Whippled 496

iTrader: (4)

Problem is the RPMs that are needed to get this blower to start making boost on an 8.1L engine are rediculous. I have a 2-3/8" blower pulley on there too ..........just another reason why the Whipple is just not getting the job done.

BigCountryx

iTrader: (3)

yeah, part throttle maggie boost feels soooo good. that was a little 112 on a 6.0

Mr. Sandog

I'm talking RPM, not time. Shouldn't the Whipple be @ full boost by 2000 RPM?

Whippled 496

iTrader: (4)

2000 engine RPM is not even close to being able to spin this blower fast enough for "full boost"...LOL. Thats what I am hoping the TVS will be able to do with some different pulley arrangements.

TieRod

I think there havin a hard time wrapping there head around how much air the 8.1l moves. LOL

thunder550

iTrader: (70)

LS motors in the 420's and 430's are making 800+ lb-ft in the low 2000 RPM range with the TVS2300. I still think there's something wrong with the setup. What size is that Whipple?

Whippled 496

iTrader: (4)

Its a standard 2.3L compressor.

James B, has had this same issue as well as a few other 8.1L people who just cant make enough boost for the 8.1L with a Whipple. If you look on Whipples site in the marine section you can see the different setups for the 8.1Ls. Their lower performance setups (5psi or less) use the W140ax (2.3L) compressor. The higher performance setups (6psi and +) use the W200ax (3.3L) compressor. So its seems apparent that Whipple also understands that the 2.3L compressor will not get the job done on these 8.1Ls over 5psi. At least not thier compressor anyway (Brian says the TVS will even though its the same size) Right Brian?....Right? You add the Air to water intercooler core to my setup and you loose a little more boost.

thunder550

iTrader: (70)

Still, I would think that at lower RPM's and part throttle you would be able to make boost. The place where I would expect to see the smaller compressor struggle is at WOT at high RPM's, not at low RPM part throttle.

Whippled 496

iTrader: (4)

You have to look at the Lysholm map to see what i mean. 7.5" crank pulley with a 2.375" blower pulley maths out to be 3.16x over driven. So 3.16 x 2000 (engine) RPM = 6320 (blower) RPM. 6320 blower RPM does not provide nearly enough air for 4.05L's of cylinder volume when you look at the 2.3L Whipple compressor MAP. I am not sure about the TVS MAP, but the ability to over drive the blower even more using the jack shaft setup, will allow for more air at lower engine RPMs thus more boost at part throttle.....I HOPE

Actually it would be cool to see a TVS cross flow chart of how much boost you would create, given cylinder volume vs blower speed if someone smarter than me (and God knows there are plenty out there) would like to do it.

thunder550

iTrader: (70)

Ahh I gotcha...I was wondering how much that thing was overdriven, doesn't sound like too much. I know the numbers that I have seen with the TVS are all overdriven to produce a peak of anywhere from 14-18 psi. I guess it would be a little soft down low if it was only peaking at 6psi.