Installed a Magnuson Supercharger on a Z51...
01-30-2016, 09:45 PM
#41
Fortunately I've had the pleasure of owning every configuration available for a V8 street car at one time or another - centri, PD, and twin turbo.
Centri seems to make more power at the top because it isn't capable of making boost at lower RPM - boost is a function of speed, so the higher the RPM the higher the boost. It is normally the lowest cost solution and has the least efficiency.
The PD (roots) blower makes boost everywhere, if boost is matched at the top end it will make the same power and you get the benefit of the low speed performance. These offer good efficiency and great drivability, but are limited to about 900-1000 crankshaft HP due to the availability of a large unit (largest currently is a TVS2300 - 2.3 Liter)
Centri seems to make more power at the top because it isn't capable of making boost at lower RPM - boost is a function of speed, so the higher the RPM the higher the boost. It is normally the lowest cost solution and has the least efficiency.
The PD (roots) blower makes boost everywhere, if boost is matched at the top end it will make the same power and you get the benefit of the low speed performance. These offer good efficiency and great drivability, but are limited to about 900-1000 crankshaft HP due to the availability of a large unit (largest currently is a TVS2300 - 2.3 Liter)
so let's say 50 to 150 run roll race what will win both with 700whp centi vs roots
01-31-2016, 04:53 AM
#42
01-31-2016, 06:08 AM
#43
Team Owner
And a lot of the newer PD blowers are limited by pull/drive system. I believe the small pulley setup you can do on the c7 maggie won't make close to 700rwhp. I believe CPR maxed one out.
The 1st race maybe close but in my experience the centri holds up a LOT better to repeated pulls and maintaining power. PDs need time to recover, and cool. If they are both cool it will be a close race, but heat soak is an issue with most PDs without extensive upgrades.
The 1st race maybe close but in my experience the centri holds up a LOT better to repeated pulls and maintaining power. PDs need time to recover, and cool. If they are both cool it will be a close race, but heat soak is an issue with most PDs without extensive upgrades.
Last edited by Unreal; 01-31-2016 at 06:10 AM.
01-31-2016, 08:27 AM
#44
Supporting Vendor
And a lot of the newer PD blowers are limited by pull/drive system. I believe the small pulley setup you can do on the c7 maggie won't make close to 700rwhp. I believe CPR maxed one out.
The 1st race maybe close but in my experience the centri holds up a LOT better to repeated pulls and maintaining power. PDs need time to recover, and cool. If they are both cool it will be a close race, but heat soak is an issue with most PDs without extensive upgrades.
The 1st race maybe close but in my experience the centri holds up a LOT better to repeated pulls and maintaining power. PDs need time to recover, and cool. If they are both cool it will be a close race, but heat soak is an issue with most PDs without extensive upgrades.
01-31-2016, 12:29 PM
#45
Le Mans Master
Member Since: Dec 2005
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Best of luck in making YOUR decision.
https://www.corvetteforum.com/forums...challenge.html
01-31-2016, 04:04 PM
#46
Click the link below for the thread in C6 section that lists ET's and MPH...fastest in each mod categories and engine size. The top cars will have centri or twin turbos. The Magnuson the OP installed is the best developed so far but a good case could be made for the Callaway unit as well. The centris have been making low ET's high MPH for long time...PD blowers not so much. The statistics don't lie but it's up to owner preference. Some owners of PD blowers may feel a little "butt hurt" but this is reality if we're talking ET and MPH and if you're talking 1/2 mile - 1 mile pulls a PD blower will need a lot more support to keep from heat soaking and pulling timing. If and when PD blower manufactures find a way to make the housings from a composite like Zytel or other it will help a great deal managing heat soak. The way it looks now the auto manufacturers will replace the PD's on Corvettes, Hellcats, etc.. with TT's as seen on the Caddy ATS-V and on the upcoming Caddy TT V8 4.2L in the CT6. It's a good bet that Corvette and Camaro will receive a TT V8 in the future as compared to the PD that contributes to overheating issues with C7 ZO6 on roadcourse events. The PD 1.7L blower is not the sole source of this issue but definitely a contributor. This will be argued but do the research and make you own assessment. I've driven all three TT, PD and centri.
Best of luck in making YOUR decision.
https://www.corvetteforum.com/forums...challenge.html
Best of luck in making YOUR decision.
https://www.corvetteforum.com/forums...challenge.html
Thx
I pretty much decided now lol
01-31-2016, 05:44 PM
#47
Le Mans Master
If you want big power and 10+ psi, absolutely go centrifugal. If you don't want to run meth and are good with 650ish, the Heartbeat is a winner. Here's an interesting thread from a guy that's had both. He knows his stuff just a little too. https://www.corvetteforum.com/forums...-stock-c7.html
01-31-2016, 06:42 PM
#48
If you want big power and 10+ psi, absolutely go centrifugal. If you don't want to run meth and are good with 650ish, the Heartbeat is a winner. Here's an interesting thread from a guy that's had both. He knows his stuff just a little too. https://www.corvetteforum.com/forums...-stock-c7.html
I don't want to use meth just cuz I will always have to add it but I will have to get it and in the future to add the lt4 injectors and pump to eliminate the meth
And maybe forged Pistons down the road if I ever add more power
I just wanted to see which was faster on a centi or roots style with 700whp
Seems like there both good just the centi will make higher traps and better highway pulling which is we're I like my power
01-31-2016, 07:18 PM
#50
Le Mans Master
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Likely whatever power you make with whatever blower/turbo you choose.....you will want more power. Boost is addictive so don't try to fool yourself and say "I only want xxx power". I guarantee if you have money or credit you'll spend it for more power. AND, the easier power is to gain as in pulley swap and meth the sooner you will do it. It's just the way it is in the world of forced induction. You'll never know how much power is enough until you go past it then back it down some.
01-31-2016, 07:49 PM
#51
Le Mans Master
Sometimes enough is enough though. Whether you reach the point of "I'm not spending any more" or just decide that it doesn't make any sense to add more power. Not everyone is a power crazed maniac that absolutely can't get enough. If you know you're "that guy" that can't get enough, plan accordingly 
01-31-2016, 08:33 PM
#52
Le Mans Master
Member Since: Dec 2005
Location: Port Arthur, Texas 77642
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Sometimes enough is enough though. Whether you reach the point of "I'm not spending any more" or just decide that it doesn't make any sense to add more power. Not everyone is a power crazed maniac that absolutely can't get enough. If you know you're "that guy" that can't get enough, plan accordingly
https://en.wikipedia.org/wiki/Pandora%27s_box
01-31-2016, 08:41 PM
#53
Le Mans Master
Well, we'll have to agree to respectfully disagree on this one. There's a huge amount of Vettes out there that are stock or minimally modded. Just because someone wants more power doesn't mean they're going to become obsessed and never be able to say enough is enough. I've seen it both ways. Good news is that we all have options.
01-31-2016, 08:43 PM
#54
Team Owner
I agree with OMH. 99% of blown vettes I see out there are just blower/headers, 550-600rwhp.
Then again, the average age of owners is probably 70 on all those cars.
Then again, the average age of owners is probably 70 on all those cars.
01-31-2016, 08:52 PM
#55
Burning Brakes
They say 10-12 hours. Ha. If this was installed in 10-12 hours I'd be concerned that something was missed. Try 40-50 for me. But I really took my time to inventory parts and read through each section before starting that section. I was in no hurry and made it fun. Nothing worse than rushing and having to backtrack later.
Overall very straight forward. Nothing you can't do yourself if you take your time. The instructions were the best. Every step very detailed with a photo for each step. 279 steps in all. That's how detailed. None of this "step 1 - remove engine, step 2...". The hardest part was to set the supercharger. It's reasonably heavy. The instructions show two guys setting it on. Yeah, I suppose. But the trick is it has to tuck under the cowl by the windshield. Holding it at a weird angle and not banging it into the intake might be tricky. I bought a $79.00 (use a coupon) overhead hoist from Harbor Freight to hold the weight while I easily positioned it. Was way easy that way.
The front bumper removal is not too bad if you figure out that the last part is to lift the bumper slightly and loosen the two bolts on the remaining bracket. The instructions show this. If you try to just pry it off might end badly. How many times do we pull on something and the damn plastic clip breaks ruining an expensive part. The only part in the instructions that needs updated is they show removing the wheels and wheel liners to remove the bumper. NOT needed and adds a-lot of unnecessary work. They should remove those 10 steps.
The stock tune they provided has the cooling fan running all the time. IMO that’s not needed. If the ECT is maintaining, I don’t need the fan roaring. They modified it for me and that resolved that. They have been very responsive with tunes - typically same day.
Overall very straight forward. Nothing you can't do yourself if you take your time. The instructions were the best. Every step very detailed with a photo for each step. 279 steps in all. That's how detailed. None of this "step 1 - remove engine, step 2...". The hardest part was to set the supercharger. It's reasonably heavy. The instructions show two guys setting it on. Yeah, I suppose. But the trick is it has to tuck under the cowl by the windshield. Holding it at a weird angle and not banging it into the intake might be tricky. I bought a $79.00 (use a coupon) overhead hoist from Harbor Freight to hold the weight while I easily positioned it. Was way easy that way.
The front bumper removal is not too bad if you figure out that the last part is to lift the bumper slightly and loosen the two bolts on the remaining bracket. The instructions show this. If you try to just pry it off might end badly. How many times do we pull on something and the damn plastic clip breaks ruining an expensive part. The only part in the instructions that needs updated is they show removing the wheels and wheel liners to remove the bumper. NOT needed and adds a-lot of unnecessary work. They should remove those 10 steps.
The stock tune they provided has the cooling fan running all the time. IMO that’s not needed. If the ECT is maintaining, I don’t need the fan roaring. They modified it for me and that resolved that. They have been very responsive with tunes - typically same day.
01-31-2016, 09:46 PM
#56
Heel & Toe
Thread Starter
Well, we'll have to agree to respectfully disagree on this one. There's a huge amount of Vettes out there that are stock or minimally modded. Just because someone wants more power doesn't mean they're going to become obsessed and never be able to say enough is enough. I've seen it both ways. Good news is that we all have options.
ps. I'm decades under 70
Last edited by sagertat; 01-31-2016 at 10:07 PM.
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01-31-2016, 09:55 PM
#57
Heel & Toe
Thread Starter
I love doing mods on my own or just basic maintenance work on my own if I can. The gratification afterwards is always the best - but at the same time I feel like I may screw something up and then be sorry I even tried. 279 steps? Sounds very time consuming and in depth.
If you or anyone else decides to go for it, I'm happy to answer questions.
Last edited by sagertat; 01-31-2016 at 10:12 PM.
04-17-2017, 12:12 PM
#58
Wasn't sure if I should PM the OP or revive this old thread...Anyway, I just ordered the Magnuson Heartbeat for my 2016 Z51 and was wondering how your vette had been doing with it. Any major problems?
I would also love to do it myself but I'm having it done by certified installer so I can get the Magnuson power train warranty...
Thanks,
Pj
I would also love to do it myself but I'm having it done by certified installer so I can get the Magnuson power train warranty...
Thanks,
Pj
04-17-2017, 12:18 PM
#59
Heel & Toe
Thread Starter
Wasn't sure if I should PM the OP or revive this old thread...Anyway, I just ordered the Magnuson Heartbeat for my 2016 Z51 and was wondering how your vette had been doing with it. Any major problems?
I would also love to do it myself but I'm having it done by certified installer so I can get the Magnuson power train warranty...
Thanks,
Pj
I would also love to do it myself but I'm having it done by certified installer so I can get the Magnuson power train warranty...
Thanks,
Pj
The following 2 users liked this post by sagertat:
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