Dyno Results
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
Le Mans Master
Joined: Oct 2007
Posts: 9,682
Likes: 3,434
From: Akron Ohio
2025 Corvette of the Year Finalist - Modified
2024 C5 of the Year Winner - Modified
2023 C5 of the Year Finalist - Modified
2022 C5 of the Year Finalist - Modified
St. Jude Donor '09-'10-'11
Thread Starter
Burning Brakes
Joined: Aug 2005
Posts: 1,172
Likes: 9
From: '88 TPI L98/HotCam Powell, Ohio
I've had a few pm's asking for more details on the engine so here goes;
New GM block from Pace Performance. (4" finished bore w/cam bearings installed)
Scat 4340 forged crank (3.48")
Scat 6" forged I beams with 7/16" arp bolts
SRP Professional series piston kit -5cc (comes with rings and pins)
HSR, 48mm TB, 24 lb. SVO injectors, Hot Cam
Hooker 1.75" exhaust w/ 3" exhaust
TPIS CNC 113 heads with 60 cc chambers
That dyno sheet was required for me to run this past weekend so there was zero tuning that took place. I'm guessing it will be around 46 psi on the fuel and 12* advance on the timing when I get it dialed in.
** I have a 2.75" hi rise hood so this will not fit under a stock hood unless you buy (or make) the HSR shorter.
Matt
New GM block from Pace Performance. (4" finished bore w/cam bearings installed)
Scat 4340 forged crank (3.48")
Scat 6" forged I beams with 7/16" arp bolts
SRP Professional series piston kit -5cc (comes with rings and pins)
HSR, 48mm TB, 24 lb. SVO injectors, Hot Cam
Hooker 1.75" exhaust w/ 3" exhaust
TPIS CNC 113 heads with 60 cc chambers
That dyno sheet was required for me to run this past weekend so there was zero tuning that took place. I'm guessing it will be around 46 psi on the fuel and 12* advance on the timing when I get it dialed in.
** I have a 2.75" hi rise hood so this will not fit under a stock hood unless you buy (or make) the HSR shorter.
Matt
Last edited by mrc24x; Apr 13, 2011 at 09:28 AM.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
SRP Professional series piston kit -5cc (comes with rings and pins)
HSR, 48mm TB, 24 lb. SVO injectors, Hot Cam
Hooker 1.75" exhaust w/ 3" exhaust
TPIS CNC 113 heads with 60 cc chambers
That dyno sheet was required for me to run this past weekend so there was zero tuning that took place. I'm guessing it will be around 46 psi on the fuel and 12* advance on the timing when I get it dialed in.
HSR, 48mm TB, 24 lb. SVO injectors, Hot Cam
Hooker 1.75" exhaust w/ 3" exhaust
TPIS CNC 113 heads with 60 cc chambers
That dyno sheet was required for me to run this past weekend so there was zero tuning that took place. I'm guessing it will be around 46 psi on the fuel and 12* advance on the timing when I get it dialed in.
Guess you'll have to get milder ported heads to stay under your power limit! LOL
What's your compression with 5cc reliefs? Did you have the chambers worked over to get a couple extra cc's? Maybe part of TPIS's porting?
I bet there's another 20HP there -- with tuning.
How do ya like the HSR so far?
BTW,,,LOOKS GREAT!
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Racer
Joined: Sep 2007
Posts: 493
Likes: 0
From: Eden Utah
I finished up my HSR 350. I'm very happy with the results but I'm fighting a few electrical issues. (2 alternators quit in less than an hour of running??)
This was on a dynojet just after my kill switch was tested and the break in oil was still in the engine. Maybe 15 minutes of total time on it....
367 rwhp / 374 rwtq
Lets just say it has more potential and I need more ballast.
This was on a dynojet just after my kill switch was tested and the break in oil was still in the engine. Maybe 15 minutes of total time on it....
367 rwhp / 374 rwtq
Lets just say it has more potential and I need more ballast.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Stock TPI manifold ...................8” ...............runners 11.25”................ cylinder head 6”.............total 25.25”
Accel super ram manifold.......... 8”................runners 7.00”.................. cylinder head 6”............ total 21.00”
Holley stealth ram manifold ...........................runners 6.26” ................ cylinder head 6”............ total 12.26”
Edelbrock performer RPM .............................runners 6.00”.................. cylinder head 6”............ total 12.00”
Edelbrock Victor Jr .......................................r unners 5.50”................ cylinder head 6”............ total 11.50”
Taken from webarchive of www.stealthram.com/flowcomparison.html
The 8" entries on the TPI setups are the base measurements.
Racer
Joined: Oct 2007
Posts: 478
Likes: 1
"The 8" entries on the TPI setups are the base measurements."
Interesting. I had always thought the base had a runner length of about 6.125" going by the info I have seen. The SuperRam runners I am working on appear to be around 5" in length when I measured them. I used the piece of solder method and laid it out along the center line of the runner and checked both sides. The plenum is about .250" thick and the gasket about .060". If you want to add in the two gaskets than maybe a total of 5.375" from the intake base to the top of the plenum going by what I calculated.
The reason I did this was to try and match the total runner length to the 3rd harmonic wave and his dyno graph. I only shortened the total runner lengh 1". His AFR 195 heads are about 5.333" long.
Edit: With my curiosity up and went out a measured the runners wondering how they could have come up with 7" measurement. The closest I could do is measure the very outside back casting wall and I came up with about 6.750". That is a far cry from the center line of the port itself where it should be measured. So, something fishy about those numbers on that website.
Interesting. I had always thought the base had a runner length of about 6.125" going by the info I have seen. The SuperRam runners I am working on appear to be around 5" in length when I measured them. I used the piece of solder method and laid it out along the center line of the runner and checked both sides. The plenum is about .250" thick and the gasket about .060". If you want to add in the two gaskets than maybe a total of 5.375" from the intake base to the top of the plenum going by what I calculated.
The reason I did this was to try and match the total runner length to the 3rd harmonic wave and his dyno graph. I only shortened the total runner lengh 1". His AFR 195 heads are about 5.333" long.
Edit: With my curiosity up and went out a measured the runners wondering how they could have come up with 7" measurement. The closest I could do is measure the very outside back casting wall and I came up with about 6.750". That is a far cry from the center line of the port itself where it should be measured. So, something fishy about those numbers on that website.
Last edited by 1989TransAm; Apr 13, 2011 at 11:31 PM.