890 rwhp with Factory Catalyst!

Dan Cragin

Legacy/Supporting Vendor
Supporting Vendor
Joined
Feb 16, 2007
Posts
1,239
Reaction score
3
Location
LA, CA
In the past it has been really difficult to make good power and pass emissions in California. We wanted to come up with a package that would pass the strict visual and tailpipe emissions and make super car power. We used our EED forced induction ready engine package and Paxton smog legal supercharger package meet this criteria.

You must be registered for see images attach



We used a 2002 ACR for our first test. The 2002 models have the most stringent emission standards for the Gen 2 cars. We had to use a short overlap blower camshaft, to pass the miss-fire monitor, an exhaust and O2 sensors that would allow for quick 02 and catalyst warm-up and an effective sealed crankcase ventilation system.


You must be registered for see images attach



The results were impressive. With 11-psi boost we achieved 890rwhp. The car passes California tailpipe emissions, has a lumpy idle and makes very linear power. Some other upgrades that really improved this build are our fresh air intake system and dual pusher fan upgrade.



You must be registered for see images attach


Thanks to Greg Stocket for allowing us to do this build. We are excited about seeing it run at Mopar’s at the strip next week!

If there is an interest in this thread we can post the dyno sheets boost logs and emission results, plus details on the build, just let us know.
 

Camfab

Enthusiast
Joined
Oct 2, 2004
Posts
2,915
Reaction score
3
Location
SoCal
Really impressive Dan. Great tuning job, and clearly a case that shows how effective the factory cats actually are.
 

99 R/T 10

Enthusiast
Joined
Jun 4, 2001
Posts
10,314
Reaction score
0
Location
Enterprise, AL USA
Come on Dan, of course there is interest! :D :D

Post up the dyno sheet! Also, what kind/size injectors are you using? It looks like you're using the stock fuel system from the manifold.
 
Last edited:

Burt G

Enthusiast
Joined
Oct 11, 2001
Posts
309
Reaction score
1
Location
Nor. Ca.
WHOA...890RWHP & Still meet CA emissions, Please provide info on aproximate costs for this type of
SC install for a GenII. Or feel free to PM. Thanks !!
 

Lawrenzo

Enthusiast
Joined
Feb 9, 2001
Posts
1,749
Reaction score
2
Location
Colorado Springs
Would just any smog shop be able to pass these cars? Or would we have to travel to specifically trained ones?
 

2MANYTOYS

Enthusiast
Joined
Oct 30, 2002
Posts
1,656
Reaction score
0
Location
North Carolina
How long do you think the CATS will last with the increase of heat from the blower? Very nice build. I'm sure this is a god send for the CA owners.:2tu:
 

Dan Cragin

Legacy/Supporting Vendor
Supporting Vendor
Joined
Feb 16, 2007
Posts
1,239
Reaction score
3
Location
LA, CA
Thanks for the interest in this build and your questions. We started with our forced induction engine build. This consists of a forged bottom end, better rods, bearings, pistons, balancer, timing chain, blower cam, low bleed lifters, oil pump modifications, head studs and JM head work. This is a pretty good foundation for up to 900rwhp. The fuel system is upgraded with a modified tank module, external pumps, regulator and bigger fuel injectors. The exhaust is an E.O header with heat shields, factory cats and Corsa Cat back. The SC System is the off the shelf Paxton E.O legal kit with a pulley change. In order to reduce intake temperatures we added our fresh air intake system and pusher fans. Here are some power results.


You must be registered for see images attach



The production catalysts are pretty stout, even when you double the hp of the engine. The key is to keep the air fuel ratio right so you do not overheat them. If used on the track for continues wide open throttle sessions their service life would diminish. For a track (off road) application I would delete them. Here is a the air fuel and boost information for this build:

You must be registered for see images attach
 

Dan Cragin

Legacy/Supporting Vendor
Supporting Vendor
Joined
Feb 16, 2007
Posts
1,239
Reaction score
3
Location
LA, CA
The heads are production with the JM stage 3 porting. I think that the big power adder in this build was the JM blower cam and the tuning our technician Chris Jensen has developed.

I will post up some pictures of the fresh air intake and pusher fan system.
 

Bobpantax

Enthusiast
Joined
Oct 2, 2000
Posts
6,957
Reaction score
0
Location
Miami
Hi Dan. Is that 890 rwhp as measured on the new dyno you described a few weeks ago that reads a bit higher than the Dynatech dynamometer most of us have had are cars tested on? If so, what would the number have been on your old dyno? Thanks in advance for your response.
 

Dan Cragin

Legacy/Supporting Vendor
Supporting Vendor
Joined
Feb 16, 2007
Posts
1,239
Reaction score
3
Location
LA, CA
Bob,
We have two types of dyno's in the Shop, a Dynojet and a Dynopack. We used the Dynopack on this car which reads about 5% higher than the Dynojet. This car on the Dynajet most likely we put out about 850rwhp.
 

Bobpantax

Enthusiast
Joined
Oct 2, 2000
Posts
6,957
Reaction score
0
Location
Miami
Bob,
We have two types of dyno's in the Shop, a Dynojet and a Dynopack. We used the Dynopack on this car which reads about 5% higher than the Dynojet. This car on the Dynajet most likely we put out about 850rwhp.

Thank you. Impressive.
 

Members online

No members online now.

Forum statistics

Threads
151,870
Posts
1,672,959
Members
16,026
Latest member
joelvella18
Top