Jason 98 TA

Guys here's a video of the TSP LT1 on the engine dyno with PRC CNC Ported Heads & one of our prototype camshafts. Yesterday we pushed it past 630hp & hope to test a couple more grinds & maybe a ported intake asap!

http://www.youtube.com/watch?v=GJtCs...ature=youtu.be

VIN666

Is this with the stroker rotating assembly?

Jason 98 TA

Nope this is completely stock bottom end with heads & cam as the only two modifications. Its up over 110hp.

genv6.2gm

yes a ported intake would definitely be interesting

VIN666

That's what I was hoping to hear!
Man, loving the gains you guys are getting out of this engine.
When it comes time to start my C7 project, I am hoping to achieve ZR1 power, but NA.
That would be about the ultimate track day weapon.
Keep up the good work!!!

JMB

Awesome numbers.....WOW, thanks for the development time and results! I am really shocked by how high the peak HP & TQ RPMs were for what appears to be a relatively mild cam! Is VVT & DoD maintained?

peter pan

Awesome results and the LT1 likes to be modded

RoadRebel

Wow, nice work! But, does that state a correction factor of 1.145 STPcorr with a inlet temp of 70? I know you guys are up around 3000' but man 26.60in?

C7pimp

Then add some longtubes for another huge jump. That would be a 620~ hp combo!!

Jason 98 TA

Yeah the DA is always bad in Lubbock. I was under 4000' once... LOL

For reference our engine baselined at virtually identical to what Katech baselined their engine. The air is sampled in the intake tube so the dyno references engine incoming air about 8' from the throttle body in the giant black tube you see on the video.

Jason 98 TA

This is a VVT setup. No AFM. Typically it peaks earlier once its in the drivetrain compared to the engine dyno. It could easily make 30 ft lb more torque if we have more p/v so we could use the VVT more!

Late Model Racecraft

Finally someone else sharing results. The 110hp gain is obviously crank HP. What kind of HP or gains do you expect that heads/cam combo to make to the Rear Wheels and how long until you start testing in a vehicle?

Jason 98 TA

Our first test combo made 602 flywheel hp which was 517rwhp in a z51 m7. This latest combo will probably not make it into a car for a couple weeks.

We've actually been testing a lot, I just like to test test and retest. This engine has something like 150 dyno pulls! Lol

It's had heads on and off 6 times already!!

kiteboardr

Jason, great work! are your dyno results will all accessories running on the motor that would be found when the motor is in the car such as Alternator, AC, pump, ect?
In one of your posts you mentioned a $2500 heads/cam combo for the C7, is that what we are looking at here? If so I am interested

sallen619

Are your PRC CNC'd heads the stock C7 heads with your CNC port work?

WhiskeyTangoFoxtrot

Are you using the VVT Cam Phaser limiter block, like is used with other GM VVT cams to limit phaser authority ?

Jason 98 TA

Guys we have cnc ported heads in stock on exchange for well under a grand! Don't pay crazy high prices to the middle man. With over 10 cnc machines at our facility we've got your cnc work covered!!!

Elite275

I see that you offer several cam options. Could you tell a little about what distinguishes them from one another and the rwhp seen with each? Also what numbers have you seen with heads/cam/long tubes?

Jason 98 TA

As they go up in number they go up in duration & power output. What mods & goals you have for the car is really what determined what camshaft is best for your application. For example heres a dyno sheet from the LT1 VVT-2

T/A KID

Jason I may be interested in doing a head swap when I put on the TSP Long Tubes and X pipe I ordered (btw the exhaust system looks AWESOME).

Factory Compression is 11.5 (58-59cc???) how much milling can be done to raise compression before there is intake to head problems, 12.0?????
This engine uses TTY M12 head bolts and they can be bought for roughly 30 bucks and the 7 layer head gaskets are priced right too at around $43 a piece.

I don't want to do a cam, just be nice to have a 360cfm head on the car for $900, GREAT DEAL btw.


Edit: Just noticed stock head gaskets are .055 and Cometics are .051 so just SLIGHTLY more compression with the cometics, maybe better quench as well. Gaskets for the pair of GM are around $87 vs $240 for cometics, so hopefully milling the stock heads can gain some compression.