Jason 98 TA

Just thought I'd drop you guys a quick message & let you know we broke 600 flywheel hp with stock exhaust manifolds still on the engine dyno LT1! That's up over 80hp from our baseline with a small camshaft & stock compression cnc ported heads!

I expect headers & just the right camshaft & we'll see over 630hp easily.

These parts aren't available for order yet, we still have a different head design to test & we are just getting started collecting camshaft data side by side on the dyno. I fully expect I can give you guys a camshaft alone that will make over 80 in the next week.

venomws7

Very nice work TSP like always.

BeaZt

Just to be clear. You are saying you may hit 600hp na?

carlrx7

Someone leave a nitrous bottle open in the dyno room? lol Good work guys! Keep it up! Looks like you're at the top of the power curve so far!

peter pan

Impressive gains

ghostmech

Are you saying a baseline LT1 makes at least 520HP at the flywheel? Then with your conservative mods, made over 600HP or did you start with the mods on a stock LT1 to make 520 then made over 600 with what changes?

Racer X

I don't see on this thread or the other where he lists a baseline. I think 520 is the "baseline with a small camshaft & stock compression cnc ported heads!" and stock manifolds. I think the 600 is with a big cam, ported heads and stock manifolds and presumably tuning.

Another thing we don't know is this corrected to SAE or STP. Katech got 464 and 487 as baselines depending or the correction factor, but that has the stock intake housing. This from the video is a straight airfeed to the throttle body. I suppose the 520 could be stock with a straight airfeed with no filter at STP.

I look forward to his answer.

BuddhaZ06

It made 518hp stock. Minus cats and front accessory drives. Then it made 600 with ported heads and a cam.

Racer X

That tells you something about how much all the accessories take to drive. A lot more than I expected.

obzidian

518hp with Dyno headers?

Jason 98 TA

Guys to clarify the engine doesn't have accessories & while its still on manifolds, it does not have cats.

Stock with no cats, dyno intake tube & no accessories is how it made the 520ish baseline. The 600hp was swapping in one camshaft & the prc ported heads. I believe the heads made just at 25hp.

We're still real early in testing, I have no doubt with some tweaks we will find a lot more hp out there.

Trevor @ Texas Speed

Here is a video of the heads/cam pull. It made 601.8 HP and 518 TQ through stock exhaust manifolds:


The 518 HP was a baseline with stock internals. The engine does not have any front drive accessories, catalytic converters, or factory air induction. Katech's engine produced 500 HP with an aftermarket air induction, so that would be right in line with our engine that doesn't have accessories. We still have the engine in our Corvette completing the long tube headers and exhaust system, so we were not able to run the dyno engine with all of the accessories on the front of it. All of our engine dyno numbers are in SAE. That is the only correction factor available on our engine dyno. Our chassis dyno does allow for multiple correction methods, but we use SAE for everything.

We do expect our next cam with headers to produce right around 630 HP. We test multiple camshafts before we bring the final products to market. We want to KNOW that what we offer to our customers is the best, not just the first. Once the testing is completed on our engine dyno, we will then install the same package in our car for chassis dyno numbers.

Enjoy!

PowerLabs

Not really. Your accessories are:
1- Air Conditioner => Not run during dyno tests
2- Power Steering Pump => Electric, not run during dyno tests
3- Oil pump => Still running during dyno tests
4- Water Pump => 1-3 HP (A meziere electric pump draws about 0.22hp)
5- Alternator => 0.5 - 2HP (at FULL output, 14Volts at 100Amps = 1400Watts = 1.8HP out, 2.2HP drive assuming 80% eff).

There's something "interesting" happening here and it is not the accessories.

Trevor @ Texas Speed

There's actually nothing "interesting" happening at all. The balancer has the parasitic loss of turning a belt as well, which we were not running. I'm not sure how it would benefit us to show higher numbers on a stock engine than what it makes. No factory induction, no cats, and no belt all add up quickly.

Suns_PSD

It would be more accurate to claim a 15% power increase imo with your cam and porting. I think announcing 600 hp gave a few of the older members heart attacks, or boners, or both!

NemesisC5

Jason 98 TA, how much do you "guestimate" the factory cats cost in horsepower?

Trevor @ Texas Speed

600 HP is much better marketing than 15%. They're all accurate numbers. It just depends on how you want to label it. They're both correct. We certainly to want to be responsible for heart failure or arousal, though!

I would estimate the lack of catalytic converters to add a solid 10-15 HP. It's hard to say since the cats haven't been tested on the 2014 Corvette yet. It certainly could be more. We will have more of this information once we complete the prototype headers and x-pipe on our Corvette and can do some back-to-back testing.

Katech_Zach

Trevor is right on. Going from factory manifolds and cats to headers with no cats on the engine dyno we made 10hp/19tq

arghx7

Sounds like the old "gross" horsepower numbers from the 60s.

NemesisC5

My question was how much HP do cats alone cost you?

Factory Manifolds/Cats vs. Factory Manifolds/No-Cats

The dyno run was with no cats and delete accessories. How much did running no-cats add to the dyno pull numbers. I know it's likely a guess but your guess is better than mine.

Also, the 10hp/19tq on engine dyno is interesting......header only threads have claimed 30+/hp and 40+/tq...to the rear wheels