Thread: Please don't tell my wife.....I think I'm in love again. 4.0 Whipple!

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Finally after months and months of trying to figure out which direction I was going with on my engine it's final. 4.0 Whipple. I have lots of room to grow if I want. The below links are for a fellas 04 GTO LS (408) with the 4.0 ltr. Met him on another site. He's said he got 800 hp on 12 PSI with belt slippage above 4500 rpm and IAT issues. Then bumped up to 20 psi but only gained 50.....real bad belt slippage. I think their going with a wider cog belt to fix this. Not going to be an issue for me cause I'm shooting for 550 hp max on present set-up with LS6 243 casting heads.

Pros:

Can get both the cathedral port or larger LS2 port bases. Get to keep my fuel injection. Not as big physically as the 6-71 roots I was looking at so it will all fit under the hood but because it's a 4.0 ltr, it'll still fill my engine bay due to the built in intercooler under the lobes. Whipple has a lot of pulley options. And best of all, much cheaper than the Blower Shop LS set up I was looking at.......almost half the price which will leave me more money to massage the bottom end later for more boost.

Cons: I can't find any, other than the money that I was already going to spend on either a Magnusson or Blower Shop set-up.

Anyone use Whipple themselves? I know they've been around a while and seem to have a good name.

YouTube - Broadcast Yourself.

12 PSI and 9 degrees of timing
YouTube - Broadcast Yourself.

20 PSI
YouTube - Broadcast Yourself.



BIG GRIN!

David

A few pics I found on Flikr

The first is Bills GTO with the 4.0. The sand rail kit I believe comes this way with the built in intercooler under the lobes.

The second is: left 4.0, middle 3.4, right Eaton.

Good for You!!!!
I had one on My Vette and I LOVED IT!!!!!
Enjoy

Originally Posted by 1bad32

Good for You!!!!
I had one on My Vette and I LOVED IT!!!!!
Enjoy

George,

Do you have any pictures? Mainly a good side shot where I can see where the rear pulleys end up in reference to the back of the LS valley (knock sensor) cover? Was your Vette a late model LS? Guess I should've asked that before asking the last one. Whipple's site has good diagrams and dimensions of the housing but not with the base plate. I'm trying to figure out if I have my firewall opened up enough to clear everything. I can't find a good picture of one with a side shot.

BTW, very nice Coupe!

David

LOL's. I'm tired. Been up 36 hrs.

George,

Was your intercooled? 3.4 or 4.0 ?

LOLs. I'm rambling and the screen is getting fuzzy. Better hit the sack.

David

whipple yep