[Z06JJP]

I just joined this site as there seems to be a lot more technical info compared to corvette forum, especially concerning Magnuson blowers specifically.
I’m looking at buying a Magnuson 2300 (maybe the R model if it comes out before spring/summer) for my 2016 Z06 M7 but I’m wanting to know which upper pulley I’m going to need and was wondering if someone could help me out here. Quick run down with my mods are: Innovators West 18% lower pulley, dual nozzle AlkyControl meth, low side fuel system, stage 3 Vengeance Racing cam (32% fuel lobe), 2” ARH LT headers w/no cats, Corsa exhaust, 103mm TB, Halltech CAI...so basically the car made 740 RWHP with a factory ported blower with a factory upper pulley (18% lower pulley though) running around E50 fuel, not sure about what the boost was. My question is, what size upper would I need to run when I buy the new Magnuson to maybe hit 800rwhp, and what boost would that equate to roughly? Having this lower pulley is kind of throwing a curve ball at me. I don’t see too many LT4’s on CorvetteForum running a Magnuson WITH a 18% lower so I don’t know what to expect, I want more power obviously but I don’t want to out do my fuel system either....any kind of help would be much appreciated.

[oldman]

It would be interesting to see the before and after conversion HP and PSI of boost between the two setups.

[Joshinator99]

Originally Posted by Z06JJP

I just joined this site as there seems to be a lot more technical info compared to corvette forum, especially concerning Magnuson blowers specifically.
I’m looking at buying a Magnuson 2300 (maybe the R model if it comes out before spring/summer) for my 2016 Z06 M7 but I’m wanting to know which upper pulley I’m going to need and was wondering if someone could help me out here. Quick run down with my mods are: Innovators West 18% lower pulley, dual nozzle AlkyControl meth, low side fuel system, stage 3 Vengeance Racing cam (32% fuel lobe), 2” ARH LT headers w/no cats, Corsa exhaust, 103mm TB, Halltech CAI...so basically the car made 740 RWHP with a factory ported blower with a factory upper pulley (18% lower pulley though) running around E50 fuel, not sure about what the boost was. My question is, what size upper would I need to run when I buy the new Magnuson to maybe hit 800rwhp, and what boost would that equate to roughly? Having this lower pulley is kind of throwing a curve ball at me. I don’t see too many LT4’s on CorvetteForum running a Magnuson WITH a 18% lower so I don’t know what to expect, I want more power obviously but I don’t want to out do my fuel system either....any kind of help would be much appreciated.

I’m on Corvette Forum too. I don’t want to rip them, but I’ll just say Camaro6 guys take no prisoners.

Try touching base with Ted at Jannetty Racing or Ben at Weapon X. Both super knowledgeable and work on Maggie blowers every day.

[laynlo15]

We are going to have the 2650 out in a couple months, we had one on a 2017 Z06 at Sema. With all your mods you could easily run that, the vet we had there was pretty modded out and the new 2650 fits under the hood, just have to take out the inner linner. The 2300 or the 2300r will work also. I think you'll have to work from the stock pulley, each 5mm lower in pulley size is about 2 lbs of boost, just don't know what yours will be till you get it on the dyno the first time with the stock pulley.

[Z06JJP]

Thanks for the responses. I think I would like to go with the 2300R version. Does anyone know about when they will be available? As far as the lower pulley goes, i really don’t want to have to remove that so I’m going to keep and maybe just start with the 80mm upper that comes with the new blower and maybe also buy a bigger one if they make it (85mm??), in case that combo is too much boost.

[Drsagacity]

Originally Posted by Z06JJP

Thanks for the responses. I think I would like to go with the 2300R version. Does anyone know about when they will be available? As far as the lower pulley goes, i really don’t want to have to remove that so I’m going to keep and maybe just start with the 80mm upper that comes with the new blower and maybe also buy a bigger one if they make it (85mm??), in case that combo is too much boost.

The 2300 stock cubic inches, with headers and a cam, and stock compression ratios, I had the following:

85mm - 8.5psi
80mm - 10psi
75mm - 12psi
70mm - 14psi - I didnt get to finish tuning because we ran out of injector...and started getting too cold (so couldn't get traction for street runs with regular tires). Had belt slippage too. When it warms up, we will finish tuning with alky injection or race fuel.

I was running 760whp with the 75mm pulley on pump e85 (e70)...through the a8.

Before the cam and headers, the 98mm did 5psi on the stock motor and the 95mm hit 7-8psi.

[laynlo15]

I think the 2300R should be out in late 1st quarter of 19'. Its going to be an awesome addition to the SC family, especially for stock cubes with some mods. It flows considerably more then the stock 2300. I may go with that SC myself before racing season begins in March here in the Midwest. The 2300 would be a great upgrade compared to your smaller GM supercharger, more HP/TQ, lower intake temps and an easy swap. Good luck on your choice.

[EDFHOBBIES]

I was after a whipple at 1st and heard of the 2650 coming promising lower IATs and more flow than the 2.9.. I to have the lower pulley it's 18% on LS cars and 15% on LT1/LT4 at least the ATI/lingenfelter reads that way(different balancer same blower rings between the Gens).. Anyhow whipple said that they don't offer a pulley large enough to slow the blower down for a stock fuel system.(this would be the person just swapping blowers with no cam lobe that had a overdrive on the hub) The tech said somewhere in the neighborhood of 18 psi. is where boost would be with my lower running it just like it comes out of the box to work on a LT4.

Since the Eforce 2650 is what I'm going with I called Redline and asked about the white ZL1's setup ( Upper, lower, headers, intake, and Cam). It to had 15% lower and an upper on a OEM lt4 unit which made 14 to 15 psi. (683 hp and 699 TQ). With the 2650 swapped out now and using the same 15% lower and the eforce setup out of the box with a 3.75 pulley it made the same 14 to 15 psi (Now Making 752 hp and 739 TQ)

Next was the 15% lower and 3.25 upper on the 2650 Boost jumped to 16/17 psi and now 790 hp and 815 TQ.

All the test were done on 93 and dual nozzle meth kit.

Called Magnuson for ya, talk to Tim they don't have any info really you need to send him a your pulley specs and tech will work up a chart as far as the base kit for a vette or zl1 this is the info..

Magnuson Stock 2300 for zl1 kit psi 11lbs/12lbs psi comes with a 75MM size or 2.95 just bolting this on adds 35 to 40 hp. The blower can take a 70MM they had no info if running a larger lower..


just email them your lower pulley size with what blower you want to use to get a PSI number.

PS next year for a 2650 and almost as long for the 2300R

Edelbrock is taking pre orders so they are very close for the 2650

[Z06JJP]

Thanks for the info. I’ve emailed the Magnuson sales manager back and forth a few times but calling them is almost impossible to get anyone to answer over there.

[toohighpsi]

The stock Z06 lower pulley is 8" (203mm), you have a 18% over so 8*1.18=9.44 (240mm).

For simplicity we'll look at the stock blower which I believe has about a 62mm pulley. 240/62=3.87 drive ratio so at 6600 RPM the stock blower is at 6600*3.87=25,550 RPM.

The change in blower size is 1740/2300 which is 25% larger, so to flow essentially the same amount of air you need a 25% larger pulley which would be 77.5mm.

Now this comparison can be a bit tough as the 1740 is pretty much done at 23,000 RPM, so the extra RPM you're spinning it will just pull more power from the crank with less than the usual expected gain in HP.

Since it is a PD SC, the power output is completely dependent on SC speed. There are some differences based off the efficiency of the engine (compression ratio, cam, heads etc) but these are normally pretty small. The SC completely controls the air into the engine so it determines the power the engine will make.

The TVS 2300 for LT4 ships with an 80mm pulley, using your 18% lower will result in a blower speed of about 20,000 at 6700 RPM. I expect that that should get you pretty close to your target of 800RWHP for air.

For Reference:
My stock Z06 with TVS2300 makes 740RWHP with a blower speed of 18,800 RPM.
Our LT1 416ci Camaro made 875RWHP with a TVS2300 blower speed of 20,500 RPM.

Hope that helps!

[Z06JJP]

Yes! That’s a huge help, thank you!

[Z06JJP]

One other question, I obviously don’t have the new blower yet but is there a boost port that you can get a boost reference off of for the AlkyControl box? I was reading through the install directions and noticed that the 2300 doesn’t re-use the boost bypass solenoid so it got me thinking where I would run the boost line to on the new blower? I’m also guessing that you could just completely eliminate that solenoid altogether and probably just turn that CEL monitor off in HPTuners since it would no longer be plugged in. The Magnuson instructions keep that thing plugged in put it’s just zip tied and not even bolted down anymore

[toohighpsi]

Originally Posted by Z06JJP

One other question, I obviously don’t have the new blower yet but is there a boost port that you can get a boost reference off of for the AlkyControl box? I was reading through the install directions and noticed that the 2300 doesn’t re-use the boost bypass solenoid so it got me thinking where I would run the boost line to on the new blower? I’m also guessing that you could just completely eliminate that solenoid altogether and probably just turn that CEL monitor off in HPTuners since it would no longer be plugged in. The Magnuson instructions keep that thing plugged in put it’s just zip tied and not even bolted down anymore

There is a boost port at the passengers side back of the blower.

I'd suggest using a MAF based water injection system though. I think think the AlkyControl has this option as does the AEM that I am using. Since the PD blower has such a flat boost curve a boost referenced system will give too much liquid at low speed and not enough at high rpm. The MAF based system will allow you to better match liquid flow with boost and RPM.

[laynlo15]

Thanks Mike for the explanations. I run the AEM and have had great success with it and have never had any issues.