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Old 07-26-2010, 10:30 AM   #41
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Do it Jay
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Old 07-26-2010, 01:12 PM   #42
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Quote:
Originally Posted by faeflora View Post
stock vs modified Intake + TB + intake piping makes sense. I'd pay $100 for the comparison. That would be worth the r&d time to me. Preferably on a larger frame higher boost setup like yours.
Too bad it would cost me much more than $100 to do this. Perhaps you should try and do this for that amount. When I finally get one of these manifolds I'll see what I can do, but it won't be for quite awhile.
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Old 07-26-2010, 02:53 PM   #43
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Wow, lots going on here.
The very simple point to my post was that I believe the OP can have his turbo spool up much quicker that it is in that plot.

As for my mountain shaped TQ curve, well, thats how it is. That is with a gutted 99 intake manifold. The TQ drops pretty quickly, but the HP continues much better than it did witht he IM in stock form. I gained about 1000rpm more or usable hp.
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Old 07-29-2010, 10:14 PM   #44
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theres lots more to be had from that engine, thats for sure, my "laggy" 3076 goes to almost peak tq, at just over 4k, and stays in that area for a long time.

we used engine analyzer pro to help with the design of the inlet manifold, to match the rest of the setup of the engine, and driveability is excellent. It also lacks the "diesel" powerband some engines seem to have, with just a small window where the engine is working properly. smooth gradually increase in power to the point where the cams will let go.

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Old 07-29-2010, 10:20 PM   #45
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I like how the wastegate is opening right at 5252, haha
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Old 07-30-2010, 12:25 AM   #46
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Originally Posted by hf-mx5t View Post
theres lots more to be had from that engine, thats for sure, my "laggy" 3076 goes to almost peak tq, at just over 4k, and stays in that area for a long time.

we used engine analyzer pro to help with the design of the inlet manifold, to match the rest of the setup of the engine, and driveability is excellent. It also lacks the "diesel" powerband some engines seem to have, with just a small window where the engine is working properly. smooth gradually increase in power to the point where the cams will let go.

<img src="huge dyno pic I won't waste a page with" />
That is a beautiful torque curve, it's flat but it even increases slightly. I imagine your acceleration is at a near constant rate. I aspire to match such beauty! How is throttle response though with such a big turbo?
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Old 07-30-2010, 08:21 AM   #47
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throttle response is wicked and it feels like a linear pull from 3k rpm to 7500.
modulating throttle mid corner is easy, and the power is almost instant.
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Old 07-30-2010, 09:04 AM   #48
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I just noticed I was looking at the red/blue instead of the yellow/orange. either way, both are good torque curves and I agree with you on that "diesel" nonsense everyone seems to have. Do you have any pictures of your manifold? or if willing to disclose, some of the "design specs" of the manifold
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Old 07-30-2010, 09:51 AM   #49
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with the 2871R 0.86 on my 1.6L there is very minimal lag. the power is high enough all the way from 3500-ign cut that you RIP through the gears.

but i need a 6 speed and rods to go more hp than i have now.
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Old 07-30-2010, 04:51 PM   #50
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Old 07-30-2010, 05:01 PM   #51
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Quote:
Originally Posted by NickC View Post
but your (turns101) torque curve doesn't look too much better than his (wes65).
115 and 140 ft-lbs @ 3500 and 4000 RPM respectively

vs

180 and 250 ft-lbs


BIIIIIG difference.

Something's wrong with wes65's setup. Leaking piping / BOV perhaps causing ultra slow spool.
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Old 07-31-2010, 07:41 AM   #52
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Quote:
Originally Posted by JasonC SBB View Post
115 and 140 ft-lbs @ 3500 and 4000 RPM respectively

vs

180 and 250 ft-lbs


BIIIIIG difference.

Something's wrong with wes65's setup. Leaking piping / BOV perhaps causing ultra slow spool.
3in flow master chambered muffler. ive told him about it before, but he likes the sound. there are a few other thing i suggested to him, like intake manifold and new rear end gears, but he is talking about selling the car so i dont think he is too concerned with those issues. sucks cus its a damn quick car. it made me want a miata 2 years ago when i met wes and did some street tuning for him. ill be sad to see him sell his car.
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Old 07-31-2010, 10:21 AM   #53
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Quote:
Originally Posted by faeflora View Post
Damn guys quit gangbanging the frikken intake manifold wagon. There are lots of 350+ hp miatas out there with stock intake manis.
I did it over 8 years ago. I also tried a BEGi and Modified Honda and they did make more power at the top.

350hp on a Miata Motor is very easy and a simple receipe... Here it is...

720cc or bigger injectors
HIgh Flow Fuel Rail
Forged Rods
Stock 94-97 Pistons
T3/T4 50 Trim Turbo, or GT3071 Turbo
Good External Wastegate
3" Downpipe to 3" Exhaust with 200 Cell Cat.
Standalone Tune by someone who knows what they are doing.
18-20psi of Boost.

Voila.. 350hp!

Thanks, Marc
M-Tuned.com
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Old 07-31-2010, 10:24 AM   #54
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Quote:
Originally Posted by faeflora View Post
Ok this is the **** that bugs me. Just because everyone thinks a part is better doesn't mean that it is better part. What's missing is the quantification. That is the distinction between theory and practice right? And since we're spending our $ on it we should take the time to find out what the specific improvements are (if any).

I will paypal anyone who has a NB mani the $ for a back to back dyno on the hybrid and stock mani, with fueling adjust for the same AFR targets
I can test it on my GT2560 @ 10 psi setup, but it will have to wait a few months until I have some time. I'm getting married in 2 weeks and going away for almost a month.

We have a dyno in house..

Marc
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Old 07-31-2010, 01:54 PM   #55
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Marc, what octane?
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Old 07-31-2010, 03:50 PM   #56
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Quote:
Originally Posted by [email protected] View Post
I did it over 8 years ago. I also tried a BEGi and Modified Honda and they did make more power at the top.

350hp on a Miata Motor is very easy and a simple receipe... Here it is...

720cc or bigger injectors
HIgh Flow Fuel Rail
Forged Rods
Stock 94-97 Pistons
T3/T4 50 Trim Turbo, or GT3071 Turbo
Good External Wastegate
3" Downpipe to 3" Exhaust with 200 Cell Cat.
Standalone Tune by someone who knows what they are doing.
18-20psi of Boost.

Voila.. 350hp!

Thanks, Marc
M-Tuned.com
Are the stock 94-97 pistons really good for 350 whp?

What would your list look like if the goal was at least 400 whp?
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