Energy output of fuel has nothing to do with power output of engine..

Dann

 

I'm going to quote this and dig it up in 2 months

and this for posterity

 

Deal

Dann

 

Here are the datasheets of my conservative turned S3 potato on a Superflow dyno:




Had trouble with spark bleed on the tach lead, so no rpm info, but it is a typical 6speed trans; 80mph is approx 4k rpms).

 

I asked myself that same question, but im not going to have the money to do the turbo with new crank, rods, and pistons all at once. i wanted to just do the rebuild kit to play it safe until i do have the money (probably a year)

 

ok i see what your saying and it makes sense. but im not looking for 300 at the wheels. i clearly understand that would kill the engine really fast, as FM told me the same thing. im looking for something in the area of 260whp.(doesnt have to be exactly 260) So is this still not a feasible number? What if i tuned to the setup the kit comes with then put on a tubular manifold and bumped up to the 2860 size down the road? or are these numbers just not going to happen on stock internals?

 

 

Well if this is a dumb idea, then why? im learning. im 18 and dont have a lot of experience with turbo'd engines yet. I just want to able to safely boost my stock engine and get decent power from it with out screwing it up. As i previously said in my last post, 300 flywheel hp would be my goal. if thats not a safe goal well looks like im just gonna have to wait or come up with a different plan.

 

 

At the age of 18 I'd suggest sticking with stock HP, you stand a much better chance of seeing 19

 

You go from 300whp, to 260whp, to now 300chp. That's a huge swing, and already says you dunno wtf you're wanting. Then you say you're 18, and have little to no experience turbocharging n/a engines, and that confirms that you know next to nothing about this. Then you ask questions that are not only in the stickies, but can all be answered with a basic search or just by reading a few of the hundreds of threads we have here on power goals, etc.

See where I'm going with this?

I'll be nice to you since you seem to genuinely be looking for information:
read the faq's.
read through the build threads
pick either of the kits discussed here or put together one of your own using proven/commonly used parts on here

if 300 to the crank is all you need, that's about 225whp or so. That is realistic.

good luck

 

I asked stupid questions when I joined too. But then I read every thread in the first 10 pages of the "build thread" section (after that the pictures usually stop working so they are not as useful). Now I am a trubo expert.

Also, learn how to drive with stock power before you turbo.

And no, if you are 18, you don't know how to drive.

 

Not sure where you got that number because there is only a 30 hp drivetrain loss in a miata and if you want to use the optimistic 15% loss people like to throw out there then you are still only looking at 45hp not 75.

 

I usually factor in a 25% loss because I'm not a bench racer and would rather be pleasantly surprised at the dyno then sorely disappointed.

Talking about crank power is stupid anyway, so I guess we shouldn't even confuse OP and teach him the right way to look at power figures from the get go.

aim for 225whp. go from there.

 

The drivetrain loss is closer to 25whp not percent

 

no. its 26whp

 

26whp is closer to 25whp than 25% hp.

Plus the idea that you lose more power to drivetrain losses as the power output increases doesnt quite make any sense.

you really think that your differential cares if you're outputting 200 vs 400 HP through it?

You think it cares so much that's there's a 100hp loss when there's more power trying to spin it? But only a 50hp loss when there's not quite so much power turning it?

Honestly, that doesnt make sense. Loss is loss, it's not a percentage of the power output.

You're suggesting that Soviet's motor makes 535BHP and it only can't produce that much to the wheels because his drivetrain is overwhelmed. His car must be hella hot when he drives it; the transmission and differential is probably glowing red from outputting 135HP as heat energy.

 

In before nitrodann switches over to carbs.

 

Ok well sorry for the "dumb" questions/confusion. And ill be sure to read up on the build threads to narrow down what exactly i need. thanks for the tips

 

if i dont live till then it will be because of my buddies 500+ hp mustang.. Not my 140 hp miata