I wonder if motor will ever get done

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rod7515

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When I bought my 66 Dart it had a 273 2 barrel carb. I knew I wouldnt be keeping it so I sold it right away, then the question was what engine do I put in it. The engine shop owner/builder is a big block person. He had ready to go a stroked 400 but after doing some research on headers I decided on a small block. He also had a 360 block that a prior customer had bored and decked then changed directions and never paid for it so I bought the block. Decided on doing a 408 stroker, and bought a skat crank kit and a comp cam solid roller kit in November. My first mistake was telling the machine shop I was in no hurry. So here it is the middle of July and its not done yet. Now Im not even close to being ready but everytime we try to get something moving on the project we run into a wall. First issue was the oiling in the lifter bore, the cam lift lift pushed the lifter up and the area between the roller and lifter skirt exposed the oil galley. Set cam back 2 times to reduce the base circle but with todays softer cores it couldnt be reduced far enough. Thanks goodness for MRL lifters as with the reduced roller size my problem was solved. Since comp didnt have lifters that would work I couldnt return them for any credit so I ended up selling them at a lose. Next issue, ARP main bolts, the set I got had bad threads on the longer windage tray studs so I had to buy another set and send these back for credit. Now last night the engine builder tells me that the comp kit valve springs didnt have enough pressure at opening for his liking. They are at 385 at opening and he wants to see 500+. So today I call back to comp and talk to them about this. I was told that if i was going to race it at all I should have springs that are 500+. So why would their kit not have them in it. Its a solid roller with a .590 lift. Even if I never raced it anyone that buys a cam with a .590 lift is going to run it pretty hard. Just doesnt make sense to me. I ask if the extra spring pressure would hurt the cam and was told no because it was a billet core, so why not have the correct springs with the kit. Well I had to order new springs and retainers because the springs are larger diameter. Yes I had to front more money for the new parts but will be given a credit once I send the other springs/retainers back. Now I am sure that the heads will need to have some additional work done to fit a different spring and I am hoping that the rockers wont need any mods.

I dont know what might be next but between the issues I have run into and the slow speed at which the engine is getting addressed I am very frustrated with this build.
Once I get the engine done I plan on dropping it in to the Dart and seeing what mods need done to fit the headers and exhaust then pulling back out so I can paint the engine compartment.

Thanks for letting me rant. I think I feel better now!
Rod
 
A .590 lift solid roller and your builder wants 500 plus open pressure? Ummmm......ok.
 
Comp wants that much as well if its going to be raced. Thats what I dont understand, if 500+ is ok then why doesnt the kit come with them. As comp said today when I spoke with them, 500 wont hurt the cam why would they put a lighter spring in the kit. Some things just dont make sense!
Rod
 
Comp has a few wacky spring recommendations in their kits....let me guess, they said you needed the 914-16 spring right? They said that for my cam as well....:wack:. My cam has less lift than yours (.576/.582) and I went with the their 939 spring setup at 1.85" (at the recommendation of Ryan J @ Shadydell). That gave me 185# seat and 457# open. I would have run more spring, but my rockers couldn't take anymore without having to switch to something else. With .590 lift on a roller (depending on the ramps) something over 500# open pressure is what I would look for too. With solid rollers it is safer to have a little too much spring pressure than not enough...if you bounce a roller by not having enough spring you will destroy it REALLY fast.
 
Thanks for that reply flyfish. And yes the original recommended spring was the 914-16. So as for my original comp cam kit the only parts I actually used from it was the timing chain and gears. I ended up with a different base circle grind, retainers and keepers were swapped out along with lifters and springs. It's disappointing as I have never had issues before with comp cams. I will say their customer service has been great in working thru this with the exception I always have to put out money for new parts then get a credit when I send old parts back.
I am glad to hear you agree with my builders recommended spring pressure. I'm not very knowledgeable about that area of engine builds but I trust my builders suggestions as he's been doing this for 30+ years and racing mopars for even more!
Rod
 
The new springs and retainers came yesterday so I took them to engine shop last night. Springs will work but retains only allow a 1.75 height and he wants 1.8. So I. All today and am told I will have to use a different keeper that will allow retainer to sit .050 higher because that is their tallest retainer. So now I'm waiting for the keepers to arrive beginning of next week.
Rod
 
Take it all back from the machinist and send it to MRL.
 
well motor is finally complete and ready for pick up. I plan on picking it up on Monday night. Everything looks good. I will post so pics once its painted and ready to drop in. Going to be a few months before I try starting it as there are many other things to complete.
 
I would find a stand and break it in.Months from now the builder aint gonna want to warranty it if anythings wrong.
 
I finally got it home!! Its going to be a while until I am ready for it but I can do things like paint it and fit the Kframe around the pan. I am thinking about installing it from underneath since I have a lift. Was wondering when others do it that way do you put the headers on before dropping car over the engine.
Rod
 
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