i bought some skunk2 stage 1 cams for my turbo'd gsr. they are going to be put in my fully built b18c1 and I'm planning on running 10-15 psi and maybe 20 at the track. I wanted to know if these cams were going to hurt performance or help it. skunk2 has told me it would hurt performance cause there is too much overlap. what do you think?

 

I didn't want to buy stage 2 or higher cause I didn't want to change the idle. I couldn't find any turbo cams, so I just decided to get the stage 1 thinking I would be okay.

 

overlap is no good at all when boosted...th more psi the worst it is


if they said is not good, and said it had overlap, just DONT do it

 

I know this is off subject, but why don't you sell me your stock cams.

 

I'm running Skunk2 Stage 1 cams on my turbo B16.

[SARCASM]There is SOOOOO MUCH valve overlap, that the SC61 doesn't spool up till 8000 RPM's, then I shift at 8500[/SARCASM]

It runs great, even without cam gears. It's not like they're toda VTEC killers or anything, I've been around a lot of turbo V8's being built and seen a lot of the cams they're using, and lots of them have some overlap in them. I don't think you have anything to worry about, and should provide more power over stock.

 

thanks, well I am going to sell these and get some turbo skunk2 cams. I am going to keep the GSR cams for back up though. I'm currently negotiating with skunk2 to see if they will exchange these for the turbo ones. just gotta pay the restocking fee and the shipping. I bought the cams for 520 though so no big harm done.

 

SOME overlap does become necessary at the higher revs, even with FI. After all, technically, naturally aspirated is FI too, just only 'boosting' 14.7 psi

Obviously the entire game is changed when you, say, double that and boost a bar-- but the physics of the engine flow and the reason the overlap was there in the first place doesn't change, you just don't need as much of it. It's definatley likely that the stage 1 cams will make power, especially at the top end where most of our torque curves are dying off. I'd go with them with 100% confidence, especially since stage 1's aren't too much diff from stock.

Matt

 

yeah well some overlap is needed with any type of setup, but the NA cams have more overlap than the turbo cams. The turbo cams are specially designed for that type of setup and according to skunk2, their turbo cams provide max power up to 20psi. seeing as how that is the most that I am probably going to be boosting, I see no problem with that. the stage 1 cams, after thinking about it would probably help out a little, just like B16coupe said it helped him, but I don't want to take the chance and have to spend time going back and fixing something that could have been avoided in the first place. I want to do everything the right way with this motor that I am getting built and I don't want any fowl ups. so I guess we'll see what happens.

in any case.....skunk2 stage 1 cams are being sold for 520+shipping which is 20 bucks anywhere so 540 shipped, brand new, still in package...unless skunk2 will exchange them for me, but spread the word for me please. thanks a lot guys.

 

stage 1's will probably increase hp a little. Type R cams make more boosted power over b16 cams (in same motor). True that too much overlap in boost is bad, but stage 1's are probably ok

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">


if they said is not good, and said it had overlap, just DONT do it</TD></TR></TABLE>

 

yeah, I'm gonna go with what skunk2 told me. I think that the stage 1's would help me some too, but all in all, I would rather not take the chance and just go ahead and go with the turbo cams.

oh and from what I've been hearing from a lot of people is that the gsr cams are pretty good for boost. better than the itr and ctr cams, even though those may be stronger, the gsr cams should be better for boost. but if anything, depending on how much boost you are trying to push, I would upgrade the cams, either way, high boost or low boost, you are going to get some good numbers posted on the board.

 

when talking turbo, stock cams will be just fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94dxt &raquo;</TD></TR><TR><TD CLASS="quote">when talking turbo, stock cams will be just fine</TD></TR></TABLE>

 

I also am in full agreement with stock cams for boost.

Matt

 

on a stock h22 with a greddy turbo kit.....i have seen a 30 whp gain by REMOVING skunk2 stage 1's and going back to the factory cams. no other changes at all. same boost level etc.

 

yeah, i could probably see that. like I stated originally, skunk2 said that the NA cams they make are no good for turbo. 30 HP is a lot to waste. that's why I am going to get some turbo cams. too much overlap, the H-series and the B-series might react differently to the overlap that is present, but still when pushing as much boost as I plan to, it'll probably be more beneficial for me to get the turbo cams or stay stock, I don't want to stay stock cause I'm afraid the cams might snap or something like that

 

Personally I think you are way off on thinking the stock cams will snap. The skunk2's are probably more likely to snap first. Not really anything that beats OEM when it comes to quality...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tommy1 &raquo;</TD></TR><TR><TD CLASS="quote">yeah, i could probably see that. like I stated originally, skunk2 said that the NA cams they make are no good for turbo. 30 HP is a lot to waste. that's why I am going to get some turbo cams. too much overlap, the H-series and the B-series might react differently to the overlap that is present, but still when pushing as much boost as I plan to, it'll probably be more beneficial for me to get the turbo cams or stay stock, I don't want to stay stock cause I'm afraid the cams might snap or something like that</TD></TR></TABLE>

Dont' waste your money on turbo cams...just run gsr's.

 

yeah I might do that, I thinking about it. but the OEM parts might not be up to the power that I plan on making. I mean, I've heard of people pushing 20psi and stuff like that with stock cams but I also have seen b20/VTEC motors snapping crower shafts. so I guess me going with the skunk2 turbo cams is a preference since I am going to get the full skunk2 valvetrain and IM

 

um quite a few hotrod cars run GSR cams....go ahead spend $600 on worthless "turbo" cams...its not my money.