368 porting - dyno results
02-21-2006, 12:21 AM
#1
Drifting
Thread Starter
368 porting - dyno results
Finally got back on the dyno to see the results of my latest mods. My original thread about this project is now in the archives: click here Here are the dyno sheets showing before and after: The first one is with the additional intake port work and underdrive pulleys on the alternator and water pump. The second dyno graph is the same as above only with some prom tuning. I'm pretty happy with the results overall, the peak numbers are just awesome. I did lose some midrange torque however so it would appear that I traded some torque for upper end with my aggressive port work. Not sure how much of the gain is the port work and how much is the U-drive pulleys. Hopefully someone will test just the pulleys so we'll know. All in all average HP is up and in the 5500-7500rpm range where the engine will be during serious driving it's way up. I think there is still more power to be had, believe it or not most of the tuning involved removing timing from the stock timing curve?! We were getting a good deal of knock retard and finally eliminated it by removing 1-2 degrees, pretty much across the board. Next up will be a colder thermostat, we actually saw a peak of 484rwhp on the first pull after lunch. Seems like the engine likes running a bit cooler. With coolant temps around 195F the car was consistantly putting down 477-478rwhp. Anyhow thats it for now, a big thanks to dyno owner and forum member TJ Wong for all the help today.
Last edited by locobob; 02-21-2006 at 12:24 AM.
02-21-2006, 12:26 AM
#2
Team Owner
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St. Jude Donor '05
Excellent! Your work looks nice, Bob.
Can't say enough good things about TJ, either-Very talented guy.
Can't say enough good things about TJ, either-Very talented guy.
02-21-2006, 01:13 AM
#7
Drifting
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Originally Posted by DDSLT5
That damn thing still got texas plates? For how many years? 
02-21-2006, 01:34 AM
#8
Race Director
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Originally Posted by locobob
Naw, it's got Oregon tags now, TJ's just a little slow in the file updating/organizing department... hell I found some of Jeffs runs under my name
Tom is a great tuner on anything. LS1, L98, LT1 and LT5. Couldn't ask for anything more.
02-21-2006, 03:28 AM
#9
Drifting
Thread Starter
Originally Posted by Jeffvette
I believe it has more to do with the preset settings. We are the only ZR-1's that frequent his shop.
Tom is a great tuner on anything. LS1, L98, LT1 and LT5. Couldn't ask for anything more.
Tom is a great tuner on anything. LS1, L98, LT1 and LT5. Couldn't ask for anything more.
02-21-2006, 04:13 AM
#10
Drifting
Thread Starter
Originally Posted by DDSLT5
Impossible!
Hey Robert - now you know why I run a 160 stat!
Hey Robert - now you know why I run a 160 stat!
What cruising temps do you actually see in the CC readout with the 160 stat? I typically see 88-92C with my 180 stat.
02-21-2006, 08:38 AM
#11
Melting Slicks
locobob
Those are some power numbers for a 368.
Have you put enough miles on to see the water and oil temp differences, if any, with the larger water pump pulley. If so what are the results. What is the reduction percentage? Im very interested in any info regarding this.
Those are some power numbers for a 368.
Have you put enough miles on to see the water and oil temp differences, if any, with the larger water pump pulley. If so what are the results. What is the reduction percentage? Im very interested in any info regarding this.
02-21-2006, 11:24 AM
#12
Burning Brakes
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Originally Posted by ZR1 MK
locobob
Those are some power numbers for a 368.
Have you put enough miles on to see the water and oil temp differences, if any, with the larger water pump pulley. If so what are the results. What is the reduction percentage? Im very interested in any info regarding this.
Those are some power numbers for a 368.
Have you put enough miles on to see the water and oil temp differences, if any, with the larger water pump pulley. If so what are the results. What is the reduction percentage? Im very interested in any info regarding this.
PS......how is your 427lt5 project coming along at EES?
02-21-2006, 11:30 AM
#13
Burning Brakes
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It looks like you picked up 20+ rwhp with your porting project, not bad at all..........definitely worth your time!!! 
02-21-2006, 12:16 PM
#14
Team Owner
Originally Posted by locobob
What cruising temps do you actually see in the CC readout with the 160 stat? I typically see 88-92C with my 180 stat.
I cruise at oil temps of 167F, and coolant varies between 168-174F. Perfect temps for MAX power!
02-21-2006, 12:18 PM
#15
Melting Slicks
Originally Posted by Zr1 Destroyer
ZR1 MK, very nice pics of your car.....it looks like you keep it clean enough to eat off of! PS......how is your 427lt5 project coming along at EES?
PS......how is your 427lt5 project coming along at EES? I sent him a complete 95 engine in Feb, but due to hurricane issues, he wont start till April/May. Im not in a hurry anyway. Im only interested in quality. No down time since this is an extra engine.
02-21-2006, 12:18 PM
#16
Team Owner
Originally Posted by ZR1 MK
locobob
Those are some power numbers for a 368.
Have you put enough miles on to see the water and oil temp differences, if any, with the larger water pump pulley. If so what are the results. What is the reduction percentage? Im very interested in any info regarding this.
Those are some power numbers for a 368.
Have you put enough miles on to see the water and oil temp differences, if any, with the larger water pump pulley. If so what are the results. What is the reduction percentage? Im very interested in any info regarding this.
I have the same underdrive pulleys on my 415 - with the 160 stat, she has never run cooler - only in severe heat in stop/go traffic does it get to 195F, then both fans come on to pull it down to 180F, and turn off again.
02-21-2006, 12:52 PM
#17
Burning Brakes
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Originally Posted by DDSLT5
I have the same underdrive pulleys on my 415 - with the 160 stat, she has never run cooler - only in severe heat in stop/go traffic does it get to 195F, then both fans come on to pull it down to 180F, and turn off again.
02-21-2006, 12:58 PM
#18
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Originally Posted by ZR1 MK
Thanks for compliments on car. Im a waxer and track guy.
I sent him a complete 95 engine in Feb, but due to hurricane issues, he wont start till April/May. Im not in a hurry anyway. Im only interested in quality. No down time since this is an extra engine.
I sent him a complete 95 engine in Feb, but due to hurricane issues, he wont start till April/May. Im not in a hurry anyway. Im only interested in quality. No down time since this is an extra engine.
I'm trying to get Rod post some pics of his 427 bottom end before he straps on the heads!!!
02-21-2006, 01:35 PM
#19
Melting Slicks
Im considering an ATI damper that reduces all accessories by 35%.
My radiator and oil cooler is a Fluidyne setup similar to what some SCCA World Challenge cars use. Its a 3 row unit, but it also come 4 row.
My radiator and oil cooler is a Fluidyne setup similar to what some SCCA World Challenge cars use. Its a 3 row unit, but it also come 4 row.