ol dusty

I know not a lot of people on here are likely to even car about d-series since I'm sure there aren't too many teg's with a SOHC but I once built a N/A d16. then it blew up. Salvageing what I could the head was fine. I posted the cam up for sale as it's only got about 5 weeks on it and so far the first person interested is wondering if it would be good for a turbo set up. I do know that crower makes two seperate cams for the two setup's so it's prolly not as good as the turbo one would be but would it be better or counter productive on a turbo build?

FuzzyLS BRO

I don't know about the sohc motor, but there are a number of people making way better numbers on the crower 403's and 404's (NA cams) for the LS motor. they are making much better power compared to the crower turbo cams.

i also have a friend who's running a boosted single with a zex nitrous cam and it seems to be working out for him because his car pulls like a bitch on the high end. look up specs for the cam and see if it'll work for a turbo setup.

black_ac_gsr

iTrader: (3)

this is a crower n/a cam your talking about? probably still has higer lift and more duration then stock so it would probably increase flow in the head a bit more if he used it, just wouldnt get the same gains as the turbo cam. People turbo those on the stock cam you just wont make as good of power as would with the built engine.

BestodaBest

The main differences between turbo and N/A cams are the lobe profiles.

Generally, N/A cams strive to achieve optimal valve overlap to promote cylinder scavenging.

Turbo cams attempt to eliminate valve overlap.

Basically, having valve overlap is alot like having a small leak when your trying to fill a balloon (in boosted applications).

ol dusty

Stage 2 - Designed specifically for turbo charged and supercharger applications.Features short duration and high lift.Requires springs and retainer kit.312 / 318234 / 217430 / 427Stage 2 - Street/Strip with slight lope at idle due to increased primary and secondary lobes.Requires 84166 kit.900-7500+ rpm.319 / 310235 / 223432 / 436
These are the specs of the two cams numbers are for advertised duration, duration @.050" and gross lift w/ 1.6int / 1.8ext respectively.

Basically from this I thought the over lap would be why they'd be counter productive. Obviously I'd rather have a turbo specific cam in a turbo setup but is it a waste to put the N/A cam in or stay stock?

BestodaBest

In a DOHC, it's rather easy to cope with; you can merely tune a good majority of it out with a good set of adjustable cam gears.

For SOHC's though, your not so lucky. For now, just run your stock cam, and worry about other issues that are bound to pop up. Changing cam's are at the bottom of the list.

There are other significant improvements that need to be made. For instance, buying a DOHC... jks :P

zman

thats only true to an extent.

As I dialed out the excessive overlap of my stage2 cams on my boosted b16, the power across the board (especially top end) suffered quiet a bit. I was trying to get a smooth vtec crossover, and as I dialed out the overlap the vtec crossover smoothed out, but like I said, the power/torque went down a fair bit. This to me, was the first sign that the cams I was using were too big for a boosted b16. So I put the stock b16 cams back in and now the vtec crossover is very smooth and the power up top is very strong. No dyno results yet though with the stock b16 cams.

ol dusty

From what I understand so far the overlap would be an issue and a lot of work for saving a few bucks. like I said the guy wants to buy my N/A cam for his turbo build. I think he'd be better off spending the extra money on a turbo specific cam or if he's trying to save money he should get a JDM d15 vtec cam as it would be the best stock d series cam and not have the overlap of a N/A cam.

non-VTEC

i have seen lots of good dyno results with cams that were designed for N/A in a boost application. usually a stage 1 or 2 cam works well with the right tuning even if it's a SOHC.

zman

i've also seen dynos (on honda-tech or where ever) where n/a cams work quite well in boost applications, but its usually high boost, larger displacement setups. I've seen people use skunk2 Pro series cams in their boosted cars and it worked very well.

ol dusty

so then if your doing a really high boost high horse power build then it'l work, but for a smaller boosted app then it would be counter productive? If you were to shell out big money for a big numbers set up wouldn't it be worth it to just get the right cam rather than make the wrong one work?

zman

people make impressive numbers with stock cams. I tuned a d16z6 this summer with vitara pistons/eagle rods and pretty much stock everything else and a nice turbo kit that made 400whp, stock head, stock intake manifold/throttle body and stock sleeves. Longevity might be an issue IMO, but the power was made with the OEM parts.

People are making 500-600whp on stock b16/gsr/ITR cams. If you're boostin it concentrate on the bottom end and turbo kit, better valvetrain isn't a bad idea, but don't go crazy if you're using stock cam(s).

ol dusty

I'm workin on a turbo build d and I have the N/A cam from an other engine build gone wrong. I still have the crower springs and retainers also, and I want to build the bottom also but I'm not plannin on a 400 hp engine like fr0z3n's I want about 225 - 250 tops. Actually most of the parts I have so far came from fr0z3en's car. Z, I'm sure you also read the thread on another site...who's name I don't dare mention on here. I don't plan on using the cam for my build but I want to sell it for money to help pay for the other parts I'll need for the build, ie better intercooler, oil lines, tunning etc. the guy who's lookin at buying the cam is also a turbo d and wants to know if it would work for his build.

FuzzyLS BRO

^if you only want 225-250hp then you can make that easily just on boost, no need for a more aggressive cam.

ol dusty

I know, the I have the cam and someone else doing the same build is interested in the cam but I don't wanna sell it to him without knowing it'll work for his app. I need the money but I don't like to screw people. if he knows what he's buying and he wants it sure sold but I just wanna be clear about it is all.