stevieturbo

I see no reason to doubt it. DOnt forget....this is at 8000rpm.



Just look at how much power those little honda engines can make with some boost....

RPM's make power.

nitrorocket

iTrader: (12)

If a stock cube Ls1 will easily make 750-800 rwhp on race gas and 13-14 psi, that sounds right to me.

BAD ASS TA WS6

iTrader: (5)

Takes a lot to develop a kit of this nature... A LOT. There aren't a whole lot of people who can tune the cars for one. Even fewer that can crack into the DMEs of these cars succesfully. It takes quite a bit of time, and knowledge.

They are expensive to begin with, so that factors in as well. Everybody in the performance industry wants to tap into where the big money is. That's just the nature of business.

I would never throw money at a 325... You've got/will have a fast car soon enough. Enjoy the 325 for what it is. Although, they sure are fun with full suspension.

mahhddgtp

The extra curtain area from the valves (from having more valves - 24v, DOHC) has a lot to do with it too.. Really helps flow.

Plus it's on race gas, that's a ton of timing added

gametech

iTrader: (1)

I have some trouble believing you can double the HP (they show way more than double) of a motor with 13.5psi. The math just doesn't add up. Even if the boost was introduced with zero efficiency loss from driving the turbo, 13.5 psi is less than double atmospheric pressure which = less than double HP.

stevieturbo

Who says the car is anywhere near the power it can acheive when it leaves the factory in the first place ??

Some LS1's make low 300's, whereas others make 400, and that pretty much down to how its tuned from the factory.

A Euro spec M3 has circa 360bhp, and it revs like crazy. You cannot compare VE's of a 2 valve low revving motor, to those of a high revving 4v motor.

Just look at motorbikes. 1000cc motorbikes that make say 150-180bhp....

Boost and cubes arent the only way to make power. Why do you think F1 cars rev to around 20,000rpm. They make 750-800bhp+ from only 3.0 engines.

gametech

iTrader: (1)

I'm not comparing that motor to anything other than itsself. It would have to be horibbly tuned, with a restrictive intake and exhaust on the stock pull they show in order for the turbo kit to more than double that engine's power at 13.5psi.
edit- I just looked more closely at the dyno notes, which are not the same as the write-up above the graphs. The dyno sheet says 15psi, not 13.5. Also the turbo runs were in more favorable conditions than the stock run. Maybe not bs, but definitely a misleading write-up.

stevieturbo

Sounds like a typical emissions strangled US spec car ??

Would I be wrong ?

Lots of US spec cars are very different to their UK/Euro counterparts. Even the old M3 ( or Z3 Roadster/Coupe thing ) had only around 240bhp in the US. Here in the UK, both cars had 320bhp, different intakes, exhaust, and no doubt many other items.

LSGunZ28

iTrader: (8)

PSI is just pressure, it doesnt mean its the airflow... in a large diameter pipe the PSI may be less, but the airflow would be equal to a smaller pipe with the same flow, but the psi reading would be higher... I think.

bboyferal

iTrader: (9)

I agree 100% dude... Very true.

NYSS Guy

iTrader: (1)

I guess it's not as far from reality as I thought. I still find it hard to beleive they can push that kind of boost through a stock bottom end, especially with 11.5:1 compression. I am VERY curious to find out if they have some time slips for this setup.
It also seems pretty laggy for a front mount. full boost by 4800 rpm....I've hit full boost quicker than that with a bigger turbo mounted all the way in the back. I know I have more cubes pushing it, but it's just an observation.

In a nutshell, I guess I won't call total bs on this, but I'm still VERY skeptical.

bboyferal

iTrader: (9)

^ Remember, that high CR is probably helping it make that power I believe... What IS awe-inspiring, however, is the rotating assembly's longevity (so far) to me when considering those kinds of pressures. I have a feeling it will blow soon.

BMW techs? Any info on the factory pistons, quality, etc?

mahhddgtp

Judging by some of the responses and someone saying "Now I can't believe people said this couldn't be done!!"

I'd say not all too long.

stevieturbo

I know BMW did a recall on a lot of engines, as they had premature big end failure when the E46 M3 came out.

But generally, they are very reliable. If you build a multivalve engine, with variable valve timing etc, that can rev to 8000+rpm....

It needs to be strong in the first place. The rpm's will place more loads on the parts, than a bit of power ever will.

the only thing that would pose a real risk, is detonation.

bboyferal

iTrader: (9)

With our own pushrod technology so refined and efficient, it's a pitfall sometimes to dismiss the advantages of WELL-built DOHC motors too easily...

I must say I'm very impressed by what I already thought was a pretty bad-*** motor. It really isn't often these motors get pushed this hard on the street/local strips, especially considering the difficulty to "crack their code." I hope it lasts a while on some good fuel, but it isn't what I'd want in a car (93 octane daily driver)... Cool, nonetheless, for sure.

THE_SUPRA

FWIW the guys at HPF make good products...they used to be very stong in the supra market and make pretty soild numbers with their turbo kits for the MKIVs

chuntington101

you have to remeber that these M3 motors are very strong! somne say thay are actually stronger then the Skyline and Supra units!!!!

the US and Euro M3's differ sooo much. the US spec engines take booost much better than the Euro ones thanks to less compresion. be nice to see what the Euro ones could do with lower comp. ratio (about 9.0-1). i have heard of a Euro turner making over 1000bhp from an M3!

thanks Chris.