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Old 04-16-2012, 10:05 AM   #1
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Broke valve spring New build underway

I broke a valve spring last week and dropped an exhaust valve. The factory 4.6 is finished and i am surprised that is held together for so long running 13 to 14 pounds of boost. The good news is i have been finishing my teksid block build with Manley I beam rods arp2000 bolts/studs and CP pistons. I also am installing a set of Jon Kaase custom ported and polished heads with larger valves. I planning around 550-600 rwhp on pump gas. wish me luck
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Old 04-16-2012, 10:27 AM   #2
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Re: Broke valve spring New build underway

That's dope , congrats
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Old 04-16-2012, 11:23 AM   #3
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That's dope , congrats
Thanks looking forward to the pedal on the right
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Old 04-16-2012, 11:44 AM   #4
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Re: Broke valve spring New build underway

I have to ask, whyd you go with I beam rods instead of H beams? And what are your plans for the top end? I bet beehive springs are in there somewhere lol
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Old 04-16-2012, 12:44 PM   #5
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I'm sorry they are Manley H beam 4340 not I beam. My brain has been looking at 4.6 engine pars for the last week. The heads are PI heads that are being ported and polished and having larger valves installed. John Kaase racing engines is preparing the heads. Look him up they build some impressive stuff. The crappy part is my car had comp cams XE274's with comp cam beehive springs and titanium keepers. The cams have been installed for 5 years with no problems. We are installing different custom grind blower cams. I am waiting on the specs. I was driving the car home last week and got in it and it started missing like a bad coil pack. I drove another 10 miles. The next morning fired it up to test coil packs and boom that's all she wrote. I said oh well at least I was not stranded or on the other side I town.
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Old 04-16-2012, 12:50 PM   #6
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Re: Broke valve spring New build underway

That sucks!! Glad you were at home though. I have done quite a bit of reading on John Kaase and they do awesome work!!! Thats crazy that the beehive's broke though?? On the plus side, when John's team gets done, you shouldn't ever have to worry about it agian. Are you planning to up the boost on your vortech? And will you keep the aftercooler setup or switch to a FMIC if you do up it?
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Old 04-16-2012, 01:15 PM   #7
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Originally Posted by CodyNelson
That sucks!! Glad you were at home though. I have done quite a bit of reading on John Kaase and they do awesome work!!! Thats crazy that the beehive's broke though?? On the plus side, when John's team gets done, you shouldn't ever have to worry about it agian. Are you planning to up the boost on your vortech? And will you keep the aftercooler setup or switch to a FMIC if you do up it?
I am planning on running more boost. I would like to eventually go air to air down the road. I am keeping the after cooler for now.
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Old 04-16-2012, 01:21 PM   #8
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Re: Broke valve spring New build underway

Ive read that the aftercooler isnt as effective over 11 psi or so. I know you have an upgraded heat exchanger, so how far can you push it with out losing efficiency? I ask because I too have the aftercooler with upgraded exchanger and plan to do a build in the near future and was going to swap in an FMIC setup. But if the aftercooler will work, i may put money elsewhere
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Old 04-16-2012, 01:40 PM   #9
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I will have to see If intake air temps are with in reason after a couple good boost pulls on the dyno. It should not have any problem making power. I might be able to run less boost due to the efficiency of the new heads. I also am wondering if the 60lb injectors are going to be enough. We shall see. I have an 04 cobra tank and fuel hat. I am adding the aeromotive fuel system upgrade kit with rails and two Ford GT pumps with Kenne Bell BAP.
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Old 04-16-2012, 07:03 PM   #10
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Yeah making power should be no issue at all! I would say the 60s will be close but i think they are good for like 600rwhp. With the cams and heads you will definitely not need as much boost. I'd say that setup and around 16-18 psi will have you at or over 600. That is if your exhaust is up to it. I'm not sure that I've ever seen your exhaust setup listed
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Old 04-16-2012, 08:19 PM   #11
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I have kooks long tubes with custom stainless h pipe and magnaflow exhaust all stainless no cats
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Old 04-17-2012, 11:11 AM   #12
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Re: Broke valve spring New build underway

Sounds like your set then! Good luck and I cant wait to see/hear it!! Any timeline on getting it done?
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Old 04-17-2012, 11:27 AM   #13
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About a month or so I will have to upload a good sound clip video and burnout of course
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Old 04-17-2012, 11:48 AM   #14
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Re: Broke valve spring New build underway

Yes!! and a dyno pull with lots of pics if possible!! lol

Oh and the dyno graph of course!!
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Old 04-20-2012, 08:16 AM   #15
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Ordered my GT500 followers, Melling billet oil pump, and ARP 2000 head studs. The pistons are out having the valve reliefs cut.
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Old 04-20-2012, 08:56 AM   #16
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Re: Broke valve spring New build underway

sounds like a good build man..should do pretty well..what blower are you running and where is your compression on the new motor going to be at?
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Old 04-20-2012, 09:04 AM   #17
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I have a Vortech S trim that was at around 13-14 lbs. I am lowering the compression to 9.1:1. I am going to put a 2.95 or a 2.75 pulley on. I should be able to make a lot more power with less boost we will see.
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Old 04-20-2012, 11:39 AM   #18
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Re: Broke valve spring New build underway

HURRY!!!! I cant wait to see this thing!!
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Old 05-05-2012, 11:32 AM   #19
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Update: Heads are back from Jon Kaase and the long block is ready to go to proline for machining and assembly. I changed to eagle H beam rods and arp 2000 bolts. My buddy had a spare set. I also am using a Ford racing HO oil pump with TSS billet gears. I have decided to use a Edelbrock Vic jr lower intake with Modular head shop elbow so I can get the most from my heads. I have decided to use Comp cams XE270ah cams. I used these before and they make good power for street application.
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Old 05-05-2012, 01:42 PM   #20
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Nice. I'm excited for you.
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Old 05-06-2012, 09:45 AM   #21
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Thanks I haven't driven my mustang in a month now and I'm ready to get this project back on the roads.
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Old 05-07-2012, 11:16 AM   #22
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Re: Broke valve spring New build underway

SWEET!! How long do you anticipate it will take to get your long block back? And have you decided what/if any changes you will make to your blower setup? (boost, fmic, etc?)
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Old 05-07-2012, 12:41 PM   #23
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I should have the block back in 2 weeks. I am going to leave the air to water on it for now. Im putting a edelbrock Vic Jr lower intake on it to accommodate these heads. I am going to leave the pulley that's on it for now and see what it makes. I was making 13-14 pounds of boost before (3.125). I also have a 2.95 an a 2.75 so we will see.
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Old 05-07-2012, 01:59 PM   #24
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Re: Broke valve spring New build underway

I would say you will be right around 9-10 psi but the power should be lots of fun!! And good call on the eddy intake, those things are worth like 60hp with boosted applications
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Old 05-07-2012, 02:03 PM   #25
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I would say you will be right around 9-10 psi but the power should be lots of fun!! And good call on the eddy intake, those things are worth like 60hp with boosted applications
That's what I was thinking . I have a 4 position SCT switch panel and I am going to do a C16 tune for the track.
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Old 05-07-2012, 02:06 PM   #26
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Re: Broke valve spring New build underway

That thing is going to be a monster! What numbers are you shooting for? Still 550-600? I would say that with 93 octane at 10 psi with your setup 550 would be a really good goal
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Old 05-07-2012, 02:09 PM   #27
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You are on point that combo should be right between 550-600 on 93. I should be able to squeeze a little over 600 on C16 tune we will see.
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Old 05-07-2012, 03:10 PM   #28
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Re: Broke valve spring New build underway

Good luck Im excited to see the numbers!
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Old 05-07-2012, 06:07 PM   #29
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Re: Broke valve spring New build underway

heads look bad ***!!!!!!!!..dont know about 10lbs of boost and 550rwhp but it will run great!!!!!!!! your going to have a good running setup thats for sure
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Old 05-07-2012, 06:53 PM   #30
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heads look bad ***!!!!!!!!..dont know about 10lbs of boost and 550rwhp but it will run great!!!!!!!! your going to have a good running setup thats for sure
The car made 459rwp with 13-14lbs Of boost on stock 2v heads, stock lower and accufab plenum with comp cams XE270ah. That was conservatively tunes with stock bottom end. I will have to change the pulley to get 550 or more but I know this combo will make that all day. I'm thinking a 2.75 pulley should get me to that 550rwp window. We will see.
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Old 05-07-2012, 09:34 PM   #31
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Re: Broke valve spring New build underway

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The car made 459rwp with 13-14lbs Of boost on stock 2v heads, stock lower and accufab plenum with comp cams XE270ah. That was conservatively tunes with stock bottom end. I will have to change the pulley to get 550 or more but I know this combo will make that all day. I'm thinking a 2.75 pulley should get me to that 550rwp window. We will see.
yeah but that was higher compression(stock) also...eddy loose alot of bottom end..the 278s are a good cam but they are big and dont need big cams for a centri car..which will push your power band even further up in the rpm..and remember you just have a little s trim you have to over spin them to make some great power..but the thing about the s trim is they like to be over spun..if i where you i would go with the 2.75 pulley off the bat..dont mess with the smaller pullies..you have heads and bigger cams so boost will be lower with the same pulley you are on...i would also look into a IW 10% pulley to prevent the belt slip even more also and will spin the blower faster!!!
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Old 05-08-2012, 06:20 AM   #32
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I am running xe270 cams. The IW balancer should be here this week. You are right about the pulley I wanted to see what it would make with the 3.125 pulley. Happy boosting
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Old 05-08-2012, 07:06 AM   #33
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Uh when you get that monster up and running you have to make a video of it. I want exhaust clips walk arounds and some take offs. That car is gonna be a beast. You need to submit your car to 5.0 magazine or muscle mustangs. They never have 2v articles. Yours would qualify! Nice set up man.
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Old 05-08-2012, 07:07 AM   #34
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Uh when you get that monster up and running you have to make a video of it. I want exhaust clips walk arounds and some take offs. That car is gonna be a beast. You need to submit your car to 5.0 magazine or muscle mustangs. They never have 2v articles. Yours would qualify! Nice set up man.
Thank you I will upload some videos.
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Old 05-08-2012, 07:18 AM   #35
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Re: Broke valve spring New build underway

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Uh when you get that monster up and running you have to make a video of it. I want exhaust clips walk arounds and some take offs. That car is gonna be a beast. You need to submit your car to 5.0 magazine or muscle mustangs. They never have 2v articles. Yours would qualify! Nice set up man.
they have done quite a few 2vs in MM&FF mag...my car actually supposed to be in it this year when done and also supposed to be in KOTS in bowling green
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