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well for one, the car ran a 5.80 60-130. Solid, but not 690whp strong.
Second, there are some stories about weather station manipulation on that dyno.. they only post STD numbers and while the B3 is a really strong cam. it's not magic. the cars run times that align with everyone else around 650whp.
well for one, the car ran a 5.80 60-130. Solid, but not 690whp strong.
Second, there are some stories about weather station manipulation on that dyno.. they only post STD numbers and while the B3 is a really strong cam. it's not magic. the cars run times that align with everyone else around 650whp.
Yeah 5.8 may be a little slow for 69xwhp 3350lb RW C6Z but that car is also under geared.
If we use the ~680 SAE with a 12% drivetrain loss it puts it in the ~143 range.
This is a graph of trap speed vs 60-130.
Now why that is not the most scientific comparison (hope he takes it to the track to see trap speeds) it puts it right in line with where the car should be once it gets a 26" tire and more gear.
I think RPM has a combo that works and it upsets people but I would love to see some weather data.
PS: That 69x car is not a HCI car. They recently did an almost identical combo that made ~66x in a true HCI car.
My guess is that the injectors were flooding the runner walls and causing a lot of transient fueling issues, similar to what the holley ultra low ram was doing.
Tooley wrote in that FB thread that it was about proper injector aiming. Very likely true.
Interesting development related to the dyno numbers on the red RPM car....
That car just dropped a valve and the owner (Chris) and Fran (RPM) have been bickering on FB. One of Chris's comments says "Yea that’s what happened . More bullshit but wouldn’t except anything less from you. I’ll send you more micro fibers to wrap around your dyno sensor maybe you’ll hit 700 hp n/a cars with your set up on pump gas ."
So that more or less confirms my claim that RPM's dyno numbers are inflated.
For anyone wondering about this... Tore into this engine completely to see about some suspicions that other parties involved did not care to look for and found a few reasons for lack of power and rpm.
So what do you think happened here. Is there enough room on LSR block to pull the lifters out without taking off heads?
No, need to pull the heads. I looked them over, there was no sign of valvetrain abuse. I think it was just part of a bad batch of lifters from Johnson. They replaced them though.
But the metal from that is all through the motor. Some in the cylinders.
Interesting development related to the dyno numbers on the red RPM car....
That car just dropped a valve and the owner (Chris) and Fran (RPM) have been bickering on FB. One of Chris's comments says "Yea that’s what happened . More bullshit but wouldn’t except anything less from you. I’ll send you more micro fibers to wrap around your dyno sensor maybe you’ll hit 700 hp n/a cars with your set up on pump gas ."
So that more or less confirms my claim that RPM's dyno numbers are inflated.
More updates... The motor is at BES getting some love. Cylinders were honed/cleaned up. Pistons, rods, crank will be reused with a new set of bearings and rings. Heads just got back from Cesar at CT Porting. Had some tiny tiny cracks between the intake runners and valve cover bolt holes. Cesar ended up just cleaning the ports up until the bolt holes were completely through, so the valve cover bolts will just need thread sealant (not a big deal).
The two lifter bores need to be bushed still I believe.
Rockers are being decided on. Whether he buys some type of shaft system to use with the TSP roller rockers like the CHE or Comp BSR... Not sure yet on that.
Also need BES to decide on a new cam for it.
Final thoughts will be what manifold still. The MSD seems to have port matching issues with these heads (some have needed to use rtv to help seal the manifold). So either they make the MSD work or switch to another manifold. The trinity V2 is an option still, but it has been shown that a 112 does not fit under the hood of a C6 with a 112 on a trinity. So the question is, will a 103 let this thing make 680-low 700whp? What is the hp difference between the two.... 5hp? 15? 30?... I asked Tooley a few days ago what the plans are for the trinity for LS7s... He told me a 125 and a dual 90mm is being looked at which should both fit under a C6 hood. (HE WON'T LET ME CUT THE DAMN HOOD FOR A HI RAM )
I have a 112mm with my BTR Trinity and it fits with the stock hood on my C6Z. All I had to do is flip it upside down and bend the hell out of the power steering reservoir bracket to make room for the connector. It should also be noted that I have Hinson 3/8" shorter engine mounts too.
That said, I don't think there will be a notable gain between the 103mm TB and 112mm TB. I only ran the 112mm because I already had it.
I would still say go for a ported MSD. I have a Maximus 112SR that I'm going to be putting on mine as soon as the weather starts getting nicer over here.
I have a 112mm with my BTR Trinity and it fits with the stock hood on my C6Z. All I had to do is flip it upside down and bend the hell out of the power steering reservoir bracket to make room for the connector. It should also be noted that I have Hinson 3/8" shorter engine mounts too.
That said, I don't think there will be a notable gain between the 103mm TB and 112mm TB. I only ran the 112mm because I already had it.
I would still say go for a ported MSD. I have a Maximus 112SR that I'm going to be putting on mine as soon as the weather starts getting nicer over here.
He's got short amt mounts and I have some lingenfelter cradle spacers he can use if needed. Ben Knittle had to put a hole in his hood for a 112 on his trinity, but that was also the v1.. I don't know if @Ryans99ls1 tried the trinity on his car to check fitment.
He's got short amt mounts and I have some lingenfelter cradle spacers he can use if needed. Ben Knittle had to put a hole in his hood for a 112 on his trinity, but that was also the v1.. I don't know if @Ryans99ls1 tried the trinity on his car to check fitment.
I can't remember if i tried flipping it, but i do know that i didn't want to run it flipped. I have the amt 3/8 lower mounts in mine too and with the 112 TB installed in its normal position, i know that it was close enough to consider frame spacers or just moving a b92 hood. It was that close.
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