Evo vs. Viper

[TatII]

Originally Posted by HondaChili

TAT, you showed me way too many videos. I can't remmeber them all. All I know is that the AMS evo before they hit the 1000 mark had a 35 R in it. And yes with those upgrades Evos should be reeling in vipers.


Racer D12 - Thanks very much. Trust me, the picture hides away the imperfections.

hahah not as much of the random shit you show me from youtube or video.google.

[Steiner]

Thanks 209. Greg sent me a PM aleady. Unfotunately I'm tied up both Saturday and Sunday. Good luck though. Post some pics and video if you can!

[nissanfanatic]

The 35R should not ever be taken to 35psi. That is way past charted impeller speeds and efficiency regions.

I have seen the 35R make as much as 633whp. I personally would go past 27psi if I were trying for 600whp, just from looking at the map.

The GT4202 on the other hand could do 35psi easily. In fact, that is optimal boost level for maximum power. With supporting VE mods, that is where it will have the potential to make 900whp, maybe a tad over. The 94mm, it should also stay at around 27psi to make maximum power.

Of course, there is that exceptional dyno that shows each turbo making more than what I posted.. I like to not max my turbos, and stay on the efficiency islands.

[HondaChili]

Originally Posted by nissanfanatic

The 35R should not ever be taken to 35psi. That is way past charted impeller speeds and efficiency regions.

I have seen the 35R make as much as 633whp. I personally would go past 27psi if I were trying for 600whp, just from looking at the map.

Thats what I said.

[CivRacer95]

I thought you were going with some HKS cams steiner? Last time I remember talking with you, you were looking into a 264/272 set up. So, decide to drop that and opt for something else?

[nissanfanatic]

Originally Posted by HondaChili

Thats what I said.

I simply said I wouldn't exceed 27psi. If I made 620whp at 27psi, so be it. I'm always down for efficiency.. The Evo heads may just let that happen as well. Esp with that fast-burn technology incorporated into the combustion chamber design. They can pull timing WAY back.. So high IATs aren't such a problem. But then again, burning magnesium in the combustion chamber isn't enough to initiate a flame front with C16..hehe And VP import is even better..

[Steiner]

I've recently been reading about some of these 42R's pumping out more than 50psi for 1000whp on a 4G63 but it seems like most are running between 35psi and 40psi depending on the supporting mods. What are the limits of the efficiency range on that thing?

Originally Posted by CivRacer95

I thought you were going with some HKS cams steiner? Last time I remember talking with you, you were looking into a 264/272 set up. So, decide to drop that and opt for something else?

I had those installed, along with some cam gears, a few months back. Next to the 100 octane tune, that's still probably my favorite mod. It really opened up the top end and gave the whole car a whole different feel on the freeway. Here's the full list of mods on the car...

Tanabe 70mm downpipe, RRE Rally Cat, RS*R ExMag exhaust, K&N filter, JDM MR BOV, Hallman MBC, HKS 264in/272ex cams, Acme cam gears, Nisei lower intercooler pipe, OEM 16G IX turbo, WORKS 30% STS, Kartboy shifter base and underhood bushings, Kartboy shift knob & Hotchkis 24mm rear sway bar and various tunes by Andy at Speed Element.

A set of KW Variant 3 coilovers are sitting in my kitchen right now slowly destroying my marriage but they're going in on the 2nd - along with Tein camber plates. Mods in the pipeline are JAM no-tick lifters, GM 3 port boost solenoid, EvoGreen turbo and an AMS intercooler.

[nissanfanatic]

People do it and I will not disagree with it making power. But given the compressor maps, that is a very substantial overspeed. NTM, a lot of those guys are running extremely high octane fuel like VP import, so the IAT increases caused by traveling that far out of the efficiency islands can be negated by the octane rating and quick-burn technology combustion chambers allowing low timing advance. Pressure will increase flow, no doubt about that. But I would rather not tax such a pricey piece of equipment that is doing something it was not designed to do.

35psi is exactly what you should run to near 1000whp. Given it isn't charted to make 1000whp, that would be the "best of the worst" area to be. You would need crazy good VE to even near 1000whp at 35psi even on a 2.3L stroked 4G63... Thank Mitsubishi for an already outstanding head design.

For 1000whp and above, the GT4788-R is probably your next stop. I would buy this turbo if I planned on making over 800whp. But thats me. The GT45R will touch 1000whp if you think you are gonna stop right when you make 1000whp. Who stops?

All of these turbos come with the same AR options for turbine side, so there is really no reason to buy one over the other for spool unless you think that inertia related boost threshold increase of like... nothing, matters..

[98BlackTransAm]

Originally Posted by Steiner

But I obliged my buddy and eventually pulled next to the Viper and, to my suprise, the guy driving was probably in his mid 30's. So instantly I'm jealous and I hate this guy for having a nicer car than me so I tell my buddy to get his attention.

i've seen '94 vipers on autotrader dip into the $25k's, and they can easily be had in good condition in the $30's.

Originally Posted by 2000LS1Z28

Hmm, pretty impressive. The 94 Vipers weren't all that badass. The 96+ ones you gotta watch out for. I know you are on a pessimistic dyno, but the 96+ versions actually had alot more then 450hp. Alot of them have dynoed around 390+whp on a dynojet, so it's obviously over the 450 flywheel horsepower quoted by the manufacturer.

i thought 97 was when they really beefed them up.

[Steiner]

Originally Posted by 209 SRT

kinda off topic but hey stiener since your in our area you should go to kingdon race way this weekend...

How did you and Greg do last weekend?

[Steiner]

Just wanted to bump this with some pics of the car on the new KW3 coilovers. Man what a difference! I'm still dialing everything in (it takes a while with the 2 way adjustable setups I'm told) but at 75% it performs like the car did at 95% on the stock suspension...

[pimp349]

rusted rotors on such a beauty?

[vectorspecialist]

he probably just washed the car, and didnt use the brakes yet, it's wat happens wen metal and water mix

[Steiner]

{runs out to look at car}

Yeah they look good now. I think vectorspecialist nailed it. I had finished washing the car 30 seconds before I snapped that pic.

[vectorspecialist]

yea had the same problem with a pic of my stealth, just started it went into reverse, down the driveway, hit the brake, and went back up, all good now