MHS cams

2v_takeover · Jan 16, 2012

hey guys, I've been wanting to do the PI swap for quite some time now, but wondering if I should save money by not buying the PI heads or cams, and just order a pair of MHS stage 2 NPI NA cams.

Does anyone have any info on hp gain over PI cams?

Are they worth it?

I have some supporting mods, like CAI, 70 mm TB and Plenum, I will have the PI intake, have O/R H-pipe.

Any info is appreciated! Thanks.

RockstarMentality · Jan 16, 2012

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justinschmidt1 · Jan 16, 2012

2v_takeover said:
hey guys, I've been wanting to do the PI swap for quite some time now, but wondering if I should save money by not buying the PI heads or cams, and just order a pair of MHS stage 2 NPI NA cams.

Does anyone have any info on hp gain over PI cams?

Are they worth it?

I have some supporting mods, like CAI, 70 mm TB and Plenum, I will have the PI intake, have O/R H-pipe.

Any info is appreciated! Thanks.

PI parts are dirt cheap...IMO, I would say do a full PI swap, PI heads, cams, and intake that you already have.

IMO, I think your car will make more power with the PI heads and PI cams then if you put NPI cams in there.

Throw some PI cams in there and you will really see a nice gains...probably around a 300 rwhp car with the bump in compression and a nice set of PI cams

Musturd · Jan 16, 2012

X2 Justins advise is good.... Pi swapped 2v' sound sexy with the bump in compression

justinschmidt1 · Jan 16, 2012

yea, I mean no matter what you do, the biggest Bang for your buck will be a PI swap.

A full pi swap should put you around 250-260 rwhp tuned I would estimate

2v_takeover · Jan 16, 2012

Gahh, I've been so torn between things lately. the PI intake+ PI cam swap would be so much quicker and cheaper than a doing the head aswell, but I do know the compression benefit to a N/A motor. I definitely don't want to go all out with my car, but seeing like 300rwhp would def be nice.

I was just wondering if anyone on here had any experience with those MHS cams. He seems to know his stuff, so I'm hoping the cams do some of the walking for him.

MadStang · Jan 16, 2012

if you're going to be going in and taking the cams out, you're halfway there to replacing the heads anyway...might as well go for it all versus limiting yourself severely with an NPI headed car...

justinschmidt1 · Jan 16, 2012

2v_takeover said:
Gahh, I've been so torn between things lately. the PI intake+ PI cam swap would be so much quicker and cheaper than a doing the head aswell, but I do know the compression benefit to a N/A motor. I definitely don't want to go all out with my car, but seeing like 300rwhp would def be nice.

I was just wondering if anyone on here had any experience with those MHS cams. He seems to know his stuff, so I'm hoping the cams do some of the walking for him.

Are you doing the work yourself?

The PI cams are very good that he makes...im sure they are good, but I just dont know how much power they will make in a NPI head.

You really need to figure out what you want...

IMO, if your going to stay NA, just save up and do the PI intake, Pi heads with some decent aftermarket cams all at once cause its a lot of work and even at 300rwhp, most modern day muscles cars will rape you.

For the amount of money you will spend on that you could probably buy a used vortech kit. lol

Grab a used head unit and you can get the whole bracket kit and everything from superchargersonline.com....its not hard to piece together a kit for 1500 bucks these days

2v_takeover · Jan 17, 2012

Good advice thanks guys! And yes, I will be doing the work myself haha. Broke university student, I don't have a choice. If I throw those PI heads on there, will the added compression make the boost a little bit more worrisome? I don't need to go overboard by any means and I think I would be content with 300rwhp, and my 4.10's+LCA's.

justinschmidt1 · Jan 17, 2012

2v_takeover said:
Good advice thanks guys! And yes, I will be doing the work myself haha. Broke university student, I don't have a choice. If I throw those PI heads on there, will the added compression make the boost a little bit more worrisome? I don't need to go overboard by any means and I think I would be content with 300rwhp, and my 4.10's+LCA's.

What do you mean by that? You wont have any problems with the bumped compression...you will just gain like 15 hp on top of everything else. lol

MadStang · Jan 17, 2012

justinschmidt1 said:
What do you mean by that? You wont have any problems with the bumped compression...you will just gain like 15 hp on top of everything else. lol

and obviously forced to run a minimum of 91 octane...

justinschmidt1 · Jan 17, 2012

MadStang said:
and obviously forced to run a minimum of 91 octane...

I mean, I would expect anyone doing a full PI swap to get a tune and run 93 octane...but yea, you should run high octane fuel with the higher compression.

2v_takeover · Jan 22, 2012

Yes, I always have run 91 since the day I bought it even when it was $1.55 a litre.

Justin, I meant if I decided to supercharge/turbo it later on down the road if the compression is a bit high? An ongoing arguement I believe. I personally think it would be ok as I wouldn't want to go any higher than 8 psi, but I don't have the experience like most of you's do. Looking at those MHS npi cams, they have a slightly longer duration than the PI cams, but don't lift quite as high. Would that extra .25 lift be that much more in HP?

TheRainman · Jan 22, 2012

I think this is what you were asking about, NPI vs PI cams in the NPI heads, because I have been thinking about this also. MHS told me the Stage 2 NPI NA cams give about 30-40 more RWHP than PI cams on NPI heads. That would be around 45-55 over stock, with the stage 2 NPI cams because the PI cams are worth about 15hp in the NPI heads, if I can remember correctly

red95r · Jan 22, 2012

TheRainman said:
I have been thinking about this also. MHS told me the Stage 2 NPI NA cams give about 30-40 more RWHP than PI cams on NPI heads. That would be around 45-55 over stock, with the stage 2 NPI cams because the PI cams are worth about 15hp in the NPI heads, if I can remember correctly

Orly?

TheRainman · Jan 22, 2012

red95r said:
Orly?

Si Senor, straight from Nick at MHS on Jan 7 of last year, haha I had to go back in my email records.

2v_takeover · Jan 23, 2012

GAH! Thanks mate, that IS what I've been wondering. I usually don't like getting a hold of those people myself cause I don't have a very good way with words haha.

That's a pretty impressive gain btw. That's why I've been wondering if I should take that extra 10-15whp with the added PI heads or not. It's rather difficult to find them up here. Those NPI cams+PI intake with tune and 4.10's+LCA's.

Any guesses on horsepower after that? and or 1/4 mile times? I think I'd be happy with a mid 13 second car hah. No use in trying to keep up with my brothers cobra

justinschmidt1 · Jan 23, 2012

2v_takeover said:
Yes, I always have run 91 since the day I bought it even when it was $1.55 a litre.

Justin, I meant if I decided to supercharge/turbo it later on down the road if the compression is a bit high? An ongoing arguement I believe. I personally think it would be ok as I wouldn't want to go any higher than 8 psi, but I don't have the experience like most of you's do. Looking at those MHS npi cams, they have a slightly longer duration than the PI cams, but don't lift quite as high. Would that extra .25 lift be that much more in HP?

It would be fine... you would be able to make the same power on less boost which is a good thing
1/4 mile times will com.down to driving and traction. With the right tires and good driving I would thinkmid 13s would be no.problem
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