Sideways7

iTrader: (7)

I was under the impression that VDI helps you get better torque throughout the rev range, which is a good thing in a street driven car.

ddub

All VDI does is vary the intake runner length depending on load/rpm for a smoother power band. It is tuned for STOCK PORT, after you port the motor who knows if vdi is helping or not, and maybe it's helping in one spot but hurting in another!

But that's besides the point, all I said was that it is NOT necessary. Once again, the motor that Kahren built and tuned had TII intake manifolds (was going to be a turbo'd n/a project) and hit 195rwhp BEFORE redline because it was leaning out too much. So vdi is not necessary.

Sideways7

iTrader: (7)

Did it have full turbo intakes, or was it still a 6-port inside?

ddub

TII manifolds n/a block, so 6port runners. The TII manifolds were port matched to the n/a block.

ddub

This was all explained in my first post in this thread also, that seems to have been missed!

Here, for the people that didn't read it.

robtechfabrications

i was planning on a tII swap...saving up for it...then my coolant seal went os while it's gettin rebuilt i figure i'll get her streetported...and since it'll be a new motor i might as well make a damn good NA to hold me over for a lot longer before the turbo...you dont need more than 200hp to drift, it just makes it easier.

Sideways7

iTrader: (7)

Sorry, I had forgotten you posted it earlier. Now I just have to figure out how to port match the turbo manifolds and see if its worth the work.

matts86fc3s

put a 293759283749263984729374027830487 shot of NOS on it

ddub

It kind of sucks.

I am not necessarily saying the TII manifolds are better, my point was just that VDI isn't "necessary."

SonicRaT

iTrader: (6)

Has anybody posted a dyno yet of a N/A car over 200? I've seen lots of close and should've, but I've not yet seen a did (except for a pport and a huge bridgey)

Sideways7

iTrader: (7)

Yeah, I figured that out once I read all of kahren's thread. For one thing, its like running with the aux sleeves removed. I think I'm just gonna stick with s5 upper/s4 lower and s5 rotating assembly. My ultimate goal is 200, but I will be more than happy with 180.

ddub

Not that I've seen, but Kahren's still was 195 at 7k rpm with 8k rpm redline and ~8500 rev limiter, plus it was still on its way up.

Granted it still doesn't "prove" anything, but I think you can assume it would've kept going since it wasn't dropping off at all.

Sideways7

iTrader: (7)

What did kahren's engine have in the way of exhaust porting? I have't seen that anywhere.

ddub

His style/design of exhaust port, stage 1. All of his porting is his design from his experimentation and experience.

Sideways7

iTrader: (7)

I figured as much, just hadn't seen it written down.

Jager

iTrader: (10)

Er, you'd want scavanging to make 200HP with a streetport.

NZConvertible

While I'm not calling Kahren's results into question, when one person nearly does it, that doesn't mean anybody can throw an S-AFC on a streetport and expect to hit 200rwhp, which is basically what you just said. In fact it's very unlikely. The combination I posted was not only long-proven (probably hundreds of cars over a couple of decades), it would also considerably exceed the target power rather than not quite making it. 250fwhp (say 210-215rwhp) would be more realistic assuming a quality job was done on porting, engine assembly, exhaust and tuning. And when I say quality I don't necessarily mean professional, just not a hack job.

Not that I'd ever advocate doing it, I'm just pointing out that exceeding 200fwhp is easy with a carb'd BP. Reaching 200fwhp with a streetport, OEM manifolds and stock ECU is not.

ddub

That's understandable, but I did say a few times that a "competent tuner" or "someone that knows how to tune" is needed. I also stated that all this work needs to be properly done.

I just find it a much more streetable route to take and shouldn't necessarily be tossed away quickly.

lost01388

how bout just getting a bridge port with intake and exhaust .. everyone talks about being stretable wouldnt i just be able to bridge it and put a presilencer and cat and be alright? think i would be around 180 hp with just those mods correct? sry i dont know to much about all the porting and
hp gains and wut not

Digi7ech

iTrader: (1)

That suppose to be a jab at me or a genuine question?

180hp and 182tq @ the rearwheels at around 8-9psi prior to some recent mods.

I am running very stock stuff just with upgrading reliability parts.
rebuilt S4 motor w/ S5 manifolds and turbo.

I daily drive this car 80 miles a day so I went with reliable over trying for hp.

I know 720's and an rtek would hit 200rwhp easily with say 12-14psi.

Jager

iTrader: (10)

You have a nice car, but that was a jab.

ddub

You didn't mention management, so are you saying you're going to use the stock ecu? Bridgeports and stock ECU don't mix well. However if you're going with an auxilary bridgeport only and keeping the sleeves functional, the stock ecu would work OK, but you'd be better off going carb or getting a standalone, cheap route would be an MSnS (megasquirt n' spark).

Digi7ech

iTrader: (1)

So pretty much you said that to try and undermine my statements which ARE correct. So stop trying to ***** your posts up with useless crap.
My personal preference/car has nothing to do with the questions in this thread.

I said Turbo's are over all better for a HP goal........Name some 500hp NA 13b's........
I said Turbo's are easily modfied..... True. You don't have to crack open the block and do porting to hit 200.

I could go spend probably around $160 right now and get some injectors and a $20 rtek upgrade and prove this.

So....

Lucky13

I AGREE ... anyone that knows anything about drifting knows that turbo's cant drift ... ya, well except the fd, t2, all the different silvias, some skylines, evo, subaru's and well any decent turbo car.

how come it seems like the people that are into drifting have a lower iq?

there are turbos that will pretty much have no lag incase you really didnt know.

ddub

Keep it friendly people. Everyone has their own opinion on turbo and n/a, so lets just leave it at that.