Unique 1992 6-Speed Polo Green Convertible, 650HP
03-18-2014, 12:44 PM
#1
Sold Unique 1992 6-Speed Polo Green Convertible, 650HP
SOLD
Time to sell this very unique car. I have owned it since July 2004 and I am very sorry to see it go.
Price Revised March 31 - $15,500 or sensible offers.
CARFAX HERE: (Expires May 5, 2014)
http://www.carfax.com/viewEmailRepor...3D&language=en
61,000 miles on the Chassis, only 3,000 miles on the engine and supercharger.
This is a 6-speed convertible with a fully built and internally balanced, forged LTx 383 motor built by Grimes Machine of Alpharetta Georgia. Garry Grimes is a very respected builder and has many good references (right now I have 3 of his chevy engines in various cars). The engine is built for around 9:1 compression.
The heads and intake are fully CNC'ed LT4 parts. Cam is 236/242 .579/.584 lift on a 114 LSA. The engine has 1.6 Roller rockers.
The supercharger is a very large Vortech V7-YSi capable of 1100 BHP. It currently has a pretty large pulley installed that sizes the boost to around 16 psi at 6400RPM. The entire supercharger setup was built in conjunction with Greg Carroll at Blowerworks, and to the best of my knowledge is one of only two like it. There are YSi blowers running on L98's and Camaro's, but quite challenging to get them to fit under the stock hood of a C4 LTx Corvette. We got a very slick install and it gets a huge amount of attention at shows.
Fuel-wise, it currently has 60pound injectors and dual inline fuel pumps (the big one is an aeromotive), using a racetronix custom harness to supply 14 volts to the pumps.. and I have tested on the car at 88 gallons per hour.
On the dyno with a conservative tune (around 11.8:1 AFR) the car puts 580 to the wheels at 6000RPM, at which point the injector duty cycle is at 85%. This is how the car sits today. If the new owner wishes, it would be very simple to reduce the size of the supercharger pulley, replace the injectors with 80pounders and with some tweaking of fuel pump voltage or maybe twin in-tank pumps easily make 700 at the wheels with a new tune. (Note that the tune is a '2 Bar' tune - very easy to tweak at the dyno). Stock 1992 ECM.
There are many, many other features of this car:
1. Alcohol Injection / Charger cooling.. 2 stage boost referenced
2. Boost and fuel pressure gauges
3. Permanent wide band set up
4. Custom Exhaust
5. Roll Bar
6. ZF Doc shifter
7. Spec stage 3+ clutch
8. Huge Brembo front brakes
9. QA1 Coilovers
10. All aluminum radiator
The car has fully functioning A/C (although probably needs a charge this summer, I last charged it in 2009). It will sit all day in Atlanta traffic without any overheating, gets close to 20mpg on the freeway. It is also very street friendly - the combination of low compression and centrifugal boost means that it is very easy to drive in traffic at lower RPM's. Above 3500 RPM's and full throttle .. watch out. :-)
The car is ready to jump in and drive - no issue with flying into Atlanta and taking a road trip home.
There's so much more to this car, I'll add more to this thread as questions come in. I'll post pictures next.
Note that I travel extensively on business, there may be an occasional delay to questions on this thread.
Time to sell this very unique car. I have owned it since July 2004 and I am very sorry to see it go.
Price Revised March 31 - $15,500 or sensible offers.
CARFAX HERE: (Expires May 5, 2014)
http://www.carfax.com/viewEmailRepor...3D&language=en
61,000 miles on the Chassis, only 3,000 miles on the engine and supercharger.
This is a 6-speed convertible with a fully built and internally balanced, forged LTx 383 motor built by Grimes Machine of Alpharetta Georgia. Garry Grimes is a very respected builder and has many good references (right now I have 3 of his chevy engines in various cars). The engine is built for around 9:1 compression.
The heads and intake are fully CNC'ed LT4 parts. Cam is 236/242 .579/.584 lift on a 114 LSA. The engine has 1.6 Roller rockers.
The supercharger is a very large Vortech V7-YSi capable of 1100 BHP. It currently has a pretty large pulley installed that sizes the boost to around 16 psi at 6400RPM. The entire supercharger setup was built in conjunction with Greg Carroll at Blowerworks, and to the best of my knowledge is one of only two like it. There are YSi blowers running on L98's and Camaro's, but quite challenging to get them to fit under the stock hood of a C4 LTx Corvette. We got a very slick install and it gets a huge amount of attention at shows.
Fuel-wise, it currently has 60pound injectors and dual inline fuel pumps (the big one is an aeromotive), using a racetronix custom harness to supply 14 volts to the pumps.. and I have tested on the car at 88 gallons per hour.
On the dyno with a conservative tune (around 11.8:1 AFR) the car puts 580 to the wheels at 6000RPM, at which point the injector duty cycle is at 85%. This is how the car sits today. If the new owner wishes, it would be very simple to reduce the size of the supercharger pulley, replace the injectors with 80pounders and with some tweaking of fuel pump voltage or maybe twin in-tank pumps easily make 700 at the wheels with a new tune. (Note that the tune is a '2 Bar' tune - very easy to tweak at the dyno). Stock 1992 ECM.
There are many, many other features of this car:
1. Alcohol Injection / Charger cooling.. 2 stage boost referenced
2. Boost and fuel pressure gauges
3. Permanent wide band set up
4. Custom Exhaust
5. Roll Bar
6. ZF Doc shifter
7. Spec stage 3+ clutch
8. Huge Brembo front brakes
9. QA1 Coilovers
10. All aluminum radiator
The car has fully functioning A/C (although probably needs a charge this summer, I last charged it in 2009). It will sit all day in Atlanta traffic without any overheating, gets close to 20mpg on the freeway. It is also very street friendly - the combination of low compression and centrifugal boost means that it is very easy to drive in traffic at lower RPM's. Above 3500 RPM's and full throttle .. watch out. :-)
The car is ready to jump in and drive - no issue with flying into Atlanta and taking a road trip home.
There's so much more to this car, I'll add more to this thread as questions come in. I'll post pictures next.
Note that I travel extensively on business, there may be an occasional delay to questions on this thread.
Last edited by djxib; 04-28-2014 at 08:54 PM.
03-18-2014, 12:56 PM
#2
Here's a good introduction to the car - this video was taken in Aug 2012 after I put the new exhaust system on the car. Since this video was taken there have been a few upgrades to the fuel system including an aeromotive adjustable fuel pressure regulator (it runs at stock fuel pressure), and the large aero pump.
https://www.youtube.com/watch?v=Zy49...ature=youtu.be
https://www.youtube.com/watch?v=Zy49...ature=youtu.be
03-18-2014, 12:59 PM
#3
..and here's the initial Dyno run.. there have been about 12-15 dyno runs since this video was taken.
https://www.youtube.com/watch?v=WC7J...ature=youtu.be
https://www.youtube.com/watch?v=WC7J...ature=youtu.be
03-19-2014, 03:17 PM
#6
Team Owner
Hate to see you let the car go. Been a while since the Hooters Posse meets. I'm sure the car still looks awesome 
Last edited by 93Polo; 03-20-2014 at 09:22 AM.
03-20-2014, 08:03 AM
#7
When I bought it in 2004, the previous owner said it had hardened drive shafts. However I have not been able to validate that. Otherwise it's stock 'black tag' transmission and stock gear ratios. I have drag raced it a few times but my 60 foot times are usually over 2.0 seconds so I have not been hard on the drivetrain.
03-20-2014, 08:04 AM
#8
03-28-2014, 01:51 PM
#12
Friday bump. Recent maintenance items (aside from regular oil changes etc) include new tie rod ends and A-arm ball joints. Currently has almost new Nitto NT-05's on the front and 2-year old NT-01's on the back.. the NT-01's have about 1500 miles on them.
03-28-2014, 06:00 PM
#13
Drifting
Would love to have this car!
04-05-2014, 09:57 AM
#17
Carfax added to this post. As you can see it is totally clean.
http://www.carfax.com/viewEmailRepor...3D&language=en
http://www.carfax.com/viewEmailRepor...3D&language=en
04-08-2014, 10:06 PM
#18
Advanced
I talked with Andy about the Vette, and while I decided to go a different route instead, he was very helpful. I offered to post the pictures of the car he sent to me here in the thread to help with his sale.
Here is a link to a slideshow of the photos:
http://s243.photobucket.com/user/Eri...992%20Corvette
Here is a link to a slideshow of the photos:
http://s243.photobucket.com/user/Eri...992%20Corvette
04-10-2014, 09:26 AM
#19
I talked with Andy about the Vette, and while I decided to go a different route instead, he was very helpful. I offered to post the pictures of the car he sent to me here in the thread to help with his sale.
Here is a link to a slideshow of the photos:
http://s243.photobucket.com/user/Eri...992%20Corvette
Here is a link to a slideshow of the photos:
http://s243.photobucket.com/user/Eri...992%20Corvette
