I will be tuning on a mustang dyno.
Thanks again guys,
Sam

 

To be honest, you should worry about drivability/reliability. Not just numbers. Numbers are just a tool used for tuning.

 

Probably to reach that 400 Mustang number on straight 91 octane pump gas, you'll need either the HTA Green, or a BBK-B. If your in CA you'll also probably want it configured with the stock Mitsu compressor housing, as opposed to one of the surge ported, larger mouthed, compressor covers.

Either of the two above turbos spools up relatively well. But if you must have absolute stock like spool then you'll have to get the BB version of either. These turbos will get you up to and above 400.

Another option is one of the MAP turbos. I don't know which of the two EF-2, or EF-3 is equivalent to a BBK-B/HTA green though.

These turbos are all pretty driveable. Hell I have a JB Red and it is pretty driveable. So, either of the above turbos will outspool my Red. Curt Brown flatly states that the Green is the absolute best street stock appearing turbo. A lot of California peeps, especially in the Bay Area prefer the CBRD turbos though.

 

Sam: Why do you want to limit yourself with 91 octane fuel anyway? I know that there is E-85 in Hayward and down in Redwood City. Don't you have it available closer to you.

If you run Ethanol then you can easily reach 400 Mustang with a smaller turbo such as the BBK-Full. Just have switchable E-85/91 tunes and you are set.

 

I really have thought about the E85 route but there really is no station near my location. I am looking at 400 whp as a figure so I don't push to hard on the stock block (I am conservative). The stock frame turbos are most tempting as I really don't want to pull the turbo/manifold every two years or risk getting sent to the state ref.
Thank you guys this is all very helpful,
Sam

 

If you are worried about the integrity of the stock bottom end then you should know that turbos such as the BBK-Full and the HTA Green are great torque producers on pump gas. Torque is what pops bottom ends...not horsepower.

It is easier probably to keep the bottom end together with a bit larger turbo such as the Red or a BBK-B than with either the Green or the BBK-Full. Generally, you'll produce higher peak power numbers with a Red or a BBK-B, than you will with either a BBK-Full or a Green but less torque.

If you have a really good tuner he should be able to limit the midrange torque on either the Green or the Full though.

 

Torque is what moves the car though, not sure I understand the benefit of having a car with a high peak horsepower number and a mediocre torque number?



FWIW, Chad has told me to get the most out of the BBK-B you want to run more boost than what he recommends for the BBK-Full, which is over 30 PSI. You just can't reliably make power on 91 at that pressure, so E-85 is the only option.

 

I thought it was pretty much assumed that the only REAL dyno is a mustang dyno???


Sure... if I wanted to brag about my dyno numbers, I would find a dynojet.

 

Worthy of the Pie Name.

 

I heart my E85 + BBK Full. 385whp/339 (MD) on 91 at 25psi and 452whp/384wtq (MD) on E85 at 28.5psi. I beat the **** out of it on the track.

 

But, even out of its sweet spot at 25# the BBK-B will produce considerably more power than the BBK-Full. Well over 400 WHP is doable with the "B" at 25# but not with the Full.

That fellow in Hawaii got over 420 Dynojet(?) on 92 octane at 26 PSI. So, to achieve 400 on pump there is no need to boost over 30# with the "B". 400 is doable with the "B" on 91 at 25#. Not easily doable with the Full.

I think that Bryan at GST got about 403 MD out of a stockblock Full though didn't he? So, I guess that it is not impossible. I am not downplaying the Full. It is probably the best bolton pumpgas turbo. Just look at what Evolutionary has done on his race car with a Full and a stock block.

 

The EF2 has done 400+ Dynojet with 93 octane, you would have to go EF3 for 400whp on a Mustang and even that might be tough on 91 octane. Assuming 18% correction to get to DJ numbers we're talking about 470+whp, wouldn't that be tough for any of the turbos mentioned on 91 octane?

 

Very cool.

Here's what Chad had to say about it a while back (sent via email):

 

Thank you guys, you all have given me a wealth of info!
I already have an 3.5" intercooler, nisei uicp/licp, fuelpump, buschur intake and full exhaust no cat.
My plan is:
BBK Full - Ported Exhaust manifold - Some brand O2 housing - valve springs - 272 Kelford cams - APR head studs - Some brand 1200cc injectors - I will dual tune for E85and 91. When I move, I will make sure E85 is nearby

Sam

 

Looks like a good set-up, I can't comment on the MAP turbos because they came out after I had already made my purchase. There are quite a few of them on the boards though, so you may want to look into them a bit further.

As far as O2 I went with a Titek V2 stainless, but Chad prefers the latest from Invidia.