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98' GSX Expectations?

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Omega_Fatality

Probationary Member
4
0
Jan 26, 2016
Ronkonkoma, New_York
Hey everyone, I have a 1998 Eclipse GSX with a 6 bolt head/bottom that's being built very heavily, I can say that not a single component in my engine is stock or OEM, Everything is aftermarket. I'm trying to figure out what sort of expectations i should be expecting for my build. I'm hoping for 700HP but I'm not sure if i can make that. Below is a list of all the mods i have on the car, I might have missed something but i'm just trying to see where all this will put me at. I will also be running E85 as well

  • BC Springs and Retainers

  • BC 280/284 Cams

  • Fidanza Cam Gears

  • VRSF Intercooler

  • 400LPHFuel Pump

  • DSMLINK V3

  • ACT XXtreme Full face clutch

  • ACT StreetLite Flywheel

  • Injectors 1800cc LowZ FIC

  • Greddy Type-RS BOV

  • Brian Crower Valves In/Ex

  • Magnus 1000HP Fuel Rail

  • FP3065 Turbo

  • XP Bearings

  • Eagle 150mm Rods

  • Manley 8:5:1 Pistons

  • OEM 6 Bolt Block/Crank
 
Hey everyone, I have a 1998 Eclipse GSX with a 6 bolt head/bottom that's being built very heavily, I can say that not a single component in my engine is stock or OEM, Everything is aftermarket. I'm trying to figure out what sort of expectations i should be expecting for my build. I'm hoping for 700HP but I'm not sure if i can make that. Below is a list of all the mods i have on the car, I might have missed something but i'm just trying to see where all this will put me at. I will also be running E85 as well

  • BC Springs and Retainers

  • BC 280/284 Cams

  • Fidanza Cam Gears

  • VRSF Intercooler

  • 400LPHFuel Pump

  • DSMLINK V3

  • ACT XXtreme Full face clutch

  • ACT StreetLite Flywheel

  • Injectors 1800cc LowZ FIC

  • Greddy Type-RS BOV

  • Brian Crower Valves In/Ex

  • Magnus 1000HP Fuel Rail

  • FP3065 Turbo

  • XP Bearings

  • Eagle 150mm Rods

  • Manley 8:5:1 Pistons

  • OEM 6 Bolt Block/Crank
700? I dont think a 3065 flows that much
 
Glad to see a new DSMer undertaking a nice build. We wish we had asked someone about our first two builds, like you are doing, before completing them. But we didn't ask, and had to learn the hard ($$$$) way. Here are some things for you to think about between now, and the dyno pulls:

You should be determining your horsepower goal BEFORE the build, not seeing what it is capable of afterward, unless you like disappointing surprises.

You are using a 6-bolt block and crank. More horsepower requires a stronger clutch to keep from slipping. High clutch pressure will side-load the crankshaft bearings. You should be aware of the practical operating pressure on the crankshaft bearings, and not tune your engine to exceed the need for that limit. If this car is going to be a weekend warrior, then, with high side load, it could last a while. If this is your daily, you better like engine rebuilding.

What an engine is built for, and what an engine is tuned for, can be two different numbers. A good tuner will be able to help you make that grocery cart full of parts into a powerful, smooth running, engine, with some safety buffer built in. On our most recent rebuilds, we talked to the tuner, and the machinist, BEFORE buying the parts, due to them knowing what parts were the best choice.

And, there are other factors, such as fuel line size, turbo oiling, oil pressure, and engine cooling, to name a few, that should be planned out BEFORE the build. The answers are all here, on this forum, for you to learn from others mistakes, and now, their wisdom.

To answer your question, you should see 350 to maybe 450hp with a good tune. If you want more than that, you will have to design your build to incorporate more specifics about other factors.
 
This will for sure be a weekend warrior as i have another car i drive daily so i'm not getting pummeled with horrible gas mileage. So you're saying I'll only be looking at around 450 max? I was expecting much more than that considering how much i've already invested in to this build
 
Lots of missing information..... what type of fuel, how are you metering air (maf/speed density), what are your intended goals for the car? 700hp is a lot more than people think it is. At that power level, you have to start paying attention to overall weight of the blvehicle to help take the strain off the drivetrain to help with keeping the drivetrain alive. Ask me how i know.
 
Lots of missing information..... what type of fuel, how are you metering air (maf/speed density), what are your intended goals for the car? 700hp is a lot more than people think it is. At that power level, you have to start paying attention to overall weight of the blvehicle to help take the strain off the drivetrain to help with keeping the drivetrain alive. Ask me how i know.
This will be running on E85 and I'll be using speed density to measure air. As far as goals, it'll mainly be a fun weekend car and spirited driving
 
You have lots more to do than make a list of parts. With any platform you need to know weak spots and what systems will be affected as you change things. From just a hp perspective at a bare minimum you need to know how much mass of air it takes to maintain whatever air fuel ratio you want at your hp goal. If the turbo doesnt support this no matter what you do you wont get there. Engine is just a big pump. You have to get air in and out.
 
Hey everyone, I have a 1998 Eclipse GSX with a 6 bolt head/bottom that's being built very heavily, I can say that not a single component in my engine is stock or OEM, Everything is aftermarket. I'm trying to figure out what sort of expectations i should be expecting for my build. I'm hoping for 700HP but I'm not sure if i can make that. Below is a list of all the mods i have on the car, I might have missed something but i'm just trying to see where all this will put me at. I will also be running E85 as well

  • BC Springs and Retainers

  • BC 280/284 Cams

  • Fidanza Cam Gears

  • VRSF Intercooler

  • 400LPHFuel Pump

  • DSMLINK V3

  • ACT XXtreme Full face clutch

  • ACT StreetLite Flywheel

  • Injectors 1800cc LowZ FIC

  • Greddy Type-RS BOV

  • Brian Crower Valves In/Ex

  • Magnus 1000HP Fuel Rail

  • FP3065 Turbo

  • XP Bearings

  • Eagle 150mm Rods

  • Manley 8:5:1 Pistons

  • OEM 6 Bolt Block/Crank
A good combination of internal engine parts can help meet your goals Manley makes great internals. You should look into a high compression ratio and a E85 piston OEM crank is fine. I’m not a fan of EAGLE products
Look at Manley CP rods or better a better clutch a bigger turbo 6266 or equal a double pumper fuel pump and all supporting mods. just my 2 cents
GOOD LUCK
 
Never get there with a 3065. It's an old cast 35R compressor wheel on a 60/55mm 30R turbine; if the stars align it's a 65 lb/min compressor so 650 at the crank and probably 570-580ish at the wheels is about as good as it's going to get on a typical build/tune.
 
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