SpinMonster

A customer asked what the maximum boost level that can be attained on an LS3 was.

I know its a 2300 but I'm not aware of what power can be made with the smallest pulley is and what boost it makes. He isnt interested in 500 to 550rwhp. He wants 700rwhp. Is that possible? His car is 490rwhp N/A right now.

Streetk14

Interesting question.... I wonder what the longer runners will do to a max-effort build with the E-Force. The Magnuson 2300 has been pushed to over 700 rwhp by some, but I haven't really seen the same with the Edelbrock.

If I were buying a new blower right now for my LS3, I'd look really hard at the Whipple system. While you need a new hood, I think that's a fair sacrifice in the name of power.

Z_Rocks

tjwong

Its really hard to say. I spoke with their calibration engineer a few weeks ago when I was in the middle of an installation. He says that the kit is capable of 700hp, but didn't specify whether it was wheel or crank power. I have seen that all the 599hp kits I have installed with the 3.50" pulley has had boost creep begining at around 5000 RPM. What I have seen is the boost begins at around 6 PSI and will creep up to 8 at the end of the dyno pull at 6300 to 6500 RPM. I measure the boost levels at the bypass valve connection port which is on top of the runners. I asked Edelbrock about this phenomenon and it was explained to me that their runners run out of efficiency from 5000 RPM so the air is stacking up or you can say its backing up so the boost begins to creep up because they runners can't flow any more air.

So if this is happening with a 3.50" pulley what will happen with a smaller 3 or 2.75" pulley that would be needed for the additional boost to make power beyond 600 as the kit was designed to do? They also told me that an 8 rib or even a 10 rib belt isn't required because of the way their belt run was designed with the amount of belt wrap around the pulley.

My Magnusson kit uses a custom designed 10 rib drive from LPE with a 50mm cogged rear drive with a 1.2:1 drive ratio. I am running a 8.25 crank balancer with a 2.75 main pulley and it makes 14 PSI of boost and it breaks 730hp with 10 degrees of timing and will make 650 ftlbs at 3200 RPM. Its fun to drive but I am still fighting some drivability issues. Mainly I have a split fuel trim issue that I have not found a cure for. The right bank is lean and if I richen it up enough to bring the LTFTs to near zero, the left bank is negative by a fairly large amount. I attribute this problem to the Maggies bath tub intake manifold without any runner, coupled with the amount of over drive I am running the blower and the larger camshaft with overlap is likely a lot of the cause of this phenomenon. The Edelbrock systems with the long runners see none of these problems even with cams with a bit of overlap.

I would think that the whipple with its larger displacement blowers and with its true screw design definitely has the capability of making huge power. I would have went that way but they didn't have anything for a LS7 when I made the purchase, I am not sure that they have anything even now for a LS7. If I can't get rid of these issues, I am planning on replacing the Maggie with either a LPE TT kit or a LS9 blower kit from GM that will be modified, LPE has pushed a LS9 powered Camaro into the 9s.

Motorhead-47

Camaro guys hit 700rwhp over a year ago...

http://www.camaro5.com/forums/showth...ock+E85&page=2

ExoticMotorClub

any updates on this thread? How many +700 hp cars with an eforce are out there?

Dude_man

Do you work for the umbrella corporation?

realcanuk

LOL........ I could answer all those question, but this thread is 5 years old.

Made 780 with an eforce through an auto and stall.

nullpointer

4SMOKNU

made almost 700 on meth and smaller pulley

mourat

Made 630rwhp on LS6 + meth with Corvette Eforce fitted on my buddie's CTS-V so I'm sure LS3 would be around 650+rwhp easy and that was with a 3.5 pulley.

Just installed a 3" pulley yesterday will dyno soon! Hopefully.

ExoticMotorClub

Don't work for Umbrella, but I am raising a "zombie" z06 with an eforce and forged internals. Just wondered what the competition was putting down while mine is at the machine shop. I did see a few Camaro's pushing 700 wheel with meth, but I won't be adding that just yet.

ExoticMotorClub

I was putting down ~605 rwhp with the eforce last summer. After this rebuild and the new cam, I am hoping to get a few more out of her. With the upgrades to the motor, i

should be able to turn it up without an issue.

MODS:
Eforce
Denso Radiator
ATI 8 rib damper
headers
160 degree thermostat
wiseco pistons, callies rods
compstar crankshaft, and supporting mods
katech oil pump
ide850 injectors with pigtails
red cap double pumper fuel pump
might mouse catch can, etc

GS_DAN

Why are people consistently able to pull such high numbers out of the TVS 2300 on ZR1s but the heartbeat and Eforce always seem to cap out in the 600s.

Are the ZR1s just pushing them harder?

Unreal

Manifold, intercooler, and pulley options.

Just like a TVS2300 on a mustang consistently makes 850-900rwhp because of the much larger intercooler/plenum/etc.

realcanuk

Unreal

Look at VMPs website. Boss 302 mustang, TVS2300, easy 840rwhp. So not all TVS are created equal.

realcanuk

For sure not. Even the eforce for the mustangs is a much bigger unit. Vette space too limited.

darkknight91

I have the 599 kit with a 3.5in pulley with kooks headers on an ls3... I was planning on going all the way down to a 2.75 in pulley... going to get a

new stronger tensioner from edelbrock,
90mm ATI Idler Pulley
gator back belt
1000 cc FIC injectors
KB bap
and just tune it on full e85

might also consider a magnuson heat exchanger as well to help deal with the heat

Should be interesting.....

realcanuk

Going to need a better fuel system for E85, but should make good power.