Prostar 190 LT-1 vs Standard TBI

[The8Ball]

There is little actual difference in performance, between the 2. Owner's manual: top speed for LT1 is 47 mph, 45 mph for the "other" engine. Isn't the "other" engine the Predator? The RTP? Retire the Predator? The engine that everybody makes fun of on here?

Get the Corvette engine.

[1redTA]

Originally Posted by JDK

Would you happen to have the Edlebrock pn?

I believe edelbrock makes a TBI manifold no machining necessary

[1redTA]

http://m.summitracing.com/parts/EDL-3704

link to summit website for the TBI manifold sorry for the double post I am on my phone

[brat]

Everything I've ever seen on the LT1's says they were VERY CONSERVATIVELY rated. As in, they make alot more HP than advertised. But that may or may not be accurate.

[bret]

I think that bore is 46mm, where as the bore needed for a 454 unit is 50mm, thus machining of the standard 350 TBI unit. I'll see if I can contact a guy I know to confirm that.

[etduc]

You can go with a Holley projection intake. (52mm) I have a new one for sale. (non-Vortec iron head version) Shameless plug.

Indmar changes the adaptor plate, to use the 50mm TBI, on a stock manifold. (Which looks like a carburator manifold, with an adaptor plate. Not a 100% sure.)

[dvdedski]

Originally Posted by 80starsmn

Hello, I am looking for your inputs on my buying decision. I am looking for a mid 90's Prostar 190 as a replacement for our 80' Stars and Stripes. While I know the upgrade in hull will be awesome alone, I am torn on the choice between a model with the LT-1 or one with the standard 275hp TBI 1:1.5 powerslot trans. I have been told there was an option on this boat for a LT-1 with powerslot 1:1.5 trans, does anyone know how common this is to find in the used boat arena? I am a 44yr old 175lb diehard slalom and barefooter with three boys who are wakeboarders, so our boat must meet all of our needs. The powerslot is in our 80 Stars and Stripes and I want the power it produces in our next boat. I am intoxicated with the cool factor of having the LT-1 but ARE the drawbacks too great for our needs. I understand most LT-1 boats are only 1:1 trans ratios which give great top speed but less low speed qualities. An LT-1 with a 1:1.5 ratio (if available) would solve that problem but then do have cooling issues, premium fuel oct. requirements, increased repair costs, finnicky running engine concerns? I keep telling my self I need to sober up and get over the "cool" factor of the LT-1 and just find us a nice clean 190 with the standard 1:1.5 and enjoy the new wake and ride. All opinions welcome.

I have a 1994 Prostar 190 LT1 power slot for sale if interested. Approx 500hrs stereo heater. Also I am the original ower. Plenty of power for footing. Have pulled triple footers long line.
Have new 2011 Prostar197TT on the way. Asking 14k OBO.