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Horsepower Research 468 solid roller Dynojet numbers
After our initial break in dyno pulls, where can we go from here ?
We are base lined at 691/580 SAE, but we've got a few intake manifolds to test, so stay tuned.....
Big power...whats up with the torque from 3400 to 5K or so? Looks like it should have plateaued there as opposed to what it actually did.
Which intake was this?
Big power...whats up with the torque from 3400 to 5K or so? Looks like it should have plateaued there as opposed to what it actually did.
Which intake was this?
I'm running an ethanol fuel (AZ version of E85, which is currently E54), and this is using the Performance Design pTR highram intake with the long trumpets (runners).
My IAT circuit is faulty (showing -40) and during PE it's going super pig rich, causing that dip. We are awaiting a replacement harness assembly to fix the wiring, but during these runs we simply clear the DTC from the HP Tuner laptop.
698 RWHP@7300 ....and climbing.
This is with our "test" Holley high ram setup.
Comparison between my 691 baseline pull and yesterday's 698.....you can see the fueling differences in that 5000 range when peak torque is roughly. We will concentrate on getting that adjusted and we will see what the results are. Additional intake goodies arrive today
We just might cross that magical 7xx SAE RWHP line this weekend !!!!!
My 698 RWHP dyno with both of John's Monte Carlo LS7 dyno's overlayed onto it.
Look at the runtime conditions as well.
John's 694 was registered on his own dyno, which all of my runs have been made on.
John's 706 was registered on a dyno when the engine was fresh and the dyno was in the Pacific Northwest.
John B's LS7 powered Monte Carlo SS, 694 RWHP dyno pulls on his personal dyno versus Victor's HPR 468 C6 Z06 on John's dyno at 698 RWHP. John B's LS7 powered Monte Carlo SS, 706 RWHP dyno pulls on Pacific Northwest based dyno versus Victor's HPR 468 C6 Z06 on John's dyno at 698 RWHP.
Man this is an awesome thread, very interested to see what it does with different intake manifolds on. Any plans to use a msd or fast that would work with a factory hood? This is the biggest thing holding me back from taking the plunge into the big cube n/a world, i have about the same hood clearance as a c5/6 corvette in my little 3rd gen rx7. Ive been reading both your build threads and learning alot, keep it coming!
Man this is an awesome thread, very interested to see what it does with different intake manifolds on. Any plans to use a msd or fast that would work with a factory hood? This is the biggest thing holding me back from taking the plunge into the big cube n/a world, i have about the same hood clearance as a c5/6 corvette in my little 3rd gen rx7. Ive been reading both your build threads and learning alot, keep it coming!
I may be able to test a ,modified short runner MSD...I don't think the FAST 102 will be worth the effort as it's be supplanted by the MSD anyways.
We will try a CID intake with a Dominator 4550 to NW112 adapter plate as we know that will open things up a bit for guys who don't have hood limitations. This engine might find it's way into my 70 Chevelle which could use the CID with the Cowl Induction hood.
Having to sort out these strange AFR's (because of the MAF frequency range from the 112mm throttle body), but are now routinely hitting the low 700 RWHP mark.
703 RWHP and 573 Torque is where we ended up at..... and that number was reached with a 5" bell mouth installed instead of my 5" intake tube with a SD tune..
The tube is causing erratic MAF frequencys, probably because it's mounted too close to the throttle body blade.
I'll try my Halltech CF108 with the MAF forward design to see if that calms it back down.
If this thing doesn't run closer to 148mph I'd be pretty bummed.
Uncorrected numbers....the true RWHP put down on the dyno, is 670/547 ay 98* and 3.6% humidity (really dry that day).
Do you think 670 RWHP and a race weight of 3200 lbs is good enough for 148 MPH trap ?
I don't think so, personally
What was the best this motor did with the MSD (was MSD ported?) and say a 102 TB? I thought it was like 670hp and 560 tq corrected?
I never had the MSD on the car when it went onto the chassis dyno...though the numbers were very comparable to the pTR intake that did make that 670/560 number with the hydraulic cam and 112 TB.
Today, we put the bell mouth on the 112 TB and made some pulls......... 705 RWHP, 572 torque...SAE, with a 3.90 gear.(which cost approximately 2%)
Note how flat the power curve is up top with very minimal drop off at 7700 RPM where I'm still makiing 692 RWHP !!!!!
Went 143.45 at my first test and tune a month ago.
Cold ir is landing in Phoenix now, but our local drag strip has no drag racing action for the rest of the year
I'm going to have to travel to Tucson for a TnT on the 29th, but that track is up at 3000+ DA.
It would be interesting to see this combo w/ a LS3 low ram w/ the LS7 intake adapters and a pair of 4150 throttle bodies. I am looking to put that intake set-up on a NA big inch/big rpm LS. I have seen them make big gains over the hi ram on 7500rpm+ pulls.
It would be interesting to see this combo w/ a LS3 low ram w/ the LS7 intake adapters and a pair of 4150 throttle bodies. I am looking to put that intake set-up on a NA big inch/big rpm LS. I have seen them make big gains over the hi ram on 7500rpm+ pulls.
10-27-2021, 03:48 PM
Horsepower Research 468 solid roller Dynojet numbers 
