SS Viper

[BlackMax]

JP:

I have been watching your project with great interest. My Gen II has an after market cam and I have the same fuel in-balance issue as you described with your manifold but with the stock manifold. I know you had to keep the TB's in the stock location but had you ever considered how a system might work with the TB's air dumping into the center of the manifold? I am thinking about cutting off the top of a stock manifold and building a cover that would accomplish that.
Thought I would check around before cutting metal. The Gen II manifold has the exact same air flow problems we had in the old days with the Hemi cross ram manifold.

Thanks

Jim
hartsnet@yahoo.com

[theman440]

Bitchin' Car.

[JP]

Yes, we had that design on the drawing board, and if I don't miss mind I think there have been some vintage intake manifolds/plenums with similar designs as you have in mind. We would probably have been better of with the injectors moved closer to the valve but In our case isn't the performance and driveability in low rpms a big issue, we are more interested in 4500 and up, so only by tweaking the fuel flow solved most of our problems. But for a street type of car would our manifold be a total failure...
The issue with the stock manifold can easlilly be solved with a after market ECU...no problemo :-) Just remove som fuel for the rear injectors at low and mid rpm.
What ECU are you running now?

Originally Posted by BlackMax

JP:

I have been watching your project with great interest. My Gen II has an after market cam and I have the same fuel in-balance issue as you described with your manifold but with the stock manifold. I know you had to keep the TB's in the stock location but had you ever considered how a system might work with the TB's air dumping into the center of the manifold? I am thinking about cutting off the top of a stock manifold and building a cover that would accomplish that.
Thought I would check around before cutting metal. The Gen II manifold has the exact same air flow problems we had in the old days with the Hemi cross ram manifold.

Thanks

Jim
hartsnet@yahoo.com

[Glenn Hayes]

Now this is a WILD project!

I tip-my-hat to you for your persistence.

[BlackMax]

My car had fuel rails and large top loader injectors which flowed large amounts of fuel. I changed to a stock intake manifold and stock injectors. It also had a Roe Racing VEC II add on computer which was very difficult to manage so I removed it and thought I would try to manage the air flow instead. Do you know of an ECM available that would replace the stock one? Most shops that claim they can supply one are very expensive with no assurances of success.

Thanks for responding.

Jim

Originally Posted by JP

Yes, we had that design on the drawing board, and if I don't miss mind I think there have been some vintage intake manifolds/plenums with similar designs as you have in mind. We would probably have been better of with the injectors moved closer to the valve but In our case isn't the performance and driveability in low rpms a big issue, we are more interested in 4500 and up, so only by tweaking the fuel flow solved most of our problems. But for a street type of car would our manifold be a total failure...
The issue with the stock manifold can easlilly be solved with a after market ECU...no problemo :-) Just remove som fuel for the rear injectors at low and mid rpm.
What ECU are you running now?

[JP]

The stock injectors flow good up to about 600hp, so with a cam swap only that sounds like over doing it.
In general the VEC was a pain in the *** Piggy Back system, it's a Swedish system and our other Super Street Viper was a test Mule for it...did never work as expected.
There is a few systems out there that proclaim they work with the Viper, but most of them have errors, bad interfaces or have intermittent problem.
If I were you I would buy the new Infinity system from AEM when its available for the Gen2 Viper.
It's a $2-3K deal but it will help you.
Just find a experienced AEM turne with a Chassi Dyno, spend a half a day there and your Viper will Rock!

Btw, did you add headers when changing Cam Shaft?

Originally Posted by BlackMax

My car had fuel rails and large top loader injectors which flowed large amounts of fuel. I changed to a stock intake manifold and stock injectors. It also had a Roe Racing VEC II add on computer which was very difficult to manage so I removed it and thought I would try to manage the air flow instead. Do you know of an ECM available that would replace the stock one? Most shops that claim they can supply one are very expensive with no assurances of success.

Thanks for responding.

Jim

[JP]

The project continued and next step was to assemble suspension and brakes.
Our Viper doesn't have a regular 4-link, it wasn't room enough to make a 4-link the way Phil wanted it, so he decided to build a 3-link.


With a 3-link there are a few things that need to be 100% if you want it to behave perfect on the strip, one of them is the Anti-Roll Bar. When we received the chassi we decided to build a new Anti-Roll Bar. One that is far more rigid compared to the first one we had.
First a CAD Drawing

The final product, more of a Aussi Pro Mod style.


After that the focus went to the front end stuff. The stock hub/spindles (6-lug) was replaced with Dodge Dakota spindles and the Brakes came from Lamb. The Front Coil Overs are American Eagle (what I had on the shelf), They been shortened and revalved...but will probably be changed to a set of Ohlins in the future.


The Master Cylinder from Lamb on the narrow footwell.


After everything was in place we found out we had a severe Bump Steer problem. We tried different solutions but ended up with moving the Steering Rack and fabrication of longer steer rods, so now it's acceptable. Any way the car isn't built for huge wheel stands.

[JP]

Looks like I'm not allowed to upload more pics, so the build story stops here.
Btw, 2nd test pass we did 9.39/147...
:-)

[cutta]

Originally Posted by JP

Looks like I'm not allowed to upload more pics, so the build story stops here.
Btw, 2nd test pass we did 9.39/147...
:-)

JP, congrats on making it this far with the combo, I've been trying to keep an eye on it when I can on facebook. Given the power you are currently making with the engine, what do you think your low ET will be once you get that power to the ground. Also, is the engine make better than competitive power and do you believe their is more untapped potential in the combo?