new 428 project
Senior User
Joined: Sep 2006
Posts: 162
Likes: 0
From: Newbury Park Ca.
Hyper top gap.....
Originally Posted by RapidRuss
Pit, I believe the Hyper's exspand and contract less the other pistons..So it woud seem to me they would use a closer gap than a cast or forged?
RJ
RJ
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
Likes: 2
From: CT
Originally Posted by aMoneypit
Trust me here, the Hypers REQUIRE increased ring gap or they will burn up!!! The top ring groove is spaced higher, or maybe I should say the 2rd groove is lower than a "normal" piston. KB instructions caution using a standard formula ring gap for the top ring, and also say piston failure WILL be the result......Check the Hyper web site......Rather than .016 to .018 for a 4" bore, it would be close to .024".......TOP ring only.........Honest Injun........aMP
G.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Originally Posted by aMoneypit
Trust me here, the Hypers REQUIRE increased ring gap or they will burn up!!! The top ring groove is spaced higher, or maybe I should say the 2rd groove is lower than a "normal" piston. KB instructions caution using a standard formula ring gap for the top ring, and also say piston failure WILL be the result......Check the Hyper web site......Rather than .016 to .018 for a 4" bore, it would be close to .024".......TOP ring only.........Honest Injun........aMP
RJ
Thread Starter
|
Senior User
Joined: Apr 2007
Posts: 375
Likes: 0
From: Glenwood, IA
I just got a big blow!!! The machine shop called and told me that the block AND the crank are cracked!!! the good news is, I called the guy I got them from and he has more and is wiling to make it right. It is just going to prolong the project. Mud drags start may 13. ooch!!
Elder User
Joined: Feb 2006
Posts: 788
Likes: 0
From: Cascade, ID
What are the bolts going into the tops of the exhaust ports for? My '68 360 originally came from CA, so could they be some sort of early smog thing that was blocked off due to the engine being in a truck instead of a car.
Thread Starter
|
Senior User
Joined: Apr 2007
Posts: 375
Likes: 0
From: Glenwood, IA
New block and crank
I traded the guy for a std. 428 and std. crank. That made me and the machine shop happy. He will call me monday to let me know how the crack check goes, but it looks real good.
I was going to post some picks as progress goes but I cant figure out how to get them on here???
Anyway it looks as if it will go to .030 on the bore and the crank may stay std. with a polish
!
I was going to post some picks as progress goes but I cant figure out how to get them on here???
Anyway it looks as if it will go to .030 on the bore and the crank may stay std. with a polish
!
Elder User
Joined: Feb 2006
Posts: 788
Likes: 0
From: Cascade, ID
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread Starter
|
Senior User
Joined: Apr 2007
Posts: 375
Likes: 0
From: Glenwood, IA
COMP Cams Xtreme Energy Cam and Lifter, Advertised Duration 262/ 270, Lift .513/ .520
I just came from the machine shop and he got the pistons today. they are TRW forged. He is going to mill them out to match the combustion camber and get the compression down to 9.5:1. The heads have the CJ size valves but I chose to use the smaller port in order to keep the low end torque. It is getting a full internal balance job (no more special flex plate).
I am using edelbrocks RPM intake, Holley 770 street advenger carb with a 2" carb spacer, Hedman Elite Hedders with 2 1/2" straight pipes.
It should be a screamer and alot of fun to drive!!
I just came from the machine shop and he got the pistons today. they are TRW forged. He is going to mill them out to match the combustion camber and get the compression down to 9.5:1. The heads have the CJ size valves but I chose to use the smaller port in order to keep the low end torque. It is getting a full internal balance job (no more special flex plate).
I am using edelbrocks RPM intake, Holley 770 street advenger carb with a 2" carb spacer, Hedman Elite Hedders with 2 1/2" straight pipes.
It should be a screamer and alot of fun to drive!!
Thread Starter
|
Senior User
Joined: Apr 2007
Posts: 375
Likes: 0
From: Glenwood, IA
Can anyone desk dyno this for me? I talked to one guy that said it should be about 420hp and 500+ft/lb. I would like to know what you guys come up with and I would also like to know RPM range for peck power. Thanks
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Originally Posted by 428HIGHBOY
Can anyone desk dyno this for me? I talked to one guy that said it should be about 420hp and 500+ft/lb. I would like to know what you guys come up with and I would also like to know RPM range for peck power. Thanks
Anyway, I'd be glad to run it for you, but first what heads are you running, and are you porting them?
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Originally Posted by rusty70f100
The "peck power" only comes on when you're carrying a load of chickens!
Anyway, I'd be glad to run it for you, but first what heads are you running, and are you porting them?
Anyway, I'd be glad to run it for you, but first what heads are you running, and are you porting them?
I just couldnt help it..I was going to coment earlier..But I had work call...they need me on my day off!! Chit!! I'am gonna try and wiggle out of this one..I hope!!
RJ