Dynamometer Results & Comparisons - HKE 468ci Chassis Dyno Results...

Original engine dyno thread here: http://www.ls1tech.com/forums/dynamometer-results-comparisons/1322399-468ci-pi-275-heads-harrop-itb-710hp-680tq-missing-power.html

Car: 2005 Corvette c6 Manual trans

Engine specs:

Block: ERL Superdeck 1 (Short deck)
Stroke: 4.250
Bore: 4.185
Heads: Performance Inductions 275cc Lxr Cathedral Port Heads:
2.20 Titanium intake valves/ 1.60 ss exhaust valvels
Intake: Ported (by Va Speed) Harrop itb manifold
Cam: HKE Hydraulic Cam
Lifters: Morel hydraulic
Pushrods: Manton
Rockers: Factory Ls7
Compression: 11.2:1
Wet Sump
Full exhaust: 2" headers 3" downpipe necked down to 2.5" Magnaflow c6 cat back
No air filters (custom cold air ram air plenum to come)
Fuel: 93 octane pump gas from random gas station
750rpm idle

670 rwhp SAE

632 rwtq SAE


http://i301.photobucket.com/albums/nn73/Stage7FD/CCF10302010_00000.jpg

Peaked HP @ 6000 rpm, and was still making 641rwhp at 6700 rpm when I shut it off. I can shift it at 7k+ if I wanted to. Running 25* of timing currently.

Only 4 pulls tonight. Only tuned the PE table for safe AFR. Ve table, timing, etc all left as it came from Ed when he tuned it on the engine dyno with the old cam. There is still a lot of tuning left with the new cam and from it being in a car vs. an engine dyno. The engine is still breaking in too.

Thank you to Kevin, Dan, etc @ Smalley Auto and Performance. Special thank you to Troy who came and took me from reading the HP Tuners correspondence course book while I was tuning, to helping me understand what I was reading, and showing me the math to do things right before I hurt anything! He was responsible for the 670/632 #.

And again, thank you to the best LS engine builder period (imho), though he would never say it: Erik Koenig of HK Racing Engines aka HKE.

I guess Cathedral port heads do work (of course they are based on a ls7 casting). Thank you for making them and offering them to us Cary. These are the 3rd set of Cary's heads I've had (previous ETP user), and they always perform. The Harrop works some too. I was going to buy a FAST 102 to test back to back, but I'm not going to spend the money to do that. If someone wants to send me one to test, I will put up the money for the install and take the time to tune for back to back tests.

Otherwise, we can all speculate what the hp difference would be, if any, between the 2 manifolds...

There's a claim that a 454ci LSX picked up 62 RWHP on back-to-back dyno runs....just swapping from a FAST 90mm intake to a Harrop 55mm ITB intake and re-tuning.......

It would be nice to see another test.......

.

Dang...that has to be a pump gas record! :cheers:

Congrats on the power, I know it was a ton of work, but it has obviously paid off!

Congrats to all involved on that project, makes me wish I had a Harrop :)

Sick N/A numbers..

Do you have a graph?
vids?

I gotta tell you I didnt like you engine HP numbers but your RWHP numbers are awesome.. :nod:
Congrats.

Do you think the engine will take 150-200shot??

Sick N/A numbers..

Do you have a graph?
vids?

I gotta tell you I didnt like you engine HP numbers but your RWHP numbers are awesome.. :nod:
Congrats.

Do you think the engine will take 150-200shot??

Yes, I have a graph and a video.

Thanks. Those are not my current engine HP #'s. The engine went back to HKE for a cam swap and has since been roughly tuned since it was on Va Speeds dyno. This engine makes over 760hp STD (the way engine dyno's are generally corrected) at the crank now.

150-200 shot? I have no idea nor desire for it. If I was planning for nitrous I would have given up stroke to 4.125" or less for more CH on the piston. I built this for N/A road racing/hpde, and to be a 50k mile street engine.

Erik surpassed my goals.

Dang...that has to be a pump gas record! :cheers:

Congrats on the power, I know it was a ton of work, but it has obviously paid off!

Congrats to all involved on that project, makes me wish I had a Harrop :)

Thanks Brian! I don't know about any records, but I know I love it. I think the Mast Mozez/Hillborn injected motor would have a lot to say about that record. :)

I'm looking forward to what you have cooking this winter. I will call you in a bit.
:cool: :secret2:

BTW...Erik's motor is ~1.63hp per cube on REAL 93 octane and 11.2:1 compression...lol ;)

There's a claim that a 454ci LSX picked up 62 RWHP on back-to-back dyno runs....just swapping from a FAST 90mm intake to a Harrop 55mm ITB intake and re-tuning.......

It would be nice to see another test.......

.

Thats what i want to see also!

With that size cam and the Harrop, the car has to be an insane driver.

Congrats!

Thats a very sick engine!!

Yes, I have a graph and a video.

Thanks. Those are not my current engine HP #'s. The engine went back to HKE for a cam swap and has since been roughly tuned since it was on Va Speeds dyno. This engine makes over 760hp STD (the way engine dyno's are generally corrected) at the crank now.

150-200 shot? I have no idea nor desire for it. If I was planning for nitrous I would have given up stroke to 4.125" or less for more CH on the piston. I built this for N/A road racing/hpde, and to be a 50k mile street engine.

Erik surpassed my goals.



Nice power Roberto-i would say you're making 760+ SAE at the flywheel. Looks like that cam worked out for you. This is just another testimate to Erik's ability to build great engines.

Awesome rwhp numbers on pump gas! Very impressive. :chug:

Yeah, you can't argue with those results at all. They are amazing.

I dont see it posted but what chassis? Rear? Trans?

Stout numbers for sure for a raodrace car. Whats the TQ curve look like?

Nice power Roberto-i would say you're making 760+ SAE at the flywheel. Looks like that cam worked out for you. This is just another testimate to Erik's ability to build great engines.

Well with your experience with the Harrop manifolds Shawn we did take your advice and pump the cam up on both sides so I am sure that picked it up even more more no doubt. I used the same exact lobes and lobe lift but just a few degrees larger so we could keep everything else the same and just swap it in same pushrods and all and get it back together fast.

I am surprised the Harrop does eat so much cam up like that but I guess it doesn't mind nearly as much as a manifold with a plenum that gets the dirty air in it and has to rebreathe it. Roberto says it still idles smooth and I know a FAST102 would be more rumpity rump so the Harrop and Cary's big cathedral heads do like each other at least.

Thats what i want to see also!

If you want to send me a FAST and tb (ls2), I will do the test.

With that size cam and the Harrop, the car has to be an insane driver.

Congrats!

Thank you! I just got home from putting 250+ miles on it today. I spoke with Brian Tooley for about a half hour while I was driving it, and he was surprised how quiet it was. With my old 402, I couldn't hold long conversations on the phone. It was much too loud.

Thats a very sick engine!!

Thank you.

Nice power Roberto-i would say you're making 760+ SAE at the flywheel. Looks like that cam worked out for you. This is just another testimate to Erik's ability to build great engines.

Thank you Shawn. The motor totally woke up with this cam it seemed. The hp falls off very slow, and it's making more power than I had initially targeted (I was hoping for legit 650rwhp/600rwtq). I wish it would have made some dyno runs with this cam on your dyno before it left. Erik said you guys did a good job porting the Harrop, and there was nothing he could do on top of it. I know that helps a lot with this combo.

I received about 15 pm's last week when I posted a video of my engine idling at 750rpms with the Harrop on the corvette forum. I gave everyone Va Speed's info, so you should be getting at least a few calls on the Harrop...

Awesome rwhp numbers on pump gas! Very impressive. :chug:

Thank you!

Yeah, you can't argue with those results at all. They are amazing.

Thanks!

I dont see it posted but what chassis? Rear? Trans?

Stout numbers for sure for a raodrace car. Whats the TQ curve look like?

2005 Corvette c6 Manual trans, RPS Street Carbon Twin (steel flywheel), 3.42 rear.

I'll post up the video and dyno sheet in a bit. There is still a ton of tuning to be done. This was basically touching up the base tune done by Ed. Now that it's on the road, the fun begins.

Nice numbers. HKE is finishing up a erl 454 for me. I hope to make 600 rwhp. Congrats.

SAE Corrected:

http://i301.photobucket.com/albums/nn73/Stage7FD/CCF10302010_00000.jpg

Again very nice and Congrats.

Erik and Shawn always do awesome work..
please dont forget the vids the C6 must be freaking fun to driver with HP & TQ with M6..
:D

Those are some crazy all motor numbers, congrats! I can't imagine pulling up next to that car at a stoplight:eek2:

Again very nice and Congrats.

Erik and Shawn always do awesome work..
please dont forget the vids the C6 must be freaking fun to driver with HP & TQ with M6..
:D

Thanks. What vids are you asking about?

Those are some crazy all motor numbers, congrats! I can't imagine pulling up next to that car at a stoplight:eek2:

Thank you...the funny thing is that if we were at a stop light, you would think my car was stock with maybe headers and a cat back. It's that quiet at idle (click on image for video):

http://i301.photobucket.com/albums/nn73/Stage7FD/c6/th_2010-10-22_20-53-44_588.jpg (http://s301.photobucket.com/albums/nn73/Stage7FD/c6/?action=view&current=2010-10-22_20-53-44_588.mp4)

Thanks. What vids are you asking about?



Anything idle , dyno , in car street WOT.. :nod:

Anything idle , dyno , in car street WOT.. :nod:

Click on the pic above your post for an idle video.

Damn that thing is quiet as heck. Congrats on a sick motor and car man. Have fun with it and go pick on some unsuspecting cars

Damn that thing is quiet as heck. Congrats on a sick motor and car man. Have fun with it and go pick on some unsuspecting cars

Thank you.

Here is a video of the dyno run (sorry for the crappy quality, it was a cell phone camera):
Click on link to view:

http://i301.photobucket.com/albums/nn73/Stage7FD/c6/th_lowerrez.jpg (http://s301.photobucket.com/albums/nn73/Stage7FD/c6/?action=view&current=lowerrez.mp4)

Here is a video of the dyno run (sorry for the crappy quality, it was a cell phone camera):Unreal. To the extent that a C6 Corvette can be a sleeper, that thing is a sleeper. Congrats on the fantastic results.

I thought this was going into a GTM factory five car? I'm confused now!

Unreal. To the extent that a C6 Corvette can be a sleeper, that thing is a sleeper. Congrats on the fantastic results.

Thank you. I'm loving it. I need better tires though with the cold weather hitting.


I thought this was going into a GTM factory five car? I'm confused now!

It was...but I decided to put it in my c6 at the last minute. Erik is building another motor for the GTM now.

i wish i they made this intake for the ls7 heads, but still retaining the ETC

i wish i they made this intake for the ls7 heads, but still retaining the ETC

Harrop sells an adapter plate. Oddly enough, I've heard it actually performed extremely well with the adapter plate. I was surprised.

It was...but I decided to put it in my c6 at the last minute. Erik is building another motor for the GTM now.

Whats going in the GTM?

i wish i they made this intake for the ls7 heads, but still retaining the ETC

I've been thinking the exact same thing.....:eyes:

Good god damn, that thing is a beast! I would love to build a motor like that someday :lol:

Dang that thing is tame at idle - bet your happy with that.

Can't wait to see what you let Erik build you for your GTM.

Whats going in the GTM?

The specs for my new motor have changed 4 times since I dyno'd this thing. But it will be big bore/big stroke with a top end to feed it for sure. I was 100% going with the Mozez top end, but Erik has had trouble getting pricing and info on it. Truthfully after seeing how much power this engine is making with cathedrals, I'm 2nd guessing if the Mozez is necessary for what I want to do. In fact, I would be happy with a mirrored engine in the GTM. It's unreal how fast it revs and how far it carries out the power well past it's peak.

I've been thinking the exact same thing.....:eyes:

The Harrop is etc (they have 2 versions). Again, you would need their adapter for the ls7 port, but I've heard the adapter actually makes the manifold perform better if you can believe that.

Good god damn, that thing is a beast! I would love to build a motor like that someday :lol:

Thanks

Dang that thing is tame at idle - bet your happy with that.

Can't wait to see what you let Erik build you for your GTM.

I'm more happy with the idle than the power believe it or not. If I stuck a Supervic or 4500, it would peak later and dyno much higher HP (I doubt it would make more torque though). My top concern from day 1 was idle quality with a huge cam, and that's why it won't see a carb style manifold.

I can't wait either. HKE is the best. I'm trying to do the one he building now less custom so it doesn't take as long waiting on custom pistons, crank, etc.

Need to post hp tq dyno with equal scales so the TQ doesn't look so funny! Tq curve is actually much flatter with equal scales. The dynojet software made different scales for TQ and HP exagerating the TQ so it looks really crazy.