I have collected almost all the parts I need for a 600whp build but everytime I get on this forum some bad******** puts down more hp as the days go by. So I will be selling my current parts for some extreme monster parts to try to keep up. I have some questions though before I jump off the deep end.
1. What are the cons for a 100mm bore and has anyone had trouble with the aftermarket headgasket needed for this? I have heard nothing but great things about the hks headgasket but there is no 100mm bore option.
2. What is the max whp that the arias pistons can handle? I really want to get the extremes but I don't think there is a 100mm bore option.

I only plan on going into this motor once so I need to do it right the first time.
I am shooting for sleeved 100mm overbore longblock with the 20g greddys but it is research time. If I like what I hear I will be selling my arias pistons and eagle rods.

 

At some point boring the sleeves out too much will reduce their strength. Not sure where that point is though for VQ35 use, 800rwhp and above. I know 100mm bore is the max recommended for the sleeves but not sure if that the max bore for motors making 800rwhp+.

Cometic / Cosworth have head gaskets that will fit.

Sharif can have the pistons custom made to any bore.

 

an Aries piston will handle any kind of power you can throw at it, pistons don't break from hp levels, connecting rods and cranks do.

 

I have a set of Cometic gaskets here that have the 100mm bore. They couldn't get them in time so we made a custom set.

You will need bigger injectors, more fuel delivery, etc. I would recommend selling the current fuel system and purchasing the APS extreme fuel kit shown here. It will probably be cheaper in the long run.

APS Extreme Fuel System

 

Has anyone even gone over 800whp? The most i've seen was like 760hp?

 

I bet the ringlands would say otherwise.

 

Sharif has posted that running a 100m bore decreases the head gasket surface area by about 30%. Thats enough for me not to run a 100mm bore. I undersdtand that would make the VQ a 3.8L but in the end the standard bore sleeved block will sustain more boost. Look into HKS headgasket as they have o-rings unlike the Cometic.

 

At what point does the car become undrivable? Anyone here care to comment. I have ridden in a 600-700 HP Z and it was not useful at all. Its alot of money spend on just being able to have a number. I would think somewhere in the 500's is where you would see the most reward for your money and time.

 

I agree anything over 500whp is dumb/useless for the street, or anything under 4th gear rolls. I would however put 600whp to use down the track with some tire...I dont know what peoples obsession's are with "I have 800whp, I want the highest hp Z" its usually those guys who also go to the track and embaress themselves as they have the $$$ but not the knowledge/skill to get it done. Just MO

 

Highest we have made is 778rwhp on low boost. Car is definately capable of 1000 wheel just haven't pushed it as I am waiting on a new head and intake manifold to arrive. We run the 4.3L stroker with 100mm bore, ARP studs, Custom gaskets and haven't had any problems yet (fingers crossed).

 

Yeah thats exactly what was in my head. I mean when rolling into the throttle in 5th gear at moderate RPMs on the interstate sends you sideways, what fun is that. Nobody wants a car that is a chore to drive.

I am excited to see so many people building these cars tho . . . it is really is a unique situation. Taking a stock moderately expensive 2 seater sports car and taking it to a much higher level. In my eyes, it deserves more respect than most other vehicles with an easier and cheaper modification path. We clearly have to put more thought into the build given the base platform.

 

Is this the Crower stroker?

 

I think everyone has different goals when building up a car. Some want to be dyno kings, some what to build show cars, some want the fastest 1/4 car, etc, etc, etc. To each their own. I've learned from my own experiences in the power arena that a "streetable" Z/G is in the 600rwhp OR LESS area. At that, you've still got to drive it with some sense. At 400rwhp and up, these cars can get away from you, so anything more is pushing the limits.

If the goal is to have the highest HP Z in America, then just pull the VQ35 out and drop in a built VQ45 with a custom twin turbo setup (i.e. Top Secret Japan). But if you're looking to actually drive this beast on the streets, then somewhere in the 500's is probably a safer bet.

Getting back to your original post, if you're looking for 800rwhp from the VQ35, then you'll need to look at upgrading your clutch/flywheel, axles, diff, rods, and fuel sys. The Arias pistons at 8.5:1 should be ok, but a custom set of CP or JE's might hold up better. But if the fuel system gets upgraded, I'm not sure you're UTEC will do. I'm under the impression that UTEC will only handle injectors up to 650cc (anyone can correct me if I'm wrong).

In any case, good luck and keep us posted on the build progress. It's always fun to see someone pushing the limits.

 

^ with the VQ45, ... that would have to be a 4.5L V-6, ... the V-8 is at VH or VK.... TS used the VK on their V35...

 

^
Oops. Point taken. VK45. I'll go stand in my corner now.

 

No, AEBS.. They are one of the first ones to do this successfully

 

Nice words - Simply, the Z and G is a great plat for it is relatively inexpensive to build and make over 500 WHP. Not many platforms you can do this with. Admit-tingly, we have made big numbers to brag about, however, we do Road-Race and Drift our cars almost Bi-Monthly.

550-600 WHP is all I can handle on the Road-Race track and THAT IS WITH R Compound tires. That level and above is useless on the streets. It is fun, yet I find myself driving very comfortably on the street at around 550 WHP. Although, it is fun from time to time to turn it up.

Whoever wants 800+ WHP, hope you have deep pockets and hopefully you go to some Driving/Racing Classes. Not Easy to Drive...Very Dangerous...Think Safety cause that power is like Walking an 800 Lb Tiger In Heat in a Dog Pound with a 15 Ft Leash...Alot of Power...Not Easy to Keep Calm!

M

 

Just a point to note: keep in mind all of the cooling mods; oil, lsd, PS, radiator and IC. All of those will need to be able to deal with the higher heat and stress high HP will put in the engine bay.

 

I am running the 100mm Darton bore, with Arias ED pistons and the Cosworth/Cometic HG at 100mm. So far no issues, but I havent finished prepping my car for the push to a TRUE dyno dynamics 700whp+ (probably 770-800whp on a dynojet).

That said, I prefer to stick with stock'ish bore sizes, as Alberto mentioned...due to the HG seating area. You can always raise the boost to achieve more power, rather than take risks with a severe overbore. My mind might change, if I can safely make a ton of power without blowing out this gasket...stay tuned.

The Arias Extreme duty pistons are incredibly strong...stronger than anything else on the market. Even amatuer'ish tuners havent broken them yet...and that is saying something!!!

 

That brings up a good point: Has anyone in the 700+ whp actually put on some slicks, taking it to the track and trapped some decent runs?
I have yet to see any numbers at all.