probably. but just giving you a heads up. this sounds like one of those things thats easy to dismiss up front when you're buying the product but come back to bite you in the butt later.

you'd have to find

1) someone who already has a turbo kit

2) that wants to upgrade or downgrade to the 3071

3) that can find someone who will buy their turbo

4) and has a kit that has a downpipe that will fit

5) and an intake pipe that will fit

-- number 3 almost hurts the brain. its infinately regressive unless you are lucky enough to find someone to swap with you.

 

The EVO head already flows well enough to give very solid Ve potential, and I have yet to see anything that proves porting the EVO head is beneficial by a significant margin in a *real world* setting. The better the initial Ve, the less there is to be gained by porting the head.

In this case, my guess is the most significant factor here is the HKS 280 cam set as opposed to a ported head. In other words, if I had to choose between two maps, one from a car with 272s and a ported head vs. one from a car with 280s and a stock head, I'd be willing to hedge a bet that the map from the car with the 280s will be a closer fit, simply because what I've seen indicates the cams have a far greater effect on dynamics that potential affect fuel mixture than ported heads.

Just my opinion.

 

I agree to an extent if you are staying with a stock turbo. Shiv stated that I lost bottom end by porting my head on the stock turbo (at least on pump gas). Note that I have a 10.5 backhousing. Unless you are going to a larger turbo my personal recommendation is that porting is unecessary. Actually for that matter so are valvesprings due to where in the rev range a stockish turbo makes power.

 

If low speed response was lost after installing a ported head, it is because port velocity was reduced as a result.

Porting the head affects volumetric efficiency (for better or worse). Ve is relatively unchanged regardless whether a smaller or larger turbo is used because the difference between the two is the pressure and temperature of the air charge, whereas the volume of the air charge remains relatively unchanged.

 

Thanks for the input guys, I really appreciate it. so 280 cams wont need stiffer springs? (valve springs). you are saying just 280 cams is better overall with stock turbo?

 

The HKS 280 cams are no harder on the stock springs than the other HKS cam sets, so no, you don't need stiffer springs.

The 280 cams deliver more power potential than the others, but as always, you sacrifice something (idle quality and low speed power) to gain something else.

 

Thanks Ted, one more question, what is the HP gain going from 272's to 280's, just that swap. any one know?

 

There is no definitely answer to that question because what gains can be made depend on supporting mods and competent tuning, and I would not even consider the HKS 280s without a sufficient dose of either.

 

There are 2 Mustang AWD dynos in the area, Performance Autowerks in Naperville and Fall-line Motorsports in Northbrook.

Also, 780 cc injectors seem to be a bit of overkill for just a 3071R. Wouldn't 660's match up better?

 

Nice list of Mods. Ted, how did you get the Alky to work with the XEDE? what HP # do you have? are you going to stay with the stock turbo?

 

The meth injection works especially well with the Xede because since the Xede contains two maps that can be switched on the fly, it allows you to continue running with the 93 oct map should you deplete the methano reservoir. With other systems, if you run out of methanol, you have to keep your foot out of it until you get a refill.

My cam timing is not set to give max hp, but rather best midrange torque. On a Dyno Dynamics dyno, this is 348whp and 340ft lbs, which works out to something like 400whp and 390ft lbs on a Dynojet. This is attained running a fairly reasonable 25psi at the torque peak, and tapering to only 20psi at peak hp.

I am using the 16G with larger hotside and Ti wheel at the present, but I'm upgrading to a GT35R soon (already have it).

 

sweet, you can always sell me your turbo (16G), does Vishnu sell the Alky kits yet? where did you get yours from? Thanks for the help Ted!

 

Somone else has already claimed dibs on my turbo, so we'll see what happens with that.

I do not believe Vishnu is selling the methanol kits yet. Mine is a kit from SMC Enterprises, which you can get either directly or through Buschur (no price difference).

 

Yeah, 680s would match up better. But after Eric @ AMS and I talked it over, I decided to go with the 780s because I plan on building up the 2.0l next and (allegedly) the 780s will have better resale value down the road. Honestly for the small difference in price, I'd rather be one size too large than to have to end up swapping them out prematurely. If I ever get to the point where I end up with a gt35r on a built 2.0, then I will up the ante to 880s.

l8r)

 

Ok,

I finally figured out the signature thing, here are my mods, how much gain with the 280's? enough to mess with? I run on the gas I was dynoed on 110 LEADED. would like to re-dyno on 109 unleaded MS 109 from VP and 280's. worth it?