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Old 02-20-2007, 03:25 AM   #21
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Originally Posted by Al Hounos View Post
Damn savington you're making it sound like an incredible ordeal. I'd like to add water injection, knock sensor, 650cc injectors and a bigger turbo and shoot for 300whp on my 1.6. I'm pretty positive it's been done before.

Just don't beat the crap out of your drivetrain.
It's definitely doable, I never said getting to 300rwhp was difficult. Getting a RELIABLE 300rwhp is the difficult part. Water injection certainly makes that a lot easier. IMO, I want to be able to take my car to the track or to a dragstrip every so often and really beat the crap out of it without worrying about whether the transmission will hold it. If I were shooting for 300rwhp, I'd probably go to a 6-speed and a TII diff just to be certain.

You don't HAVE to spend big bucks to get there, but if you want to be there for a long time, you'll have to do it eventually.
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Old 02-20-2007, 09:51 AM   #22
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The differential is NOT the part that breaks, it is the ring gear and the pinion.
I understand that. I was referring to the entire unit generically, when I said differential. That said, I bet you won't find enough folks that've blown the 7" diffs. to know what typically breaks inside of them, be it ring, pinion or spider gears.

That's because you'll break your half-shafts/axles before the 7" diff.

Just a reminder (and I'm often guilty of this myself, as I, too, get caught up in the horsepower figure): It's torque that kills the tranny, half-shafts and diffs., not horsepower.
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Old 02-20-2007, 09:58 AM   #23
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I'd ask AndyFloyd what it cost to get 300. I think he's done it about as economically as anybody- at least on the engine build. Just pistons with with GTX rods and it keeps going like the energizer bunny.
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Old 02-20-2007, 10:37 AM   #24
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Bigger turbo, more boost, good tune. The '94 1.8 is the best stock motor to do it on. A torsen is fine at 300 whp. Nobody's breaking ring&pinions on the torsen. Your axle will go first if you're launching on a sticky track.

ak47bravo,
The reason you were pinging and overheating at 14 psi is because the GT2560 is just making hot air at that boost level. It's maxxed out pretty much. An EWG will give you some more efficiency but the compressor is still too small.

Frank
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Old 02-20-2007, 10:37 AM   #25
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... Can take it to its limits pretty easy with out feeling scared of the car...
Something is wrong, if you don't feel scared of your car you better not drive it or you'll kill youself pretty much easy. You have to have some respect for your car.

I'm building a 1.8l '99 Miata and shooting for around 380-420whp and around 250whp for the streets at all times and just switch between.

IDK what you would have to change - the things others told you about are the ones.
I'm putting in forged Wiseco pistons, Crower rods, ARP head and main cap studs, SC50 turbo (I'll see how this handles and maybe upgrade to a SC61 later if this one will spool fast), MS-I v3.0, T-II Tranny, Diff, hubs, 3" SS exhaust, Egual Length Runner exhaust manifold, dual feed fuel rail, Custom intake (later), 255lph Walbro FP, 780ccm injectors, alcohol injection.

...you always have to be a little scared of your car just to keep yourself safer.
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Old 02-20-2007, 10:47 AM   #26
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It's so much harder to hit that 300 number that IMO until I have a ton of cash to really do it right (2.0 stroker, GT3071, lots of boost, racegas, etc.) it's not worth it. Stock will support 220 forever, but the stuff that's required to hit 300 will support 330, 350+. Consider that.
I think that's a real misconception.

93 octane
1.8 motor with stock head and intake
9:1 compression
$200 cheap chinese turbo
Stock transmission (yes, my '99 came with a 6 speed because my car was painted blue at the factory.)
Stock Torsen

296 RWHP @ 17 PSI
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Old 02-20-2007, 11:19 AM   #27
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rods/pistons and a decent turbo with supporting fuel should get you 300rwhp easily.

I've never really heard anybody breaking the 7" Torsen yet, its pretty damn tough unlike the rear in the 1.6 cars.
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Old 02-20-2007, 11:41 AM   #28
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"Something is wrong, if you don't feel scared of your car you better not drive it or you'll kill youself pretty much easy. You have to have some respect for your car."
^
^
Well I'm just pretty used to the speed of the car, still will get me a little bit sometimes though. Only car I've driven that really scared me, is my friends 350z. 3000 lbs. @ 535 whp.

Only problem is if I go with a bigger turbo, won't I need a new Exhaust manifold?
I guess I could try to pick one up from BEGI. Could a DO WI tie in with the link ECU? I was talking to a friend and he was saying that with my new radiator I'm getting plus maybe pistons and DO WI, I really wouldn't have a problem getting to about 300 whp.
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Old 02-20-2007, 12:21 PM   #29
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your turbo is called the GT3071R. swaps straight in. but i'd think your FM downpipe will become a restriction at that point.
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Old 02-20-2007, 12:55 PM   #30
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AK WI wil help you a ton since you have the link and already have fueling sorted i see no reason why 300whp on stock motor cant last for a while till you get the $ for some pistons and rings etc. I know what you mean about the car is predictable but sometimes we can get used to power that is why i keep a slow vehicle around to recalibrate my *** dyno from time to time.
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Old 02-20-2007, 01:38 PM   #31
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Yeah, folks have run in the 300-325rwhp neighborhood on stock pistons/rods, and I'd wager that it'd last quite a while with water-injection.

Jeremy at FM said he felt there would be accelerated piston rings wear, so that may not be helped any by water-injection.
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Old 02-20-2007, 02:00 PM   #32
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Originally Posted by Al Hounos View Post
your turbo is called the GT3071R. swaps straight in. but i'd think your FM downpipe will become a restriction at that point.
The 2.5 DP is not a restriction if he goes EWG and dumps to atmosphere.

Frank
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Old 02-20-2007, 02:33 PM   #33
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maybe true, but that would mean a new manifold.
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Old 02-20-2007, 02:38 PM   #34
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As soon as I can get my car back together, I will probably shoot for 275-300 at the wheels, that will be on all stock internals, external gate and a T04E.
-Michael-
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Old 02-20-2007, 03:14 PM   #35
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Originally Posted by Al Hounos View Post
maybe true, but that would mean a new manifold.
I could swear that Bell had an adapter that bolted between the turbo and mani that allowed for an EWG.

Something like this:



Space would be an issue though.

Frank
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Old 02-20-2007, 06:54 PM   #36
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Lol, jesus doug. Calm down and spend money on your suspension, its so ******* shitty hahahaha.

And get the bodywork done on it, spend money on other parts of the car.... so i can catch up haha.
(i got my 1.8 injectors today )

Or buy a bike, haha.
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Old 02-20-2007, 07:50 PM   #37
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Quote:
Originally Posted by ak47bravo View Post
"Something is wrong, if you don't feel scared of your car you better not drive it or you'll kill youself pretty much easy. You have to have some respect for your car."
^
^
Well I'm just pretty used to the speed of the car, still will get me a little bit sometimes though. Only car I've driven that really scared me, is my friends 350z. 3000 lbs. @ 535 whp.

Only problem is if I go with a bigger turbo, won't I need a new Exhaust manifold?
I guess I could try to pick one up from BEGI. Could a DO WI tie in with the link ECU? I was talking to a friend and he was saying that with my new radiator I'm getting plus maybe pistons and DO WI, I really wouldn't have a problem getting to about 300 whp.
were do you stay? we should talk some time. I know you are close to Sugarland and so am I. So is my friend with an MSM.

I've had a turbo miata and hes had everything from a turbo celica to a turbo miata...
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Old 02-20-2007, 11:02 PM   #38
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Originally Posted by Fireindc View Post
Lol, jesus doug. Calm down and spend money on your suspension, its so ******* shitty hahahaha.

And get the bodywork done on it, spend money on other parts of the car.... so i can catch up haha.
(i got my 1.8 injectors today )

Or buy a bike, haha.
Haha susp. isn't to bad. Just trying to get the real big stuff out of the way while I have the time and money, cause I know next year theres no way I can do any major mods.

I'm in First Colony Pitlab. Where exactly are you?
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Old 02-21-2007, 12:19 AM   #39
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Originally Posted by fmowry View Post
Bigger turbo, more boost, good tune. The '94 1.8 is the best stock motor to do it on. A torsen is fine at 300 whp. Nobody's breaking ring&pinions on the torsen. Your axle will go first if you're launching on a sticky track.

ak47bravo,
The reason you were pinging and overheating at 14 psi is because the GT2560 is just making hot air at that boost level. It's maxxed out pretty much. An EWG will give you some more efficiency but the compressor is still too small.

Frank
this guy is running 20 psi on a gt2560 http://www.sdsefi.com/features/july03miata.htm
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Old 02-21-2007, 12:27 AM   #40
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Quote:
Originally Posted by ak47bravo View Post
Haha susp. isn't to bad. Just trying to get the real big stuff out of the way while I have the time and money, cause I know next year theres no way I can do any major mods.

I'm in First Colony Pitlab. Where exactly are you?

hwy 6 and beechnut. My friend is like 5 min closer to hwy 99
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