close to me I would take you out for a round of beers or 3! I have hated the loudmouth, TSP catted Y for years and have wanted true duals. Based on your writeup I decided to take the plunge. I ordered all the same parts you did and adapted it to my Pacesetters very easily. The sound is very similar (which I am super happy about) minus the rasp (which I am even more happy about) and fitment is sooo nice. Great ground clearance and tight. No more rattling and thumping and scraping for me. I decided to go the extra mile and do poly motor mounts at the same time. I even like the look of the Firebird quad tips! I couldn't be happier with the results. I'll hoist a cold one (or 3) in your honour!
07-21-2018, 01:57 PM
#91
Mine still puts a smile on my face every time I drive it. I think the CME Iv'e got probably makes it a little quieter than normal but when you step on the pedal it really roars.
08-12-2019, 12:45 PM
#92
On The Tree
Yep. Took me 2 weeks working on it in my spare time to install polymounts, SE 1 7/8" LT's and BH duals. I used the FM 3 to 2.5 reducers with a slight modification to the driver BH side bend. I had to extend both ends of the passenger BH side bend pipe to make it all work out but I was able to use unused parts of the BH kit to do this. I also had to cut off 1" from the driver side SE header and 1/2" from the passenger side header to make everything work out. But everything seems to be on nice and snug, no rubbing and plenty of ground clearance. I'm very happy so far. I had my car dyno'd today and while it was on the lift we noticed what looks like a just a tad bit of rubbing from the driver side pipe on the floor board. I have never heard it so its probably only happening in hard acceleration. Here is my dyno vid link for your sound pleasure. http://www.youtube.com/attribution_l...m-upload_owner
Here is the modified passenger side bend. I extended the inlet side 3.5" and welded 1" to the outlet side.
Here is what the passenger side pipe looked like before I modified it.
Here is the drivers side pipe. All I had to do was straighten out the upward bend a little bit. To do this, I clamped a thickwall pipe thats the same size as the ID of the inlet to a VERY sturdy bench and then clamped the passenger side to it with the band clamp. I then heated it red hot and leaned on it until it had half of the amount of bend that I started with. I used a long straightedge as a measuring too.
Here is another photo.
Here is the modified passenger side bend. I extended the inlet side 3.5" and welded 1" to the outlet side.
Here is what the passenger side pipe looked like before I modified it.
Here is the drivers side pipe. All I had to do was straighten out the upward bend a little bit. To do this, I clamped a thickwall pipe thats the same size as the ID of the inlet to a VERY sturdy bench and then clamped the passenger side to it with the band clamp. I then heated it red hot and leaned on it until it had half of the amount of bend that I started with. I used a long straightedge as a measuring too.
Here is another photo.
