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Old 07-21-2008, 01:02 PM   #21
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Originally Posted by KPLAFIN View Post
Well I'm worried about where the power is going to come in at. There is a slight chance that if it's too big it may hurt low-end or even throttle response, but it should most definetely help with top end and i would assume bottom end as well. I don't think slapping car on the dyno should be a big deal for a company like m-tuned.
I know what you mean, but there are just too many variable.
I doubt a bigger tb will hurt low end, it's not like it is 5 times bigger, it's about a 30% increase, it is really only opening up a bottleneck, that's all.

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Sorry Brain...the screws being secure comment had to be made, suprised noone said it sooner.
That's because people fear the banstick, I see you are a brave one, too brave considering you have already had to sit out once.
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Old 07-21-2008, 01:15 PM   #22
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Originally Posted by ArtieParty View Post
Paul changed his TB and intake manifold on the "machine" and he saw a 30 hp gain. Idle was and is completely fine. He put on the BEGi intake manifold with the 70mm TB.
Chad told me that Paul doesnt use IAC anymore. Find out from him if he still has his IAC in place.
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Old 07-21-2008, 01:18 PM   #23
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Great to see some interest. I was off from my real job last week and visited the CNC guy with John on Thursday. The CNC guy is quite interested in making them and they are probably going to start with a non Miata market item first. After those will probably be the Miata T-Bodies.
What size if the Manifold inlet on the NB? It won't do much good past that diameter.
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Old 07-21-2008, 01:21 PM   #24
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Chad told me that Paul doesnt use IAC anymore. Find out from him if he still has his IAC in place.
Ill find out from him later. He's at work now and his phone is busted. He can't view anything on the screen. Either way though, his car idles fine. Would the IAC unhooked throw a CEL in OBDII cars?
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Old 07-21-2008, 01:28 PM   #25
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What size if the Manifold inlet on the NB? It won't do much good past that diameter.
Port it out
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Old 07-21-2008, 01:39 PM   #26
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Originally Posted by [email protected] View Post
Great to see some interest. I was off from my real job last week and visited the CNC guy with John on Thursday. The CNC guy is quite interested in making them and they are probably going to start with a non Miata market item first. After those will probably be the Miata T-Bodies.
So what type of time frame do you think we are realistically looking at for them to be available?
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Old 07-21-2008, 01:47 PM   #27
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Winter is my best guess right now...
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Old 07-21-2008, 02:08 PM   #28
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why don't you make a coolant flange for the back of the head that has a port for the sensor and the heater core? That's something we can't seem to get put together.

Actually, please make one. I'll pay yesterday if its a reasonable price.
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Old 07-21-2008, 02:12 PM   #29
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My $.02.

Speaking of gains in general without testing should probably be shown by an amount of horsepower expressed in a percentage of current horsepower. Throwing a large throttlebody on a 6psi 150whp car and getting 30more whp is a lot different than making an extra 30whp on top of 300whp @18psi.

There would need to be some testing with a couple of different common setups. I'd like to see it on a bandaid setup and on a standalone.
8psi T25
10psi GT25
14psi big GT25
15-18psi GT28
18-20psi+ GT30

If you could make 5% on the lower boost setups and 10% on the higher boost setups, it would be a cost effective upgrade at $250... providing there was also the same rate improvement in spool/response... or at least something measurable.

Going from a 2.5" to a 3" exhaust is worth about 10% and you're going to pay about $400 for that... so I'd definitely be "in".

It would also need to be completely PnP on the stock intake manifold, stock IAC, stock throttle cable, etc...

I have one question. How large is the actual inlet on the intake manifold. If the new TB is larger than the opening, then some porting/smoothing of the IM opening would be ideal as well.

Again, my $.02.
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Old 07-21-2008, 02:31 PM   #30
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Originally Posted by hustler View Post
why don't you make a coolant flange for the back of the head that has a port for the sensor and the heater core? That's something we can't seem to get put together.

Actually, please make one. I'll pay yesterday if its a reasonable price.
Off topic, but we have a coolant reroute kit coming and will probably sell some of our pieces separate. We are building a new housing for the rear from Billet Aluminum. All our Billet projects are usually built in quantities of 150+ so we will have lots of them. Making small 10+ runs is not cost effective = EXPENSIVE!
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Old 07-22-2008, 10:40 AM   #31
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The stock ford v8 tbs are used a lot on other cars as an upgrade route (boosted mx6/FE guys are using them). Wondering if an adapter kit is not a less expensive alternative... The plate should be simple, the real hurdle would be PnP idle control. Would that (plate and harness) cost more that a used tb and a "kit"? And it would leave the buyer open to choosing the size TB they wanted. The 65mm 5.0 TBs usually sell for around $30 used with variable TPS and air control valve.
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Old 07-22-2008, 11:48 AM   #32
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Right. Mustang TB's are dirt cheap.

I have no problem buying a good part, but when the chinese mustang TB's are sssooo cheap in comparison it'll get a little hard to sell.
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Old 08-17-2008, 04:37 PM   #33
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Originally Posted by TurboTim View Post
Right. Mustang TB's are dirt cheap.

I have no problem buying a good part, but when the chinese mustang TB's are sssooo cheap in comparison it'll get a little hard to sell.

Mustang TB are not that cheap. By that I mean the $30 price indicated above is not common. You may find an occasional used 65 mm mustang TB because not many people want them. Most upgrade to a 70 or bigger. New Ford 65 mm TB stil run around $150ish
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