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Darren Tedder's 400 lo deck build- Mopar Muscle Contest #1095195
10/15/11 11:18 PM
10/15/11 11:18 PM
Joined: Jul 2005
Posts: 336
Creston, Iowa
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340man4ever Offline OP
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340man4ever  Offline OP
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Creston, Iowa
Haven't seen the magazine yet- anyone know the specifics? Heads / Compression / Etc


Sounds like a heck of an engine


Curator at Adams County Speed Shop
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: 340man4ever] #1095196
10/17/11 12:09 PM
10/17/11 12:09 PM
Joined: Oct 2011
Posts: 559
Idaho
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LaRoy Engines Offline
mopar
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Didn't have a whole lot of time to talk to him as we were putting our engine back together after the incident the day before.

He was using Stealth heads, 13:1 compression because I specifically asked him about that. 300# valve spring pressure on the seat as they were winding the 406 to 8500 rpm. Indy single plane with a Holley street carburetor that still had the electric choke on it.

Sorry, just bits and pieces, 'cause during his teardown we had our engine back on the dyno again. Won't be any real magazine coverage for months yet.

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095197
10/17/11 12:26 PM
10/17/11 12:26 PM
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Posts: 9,866
Weddington, N.C.
Streetwize Offline
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The combo sounds really close to the HP engines (Hollis Page/David Klutz) NC entry.


WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: Streetwize] #1095198
10/17/11 12:43 PM
10/17/11 12:43 PM
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Posts: 559
Idaho
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LaRoy Engines Offline
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Idaho
Hollis built a great engine. I mean we're talking 1.5 HP/CI with a flat tappet camshaft. 608HP from 406ci.

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095199
10/17/11 02:26 PM
10/17/11 02:26 PM
Joined: Feb 2006
Posts: 1,048
The Great White North
RAMM Offline
super stock
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The Great White North
Good to see ya here IQ. Moparts could defintately use some of your experience and knowledge. J.Rob


2009 PHR\EMC Competitor
2010 PHR\EMC Competitor
2011 PHR\EMC Competitor
2012 PHR\EMC Competitor
2013 PHR\EMC Competitor
2014 HotRod/EMC Competitor
2015 HotRod/EMC NoShow
2016 HotRod/EMC 3rd place SPEC Bigblock
2018 HotRod/EMC 7th place G3
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095200
10/18/11 02:30 PM
10/18/11 02:30 PM
Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger Offline
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Quote:

Hollis built a great engine. I mean we're talking 1.5 HP/CI with a flat tappet camshaft. 608HP from 406ci.


Can't wait to hear more. Been thinking about a 650 hp 400 bracket build over my 383...

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: RemCharger] #1095201
10/19/11 01:51 AM
10/19/11 01:51 AM
Joined: Oct 2011
Posts: 559
Idaho
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LaRoy Engines Offline
mopar
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Idaho
Tedder managed to make 647HP with his 406, but subsequently broke a rocker shaft.

Buck Hinkle made over 595HP with his 404ci/361, but, shattered a piston and cylinder wall into a million pieces doing it. It busted up the block so badly you could look into the exhaust port and see his camshaft and lifters.

Comp Cams forgot to turn the water on to our 906 headed 500ci stroker and burnt it to a crisp during the ring break in. It got hot enough to start burning the paint on the cylinder heads. We bandaged it back together and the following day managed to scratch out 730HP with leakdowns at 23%, 30%, 32% and 56%. It was impossible to tune the carburetor with all the exhaust gasses flowing back into the intake manifold through the warped intake valves and seats.

It was definitely an event to remember. I hope the write-ups in the magazine are as exciting as the dyno runs were.

Last edited by heyoldguy; 10/19/11 02:34 AM.
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095202
10/19/11 04:51 AM
10/19/11 04:51 AM
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Posts: 3,502
SOUTH JERSEY
HEMIFRED Offline
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I saw a video and they mentioned that Darren's motor was hitting 8500 RPM. The highest by far of all


home of the
Sox and Martin Hemi Duster


Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095203
10/19/11 11:23 AM
10/19/11 11:23 AM
Joined: Feb 2006
Posts: 1,048
The Great White North
RAMM Offline
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The Great White North
Quote:

Tedder managed to make 647HP with his 406, but subsequently broke a rocker shaft.

Buck Hinkle made over 595HP with his 404ci/361, but, shattered a piston and cylinder wall into a million pieces doing it. It busted up the block so badly you could look into the exhaust port and see his camshaft and lifters.

Comp Cams forgot to turn the water on to our 906 headed 500ci stroker and burnt it to a crisp during the ring break in. It got hot enough to start burning the paint on the cylinder heads. We bandaged it back together and the following day managed to scratch out 730HP with leakdowns at 23%, 30%, 32% and 56%. It was impossible to tune the carburetor with all the exhaust gasses flowing back into the intake manifold through the warped intake valves and seats.

It was definitely an event to remember. I hope the write-ups in the magazine are as exciting as the dyno runs were.




What's REALLY impressive about the LaRoy entry is that all of that power was made with OEM head castings!! J.Rob


2009 PHR\EMC Competitor
2010 PHR\EMC Competitor
2011 PHR\EMC Competitor
2012 PHR\EMC Competitor
2013 PHR\EMC Competitor
2014 HotRod/EMC Competitor
2015 HotRod/EMC NoShow
2016 HotRod/EMC 3rd place SPEC Bigblock
2018 HotRod/EMC 7th place G3
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: RAMM] #1095204
10/19/11 11:52 AM
10/19/11 11:52 AM
Joined: Oct 2004
Posts: 3,097
back in Georgia
dthemi Offline
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back in Georgia
The contest was tons of fun, and it was good to meet everyone. Our motor had made 703 at home then lost 60 hp over 2 pulls. We had tried to wean it off oil a few times looking for power that led to 3 seperate total failures above 8,000 rpm. We broke a rocker shaft at comp after making all our pulls playing with the motor, but power kept going away. What we found was that the rocker hold down holes in the heads were failing. When we pulled it down all the bolts were finger tight, and or stripped. We were so time stressed from the 3 previous failures it just went unnoticed. Our motor left the shop for Ohio still hot from the dyno, and we never took the valve covers off till it broke at comp after the competition pulls. Our final power at home was 635 before it left, so our dyno is reading conservative. Also I didn’t realize (through stupidity) that vacuum pumps were legal. Our nearest competitor used one (smart), and we did not (stupid). We’ll put one on our motor this time. I would think ,given the ring package and rpm a pump might be worth another 15-20hp

We are redoing it with all new parts, and documenting every step for Mopar Muscle.

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: dthemi] #1095205
10/19/11 02:25 PM
10/19/11 02:25 PM
Joined: Nov 2003
Posts: 2,131
New Lenox IL
cudadon Offline
top fuel
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Darren I will anxiously await that article.

Are you going to test this engine on E-85 also?
Thanks, Don

6878825-Launch5-22-11.jpg (175 downloads)
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: cudadon] #1095206
10/19/11 07:33 PM
10/19/11 07:33 PM
Joined: Oct 2004
Posts: 3,097
back in Georgia
dthemi Offline
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No e85 testing, it doesn't have enough cylinder pressure to help much. It'll be done just as it was, save fixing the rocker hold down holes, and adding a pump afterwards. I'm glad we skinned by at the contest, but it should have been 1.75 per inch, but that's just the way it goes.

The motor had been blown up 3 times figuring it out, so the walls, pistons and ring lands were rough to say the least. The crank was down to SBC size by then too. It's a good combo, and I think not many will guess what made it up. It was catalog mopar stuff as the contest required, but it's for sure different than Ross intended. Who knows, maybe they'll add that piston to a new mopar catagory.LOL

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095207
10/20/11 12:09 PM
10/20/11 12:09 PM
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Posts: 4,003
Shelby Twp. Mi
HardcoreB Offline
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Quote:

...Comp Cams forgot to turn the water on to our 906 headed 500ci stroker and burnt it to a crisp during the ring break in. It got hot enough to start burning the paint on the cylinder heads. We bandaged it back together and the following day managed to scratch out 730HP with leakdowns at 23%, 30%, 32% and 56%. It was impossible to tune the carburetor with all the exhaust gasses flowing back into the intake manifold through the warped intake valves and seats.




Nice!!!

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: HardcoreB] #1095208
10/20/11 11:21 PM
10/20/11 11:21 PM
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Posts: 559
Idaho
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LaRoy Engines Offline
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Idaho
Ya gotta wonder, why didn't the engine builder check for water in the engine? We checked for fuel and oil, but not the water. We had the last clear chance to prevent this from happening.

Comp Cams was really nice about trying to get our engine back together. They had two machine shops standing by in Memphis to do anything we needed and they would pay the bill. They were going to give us whatever parts we would need from their warehouse or have it shipped in overnight.

It kinda came down to how many people did we want seeing what the ports looked like, in a set of 906 heads, that flowed 340 cfm with no welding or epoxy.

As the valves had seized in the quides and pulled them out of the heads, we borrowed a lathe and a machinist at Comp to rebuild the guides. Tom and Brenda Foley re-installed the quides and sized them as our crew polished the brass from the valve stems. Comp didn't have any valve grinding equipment so we assembled the heads without any valve seat grinding and had them ready to go back on while the 500ci "air cooled" short block was still warm from the dyno.

The head gaskets got there at 8:00AM the next morning and while Darren was running on the dyno, we assembled our engine and made our pulls right after him.

It actually turned out to be a lot of fun.

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: 340man4ever] #1095209
10/21/11 01:58 AM
10/21/11 01:58 AM
Joined: Dec 2007
Posts: 266
iowa
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rook440 Offline
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iowa
OO OOOO OOOOOOOOO !!!!!!!

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095210
10/21/11 05:38 AM
10/21/11 05:38 AM
Joined: Jun 2009
Posts: 438
Great Lakes Region
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abodiesonly1 Offline
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Great Lakes Region
Quote:

in a set of 906 heads, that flowed 340 cfm with no welding or epoxy.







Nice!!

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: abodiesonly1] #1095211
10/21/11 05:49 AM
10/21/11 05:49 AM
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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the frozen wastes...

Now THIS... is the build/contest i've been waiting for.

What were the rules for this contest? Or does anyone have a link?

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: LaRoy Engines] #1095212
10/21/11 12:33 PM
10/21/11 12:33 PM
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Posts: 30,945
Oregon
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AndyF Offline
I Win
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Oregon
Jim,

I built an inline box with a clear window for my water return lines just for that reason. This lets me look at the motor when it is running and see the water moving in the line. I had the same situation where the pump wasn't turned on in the dyno cell.

6881921-water.jpg (294 downloads)
Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: AndyF] #1095213
10/21/11 02:28 PM
10/21/11 02:28 PM
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Posts: 3,103
Phila Pa
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scatpacktom Offline
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Phila Pa
340 out of 906s with no welding and no epoxy. Those are some strong numbers, about 40 better than anything I've heard of before. I would be intrested to see them tested side by side with a known factor.

Re: Darren Tedder's 400 lo deck build- Mopar Muscle Contest [Re: scatpacktom] #1095214
10/21/11 04:56 PM
10/21/11 04:56 PM
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Posts: 74,904
U.S.S.A.
JohnRR Offline
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Quote:

340 out of 906s with no welding and no epoxy. Those are some strong numbers, about 40 better than anything I've heard of before. I would be intrested to see them tested side by side with a known factor.




I was thinking the same thing .

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