BMC Challenger R/T - New Engine Build ... a First in Many Ways!

Due to the recent ring land failure of my stock cylinder 1 piston, we need to replace the motor in order to keep on racing and testing products for you guys. I want to continue to run the Techco supercharger, but want to be able to turn up the boost so forged internals are a must, of course.

Our new set-up will be the first in a couple of ways, as it's the first 395 stroker Techco is building, and we will also have the first ported Techco supercharger! Here are all the specs ...

397 cubic inch (6.5L) by Techco ... first one!!

Bore: 3.937
Stroke: 4.080
Compression Ratio: 8.5:1

Pistons: Techco reverse dome, tool steel pins
Rod: H-beam forged by K1
Crankshaft: Forged by K1
Heads: Techco CNC Ported, beehive valve springs


Ported Techco Supercharger ... first one!!
Boost:
Belt: Gilmer (cog)


A very special thank you to Carlos and Billy at Techco for making this new engine and supercharger possible, and for choosing us to run their first 395 and first ported supercharger. For those who aren't familiar with the extensive background of the Techco crew, they were responsible for all the Saleen engines over the past 10+ years, including the Saleen Mustangs, Parnelli Jones Mustang and the Saleen S7 super car to name a few. With a complete state-of-the-art machine shop, all the machine work and assembly of their engines will be done in-house.

We are going to be doing some cool things once this car is done, so stay tuned to this thread and our forum for all the updates along the way including transmission, rear end and fuel upgrades which are in the works!

Lisa.

 

Look out 10's here we come!

 

wow!!! congrats lisa and i look forward to seeing the progress. i assume the long block is being sent to you to install yourself??? are they porting your existing s/c or is the ported s/c a new design??? very cool stuff brewing here!!

 

We are sending out Lisa's 5.7 to Techco, they will be re-using the block for the build, and returning the Longblock to us here to do the install. The runners on the S/C will be ported to match the new ported heads.

 

very cool!! thanks kris!

 

Lisa,
What did your heads look like after you broke the land? I just broke some on my 6.1 with my STS turbo. We haven't taken off the heads yet but I'm hoping beyond hope they are reusable.

 

Sorry to hear about your engine. Let me know if we can help you with the re-build in any way.

 

Thanks for the pics. Good luck with the new motor!

 

Great news Lisa. I'm looking forward to all the updates.

Ken

 

Wow...by the sounds of that, the car will be a monster. :thumb:


Good Luck.

 

I updated the specs in my first post as we are going to run 8.5:1 compression in order to pull a few tricks out of the bag. More to follow!!

 

We are working with Techco on the new engine specs as they will be creating official names tomorrow for their stroker motors and the ported supercharger ... so I have another update on mine. The cubic inch is going to be 397 and that equates to 6.5L and the bore is 3.937.

BTW, for anyone wanting a 6.1 based stroker from Techco, we will have those available also, and it will be a 427 cu in.

It keeps getting better and better!!

 

My engine and supercharger is ready to be picked up by Techco and head in for the overhaul. Now, the build will begin!

 

My engine and supercharger have arrived at Techco! Let the building begin!! I'll post updates and pics as I have them.

 

I got some pics of my new rotating assembly from Techco and these components look sweet!! Crank and rods by K1 and the pistons are by CP ... all to Techco's unique specs. Check out the reverse dome pistons, which are dished to match the design of the combustion chamber with the heads. I'm loving those especially, and the nice dish will make the low compression ideal for running high boost. Here are some pics!!













Techco has torn down my blown engine and will be building the new one now that the parts have arrived. I can't wait!!

 

:drool:

 

Here are some more pics of the new piston compared to the factory piston.





These new pistons are sweeeeeeeeeet.

 

8.5 : 1...... wow, that is low. i understand for running up the boost. obviously this car will never be without a blower of some sort. why so low on the ratio??? just curious....

 

We went with the compression per Lisa's request, I dont think she plans on taking the unit off but I will let her answer.

 

I too am repalcing a blown motor. Looks like one of the valve springs on my Indy heads broke. Block and heads were destroyed. Oh well, just a reason to build it back bigger and better.