pwrtrip75

iTrader: (8)

I had this MPGT45 on a stock LQ4 and was pretty happy the way it ran. Spool was instantly and made about 700whp @ 15psi

I had an engine noise so Im ripping it all apart and building a forged 10:1 370ci for E-85. I'd like to get about 800-850whp out of it.

This is just my street car so I'd like it to spool instantly. I got a good deal on this PT76GTSH and I was wondering since the GT45 has a 80mm turbine side and a 1.05 a/r and spooled instantly, and this PT76 has a 76mm turbine side and a .96 is it going to choke it at all being 370ci? I was going to build a 325ci but found another deal on some 370 parts.

Anyone else run a single PT76? Results?

Thanks.

Nitroused383

iTrader: (10)

The PT76GTS has a 82mm turbine inducer and 75mm exducer. It will make more power and spool quicker than the MPS turbo, its a great unit.

LS1NOVA

iTrader: (12)

Wow, 700 with a 69mm compressor, nice job.

Im going to have Forced Inductions upgrade mine (MP GT45) to a 76mm Garrett compressor wheel. Old school tech but Im hoping it works good and will get me to 750. 600 now.

pwrtrip75

iTrader: (8)

MP rates them at like 1000hp. My old 5.3 put down 640whp (15psi, gasoline) with it though a TCI streetfighter converter (horrible) . I would think 750 would be doable, but about at its limits. Other forums say 800whp is doable.

The stock LQ4 (ls6 cam) now is on E-85 and 25 degrees of timing. Im just estimating the 700whp comparing it to my 5.3 w/ 640whp. There is quite a difference.

pwrtrip75

iTrader: (8)

interesting.. thanks. Precisions website is out of date and none of the stats were available.

DrTurbo

iTrader: (3)

MP rates it at 1000hp, but it comes no where near that with the small comp wheel pictured. The 76 will out spool it and out power it.

LS1NOVA

iTrader: (12)

How about the GT45 with a 76 wheel?

My2kz28

iTrader: (1)

Whats it cost to get this upgrade done? I too am curious.

LS1NOVA

iTrader: (12)

FI quoted me $350 a couple months ago.

My2kz28

iTrader: (1)

hmm interesting...did they say what the turn around time is? I may go this route because i dont know if ill be able to make 650 rwhp with this thing at 5600 feet above sea level..i dont know what do you think

LS1NOVA

iTrader: (12)

Couple weeks. I dont think you will make 650 at that elev. unless you have a very efficient setup.