454mag rebuild in progress
04-19-2005, 08:33 PM
#81
JC Performance Engines
Gold MemberThread Starter
Re: 454mag rebuild in progress
Pat, great meeting you too.
I hope to hook up w/ you CT guys this summer.
Well, the carb was on the fritz so we need to pick up another one.
I don't want to post any bullsh!t #s, so hang in there w/ me.
I hope to hook up w/ you CT guys this summer.
Well, the carb was on the fritz so we need to pick up another one.
I don't want to post any bullsh!t #s, so hang in there w/ me.
04-24-2005, 03:30 PM
#83
JC Performance Engines
Gold MemberThread Starter
Re: 454mag rebuild in progress
I'm on vacation... but it should be by Tuesday.
The dyno is pretty busy these days, tough to get some time on it.
The dyno is pretty busy these days, tough to get some time on it.
04-26-2005, 08:24 PM
#84
Registered
Re: 454mag rebuild in progress
Originally Posted by Stormrider
I'm on vacation... but it should be by Tuesday.
The dyno is pretty busy these days, tough to get some time on it.
The dyno is pretty busy these days, tough to get some time on it.
04-26-2005, 09:21 PM
#85
Registered
Re: 454mag rebuild in progress
Originally Posted by Crazyhorse
KAAMA, I know we've discussed this at length before (over bags of Oreo cookies and Cokes)
and I can understand the theory behind it but I still don't think that it's good for the 20 to 30 horsepower that has been suggested, depending on the engines being built. I find it hard to believe that SuperV's engines would have made another 20-30 on the dyno down at Earhart's shop that day.
In a nutshell, bore-notching is grinding away the cylinder material that hangs out past the head gasket in the areas near the valves. Lay the headgasket on the block and notice the oval appearance of the gasket hole and the metal that can be removed from the bore, effectively unshrouding the airflow path into the cylinder.
I'll admit that it can be done cheap enough to be worth the effort.
and I can understand the theory behind it but I still don't think that it's good for the 20 to 30 horsepower that has been suggested, depending on the engines being built. I find it hard to believe that SuperV's engines would have made another 20-30 on the dyno down at Earhart's shop that day.
In a nutshell, bore-notching is grinding away the cylinder material that hangs out past the head gasket in the areas near the valves. Lay the headgasket on the block and notice the oval appearance of the gasket hole and the metal that can be removed from the bore, effectively unshrouding the airflow path into the cylinder.
I'll admit that it can be done cheap enough to be worth the effort.
I bore notched a motor on Earharts dyno. (Not somthing I would recommend doing on an assembled motor). We made a pull on the motor, yanked the heads bore notched the block and made another pull. All within about a three hour period. Nothing else was changed. The results were a 30 hp gain.
Look at the block when you remove the head of a 454 and you will clearly see the dark areas where the gasket is scalloped out. Please tell us why it doesent work.
04-29-2005, 01:43 PM
#86
JC Performance Engines
Gold MemberThread Starter
Re: 454mag rebuild in progress
Alright guys... I'm back from vacation and the engine has been dynoed. I am very happy with the results.
Here is the dyno sheet.
04-29-2005, 07:12 PM
#87
VIP Member
VIP Member
Re: 454mag rebuild in progress
Vary Impressive!
Max HP @ 6000rpm; Is that were you will prop the boat?
If so, I would start with a 24p Bravo I...
Good Luck with Her Storm!!!
Max HP @ 6000rpm; Is that were you will prop the boat?
If so, I would start with a 24p Bravo I...
Good Luck with Her Storm!!!
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Patrick
Patrick
