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Old 07-12-2019, 07:46 AM   #29
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Without overdriving the 2650, using the 103mmTB, RF Big Gulp, 2" ARH, replace both cats with a single resonator on each side, e85mix, and Tune. Is that enough to get 725-750rwhp, or am i gonna have to do a cam to get there? Also, am i hurting myself going 2" ARH vs 1 7/8" ?
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Old 07-12-2019, 11:01 AM   #30
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That Edelbrock IC is HUGE!!! HA!!! WOW!!! Good find. I tried, but, obviously, failed. It seems like the Maggies are similar in thickness, though, I'm wagering the Edelbrock is thicker. The one thing we may never know is the efficiency of either. How well does one pass air and allow the coolant to tumble and cool as it passes through the core?... I don't care if one is bigger if it blocks flow and doesn't actually exchange the hot compressed air. It's no wonder how tall the Edelbrocks are after seeing that.

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Originally Posted by IneedAZ View Post
Without overdriving the 2650, using the 103mmTB, RF Big Gulp, 2" ARH, replace both cats with a single resonator on each side, e85mix, and Tune. Is that enough to get 725-750rwhp, or am i gonna have to do a cam to get there? Also, am i hurting myself going 2" ARH vs 1 7/8" ?
According to Mike at Magnuson, his car is completely stock (though that CAI is a GMPP CAI), minus the obvious tuning and blowers. He stated all the numbers above were on a stock car (save the CAI mentioned), including stock exhaust, engine, etc. I think he was running about 15-psi with the 2650 at 720-plus RWHP, so if you add headers, you'll probably make that 750. I don't know how he wasn't running out of fuel, but I bet he was on the knife's edge. It looks like man tuners are saying the cats' really heat-up on the OEM exhaust, causing early knock/timing retard, so any more than what you're looking for seems to be at both near stock LT4-fueling limits and exhaust-flow limits. That's all conjecture and from what I can gather reading related-posts.
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Old 07-12-2019, 11:48 AM   #31
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He wont get that far with a mix of e85. will need one of the following; meth, cam, LPE big bore...something besides LT4 fueling to run a mix of E @ 15psi. He could get by with E50 and 10-11psi.
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Old 07-12-2019, 11:54 AM   #32
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Quote:
Originally Posted by toohighpsi View Post
2 weeks ago I would have agreed with you 100%. Now after running the Magnuson 2650 on my LT4, I can tell you I was wrong. I am making 100 HP more on straight 91 octane (no water/meth) with the 2650 than I was with the 2300.
I honestly expected no more than 20 HP from the swap.

Attachment 994081

Really going to be interesting to see how the LT1 responds to this unit. We'll be running today, but will probably not get the dyno work finished until the weekend.
You ran the 2650 +3 psi over the 2300, why would you only expect 20hp?
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Old 07-12-2019, 12:05 PM   #33
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They both look great. I do like the full Edelbrock solution a little better, it would also appear that the Edelbrock runner after the intercooler is longer. But this is like asking which supermodel I want to date. Both are super looking.
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Old 07-12-2019, 02:14 PM   #34
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Here’s a close up of those longer Eforce runners curtesy of Stock_AMG_and Z06. He has got a sweet fuel system. The runners really don’t seam that long to me. Does anyone have any pictures of the Magnum lid underside? I’d like to see how much more clearance there is on that setup. I keep reading it’s better than the Edelbrock but I can’t tell myself
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Old 07-12-2019, 03:22 PM   #35
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Quote:
Originally Posted by ramairroughneck View Post
Here’s a close up of those longer Eforce runners curtesy of Stock_AMG_and Z06. He has got a sweet fuel system. The runners really don’t seam that long to me. Does anyone have any pictures of the Magnum lid underside? I’d like to see how much more clearance there is on that setup. I keep reading it’s better than the Edelbrock but I can’t tell myself
If you haven't already, that video I posted above might show a little bit of what you're looking for. It's not going to show you as good as the images you shared, but it might help a bit.
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Old 07-13-2019, 09:21 AM   #36
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nice thread..
so lets talk about the whine. the the 2300 I do not hear any whine and love to hear it, regardless of rotofab etc.... with this new guy, (Maggie) is the whine more noticeable?
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Old 07-13-2019, 12:54 PM   #37
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My P1 centri had a nice whine, do be honest my D1X sounds like an old pencil sharpener. I should have gotten the quite gear set.... LOL. I change oil 3x and look for stuff in the oil for the D1X... nope. it just sounds like an old manual pencil sharpener..

The runner length does look short.. the Maggie has to be even shorter IMO as the intercooler blocks look to sit deeply in the runner manifolds. One advantage of a Centri setup is the intake manifold runner length, the PD setups were changed (in part) to a lower blower in the V so that the intake runners could be lengthened (along with the need to put in an intercooler).
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Old 07-13-2019, 08:37 PM   #38
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Quote:
Originally Posted by oneredry View Post
nice thread..
so lets talk about the whine. the the 2300 I do not hear any whine and love to hear it, regardless of rotofab etc.... with this new guy, (Maggie) is the whine more noticeable?
Get the hood I have and the 2300 sings like crazy.

I have even lowered boost and it is awesome...unplanned benefit from my hood.
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Old 07-13-2019, 09:34 PM   #39
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Since we are talking about the two blowers, has anyone seen either at the track to compare actual performance data?
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Old 07-13-2019, 10:06 PM   #40
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Also on the gains posted, are they uncorrected, corrected STD, or corrected SAE? if uncorrected, those gains can be skewed if the weather is hotter or cooler, when each dyno run was recorded etc...

-Don
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Old 07-13-2019, 10:34 PM   #41
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Also on the gains posted, are they uncorrected, corrected STD, or corrected SAE? if uncorrected, those gains can be skewed if the weather is hotter or cooler, when each dyno run was recorded etc...

-Don
Sorry but a uncorrected is really the "correct" way to report FI... The really skewed comes about putting in a CF designed for a NA application. Not to mention 1 percent should be about the max added...
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Old 07-13-2019, 11:28 PM   #42
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Originally Posted by hammdo View Post
Also on the gains posted, are they uncorrected, corrected STD, or corrected SAE? if uncorrected, those gains can be skewed if the weather is hotter or cooler, when each dyno run was recorded etc...

-Don
Data is corrected STP, and fortunately we are located on the Pacific coast - basically at sea level and our average temp is in the 70s the corrections are very small (and our cars are fast)
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