[PureZL1]

Based on magnuson, they did 730whp on a c7zo6 with a magnuson2650/intake/103 throttle with the 90mm pulley and everything else stock.. on 16 psi how come when everyone else is going 13-14.5 psi and going lower than 700whp with more mods.. i have a intake/headers and snowperformance meth,103 mm throttle body i am wondering if anyone had a similar build could help,, where am i going with the boost on stock pulleys with the boost and power.

[Camaro1973]

There’s so many posts on this. Do a search, but in a nutshell about 700rwhp is what people get before running out of fuel. These are on a dyno jet with SAE.

Doesn’t matter what other bolt ons you have. No cam/meth your out of fuel. Low side booster pumps only do so much.

90mm pulley is roughly 14.5 psi, several factors can effect this. Like colder dense air as well as elevation. You have meth so you’ll make more power.

[PureZL1]

I actually have been doing search for days, sinister life with his zl1 he made 780 with intake/headers meth and the 2650, others are claiming 700whp with the same mods, i am just lost about who to believe, also i will be running meth with 93 oct and a jmx booster.

[IneedAZ]

Originally Posted by PureZL1

i am just lost about who to believe

Well, as I discovered the numbers vary quite a bit depending on how the numbers were presented. Uncorrected, SAE, vs STD. In my case there is nearly a 50rwhp difference in uncorrected and std.

[LiqTenExp]

There is also a large delta between dynamic and static load dynos. The delta here can be as much as 60-80 hp in the 700-800 whp range with dynojets reading higher.

[Camaro1973]

Originally Posted by PureZL1

I actually have been doing search for days, sinister life with his zl1 he made 780 with intake/headers meth and the 2650, others are claiming 700whp with the same mods, i am just lost about who to believe, also i will be running meth with 93 oct and a jmx booster.

700rwhp is about the max without a cam/meth or any type of fueling mods.


730rwhp with stock fueling sounds like a glory run, in STD, or pushing it to unsafe levels.

[juice3]

Beacuse for ever # of boost the heat increase is substantial. 30rwhp isn't worth the squeeze. Normally you see 25whp per # of boost. 700rwhp at 13# vs 730rwhp at 16# ain't worth that juice bud.

[Z OH 6]

Originally Posted by Camaro1973

700rwhp is about the max without a cam/meth or any type of fueling mods.


730rwhp with stock fueling sounds like a glory run, in STD, or pushing it to unsafe levels.

Sounds about right, Vengeance Racing told me 680whp is the max before you run out of fuel.

[Camaro1973]

Originally Posted by Z OH 6

Sounds about right, Vengeance Racing told me 680whp is the max before you run out of fuel.

You can make just a bit more with a blower like the mag 2650 as the power curve is a bit different and doesn't need as much down low.


I'm sitting right at 690 or so with the magnuson swap (90mm pulley) , headers, nw 103mm, cat back, rotofab.


Going back in the shop soon to get a cam and heads ported.

[Markoz28]

Originally Posted by Camaro1973

You can make just a bit more with a blower like the mag 2650 as the power curve is a bit different and doesn't need as much down low.


I'm sitting right at 690 or so with the magnuson swap (90mm pulley) , headers, nw 103mm, cat back, rotofab.


Going back in the shop soon to get a cam and heads ported.

It’s crazy how just adding a cam to your current build almost guarantees 100whp gain.

[scantone]

Wrong thread

[JANNETTYRACING]

The LT4 and its fuel system can put down some pretty crazy numbers when set up right 750 RWHP on a Superflow Most accurate dyno.

The JRE 125 RWHP package plus the TVS 2650 on 100 octane sunoco unleaded put down 740 RWHP at 16.5 psi.

https://www.facebook.com/60848939090...28914431266578

Great for the street or drag racing but.

But we quickly proved that it is not Road coarse worthy, Water and oil temps get way too high way too fast.

I originally wanted to add a cam to this build but customers elected to not do that.

Well after a weekend at the track I was able to convince him to add our Terminator cam package with 32% fuel lobe, and slow the blower down.

The results are over 800 RWHP with 4 PSI less boost.

https://www.facebook.com/60848939090...60709375039036

Still on the LT4 fuel system with JMS fuel system voltage booster.

Along with the impressive numbers came a track record and championship this past weekend.

Feel free to call with any questions.

[radz28]

Originally Posted by PureZL1

Based on magnuson, they did 730whp on a c7zo6 with a magnuson2650/intake/103 throttle with the 90mm pulley and everything else stock.. on 16 psi how come when everyone else is going 13-14.5 psi and going lower than 700whp with more mods.. i have a intake/headers and snowperformance meth,103 mm throttle body i am wondering if anyone had a similar build could help,, where am i going with the boost on stock pulleys with the boost and power.

In my experience, I was getting about 14-psi during Summer months. My car seems to be making around 700-RWHP, so (if that's about right) it would seem I'm probably pretty close to Magnuson's Z06 numbers. I will clearly state I don't have dyno' numbers for my car - I'm using air flow data to come to that hypothesis. I can also say, that the 14-15-pounds I was seeing was with ambient air around 80-90* (IAT2s were around up to 110* or so, and it was smoky as Hell, so air quality was terrible). With nothing more than lower air temperature (and better air quality), I was seeing around 3-pounds more, with temperatures in the low-60s. All of that to say that temperature could play a role in boost. Magnuson's shop is, if I'm not mistaken, near sea level, and ambient temperatures around there average something like 70*. If they're dyno'ing around that temperature and air quality, and you go to Arizona (for example), you aren't likely going to get the same conditions, and might see lower boost. It seems, to me, Magnuson's boost claims, for a stock LT4, on a 90mm pulley, line-up pretty well, at sea level, around 80*. If you have a stock intake/exhaust-car, that's probably about what you'll see in good DA. My car has a BG and LT5-TB, so I'm seeing a pound or two more than 14, and with cooler temperatures, a few more than that. It isn't clogged cats' (yet), because my car has a thousand miles and my car wasn't hot during those runs. Anyways - all of that to say that if you run the car, as they list it (bone stock), you'll likely see around 14-pounds near sea level around 80*. Because hardly anyone won't upgrade a blower without intake and LTs, you're probably not going to see 14-pounds.

Additionally - with Magnuson's car, that 730-RWHP was at the fueling limit, and Mike ran it out to like 7000-RPMs. That car was making around 700 to the tires, right around the OEM fuel cut-off, which is about 6600.

I'm not sure what you're getting your information from, but I'm not sure how right or wrong it is. There's another video, from a Nickey-tuner, that had a ZL1 with a BG, and LTs, and was making about 740 to the tires. Their pulley sizes were a little different, but I think they were saying they were around 16-psi and they were right on the fueling limit (the rest of the car was stock). I'd be willing to bet you could easily make that kind of power with your mods', just using the meth for cooling, rather than fueling (and more if you used it for fueling). If you run a stock lower and the 90mm upper, I believe you can make upwards of 730-750 pretty easy with those mods. Dyno-tuning will allow to car to make the power that blower is trying to make. If you don't get the VVE and MAF right, the car will fight itself. I'm not sure where you're seeing the sub-700 numbers, but it'd be interesting to see the data and the builds.

I also think that Magnuson's slightly de-tuned these blowers (at least mine) a bit. I'm not suggesting this is a wide spread-thing, or it was just mine, but it was pretty surprising, in a good way. There's a commonality that I found with mine that was very similar to what I found with my OEM-blower... Boost isn't everything...

[radz28]

Originally Posted by Camaro1973

700rwhp is about the max without a cam/meth or any type of fueling mods.


730rwhp with stock fueling sounds like a glory run, in STD, or pushing it to unsafe levels.

It seems I'm around 700 and I'm pushing the edge. If my EQ-corrections get out much more than about 5% rich, I'm pushing mid-6s in PW and seeing my low side start to drop.