1995 deville

[Deville_Dustin]

Hey guys i have a 1995 Deville with the 4.9 engine. I was wondering whats out there for performance parts or mods, ive searched google for a while and found nothing. There's also only 60,000 on the engine. Thanks for all the help.

Dustin

[Bruce Nunnally]

http://www.fastchip.com/ offers a custom chip for the 4.9L. After that is custom exhaust.

[Deville_Dustin]

http://www.fastchip.com/ offers a custom chip for the 4.9L. After that is custom exhaust.

Hey thanks for the link, does the chip actually improve performance or just remove the top speed limiter?

any recommendations for exhaust?

[Bruce Nunnally]

I had the fastchip on my 92 STS with the 4.9L and my impression was that it did both, but I did not get good before/after measurements.

I put an edelbrock muffler on the 92 STS; it had a single transverse muffler; I think what you will want to do is look for a high-flow replacement for the muffler. To shop, examine the configuration and measure the inlets/outlet diameters to within a 1/4"; for example, 2 & 1/4" in, 2 & 1/4" out. Also not if the inlet is center or offset, outlet is center or offset. With that info you can shop online for a 'universal' replacement to get an idea on pricing.

Then chat with a local muffler shop and see what brands they prefer. Try to stay with a high-flow stainless steel solution if within your budget, so that the muffler won't rust.

[Deville_Dustin]

Yeah thanks for all the help, I know what im doing with cars im in college for auto, i was just wondering performance and as in cams ect. i just wanna get it to the power range as a northstar engine. im not worried about finding a muffler but i would love to find some headers? I have a all wheel drive talon so its not like i wanna make it super fast. just more get up and go :)i do have some money to play around with. any idea's?

[Bruce Nunnally]

There was some work that was done with a 5L variant, by a shop called ASG in Indy. You can get a feel for where they were headed on my older info page here:

http://www.angelfire.com/stars/mycaddy/asg.htm

They measured their engine at 290 hp on an engine dyno, and it would be a direct fit replacement / upgrade.

ASG 5.0 Engine Technical Specifications

The ASG 5.0 System was designed to update the GM W class cars to modern, fuel injected V8 power. It can also be used as a direct, drop-in replacement for the Cadillac 4.9L engine and 4T60-E transmission in cars so equipped.

ASG 5.0 engines begin life as a new GM Goodwrench Cadillac OHV 4.9L V8. This engine was the mainstay for Cadillac from 1991-1994 when it was replaced by the 4.6L DOHC Northstar Engine. The 4.9L OHV V8 is rated at 200 HP at 4100 RPM, and 275 ft-lbs of Torque at 3000 RPM by Cadillac. Cadillac mated the 4.9L OHV V8 with their strongest front-wheel drive automatic transmission of the day -- the Cadillac 4T60-E.

ASG 5.0 Engine Modifications:

* The engine is balanced and blueprinted. This is a process wherein every important tolerance in the engine is optimized to produce maximum power.

* The heads are decked, which helps raise the compression from 9.5:1 to 10.5:1

* Heads are ported and polished

* New, higher performance pistons are used

* New, higher performance fuel injectors are used

* Hardened crank shaft and rods are used

* Cooper retainer ring is embedded into the head to improve head gasket retention under higher compression

* Replacement air box for improved air flow

ASG 5.0 Transmission Modifications:

* A new 4T60-E transmission is used, with valve body and pump modifications to handle the additional power