Hi everybody,

I am new to this forum. I am Dutch and currently living in Germany.
At the moment I drive a 92 C4 Convertible, but I am in the process of buying a new C5 Convertible. My dealer is also a Corvette-Tuner and he offers a tuning-package, including:
6.3 Liters of displacement instead of 5,7
B&B Exhaust (the only legal one in Germany)
Cold-Airbox and special air-filter
Changed Enginemanagement
Oilcooler
Changed Cylinderheads
Sportcamshaft
and some ohter changes.
He claims the car will gain some 130 HP.
Does anyone of you have any experience with such tuning, can the engine handle this on a longer timeframe, and so on.

Greetings
Erik

 

The car can handle all that without problems for the most part. The main question is how much is he charging you? In euros, DM or $ ? Sounds like he wants to rip out the enitre engine and have a whirl. You may not need to go that far because you are looking at a LARGE cost. Going from 5.7 to 6.3 is a big cost. There are many firms in the US that I am sure can sell you complete packages. Maybe if you can get a deatailed list of what he wants to do (all the parts, costs , etc) others on this forum can help you from getting something you really don't need or getting ripped off.

cheer and welcome to board! :cheers: :cool: :flag

 

He charges 22.000 Euros (including 16 % Sales-Tax :smash: )

Here is a detailed list of the items he has in his package:

- 6,3 Litre displacement
- B&B Exhaust
- Cold-Air-Box
- High-flow Arfilterbox
- 75 mm High-Flow Throttle Body
- 77 mm Airflow Sensor
-Changes to cylinderhaead: bigger RVS Valves, high quality Valvesprings,
changes to the in- and outlets
- highperformance camshaft
- highperformance pushrods
- RVS headers
- Changed Motormanagement
- Aluminium Flywheel
- highperformance Oilcooler

Teh company is called Geiger Performance and is a well known Corvette Tuner in Germany.

 

20,000 US is not to bad if that is the total cost or parts labor, the whole ball of wax. Does he offer a warranty? You may want to reaseach some of the forum vendors here. You might be able to save some cash. The top tuners in my opinion are MTI, ARE and MMS. But that is only one mans' opinion. You should research them, along with any others.

That is some serious power you are asking for so I would be thorough. You also may want to ask the questions on how Geiger is increasing the displacment; is he using a Lunati stroker kit with forged pistons, forged rods and stroked crankshaft? If not is he resleeving the engine block and reusing the stock internals? What heads does he plan to use? Are they fully ported with proper valves, what do they flow (both intake and exhaust) @ .500 and what is their volumetric efficiency? A high performace camshaft can mean anything. Is it going to be solid roller (not likely) or a higher lift, more duration bumpstick? If emmsions apply to you there, will it pass? What will the idle be and effect on fuel economy? Get the camshaft full specs and who makes it. high performance pusrods means anything also, you should ask if he is milling the heads to increase compression and thus using shorter pushrods. Cold air box I like best for form and function is the Halltech TRIC. High flow throlttle body and air sensor can mean many things. you may want to look at the LS6 85 MAF. Do not use the BBK throttle body. Ask him who will be retuning your PCM.
I would just want to ask a ton of questions and get an exact part list and procedures that is involved so you can see exactly what you are getting for your hard earned money. I would bet that he is using a Lunati stroker kit to increase the displacment, but a big question to ask. :cheers: :flag