Hey, Guys,

I want more performance from my C5, and I eventually want to put turbos on the car.

With this in mind, I have heard that converting the car to a 383 (or perhaps 407cui) Stroker will not only give me greater performance due to increased displacement, but will also make my engine stronger (and hence able to sustain greater boost) due to the forged components of the kit.

The kit I'm looking to buy is the Lunati Stroker kit, but I have some questions:

1) Has anyone any experience of this kit? Is it as good quality as the adverts say it is?

2) Is it a straight installation, or does the block need modifying at all?

3) What sort of power should I see on an otherwise stock MN6 1999 C5 with the 383 Stroker?

4) What sort of power difference would I see if I went for the 407cui stoker?

5) Is there anything else I should take the opportunity to do whilst the engine is in pieces?

6) Does the engine require running in after installation?

7) How long would installation take?

8) Does the ECU need to be retuned after the installation.

Lots of questions, can anyone help?

Thanks!

 

The Lunati kit is very good and a 4" stroke hence 382ci--you would get noticeable torque increase and some power but would need to back it up with cam and heads as well as long tube headers to get real power from it--you could go to a 4.125 stroke and get about 395ci but I would stay with a 4" stroke if I did it again and to get more cubes from there you will have to sleave the block---all this is very expensive--my 436ci with all the goodies was a good 25K---short block 10K- heads 4K-1 7/8" headers and 3" exhaust about 2300, fast 90mm intake manifold and TB 1500, cloyes timing chain 400, exedy dual disk clutch to handle it 1500--hd 390 rearend 1500 then there is labor, bolts hoses gaskets etc and so much more before the car can handle it---If I were you I would get a good heads cam package for about 4K or so, 1K for long tube headers, single disk exedy clutch 1000, you can get an easy 450rwhp out of them--you may have 300rwhp now so a 50% increase in power and there is no street tire made of any size that will handle that very well much less any more--

 

1) The lunati kits are good quality kits. There pistons aren't the best for a boosted application, though.
2) Your block will need to be machined, i.e. honed, align honed and possibly decked. Also the kit will need to be balanced, unless you buy it already balanced.
3) With the 383 mildly done you should see between 420-480rwhp
4) With the 408 we have seen over 500 at the tires naturally aspirated.
5) As much as possible
6)Yes there will be some break in miles needed, about 500 miles
7)Installing a engine in a vette should take about 1-2 days
8) You will require tuning with the bigger engines

If you have anymore questions please feel free to ask.

Thanks