63MAKO Budget 355 Dyno
04-23-2015, 11:07 PM
#1
Race Director
Thread Starter
63MAKO Budget 355 Dyno
Dropped it off today. Dyno tentatively setup for Monday. Here is the build link.
https://www.corvetteforum.com/forums...get-355-a.html
Any guesses on results?
https://www.corvetteforum.com/forums...get-355-a.html
Any guesses on results?
04-24-2015, 06:46 AM
#2
Race Director
I'm very curious on what this makes. I just picked up and lightly used ZZ4 and it looks very nice. Was just going to slide in the LT4 Hot cam and some 1.6 rockers and call it a day. I'll have a little less head size then you have but I'll be watching this. I'll say 405 HP with 415 Tq
04-24-2015, 03:41 PM
#4
Dr. Detroit
Member Since: Mar 2012
Location: New Braunfels Texas
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Hydraulic Roller cam with 1.250 springs?
Even a stock Z-28 spring is 118 seat/340 open.....
If you have plenty of retainer to guide clearance...I would shim these to 1.700 installed......get as much pressure as you can get......
I am not saying it will not work....it is just a little light and if your power falls off upstairs....you will know why.
Jebby
Even a stock Z-28 spring is 118 seat/340 open.....
If you have plenty of retainer to guide clearance...I would shim these to 1.700 installed......get as much pressure as you can get......
I am not saying it will not work....it is just a little light and if your power falls off upstairs....you will know why.
Jebby
04-24-2015, 08:08 PM
#6
Race Director
Thread Starter
Hydraulic Roller cam with 1.250 springs?
Even a stock Z-28 spring is 118 seat/340 open.....
If you have plenty of retainer to guide clearance...I would shim these to 1.700 installed......get as much pressure as you can get......
I am not saying it will not work....it is just a little light and if your power falls off upstairs....you will know why.
Jebby
Even a stock Z-28 spring is 118 seat/340 open.....
If you have plenty of retainer to guide clearance...I would shim these to 1.700 installed......get as much pressure as you can get......
I am not saying it will not work....it is just a little light and if your power falls off upstairs....you will know why.
Jebby
04-24-2015, 09:06 PM
#7
Dr. Detroit
Member Since: Mar 2012
Location: New Braunfels Texas
Posts: 9,963
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2,564 Posts
Sure hope it does better than that.
Good Luck.
04-26-2015, 06:26 AM
#11
Le Mans Master
I would guess somewhere between 415-425 Gross HP/425 Gross Torque with the big variable, the heads but you know your stuff and if those heads flow like you say, you should be good to go.
As an aside, I finally had the oil pan leak fixed on my L-82 355 build yesterday by the engine builder…we pulled the L-82 pan off completely, straightened the pan, reused the felpro one piece oil pan gasket-sealant on both sides, reinstalled…no leaks. A few obersvations on the engine:
The pan was clean as a whistle…nothing in there..no sludge, filings..nothing after 700 miles. The cylinder walls looked perfect, roller cam lopes, etc. Now that the oil leak is fixed, going for the ARH LTH which I will install, and the builder will be installing the MSD digital E curve distributor along with rejetting the Holley 4175 650 CFM carb with bigger primary jets (63 main jet now) and an adjustable secondary metering block….We will get it on the Mustang dyno after all that but he is VERY confident that 450-475 Gross HP should be attainable…That would be great. I will be happy with anything over 425+Gross HP.
The builder has probably 6-7 cars on his Mustang Dyno every week for tuning..not just dyno pulls and knows his stuff..he had a 2010 C6ZR1 that he did a computer tune, LTH headers, Billy boat exhaust and K&N cold air intake…nothing else…525 RWHP on the mustang dyno which is about 600 RWHP on a dynojet, being conservative…pretty impressive-700+ HP on a stock internals ZR-1.
As an aside, I finally had the oil pan leak fixed on my L-82 355 build yesterday by the engine builder…we pulled the L-82 pan off completely, straightened the pan, reused the felpro one piece oil pan gasket-sealant on both sides, reinstalled…no leaks. A few obersvations on the engine:
The pan was clean as a whistle…nothing in there..no sludge, filings..nothing after 700 miles. The cylinder walls looked perfect, roller cam lopes, etc. Now that the oil leak is fixed, going for the ARH LTH which I will install, and the builder will be installing the MSD digital E curve distributor along with rejetting the Holley 4175 650 CFM carb with bigger primary jets (63 main jet now) and an adjustable secondary metering block….We will get it on the Mustang dyno after all that but he is VERY confident that 450-475 Gross HP should be attainable…That would be great. I will be happy with anything over 425+Gross HP.
The builder has probably 6-7 cars on his Mustang Dyno every week for tuning..not just dyno pulls and knows his stuff..he had a 2010 C6ZR1 that he did a computer tune, LTH headers, Billy boat exhaust and K&N cold air intake…nothing else…525 RWHP on the mustang dyno which is about 600 RWHP on a dynojet, being conservative…pretty impressive-700+ HP on a stock internals ZR-1.
Last edited by jb78L-82; 04-26-2015 at 06:30 AM.
04-26-2015, 10:52 AM
#12
Race Director
04-26-2015, 11:10 AM
#13
Race Director
I would guess somewhere between 415-425 Gross HP/425 Gross Torque with the big variable, the heads but you know your stuff and if those heads flow like you say, you should be good to go.
As an aside, I finally had the oil pan leak fixed on my L-82 355 build yesterday by the engine builder…we pulled the L-82 pan off completely, straightened the pan, reused the felpro one piece oil pan gasket-sealant on both sides, reinstalled…no leaks. A few obersvations on the engine:
The pan was clean as a whistle…nothing in there..no sludge, filings..nothing after 700 miles. The cylinder walls looked perfect, roller cam lopes, etc. Now that the oil leak is fixed, going for the ARH LTH which I will install, and the builder will be installing the MSD digital E curve distributor along with rejetting the Holley 4175 650 CFM carb with bigger primary jets (63 main jet now) and an adjustable secondary metering block….We will get it on the Mustang dyno after all that but he is VERY confident that 450-475 Gross HP should be attainable…That would be great. I will be happy with anything over 425+Gross HP.
The builder has probably 6-7 cars on his Mustang Dyno every week for tuning..not just dyno pulls and knows his stuff..he had a 2010 C6ZR1 that he did a computer tune, LTH headers, Billy boat exhaust and K&N cold air intake…nothing else…525 RWHP on the mustang dyno which is about 600 RWHP on a dynojet, being conservative…pretty impressive-700+ HP on a stock internals ZR-1.
As an aside, I finally had the oil pan leak fixed on my L-82 355 build yesterday by the engine builder…we pulled the L-82 pan off completely, straightened the pan, reused the felpro one piece oil pan gasket-sealant on both sides, reinstalled…no leaks. A few obersvations on the engine:
The pan was clean as a whistle…nothing in there..no sludge, filings..nothing after 700 miles. The cylinder walls looked perfect, roller cam lopes, etc. Now that the oil leak is fixed, going for the ARH LTH which I will install, and the builder will be installing the MSD digital E curve distributor along with rejetting the Holley 4175 650 CFM carb with bigger primary jets (63 main jet now) and an adjustable secondary metering block….We will get it on the Mustang dyno after all that but he is VERY confident that 450-475 Gross HP should be attainable…That would be great. I will be happy with anything over 425+Gross HP.
The builder has probably 6-7 cars on his Mustang Dyno every week for tuning..not just dyno pulls and knows his stuff..he had a 2010 C6ZR1 that he did a computer tune, LTH headers, Billy boat exhaust and K&N cold air intake…nothing else…525 RWHP on the mustang dyno which is about 600 RWHP on a dynojet, being conservative…pretty impressive-700+ HP on a stock internals ZR-1.
I thought I had it fixed so I took it out to row through the gears and had a huge backfire in second gear at 5000RPM.Scared the crap out of me because I thought I just blew up 15 grand worth of engine. MSD took it back and I got the normal mechanical one and no more backfire.
Just a note, don't compare C3 dyno numbers with C5-C7's they only lose 12-15% on the chassis dyno due to the fact their drive-trains are much more efficient. If that ZR-1 engine was in a C3 it would be closer to 450RWHP.
04-26-2015, 11:36 AM
#14
Le Mans Master
I would steer you away from the digital e curve, I had one 5 years ago and it backfired every time I started it.
I thought I had it fixed so I took it out to row through the gears and had a huge backfire in second gear at 5000RPM.Scared the crap out of me because I thought I just blew up 15 grand worth of engine. MSD took it back and I got the normal mechanical one and no more backfire.
Just a note, don't compare C3 dyno numbers with C5-C7's they only lose 12-15% on the chassis dyno due to the fact their drive-trains are much more efficient. If that ZR-1 engine was in a C3 it would be closer to 450RWHP.
I thought I had it fixed so I took it out to row through the gears and had a huge backfire in second gear at 5000RPM.Scared the crap out of me because I thought I just blew up 15 grand worth of engine. MSD took it back and I got the normal mechanical one and no more backfire.
Just a note, don't compare C3 dyno numbers with C5-C7's they only lose 12-15% on the chassis dyno due to the fact their drive-trains are much more efficient. If that ZR-1 engine was in a C3 it would be closer to 450RWHP.
I am well aware of the differences in RWHP between a C3 versus a C5-C7 chassis/drivetrain…It was more about the C6 ZR1 making about 60+HP with LTH, Exhaust and ECU tune….thought that was impressive especially since the C6 exhaust and Shorty Headers are pretty darn good stock.
04-26-2015, 12:17 PM
#15
I would guess somewhere between 415-425 Gross HP/425 Gross Torque with the big variable, the heads but you know your stuff and if those heads flow like you say, you should be good to go.
As an aside, I finally had the oil pan leak fixed on my L-82 355 build yesterday by the engine builder…we pulled the L-82 pan off completely, straightened the pan, reused the felpro one piece oil pan gasket-sealant on both sides, reinstalled…no leaks. A few obersvations on the engine:
The pan was clean as a whistle…nothing in there..no sludge, filings..nothing after 700 miles. The cylinder walls looked perfect, roller cam lopes, etc. Now that the oil leak is fixed, going for the ARH LTH which I will install, and the builder will be installing the MSD digital E curve distributor along with rejetting the Holley 4175 650 CFM carb with bigger primary jets (63 main jet now) and an adjustable secondary metering block….We will get it on the Mustang dyno after all that but he is VERY confident that 450-475 Gross HP should be attainable…That would be great. I will be happy with anything over 425+Gross HP.
The builder has probably 6-7 cars on his Mustang Dyno every week for tuning..not just dyno pulls and knows his stuff..he had a 2010 C6ZR1 that he did a computer tune, LTH headers, Billy boat exhaust and K&N cold air intake…nothing else…525 RWHP on the mustang dyno which is about 600 RWHP on a dynojet, being conservative…pretty impressive-700+ HP on a stock internals ZR-1.
As an aside, I finally had the oil pan leak fixed on my L-82 355 build yesterday by the engine builder…we pulled the L-82 pan off completely, straightened the pan, reused the felpro one piece oil pan gasket-sealant on both sides, reinstalled…no leaks. A few obersvations on the engine:
The pan was clean as a whistle…nothing in there..no sludge, filings..nothing after 700 miles. The cylinder walls looked perfect, roller cam lopes, etc. Now that the oil leak is fixed, going for the ARH LTH which I will install, and the builder will be installing the MSD digital E curve distributor along with rejetting the Holley 4175 650 CFM carb with bigger primary jets (63 main jet now) and an adjustable secondary metering block….We will get it on the Mustang dyno after all that but he is VERY confident that 450-475 Gross HP should be attainable…That would be great. I will be happy with anything over 425+Gross HP.
The builder has probably 6-7 cars on his Mustang Dyno every week for tuning..not just dyno pulls and knows his stuff..he had a 2010 C6ZR1 that he did a computer tune, LTH headers, Billy boat exhaust and K&N cold air intake…nothing else…525 RWHP on the mustang dyno which is about 600 RWHP on a dynojet, being conservative…pretty impressive-700+ HP on a stock internals ZR-1.
If you want a flexible / programable curve go with MSD programable units. I am using a MSD 6530 on my ZZ383. I have had nothing but good experience with this unit. When at the track all I do is connect the laptop, adjust the curve and go for another run until I get things working just right. I have added a MAP sensor so I can program vacuum advance functions etc. If not then stay with the Standard HEI units, but for performance motors why not use current technology to make things easier.
04-26-2015, 02:44 PM
#16
Le Mans Master
Skip the Digital E-Curve unit as the other poster has stated as well.
If you want a flexible / programable curve go with MSD programable units. I am using a MSD 6530 on my ZZ383. I have had nothing but good experience with this unit. When at the track all I do is connect the laptop, adjust the curve and go for another run until I get things working just right. I have added a MAP sensor so I can program vacuum advance functions etc. If not then stay with the Standard HEI units, but for performance motors why not use current technology to make things easier.
If you want a flexible / programable curve go with MSD programable units. I am using a MSD 6530 on my ZZ383. I have had nothing but good experience with this unit. When at the track all I do is connect the laptop, adjust the curve and go for another run until I get things working just right. I have added a MAP sensor so I can program vacuum advance functions etc. If not then stay with the Standard HEI units, but for performance motors why not use current technology to make things easier.
04-27-2015, 10:23 AM
#18
Race Director
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2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
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Looking forward to it. It's fun to see what you can get out of "mild" parts for low $$$. Sometimes they really surprise you when you stuff your foot in them.
JIM
JIM
