Billet 7875 Results thread
TECH Apprentice
Joined: May 2010
Posts: 361
Likes: 0
I went 10.0@135 on a cast wheel 78/75, 6.0l, ss2 cam 3750 lbs,and I just finished up another build had a square port 6.0l, ss2, 4l80e unlocked do 645rwhp on 15lbs with a VS billet 78/75.
I went 10.0@135 on a cast wheel 78/75, 6.0l, ss2 cam 3750 lbs,and I just finished up another build had a square port 6.0l, ss2, 4l80e unlocked do 645rwhp on 15lbs with a VS billet 78/75.
https://youtu.be/BYNRDDtCnLY
https://youtu.be/BYNRDDtCnLY
Love the "free hat" haha
Guys I’m swapping my cast 7875 for a billet 7875 right now. I have no Dyno numbers but I’m making only this change and I drive the car almost every day. So I will be able to tell you the difference I feel, if any. I’m really in tune to everything with the car. I feel that my butt dyno is pretty accurate to tell me if there’s a difference or not. I can give you guys my assessment if your interested.
Ok here’s my take on it.
1) sounds total different. It has less of a whistle sound
2) it appears to spool faster. And it’s only a very little bit. If I had to put a time on it, I’d say it’s about a tenth of a second faster. it is a noticeable less lag. Not that I had much lag before.
3) midrange feels a bit stronger. I’d say about 50-60ftlbs more.
4) checking logs and videos and comparing, it’s .2 quicker from 60-115mph.
5) the blowoff valve is louder for some reason.
1) sounds total different. It has less of a whistle sound
2) it appears to spool faster. And it’s only a very little bit. If I had to put a time on it, I’d say it’s about a tenth of a second faster. it is a noticeable less lag. Not that I had much lag before.
3) midrange feels a bit stronger. I’d say about 50-60ftlbs more.
4) checking logs and videos and comparing, it’s .2 quicker from 60-115mph.
5) the blowoff valve is louder for some reason.
Last edited by Kfxguy; Jul 25, 2020 at 02:02 PM.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
Ok here’s my take on it.
1) sounds total different. It has less of a whistle sound
2) it appears to spoil faster. And it’s only a very little bit. If I had to put a time on it, I’d say it’s about a tenth of a second faster. How do I know? Well I it is a noticeable less lag. Not that I had much lag before.
3) midrange feels a bit stronger. I’d say about 50-60ftlbs more.
4) checking logs and videos and comparing, it’s .2 quicker from 60-115mph.
5) the blowoff valve is louder for some reason.
1) sounds total different. It has less of a whistle sound
2) it appears to spoil faster. And it’s only a very little bit. If I had to put a time on it, I’d say it’s about a tenth of a second faster. How do I know? Well I it is a noticeable less lag. Not that I had much lag before.
3) midrange feels a bit stronger. I’d say about 50-60ftlbs more.
4) checking logs and videos and comparing, it’s .2 quicker from 60-115mph.
5) the blowoff valve is louder for some reason.
i wont argue that, because it does spin the tires from a roll any differently. But the initial hit does feel stronger. Do I feel that it’s a huge difference? No. Im not sure if I think it’s worth the extra money. Im wondering if I should have skipped this unit and went to the on3 BMF 7675.
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
i wont argue that, because it does spin the tires from a roll any differently. But the initial hit does feel stronger. Do I feel that it’s a huge difference? No. Im not sure if I think it’s worth the extra money. Im wondering if I should have skipped this unit and went to the on3 BMF 7675.
so do you think it would be a bad idea? I do have a good boost controller that should keep it in check.
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
Ah man, I was hoping the spool noise was louder with the Billet lol... love my cast vs 78/75 spool sound.
Viren said that the billet would only be worth about 8% increase in airflow at 11-14psi. It’s not till you get much higher 20+psi that you get the full 18% flow increase.
Viren said that the billet would only be worth about 8% increase in airflow at 11-14psi. It’s not till you get much higher 20+psi that you get the full 18% flow increase.
Ah man, I was hoping the spool noise was louder with the Billet lol... love my cast vs 78/75 spool sound.
Viren said that the billet would only be worth about 8% increase in airflow at 11-14psi. It’s not till you get much higher 20+psi that you get the full 18% flow increase.
Viren said that the billet would only be worth about 8% increase in airflow at 11-14psi. It’s not till you get much higher 20+psi that you get the full 18% flow increase.
Instead of making you guys try the compare, I took screenshots to illustrate.
First one is aboit 60mph. The cast one is on bottom and has the lead (had to time then just right)
the billet one has taken over
First one is aboit 60mph. The cast one is on bottom and has the lead (had to time then just right)
the billet one has taken over
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
I understand and appreciate the effort to show the difference, but really, the dyno....or the track would have really been the way to show what each unit has to offer. Screenshots don't really get it done imo.
