TurboDan

Hello, all. My first post on the forum.

Any idea how much HP or airflow a Turbonetics 60-1 hifi can support? I'm making 407rwhp/500rwtq on an LT1 at 10psi and have to use the SMC alky kit to suppress detonation. Just wondering if I'm at the limits of compressor efficiency.

I've yet to measure post-intercooler temps to see if they are high. Just thought I'd ask to see what you guys thinks. I've seen mention of T76 upgrades on older posts and wondered at what point this was necessary.

Thank you!

SS00Blue

The best I've ever seen is a guy here in Detroit. He tuned his Mustang with a 302, full exhaust and a TTi 60-1 hi-fi on a Mustang Dyno to the tune of 500 RWHP although it may have been something better than pump gas, I don't know.

Like I said, that's the best I've seen. Realistically, I think we may be talking closer to 450 on a dynojet, which is roughly 90rwhp less than the above example.

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MIGHTYMOUSE

iTrader: (59)

mine did 424rw tune limited on 93 octane 7psi.

Mekkadon

iTrader: (3)

well, I have heads/cam/forged internals. I'm making 470RWHP on a mustang dyno in my automatic/vig3200. 10PSI w/93 oct. I have the TurobTech T60-1 kit.

I say if you wanna easily make over 500RWHP get a T76.

TurboDan

With stock heads and cam I'm probably limited to less airflow an HP before getting out of the efficient operating range of the turbo. Perhaps a good port job and a new cam might be a better investment than a larger turbo. I do plan to relocate the IAT sensor to see how hot the temps are after the intercooler. That might give an idea of how efficiently the turbo is running.

Thanks for the replies!

turbolx

Nope, just regular ol' Amoco 93 octane and a good tune. In fact, that is a STOCK 60k+ mile 302 bottom end under it and it's been living fine that way for the last couple years of road racing, drag racing, and daily driving. I guess I could make more if I put it on a real engine.

The 60-1 hifi is good to a bit over 600 flywheel hp without getting too far out of the efficiency range.

MIGHTYMOUSE

iTrader: (59)

interesting comparison pic

qmp 63mm vs t-60 hifi.
http://community.webshots.com/photo/...64995007IhNxDq

http://community.webshots.com/photo/...64995021pyovwo

JRL96TA

What are the specs on your engine? Making your motor more efficient NA would help you make more power with FI. FWIW, I'm running 7lbs(60-1hifi) on my low cr 383 lt1 with stock timing, and have no detonation. MM&FF made over 750hp on a 408ci ford with a t66, and 7lbs of boost.

TurboDan

Stock motor except for forged pistons and 9.6:1 CR (with thick head gaskets). I tuned for 11.8:1 on the dyno (42.5# injectors and f-body MAF). When the weather is better I'm going to add some fuel to the PE tables in the 3,600-4,800 range where lots of torque is made. I read elsewhere on this list to tune for 11.0-11.5:1 on the dyno as it'll lean out under load, especially with a 4,000 lbs. car. Perhaps that will help.

I get high RPM miss only under high boost levels (10psi) above 5,000 rpm which is either an ignition problem (I've replaced everything and run a Crane HI-6R) or a lack of airflow or fuel. Fuel pressure never drops do I thought it might be the turbo maxing out. Kinda shooting in the dark on this one.

JRL96TA

What are you running for a cam? And what have you done with the timing? Are you retarding it under boost?

TurboDan

Stock cam and -10 degrees from the stock timing tables at 95kPa and up (0 vacuum/boost).

SS00Blue

Oh... You did it too, Greg? Small world...

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SS00Blue

Good pics. The T-60 hifi isn't even as large as the Mutt I used on my Talon. Go figure. I didn't know it was THAT tiny.

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MYTURBOT/A

What plugs are you running? Gap? Do you have any KR?

TurboDan

NGK TR-6 .030" gap. Yes I get KR sometimes when 1.) I stomp on it suddenly, 2.) shifting into third under full boogey, 3.) right around 80-90 under heavy acceleration. Weird thing is I get one knock event (usually 300 knock counts or so) that causes knock retard then it decays slowly. I really never get sustained knock retard.

MYTURBOT/A

I think your probly maxed out at what your engine will flow at your current pressure ratio. Get some good heads and intake like the lt4 conversion kit with ported heads and intake and you`ll max the turbo out at about 500-525hp.