tyler031734 Posted September 5, 2011 Share Posted September 5, 2011 (edited) I have a stock L28ET, will be 370cc injectors and msII running a mandrel down pipe and IC. Im concerned about valve overlap on a turbo engine possibly a bad thing, among other things. Is the cam possibly to big for my nice DD 240z? I think it maybe a good choice being as the operating range of the cam is low RPMs. I have little knowledge on cam dynamics and as for why this cam? Because its sitting on the shelf. any help would be appreciated Edited September 5, 2011 by tyler031734 Quote Link to comment Share on other sites More sharing options...
Pyro Posted September 18, 2011 Share Posted September 18, 2011 that is not a turbo cam. has narrow 110 lsa and more exhaust than intake duration. the amount of overlap a turbo engine can take depends on the restriction in the turbine. Small restrictive, low rpm boosting turbines can't handle any overlap. A big, high flow, higher rpm boosting turbine can handle more over lap. at what rpm does you engine start to boost and make peak boost? Quote Link to comment Share on other sites More sharing options...
tyler031734 Posted September 18, 2011 Author Share Posted September 18, 2011 I know its not a turbo cam. I have done some more reading and it seams like this cam is to big for what I want to do. I like having an engine making more boost down low. Ill probably put this cam up for sale. low hours and all. Thanks Pyro. Quote Link to comment Share on other sites More sharing options...
Pyro Posted September 19, 2011 Share Posted September 19, 2011 I found the stock non-turbo cam works well as a "performance cam upgrade" for a low rpm boosting turbo setup. The stock non-turbo cam has 8 more degrees of intake duration, as compared to the stock turbo cam, which is good for about 1000 rpm more of power band. Quote Link to comment Share on other sites More sharing options...
tyler031734 Posted September 21, 2011 Author Share Posted September 21, 2011 which is good for about 1000 rpm more of power band. Thats really all Id like to gain. I have a few heads on the shelf. I should do a little research on which cam would be the biggest. Still want to be internally oiled though. Quote Link to comment Share on other sites More sharing options...
Pyro Posted September 21, 2011 Share Posted September 21, 2011 use a cam out of a 75 to 80 L28 engine with a N47 head. These are the biggest internally oiled cams. I started with a stock turbo cam. It was ok for a stock turbo but ran out of rpms too early. So I put in a msa turbo stage 1 cam. The valve train was a little noisy for my taste and the power band a little too high. So after a few years of using the msa cam, I switched over to a stock non-turbo cam and I really like it. Quote Link to comment Share on other sites More sharing options...
neotech84 Posted September 21, 2011 Share Posted September 21, 2011 Just get one ground the way you want it. Not much more than a batch lot cam and you get to pick your specs. Quote Link to comment Share on other sites More sharing options...
tyler031734 Posted September 23, 2011 Author Share Posted September 23, 2011 I have one A cam from the N47 I have but its toasted! As for getting a custom cam, That sounds like a shot in the dark to me. I have no idea the amount of back pressure I have is and im always screwing with stuff. I may see if I can find an A cam, without having to spend to much cash for it. Quote Link to comment Share on other sites More sharing options...
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