Dynoed the Spirit R/T
Thread Starter
4SFED4
Joined: Aug 2000
Posts: 201
Likes: 0
Dynoed the Spirit R/T
After putting my new R/T back together (re-ringed the pistons, new rod bearings, valve job, etc, etc), and with about 350 miles on the engine, I decided to take it over to John's and see what she'd lay down. I was pretty curious as to whether or not everything went back together 100% and that I was making the proper amount of power. The car felt good, but the butt dyno sometimes lies.
The car was all stock except for a 3" turbo back exhaust (no cat and Race Magnum muffler), a grainger valve for boost control, an adjustable fuel pressure regulator, boost and EGT gauges, some light cleaning up of the ports and exhaust manifold, and a Pep Boys cone intake filter. In my usual fashion of keeping expenses low, I tried to do everything as reasonably as possible. Ive got $1500 in the car, plus about $400 in rebuild parts for a grand total of about $1900.
Yes, I am a typical Turbo Dodge cheapskate. But, the car is ultra clean and looks damn good for a grandma-mobile.
I wanted to keep the boost low to start just to make sure things were OK.
The first run was at 10 psi boost. (Stock boost is 11 psi.)
I added about 2 psi boost and ran it again at 12 psi.
Eventually, I got greedy (as usual) and tried to dial in more boost. Well, the vent orifice on the grainger valve was too big (and I didnt have any smaller ones with me), so I couldnt dial in the boost I wanted...all I could get was a wacko boost spike (18-19 psi)and a quick drop right back to 12-13 psi boost
The spike started to show up in the lower boost runs, but it was much smaller, on the order of 2 psi, i.e. on the 10 psi run, the spike was to about 12 psi.) You can see the boost spike and boost drop pretty clearly in the plot below.
Ah well....all and all I was pleased. Im pretty sure I can crack 300 whp on the stock turbo and IC with a bit more tuning.
The car was all stock except for a 3" turbo back exhaust (no cat and Race Magnum muffler), a grainger valve for boost control, an adjustable fuel pressure regulator, boost and EGT gauges, some light cleaning up of the ports and exhaust manifold, and a Pep Boys cone intake filter. In my usual fashion of keeping expenses low, I tried to do everything as reasonably as possible. Ive got $1500 in the car, plus about $400 in rebuild parts for a grand total of about $1900.
Yes, I am a typical Turbo Dodge cheapskate. But, the car is ultra clean and looks damn good for a grandma-mobile.
I wanted to keep the boost low to start just to make sure things were OK.
The first run was at 10 psi boost. (Stock boost is 11 psi.)
I added about 2 psi boost and ran it again at 12 psi.
Eventually, I got greedy (as usual) and tried to dial in more boost. Well, the vent orifice on the grainger valve was too big (and I didnt have any smaller ones with me), so I couldnt dial in the boost I wanted...all I could get was a wacko boost spike (18-19 psi)and a quick drop right back to 12-13 psi boost
The spike started to show up in the lower boost runs, but it was much smaller, on the order of 2 psi, i.e. on the 10 psi run, the spike was to about 12 psi.) You can see the boost spike and boost drop pretty clearly in the plot below.Ah well....all and all I was pleased. Im pretty sure I can crack 300 whp on the stock turbo and IC with a bit more tuning.
__________________
Larry
2002 MB C320 Sport Wagon 15.4@91
2002 Dodge Neon SE
1991 Dodge Spirit R/T-12.3@117 (at 368 whp) Now 500 whp / 514 ft lb on pump gas
Larry
2002 MB C320 Sport Wagon 15.4@91
2002 Dodge Neon SE
1991 Dodge Spirit R/T-12.3@117 (at 368 whp) Now 500 whp / 514 ft lb on pump gas
Rod Bearing Eater
Joined: Apr 2002
Posts: 27
Likes: 0
Jeff better make a good name for the room too 
Spirit vs Spirit
BTW that RT is beyond clean, was that Warren's old RT?
Spirit vs Spirit
BTW that RT is beyond clean, was that Warren's old RT?
__________________
Patrick
05 SRT-4: Daily Driver, 11.9@117.4
88 Aries: 2.2L Turbo (Powered by Megasquirt II)
Patrick
05 SRT-4: Daily Driver, 11.9@117.4
88 Aries: 2.2L Turbo (Powered by Megasquirt II)
Thread Starter
4SFED4
Joined: Aug 2000
Posts: 201
Likes: 0
Originally posted by "mpbiv"
BTW that RT is beyond clean, was that Warren's old RT?
BTW that RT is beyond clean, was that Warren's old RT?
__________________
Larry
2002 MB C320 Sport Wagon 15.4@91
2002 Dodge Neon SE
1991 Dodge Spirit R/T-12.3@117 (at 368 whp) Now 500 whp / 514 ft lb on pump gas
Larry
2002 MB C320 Sport Wagon 15.4@91
2002 Dodge Neon SE
1991 Dodge Spirit R/T-12.3@117 (at 368 whp) Now 500 whp / 514 ft lb on pump gas
....I was the one at the shop in the busted ass Audi TT....
red ass
Joined: Jul 2000
Posts: 837
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very nice mr larry!!! i am still in search of the perfect turbo dodge!!
__________________
eric.
Build your car for YOU, not for the fame and glory. Fame and glory fade with time but YOU will be around as long as you live.
eric.
Build your car for YOU, not for the fame and glory. Fame and glory fade with time but YOU will be around as long as you live.
Guest
Posts: n/a
yeah yeah.. ive seen those pics way too much larry!!
i still have to leave the computer and cry when i see it!
My spirit is on a good diet... the rust isnt getting better on it, so i'm starting to cut while the days count down. The drivetrain and suspension will find its way into my CSX eventually, but will be with a 5-spd. Then in the future it looks like it will grown an extra cam! :o
i still have to leave the computer and cry when i see it!
My spirit is on a good diet... the rust isnt getting better on it, so i'm starting to cut while the days count down. The drivetrain and suspension will find its way into my CSX eventually, but will be with a 5-spd. Then in the future it looks like it will grown an extra cam! :o
Guest
Joined: Sep 2001
Posts: 997
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Originally posted by "FearThe4Doors"
Like they'll think any different of us!
Originally Posted by CrazyMoparGirl
Congrats, You better be at Track day and make a good name for the room 
Like they'll think any different of us!
