2highpsi

Finally managed to round up a set of Drag Radials and get the Stingray to the track.

2015 C7 Stingray Z51 A8 - stock except:
Magnuson TVS 2300 Heartbeat at 8.5psi
LT4 HPDI fuel pump and injectors
2.5 gal of 109 added to 3/8 tank of 91
Mickey Thompson SS drag radials

Launched at idle with T/C off, touring mode, and transmission in D. No problem with traction but the track was so packed I couldn't get another pass in (notice timestamp)
Plenty of MPH for better ET, but it looks like I need more work on that launch.

jacksnorm

Nice run...

T/A KID

Solid!!
What upper and lower pulley combo?

Patrick G

Similar MPH to mine, but I could not 60'. My time was 11.1 at 131.50mph. That was with the stock lower pulley and standard 87mm upper pulley. Boost was 6.5psi. This was before my C7 had headers installed. No mods on the C7 besides the Magnuson HB2300 SC. I expect better ET and MPH with headers and the newly installed 78mm pulley which makes 8.5-9.0psi boost.

T/A KID

Pat what size do they use for the lower? 8.75?

Patrick G

Whatever size the stock harmonic balancer is. 8.66" maybe?

2highpsi

Am running an 85mm upper, not sure what the lower is - I'll have to measure. It is a dedicated drive on this one and the lower is bigger than the standard C7 crank pulley.

Just started running water injection on the dyno engine, looking forward to adding it to the car and bumping boost/timing more as soon as it's dialed in.

How good it the drivetrain in these cars? Don't see any transmission problems (other than tuning) but how about diff/axles?

yell03

Very nice run, especially for your only pass

yell03

Stock tire?

2highpsi

Sorry for the misunderstanding, it was my 4th pass of the night, just wishing I could have had made more - I'm sure it wasn't my best yet. (kept making rookie mistakes, and I'm hardly a rookie)

Patrick G

No. I was running Nitto NT05 Drag Radials. The track just wasn't prepped too well. I was spinning off the line.

2highpsi

I'm not making as much power as you are, the car was at 615RWHP with the current setup. Id expect that you will MPH closer to 135

2highpsi

204mm (8.03") lower and 85mm (3.35") upper for a drive ratio of 2.4 putting me right about 15,000RPM blower speed at the 6300 RPM shift points.

Running this same pulley arrangement on the engine dyno produced right at 700HP @6200RPM (50/50 mix of 109 and 91 octane fuel and Magnuson HPDI fuel pump).

T/A KID

Very nice info!!

I currently have a 8.09 lower and a 3.0 upper on an eforce...

Been playing with the tune for last couple of weeks

Patrick G

When I ran 131.50mph, it was without headers and with the stock Magnuson pulley which made 6.5psi. On this combo, the rwhp was around 580rwhp on our Mustang MD250 chassis dyno. I have not been back to the track since recently adding the headers or 78mm pulley. Yes, I would expect the mph to be closer to 134-135mph with the current power.

3 Z06ZR1

How is the Eforce doing! Been thinking since you get another tank might think about it for the Z06.

T/A KID

The edelbrock tank is plastic and doubles the capacity of the z06 coolant setup.... Makes fluid changes easy too (I run straight distilled water in the summer/spring) plus you don't have to worry about the dumb air pocket on the stock system..

The eforce moves roughly the same air with a 3.0 as did the 1.7 with a 2.38 (same lower)

Steve@RSD

Did you try to launch it with launch control in the track mode? Just curious what that does for your 60'.

thegame

What ran 9.3 at 112mph?

NoOne

A car that let off or hit the brakes.