4.5 liter Whipple build
Thread Starter
On The Tree
Joined: Mar 2014
Posts: 144
Likes: 0
From: Fresno, ca
The glide won't hurt you that bad at WOT because the PD supercharger will make near flat tq, match the converter right and it will et well. The glide will hurt your driving feel at part throttle, when your not in boost and your intake runner is 1 inch long! The reason you would use smaller headers is to bolster that low feel/tq when not in boost. Additional gears require less power/throttle for a given rate of acceleration, that's why new cars are adding gears as less throttle opening=better fuel MPG.
Kurt
Kurt
You have a 1 inch long intake port, so the header can't change much on the backside. I would try and get 1 7/8 or 2 inch tube on it so it's not choked when you race it.
Kurt
Kurt
Great thread... I like that you're planning to put it in a 1st gen Firebird as opposed to everyone else who wants a Camaro.
Last edited by The Alchemist; Apr 14, 2014 at 09:56 AM.
Thread Starter
On The Tree
Joined: Mar 2014
Posts: 144
Likes: 0
From: Fresno, ca
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Thread Starter
On The Tree
Joined: Mar 2014
Posts: 144
Likes: 0
From: Fresno, ca
Just the 2.9 for now. I haven't heard any talk about front feed big blowers yet. If I do, I'll post about it.
As per your request, here is my input. On some of the 4.0 whipples we have done, especially the big boost ones, those cranks have broke the snout off. Most of them have been running the stand alone belt on the blower too. We only use the Callies Magnum on anything over 800 crank hp with a blower. Manley makes a good product, but for your setup, I would go Callies. Again, not every Manley crank has broke but we have seen it. Yes most of out stuff goes into off road vehicles and get pounded, but an engine is an engine. Just my 2 cents...
Say hi to Mike for me! And tell him thanks for sending us the mach up 4.5!
Say hi to Mike for me! And tell him thanks for sending us the mach up 4.5!
We are in the process of making a bolt on box that will relocate the throttle body to the side and accept the standard 4 bolt LS2 flange style throttle bodies. It will look like the one we already make for the 3.3 and 4.0. I know its not exactly what you were looking for, but should still help!
Thread Starter
On The Tree
Joined: Mar 2014
Posts: 144
Likes: 0
From: Fresno, ca
As per your request, here is my input. On some of the 4.0 whipples we have done, especially the big boost ones, those cranks have broke the snout off. Most of them have been running the stand alone belt on the blower too. We only use the Callies Magnum on anything over 800 crank hp with a blower. Manley makes a good product, but for your setup, I would go Callies. Again, not every Manley crank has broke but we have seen it. Yes most of out stuff goes into off road vehicles and get pounded, but an engine is an engine. Just my 2 cents...
Say hi to Mike for me! And tell him thanks for sending us the mach up 4.5!
Say hi to Mike for me! And tell him thanks for sending us the mach up 4.5!
Friend of mine has an older 3.3 whipple on his Z06, not an easy fit...lol
It made 680 on 14lbs with a **** tune, getting it retuned this month with 20lbs and a bunch of meth. Hoping to get close to 4 digits
It made 680 on 14lbs with a **** tune, getting it retuned this month with 20lbs and a bunch of meth. Hoping to get close to 4 digits
TECH Resident
Joined: Aug 2008
Posts: 910
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From: Dubai
Directly from Whipple's website, it says the 4.0 displaces 3850cc/rev which is 3.85liters per rev.
Thread Starter
On The Tree
Joined: Mar 2014
Posts: 144
Likes: 0
From: Fresno, ca
Making some progress on the parts collection. Still have a long ways to go. I now have my rotating assembly, all manley pro series. Will be 408 in displacement. Trick flow 255 LS3 heads. 10:1 compression ratio. Yella terra ultra lite rocker arms. Oh and tires, 295/55-15 M/T drag radials. Lol. A little soon for those but oh well. I feel like a kid on Christmas morning.
I'm searching for a 6liter block at the moment. Once I have the short block done, I'll start mocking up the different options for the blower so I can run the billet supercharger inlet. I may need to put a two inch spacer under the discharge plate to get the throttle body above the fire wall. Then I'll need to figure out how big of a cowl hood I'll need to run.
I'm searching for a 6liter block at the moment. Once I have the short block done, I'll start mocking up the different options for the blower so I can run the billet supercharger inlet. I may need to put a two inch spacer under the discharge plate to get the throttle body above the fire wall. Then I'll need to figure out how big of a cowl hood I'll need to run.
