Stock 18 SS with TVS2650 - 728 RWHP
 

My son finally had a chance to get to the Dyno with his Camaro SS A8. His car has a Maggie 2650 and port fuel system that he designed and we built.

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Mods include a TVS2650, our port injection system, and our additional in-tank 525 l/hr fuel pump. We use a 90mm pulley pulley which gives a peak of 14psi with the stock throttle body and airbox. Straight E85 out of the pump is in the tank (gotta love $17 fill-ups of 100+ octane) which reads 74% alcohol on the flex fuel sensor.

Car is otherwise completely stock (LT1 injectors, LT1 pump, returnless fuel system, throttle body, airbox, stock exhaust with 4 cats and factory dual mode exhaust)

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First pull right off the street was 705.9 SAE RWHP, added a bit more timing and next pull was 728.5 followed by a back-up pull of 728.8. This was a new dyno to us, all previous pulls on this car were on a dyno that used an STD correction which will generally run 4% higher so I expect it would be about 760RWHP if run at our previous dyno.

With at least 325 RWHP over stock, the car is a blast to drive, granted traction is a problem on the street, but the TC (with some tuning) does a pretty respectable job of harnessing the ponies in gears less than 5th.

I'm really proud of the work he did on his car and looking forward seeing him get back to the track. This car was running 128 MPH with only the TVS2650 and 91 octane, 140MPH might be in reach now on this daily driver.

Amazing! Nice work! I look forward hearing more about the port fueling design as I just installed a Maggie 2650 on my SS and hated giving up the e85.

This is the goal and the dream! Thank you for sharing toohighpsi, I hope I will be able to figure out the port injection with the magnuson 2650 on the LT1 as you and your son have, congratulations to you both.

Great results! I too am interested in seeing and hearing about your port injection system.

Wow, great. Any info for the port injection system? Are you going to sell the products.

Great job guys, those were really good numbers on 91 octane but wicked numbers on E85. I'm guessing he will have that injection for sale at some point. I'd say you'll be pushing 138 mph, I was looking back at some of my time slips and thinking about what my rwhp was when I was running that mph. Congrats on how well that port injection works, I knew you'd get it worked out and to make that power on the Lt1 pump and injectors is pretty cool.

Those are great numbers , what kinda boost did it run when it was doing 128mph?

I think it was around 8-9 lbs it had like a 105 pulley and ran 10.80s or 90s. Can't remember which one it was.

Congrats on the achievements!

Pics or it didn't happen

Any plans to address the pistons? At those power levels they are going to be on borrowed time for sure.

Great info! Congrats guys

Soon :smiling1:

Its a fairly conservative tune, IATs with the 2650 are almost always under 100F and with port we're not running at best power A/F as we also have catalysts to protect - we're at .75 lambda at 6500 rpm.

There is a point where pistons can become a problem, but it's north of 750 RWHP with a properly tuned system. Most LT1s break pistons about 650 RWHP because of fuel quantity/quality issues and occasionally tuners that don't fully understand the operating principals of the DI fuel systems.