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So i'm finally going to be installing a cam here in the next 2 weeks. Im ordering the springs, pushrods, and ls7 sprocket today. I've got a 5.3l with the DOD system in it and I keep getting mixed reports about the lifters in it. Some say they are weak and will break and some say they are good. I would prefer not to pull the heads if I don't have to but if they are no good I need to know. Does anyone know for sure?
Chris, it kind of depends on how big of a cam you are gunna go with, what type of cam lobe design, and how stiff of valve springs you are gunna use.
It is known that the DOD lifters ARE weaker when used with Comp's XE-R and LS-K lobes due to their steep ramp rates. Also, anything over .580 lift will put a strain on them. What is the cam size you wanna go with?
Yeah, the cam I have picked is .588. I'm going to have to change for sure.
May want to try some LS7 lifters.Quote:
Originally Posted by pl4yboy
The Cadillac lifters (from the LSA, or whatever it's called) are supposedly a little better than the LS7 lifters. Cheaper too
I believe there are the LS7 lifters which are good up to 7k rpm and there are Caddy racing lifters that are good up to 8k rpm. The racing lifters are more expensive.
Doubt my 5.3 needs to go any higher than 7000. LS7's should be fine.Quote:
Originally Posted by ramair2002
Can they reduce performance when you are running stockers? My mechanic told me today that I need to replace my stock ones for high performance lifters ($250-300) because they might be stealing 30-40 hp.. Honestly I don't think so but what do you all think??
This is a topic based solely on NNBS lifters. Make a new topic please.Quote:
Originally Posted by White Devil
Also, I'd just like to point out from your previous posts... your mechanic is a complete fool.
almost goign to garrenty this statement. he is used to old school dinosaur motors and how the ABCs of them work.Quote:
Originally Posted by White Devil
you dont need to upgrade lifters unless youres are noisey
Thanks Quik!! but can they rob hp??
No, they do not rob hp.
224/228 580/585 113. Its a comp cam. I don't know what lobe design they are. Will the lifters hold for a couple of weeks till I can get some new lifters?Quote:
Originally Posted by txarkitekt
MMMMMMMMMM....that's borderline, and those lift numbers don't sound so aggressive compared to the duration. Plus you can get away with Comp 918 springs, which don't have a high spring rate. Actually, those cam specs sound well thought out. Either you have done your homework or somebody knows what they are doing spec'd it for ya. :thumb:
If it is only gunna be for a couple weeks, I say go ahead.
Well i'd like to take credit for the specs but to be honest I just got really lucky!! It came up for sale on here a couple of weeks ago and G called me up and said that I HAD to get this cam! I've already ordered the 918's, hardened pushrods, and ls7 sprocket. I'm not gonna have anything else other than the cam done to the truck till I get more funds together so its not like i'm gonna be running the piss out of it. I'm still gonna be TheSlowOne in town!
You know you will have to drive the piss out of it a little to see how it runs. lol Congards on the cam, i think its good choice. Cant wait to hear it.
Gonna be installing it this weekend at Garrissons. Be sure to stop by.Quote:
Originally Posted by ecld_07
you should do it all at once...will save a lot of repetative work
I agree. I'm taking everyones advice and putting off the swap for a couple of more weeks till I get everything i need to do it once and do it right.Quote:
Originally Posted by mean05
yea, my plans are shot for the weekend now thanks chrissy.....