Not to mention that the BR440 is a more comparable turbo to Myear's relatively small 3071R, not the 500.

Joe "Am I even starting?" Pizzimenti

By the way, aren't you still only making as much HP as a stock turbo car?

 

I'd just like to say that the way the turbo spools on the dyno chart does not dictate how it performs on the street...Driving it for the past 2 days i've come to the conclusion that the amount of lag compared to the stock turbo is minimal, another Evo driver wouldn't be able to tell the difference unless i told him it was not the stock turbo...

 

OK...how about you both take it to the track and post your trap speeds...wouldn't that be a better indication of performance to $$ ratio?

 

Isn't 30psi on a stock motor a bit high. When I ordered my br500, I specifically asked what was the max psi I should run on the stock motor and I was told 25psi.. Just so I know for the future..

 

Az3ar,

I can read, obviously you can't, the points you made on fuel I already covered earlier for this car.

Your little turbo on 97 octane made the same as we did on the stock turbo.

When you go beat Robert Fuller on a road course or us in the 1/4 mile I will definetely take the statement I made back, until then......

David Buschur
www.buschurracing.com

 

30 psi on the stock engine with the proper tuning has worked out well with quite a few guys.

It is amazing that the stock rods can take it. The two engines I have had apart that have seen that kind of boost with the stock bottom end have shown no rod damage at all. I have seen the stock rod bolts stretch with the high rpm and high boost, this will cause the rod bearings to spin, the rod itself has held up well.

If anything I think limiting the RPM is more important than limiting the boost when talking about the stock bottom end of the car.

David Buschur
www.buschurracing.com

 

Not trying to add fuel to the fire here, but how much does a Stage 4 with a stock turbo put down on Pruvens' dyno when running 93 octane? WHere's the most bang for the buck? Sink the money into tuning using an AMS EMS with the stock turbo or invest in a BR440 or BR500 and tune using a flash?

 

I'd go EMS with a stock turbo, at least until they're putting down pump gas numbers that are at least slightly better than stock.

 

And what sort of 1/4 miles times/traps have you had with your car? With BR parts and a stock turbo I was running 12.2's @113 on 100 octane and 21psi taking it easy on the car (only had 800 miles on it). If you can do it for less, great, but till I see some timeslips a whp graph is just a pretty picture to post on some forum.

 

Dave will 25psi dropping back to 21 psi shifting @ 8000 affect the rod bolts?

 

 

Its funny that you should mention this question.

Shiv was just on the thread in the engine power train forum today alleging that the Pruven DYNO JET reads higher numbers than the Turbo Trix dyno jet - which or course anyone who knows anything about how Dyno Jets work would know s totally false. The wonderful thing about Dyno Jets is that they all read the same - the steel drums that are being turned all weight exactly the same on every Dyno Jet awd dyno.

Its super funny to me how Vishnu claims to have a "low reading" 'moon' dyno and they always have to 'estimate' REAL dyno jet numbers - meanwhile they say the Dyno Jet that I use is a 'high reading' dyno jet and they have to claclate down wards to get my REAL whp figures. Whats hilarious about all of this to me of course - as you wisely note - is that the time slips from the drag strips seem to correlate well with the dyno sheets you see from our Dyno Jet dyno.

Its one thing to make whp predictions based upon 'estimates' or 'calulations' - its another thing to run X mph at X time on the drag strip.

 

To me its insulting that a guy like Az3ar would come on here and insult and question the advice of a person like Dave Buschur who has been a pioneer of 4G63 performance for years and who is a very accomplished tuner and racer.

Az3ar's additude is all wrong and his posts who he has very limited knowledge about tuning.

 

Nobody has asked for your opinion and as we have discussed in person sereval times I would prefer if you would refrain from posting here in my forums and instead contribute your thoughts in the Vishnu tuning forums. Thanks

 

Hey guys im not involved in all this i just want to add a comment. I have the ATP kit and i will be installing it this weekened. Next weekend there is a race and i would be happy to post my numbers. By the way on the stock turbo with NO BR parts i was running 12.2@112 and i would be happy to post those if you would like. But give me a week to get to the next track day then we can see what the ATP kit can produce. And agian this is not intended agianst anybody. We have allot of great tuners tuning the evo's just some i personally dont like for there $hit talking and thinking they are top dog. Only one company can claim that right now and that is Turbo Trix! Anyway i will be posting soon!