*** Special on Magnuson Heartbeat this Fall **
07-07-2018, 11:26 AM
#1841
Interesting (to me at least) about your boost number. I have a 90mm, with a stock HB, and have ~8.3#'s boost. I also have a full ZR1 exhaust, 3" off-road catless X-Pipe with the 3" Corsa axle backs (which do not have the 2.5" restriction like the stock ZR1 & Z06 NPP mufflers).
I'm thinking that my boost level would be ~8.5? with the stock 2.5" stock GS exhaust?
So, I'm thinking your 7.4 psi boost (with a smaller pulley) is due to your Cam & headers?
My mechanical experience with compressors would lead me to think that at 7.4# of boost, the "load" or "resistance" or "parasitic" loss is *LESS*, thus you are less likely to experience belt slip?
Meaning the resistance to get that intake charge in is *easier*...which equals less load on the blower = less potential of belt slip?
That's based on my D- grade average in High School in the late 70's expert opinion...
My plan if I do flex fuel is an 87mm with a 10% OD HB, Dayco tensioner, cam and same exhaust as I have now (with gutted cats).
Theory is that will give me less power but *might* not expose me to major belt slip conditions?
Or maybe I'll just get an 81mm and make a custom roller chain for the blower only LOL...
I'm thinking that my boost level would be ~8.5? with the stock 2.5" stock GS exhaust?
So, I'm thinking your 7.4 psi boost (with a smaller pulley) is due to your Cam & headers?
My mechanical experience with compressors would lead me to think that at 7.4# of boost, the "load" or "resistance" or "parasitic" loss is *LESS*, thus you are less likely to experience belt slip?
Meaning the resistance to get that intake charge in is *easier*...which equals less load on the blower = less potential of belt slip?
That's based on my D- grade average in High School in the late 70's expert opinion...
My plan if I do flex fuel is an 87mm with a 10% OD HB, Dayco tensioner, cam and same exhaust as I have now (with gutted cats).
Theory is that will give me less power but *might* not expose me to major belt slip conditions?
Or maybe I'll just get an 81mm and make a custom roller chain for the blower only LOL...
Model: 2008 GS conversion A6
Motor: Stock LS3 long block,
Mods: 1.75" KookHeaders, catless w/Borla Stingers; 226/238, 115+3 Cam
springs w/ Ti retainers; KB BAP; Racetronix harness; ID1050X Injectors, Hayden Trans Cooler
Pulley: 87MM (3.4 Griptech)
Boost: 7.5 psi max
Fuel: 93 pump w/ 16.5*
HP/Torque: 596 / 553 Mustang dyno (15+HP and 72+TQ)
Motor: Stock LS3 long block,
Mods: 1.75" KookHeaders, catless w/Borla Stingers; 226/238, 115+3 Cam
springs w/ Ti retainers; KB BAP; Racetronix harness; ID1050X Injectors, Hayden Trans Cooler
Pulley: 87MM (3.4 Griptech)
Boost: 7.5 psi max
Fuel: 93 pump w/ 16.5*
HP/Torque: 596 / 553 Mustang dyno (15+HP and 72+TQ)
The following users liked this post:
CI GS (07-07-2018)
07-07-2018, 02:03 PM
#1842
Race Director
Member Since: May 2004
Location: Raleigh, NC
Posts: 16,664
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St. Jude Donor '15
I believe Andy has moved on to a 6th gen if I remember correctly; got an email from him a few months back regarding some tuning questions
07-07-2018, 03:47 PM
#1843
Yep, that’s right. When I met up with him in Santa Barbara last year, he had sold the blower and had the Vette for sale. He said he was going to buy a new Camaro and would probably put a blower on it. The LT version of the Heartbeat blowers are kicking ***, especially with the new 2650 rotors.
07-07-2018, 03:51 PM
#1844
Interesting (to me at least) about your boost number. I have a 90mm, with a stock HB, and have ~8.3#'s boost. I also have a full ZR1 exhaust, 3" off-road catless X-Pipe with the 3" Corsa axle backs (which do not have the 2.5" restriction like the stock ZR1 & Z06 NPP mufflers).
I'm thinking that my boost level would be ~8.5? with the stock 2.5" stock GS exhaust?
So, I'm thinking your 7.4 psi boost (with a smaller pulley) is due to your Cam & headers?
My mechanical experience with compressors would lead me to think that at 7.4# of boost, the "load" or "resistance" or "parasitic" loss is *LESS*, thus you are less likely to experience belt slip?
Meaning the resistance to get that intake charge in is *easier*...which equals less load on the blower = less potential of belt slip?
That's based on my D- grade average in High School in the late 70's expert opinion...
My plan if I do flex fuel is an 87mm with a 10% OD HB, Dayco tensioner, cam and same exhaust as I have now (with gutted cats).
Theory is that will give me less power but *might* not expose me to major belt slip conditions?
Or maybe I'll just get an 81mm and make a custom roller chain for the blower only LOL...
I'm thinking that my boost level would be ~8.5? with the stock 2.5" stock GS exhaust?
So, I'm thinking your 7.4 psi boost (with a smaller pulley) is due to your Cam & headers?
My mechanical experience with compressors would lead me to think that at 7.4# of boost, the "load" or "resistance" or "parasitic" loss is *LESS*, thus you are less likely to experience belt slip?
Meaning the resistance to get that intake charge in is *easier*...which equals less load on the blower = less potential of belt slip?
That's based on my D- grade average in High School in the late 70's expert opinion...
My plan if I do flex fuel is an 87mm with a 10% OD HB, Dayco tensioner, cam and same exhaust as I have now (with gutted cats).
Theory is that will give me less power but *might* not expose me to major belt slip conditions?
Or maybe I'll just get an 81mm and make a custom roller chain for the blower only LOL...
Yeah, I’m full of good ideas, ain’t I?
07-07-2018, 05:53 PM
#1845
Le Mans Master
Yep, that’s right. When I met up with him in Santa Barbara last year, he had sold the blower and had the Vette for sale. He said he was going to buy a new Camaro and would probably put a blower on it. The LT version of the Heartbeat blowers are kicking ***, especially with the new 2650 rotors.
07-07-2018, 06:52 PM
#1846
Burning Brakes
Interesting (to me at least) about your boost number. I have a 90mm, with a stock HB, and have ~8.3#'s boost. I also have a full ZR1 exhaust, 3" off-road catless X-Pipe with the 3" Corsa axle backs (which do not have the 2.5" restriction like the stock ZR1 & Z06 NPP mufflers).
I'm thinking that my boost level would be ~8.5? with the stock 2.5" stock GS exhaust?
So, I'm thinking your 7.4 psi boost (with a smaller pulley) is due to your Cam & headers?
My mechanical experience with compressors would lead me to think that at 7.4# of boost, the "load" or "resistance" or "parasitic" loss is *LESS*, thus you are less likely to experience belt slip?
Meaning the resistance to get that intake charge in is *easier*...which equals less load on the blower = less potential of belt slip?
That's based on my D- grade average in High School in the late 70's expert opinion...
My plan if I do flex fuel is an 87mm with a 10% OD HB, Dayco tensioner, cam and same exhaust as I have now (with gutted cats).
Theory is that will give me less power but *might* not expose me to major belt slip conditions?
Or maybe I'll just get an 81mm and make a custom roller chain for the blower only LOL...
I'm thinking that my boost level would be ~8.5? with the stock 2.5" stock GS exhaust?
So, I'm thinking your 7.4 psi boost (with a smaller pulley) is due to your Cam & headers?
My mechanical experience with compressors would lead me to think that at 7.4# of boost, the "load" or "resistance" or "parasitic" loss is *LESS*, thus you are less likely to experience belt slip?
Meaning the resistance to get that intake charge in is *easier*...which equals less load on the blower = less potential of belt slip?
That's based on my D- grade average in High School in the late 70's expert opinion...
My plan if I do flex fuel is an 87mm with a 10% OD HB, Dayco tensioner, cam and same exhaust as I have now (with gutted cats).
Theory is that will give me less power but *might* not expose me to major belt slip conditions?
Or maybe I'll just get an 81mm and make a custom roller chain for the blower only LOL...
The following users liked this post:
Chiselchst (07-09-2018)
07-07-2018, 11:22 PM
#1847
Instructor
Wow, nice torque jump! I imagine your horsepower didn't increase that much because you ran out of fuel. WIth the proper fuel system and better fuel I bet you'd crack 625 or 650 hp easily !
Last edited by Brewdog; 07-07-2018 at 11:23 PM.
07-08-2018, 12:19 AM
#1848
Le Mans Master
With the 81mm pulley, similar blower cam, and bolt ons, My boost was right at 10psi. Seemed like it peaked at 10psi at 3500 rpm. 9.75ish everywhere else during a run. Yours probably would be slightly less due to your slightly larger blower pulley and slightly larger camshaft. 9.5psi would be a good guess.
The following 2 users liked this post by old motorhead:
Chiselchst (07-09-2018),
ls1wolf (07-08-2018)
07-08-2018, 12:33 AM
#1849
Ah, okay. If I recall correctly, when I spoke to him, he was in the fence about whether to buy a new ZL1 or a 1LE and put a blower on that. I like that Magnuson offers a Heartbeat upgrade for those dinky little 1750 blowers that come on the new LT motors.
07-08-2018, 04:47 AM
#1850
It's going to be interesting to see how the 2650s work on the LT4 engine that's for sure! The Coyote guys have already seen a big increase in power compared to the 2300! And that's on the same boost.
Magsuson are also supppsed to be working on one for the LS as well!...
Magsuson are also supppsed to be working on one for the LS as well!...
07-08-2018, 09:15 AM
#1851
Burning Brakes
It's going to be interesting to see how the 2650s work on the LT4 engine that's for sure! The Coyote guys have already seen a big increase in power compared to the 2300! And that's on the same boost.
Magsuson are also supppsed to be working on one for the LS as well!...
Magsuson are also supppsed to be working on one for the LS as well!...
be patient waiting... if it ever happens for our platform
07-08-2018, 10:37 AM
#1852
It's going to be interesting to see how the 2650s work on the LT4 engine that's for sure! The Coyote guys have already seen a big increase in power compared to the 2300! And that's on the same boost.
Magsuson are also supppsed to be working on one for the LS as well!...
Magsuson are also supppsed to be working on one for the LS as well!...
07-08-2018, 10:38 AM
#1853
07-08-2018, 12:07 PM
#1854
Burning Brakes
The following 2 users liked this post by ls1wolf:
Chiselchst (07-09-2018),
old motorhead (07-08-2018)
07-09-2018, 12:34 AM
#1855
07-09-2018, 02:35 PM
#1856
07-09-2018, 10:58 PM
#1857
And if the hype is true, I love the same boost but with less temperature...
Not a physics guys, but compression = increased temperatures (regardless). Must be due to less friction? Dunno...
Not a physics guys, but compression = increased temperatures (regardless). Must be due to less friction? Dunno...
Yep, Magnuson already has the 2650 blower making serious power on their twin throttle body Gen 6 Camaro. It’s making well over 1000whp, from what they’ve reported recently. Be interesting to see how well it works with a more conventional single 108mm SW TB on a SBE LT motor.
07-09-2018, 11:38 PM
#1858
Le Mans Master
My guess would be bigger/more efficient intercooler and heat exchanger. Maybe a higher volume coolant pump thrown in the mix too. A bigger, slower turning blower could sure help some, but I'm guessing that's not where the big improvement is.
The following users liked this post:
Chiselchst (07-11-2018)
07-10-2018, 10:15 AM
#1859
Last edited by CI GS; 07-10-2018 at 10:26 AM.
07-10-2018, 01:12 PM
#1860
Le Mans Master
Yeah, but there’s no way in hell I’m going to spend AU$12,000 (~USD9,000.00) on one of those and, worse yet, then pay probably nearly half that amount again in freight to ship it halfway around the world, through the US and then on to me in the Caribbean and 27% import tax on top of that. For cheaper than that, I could forge my motor and throw a centri on it and make more power.