400ci94mm

Why can't the larger Whipple 2.9L make as much power as the smaller Magnuson 2650 (2.65L).....? ((or the Harrop 2650, same thing made in Australia))

I'm wanting to go with a Positive Displacement SC'er. Front feed air inlet is a must, for fitment reasons. But I want at least 1,000 RWHP.

Magnuson 2650 has made 1,123 RWHP on a new Camaro.

I have a fully forged 390ci LS (LQ9).
10.4:1 cr
Full time E85 fuel will be used
Stage 2 WCCH LSA heads
1 7/8" LT headers
4L80E tranny (3200 triple disc FTI stall)
3 inch exhaust off each collector, to a Y pipe, back to my Magnaflow muffler.
One 3" electric cut-out at the Y pipe.

1998 Trans Am WS6

Can the 2.9L Whipple make over 1,000 RWHP....?

Thanks,
LG

Petraszewsky

I don’t think you’ll get 1000RWHP out of the 2.9. 1000hp crank yes...I’m trying to push my 427 w/ Whipple 2.9 to 850-900 Rwhp on E85 and over 1000rwhp with nitrous.

400ci94mm

So does it mean the Magnuson 2650 (which is smaller)......is just a much better SC'er?

Magnuson 2650 made 1,123 RWHP on a 427ci LS......and its not maxed out.

Or do the Liters of output mean nothing really....?

I'm even having trouble finding any set ups on youtube.....using the Whipple 3.3L that cannot make 1,000 RWHP.....

I don't understand....

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Petraszewsky

Part of it is the efficiency of the blower itself. I have detailed specs of about 20 or so Whipple 2.9 builds and most are in the 930-1000hp crank range. The 2.9 runs out of steam up top. For 1000+rwhp a 4.0 or 4.5 is needed. The 3.3 might do it as well.

400ci94mm

Ok.

Only problem with the 3.3, 4.0, 4.5.....they are all 2.5-3 inches taller than the 2.9. So it will not fit in my 1998 WS6 Trans Am.

I guess I need to wait till the Edelbrock and Magnuson 2650 SC'ers come available for our LS engines.....

Thanks.

old motorhead

I wouldn't wait on Magnuson to build a 2.6L blower for LS engines. Last I heard they had no plans to do so. My info may be old though. They never made a Heartbeat for catty port heads. There's precedent right there. Harrop does build one for the LS3, but the intake is backasswards for what we need. Maybe Edelbrock will fill that niche.

400ci94mm

The Harrop 2650 is perfect for our cars....the front air inlet hooks directly to my Trans Am factory front air lid. Works perfect for Vettes too. Problem is....they gave me a $9,500 price, delivered to Florida.

Magnuson already has the 2650 for the LS engines.....this Camaro made 1,123 RWHP....and has more in it. Magnuson said latee this year they will make them available to the public.

The SC'er does NOT really sit up that high....they did that on purpose just for WOW factor.

Fast forward to 1:20.....then start watching. Maggy reps explain the LS 2650 SC'er.

Harrop and Magnuson works on any LS engine from 1997-present.....as long you use rectangular port heads....LS3, LSA, LS7 or any after market Rect port head.

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lt1z

Unreal

And ls7 head ports are different than l3/9/a

400ci94mm

Thats right.....Magnuson said August for the LS engine 2650 SC'er......but not holding my breath.

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lt1z

The release schedule is Hellcat, LT and then LS down the line but I wouldn't expect to see LS this year.

400ci94mm

After watching dozens of youtube videos.....it really seems like the Whipple SC'ers are very inefficient.....or just very bad SC'ers.

I'm seeing a LOT of videos of LS 427's and other badass engines with Whipple 3.3, 4.0 and 4.5 SC'ers......hardly getting 900 RWHP.....and some getting very close to 1,000 RWHP. Thats terrible for such HUGE SC'ers......

Compared to the much smaller Magnuson 2650 and the Harrop 2650......these are making over 1,100 RWHP.

Anyone know why Whipple is falling so far short.....?

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Unreal

Because your data is skewed and it isn't about the blower as much as the whole system.

A camaro kit is not a corvette kit. Intercooler, manifold, etc is vastly different. Same reason a TVS 2300 makes 1000+ on a mustang and struggles to hit 800rwhp on a vette.

One example of a non-production, 2650 made over 1100rwhp, according to the manufacturer, on a camaro with a complete unstreetable setup. That is not comparable to a vette kit.

ysb02

Unreal

And mustangs crack out 1000+ with them. It isn't the blower, it is the complete package. So who knows what you are doing on a 4th gen fbody. Any of those blowers, Whipple 2.9, TVS 2300, or TVS2650 can make over 1000rwhp, if they have the correct setup.

400ci94mm

But, there's no way a Mustang engine is more efficient than an LS V8...maybe equally if that........to make 200 more RWHP with the same size SC'er. Impossible.

Unless it is like the Whipple rep said to me.....unless someone builds a very expensive all out race engine to compliment the Whipple 2.9....there is no possible way it will make 1,000 RWHP....and even then it will be hard. Whipple said if I want 1,000 RWHP I will need a larger one like the 3.3 or 4.0......

Also, Mustang dynos are not so good, as compared to a Dynojet. They typically read higher than actual RWHP. I have proven that long ago (back in 2002) when I had one of the first 436ci LS stroker engines making 500 RWHP/500 RWTQ.

I knew several local Mustang Cobra guys that dynoed 550-575 RWHP....and I walked them easily. Absolutely no way they really had that HP.......

I'm still looking for any Whipple 2.9 making 1,000 RWHP on anything........

Even Steve Morris Race Engines...on a professionally built, incredible 427ci LS..with very good parts.....only makes 940 FWHP. About 800 RWHP (15% drivetrain loss). Don't know how anyone can make another 200 HP unless they use some exotic parts, $8,000 All-Pro heads, and a solid roller. Then maybe it'll hit 1100 FWHP.

Now....the smaller TVS2300....makes the same 800 RWHP regularly.....Hawks Motorsports does them all the time.

So this is a real good example of a Whipple 2.9 on a badas 427ci......larger SC'er than a TVS2300 that makes the same power on a smaller stock cube LS engine.

Doesn't make sense.

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400ci94mm

I can't find any cars or videos anywhere that make 1,000 RWHP with a TVS2300.

The guy who owns Hawks Motorsports makes 800 RWHP with a TVS2300 and his engine is built nicely.

Who makes 1,000 RWHP with a TVS2300...any kind of car.....?

Whipple 2.9......as far as I can see....that does not exist anywhere...I'm still looking. And I think when I find it, it will be an amazingly expensive, exotic build.

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400ci94mm

Where can I find this guy to ask questions?

Links to videos...?

The highest RWHP CTS-V with a Heartbeat 2300 SC'er (FULLY PORTED) is 907 RWHP. Fully built 416ci stroker, 2" LT headers and full 3" exhaust, big 5" intake pipe, 102mm TB, and E85 fuel. And a 6 speed.......

Thats a big money set up....and a fully ported SC'er.


I doubt anyone is getting 1,000 RWHP. But maybe with ice, solid roller and higher compression.

But it makes my point......back to the Whipple discussion. The Whipple 2.9 can't make as much as the Heartbeat 2300......

So....Whipple SC'ers are simply not that good. And again, as the Whipple rep said....he thinks it will be impossible to make 1,000 RWHP with a Whipple 2.9. So far....hes exactly right.

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Petraszewsky

400ci94mm

Thats even worse than just figuring the rule of thumb 15% drivetrain loss.

And Steve Morris can build a seriously nice engine....

A Normally Aspirated 454 LSX, built properly....can make 715 RWHP....LOL

But I'm not just ragging on Whipples.....they are what they are. They are extremely inefficient SC'er. I'm just wondering why?

Even the HUGE 3.3....a LITER larger than the 2300 SC'ers....can hardly go 800 RWHP. They can, but its not easy.

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