sprinter

Hi guys,

Just starting some initial research on 440ci long / short blocks. Short block option would use locally (Aussie) ported LS7 heads. As far as I can see, there are a few off-the-shelf options:

LME 440
Texas Speed 440
SDPC 440

I am wanting to put this in a M6 C5 Corvette for 70% track / 20% street use. Need info on high compression N/A setups that are not too sick in traffic. This would be using a custom twin-plenum ITB manifold. What are realistic rwhp goals and street manners? Fuel economy, max RPM etc?

Any comments from members with the above supplier engines?

knyght4

0Ron@Vengeance Racing

We have built quite a few 440 LS7 combinations. We typically run TrickFlow 235cc cathedral port cylinder heads matched to a ported FAST intake manifold. As far as numbers are concerned we tend to make approximately 600rwhp and 550rwtq. This is with a mid 250s duration camshaft and 11.1:1 compression. There are atleast three members on this forum that run our 440 LS7 and absolutely love it!!!

Feel free to give me a call or shoot me a PM if you have any questions or would like to discuss an engine for your specific goals.

sprinter

Thanks Ron.

In the early stages of research and am just putting together a parts list. Also adding the cost of all the "extras" e.g. drivetrain, fuel system, cooling etc.

QUICKSLVR

I just had one built by Mast Motorsports. Mild cam , 11.2 :1 compression , Mast LS7 cnc'd heads that flow 390cfm! Its not in the car yet, but it made 665/ 560 on their Superflow Engine Dyno . Thats with a small cam and stock , unported LS7 intake mainifold. They can make BIG power. They are competitive in price and offer a 18 month warranty. Best of luck with your build !!

SDPC

With a good set of LS7 heads 590-600rwhp is very obtainable realistically.

MPM IV

I'm one of the three and I do love my motor. I'm just over two years without a single issue. The car drives great. It's been on long trips and many top end runs. I would strongly recommend Vengeance, and not just for the performance. Their customer service was top notch and they continue to awnser any questions I have quickly.

WKMCD

Contact Shawn at VA Speed. All the machine work is done in-house. Shawn is building my Darton sleeved LS2 block 427 now.

http://forums.corvetteforum.com/c5-t...ct-begins.html

0Ron@Vengeance Racing

Any luck on that nitrous install my friend?? Glad to hear the combo is still doing well for you!!! Thanx for the kind words.

MPM IV

I'll be sending the car back your way for the install shortly. There are a couple of other things I'm hoping to do at the same time, but the car is running great. I'll e-mail soon so we can make a plan on getting everything done.
On a side note, the wife bought me a HSW Microedge+ controller for Christmas! Totaly unexpected. She complains a bit, but she's a keeper.

robz

I made around 700rwhp with a 388ci motor in my c5Z(m6). Street manners are tremendous with an ITB mani. We idle around 550rpms and there is no bucking stalling issues. I'll find out fuel economy when I get the exhausrt on and drive around.

EDS ZO6

Sprinter - I am also one of the Vengence Racing LS7 440ci owners. I made 603 RWHP and 563 RWTQ; my engine has been in for a little over one year with no issues at all. I use the car as more of a weekend warrior car than a daily driver. As far as performance and customer service I have used 3 different tuners in the last 5 years for performance modifications and The Vengence team goes above and beyond any others that I have dealt with. I highly recommend them for any work you are thinking of doing. If you have any specific questions; feel free to contact me.

robz

70% track= road race or drag race?