Project 200whp N/A
07-23-2015, 04:52 PM
#261
SADFab Destructive Testing Engineer
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</p><p>Gracias</p>
Car is already painted yellow. That wont change. Displacement calculator Interactive Engine Displacement Calculator Program
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07-23-2015, 05:36 PM
#262
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That pic makes me wish I pained my block a dark grey or matte black, it looks super sharp like that.
I see lots of teeth sticking out from behind that damper, still 3 teeth on the intake cam?
I see lots of teeth sticking out from behind that damper, still 3 teeth on the intake cam?
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08-05-2015, 12:32 AM
#267
ʎpunq qoq
Join Date: Jan 2014
Location: Western Australia
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My engine is only around 11.5:1 compression so I'm very interested to see your results.
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08-09-2015, 07:00 PM
#270
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Hopefully you won't consider this going off topic.
So my mickey mouse ITB set-up is 42mm, and from head flange to trumpet the runners are 11" long in an un-opened '01 engine. It makes power out to 7400 at least. No real trade off in torque to a stock VTCS manifold but it takes off after 5700.
Would you consider the 45mm a better option for this engine? Or is 45mm a better choice for an engine that has better breathing capacity?
Have you found the TWM's better than the other's? By better I mean performance wise and by others I mean Jenvey, but Maruha also comes to mind.
Have you had any cars come in with the Club Roadster Special I have which is 20V Silvertops with Techno Toy Tuning manifold? Opinions? Or are ITB's just ITB's as long as you size them right?
Edit: looks like you chose to use the injectors on the head instead of on the TB. Have you found an advantage to having the injector closer?
So my mickey mouse ITB set-up is 42mm, and from head flange to trumpet the runners are 11" long in an un-opened '01 engine. It makes power out to 7400 at least. No real trade off in torque to a stock VTCS manifold but it takes off after 5700.
Would you consider the 45mm a better option for this engine? Or is 45mm a better choice for an engine that has better breathing capacity?
Have you found the TWM's better than the other's? By better I mean performance wise and by others I mean Jenvey, but Maruha also comes to mind.
Have you had any cars come in with the Club Roadster Special I have which is 20V Silvertops with Techno Toy Tuning manifold? Opinions? Or are ITB's just ITB's as long as you size them right?
Edit: looks like you chose to use the injectors on the head instead of on the TB. Have you found an advantage to having the injector closer?
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08-09-2015, 11:15 PM
#271
Hopefully you won't consider this going off topic.
So my mickey mouse ITB set-up is 42mm, and from head flange to trumpet the runners are 11" long in an un-opened '01 engine. It makes power out to 7400 at least. No real trade off in torque to a stock VTCS manifold but it takes off after 5700.
Would you consider the 45mm a better option for this engine? Or is 45mm a better choice for an engine that has better breathing capacity?
Have you found the TWM's better than the other's? By better I mean performance wise and by others I mean Jenvey, but Maruha also comes to mind.
Have you had any cars come in with the Club Roadster Special I have which is 20V Silvertops with Techno Toy Tuning manifold? Opinions? Or are ITB's just ITB's as long as you size them right?
Edit: looks like you chose to use the injectors on the head instead of on the TB. Have you found an advantage to having the injector closer?
So my mickey mouse ITB set-up is 42mm, and from head flange to trumpet the runners are 11" long in an un-opened '01 engine. It makes power out to 7400 at least. No real trade off in torque to a stock VTCS manifold but it takes off after 5700.
Would you consider the 45mm a better option for this engine? Or is 45mm a better choice for an engine that has better breathing capacity?
Have you found the TWM's better than the other's? By better I mean performance wise and by others I mean Jenvey, but Maruha also comes to mind.
Have you had any cars come in with the Club Roadster Special I have which is 20V Silvertops with Techno Toy Tuning manifold? Opinions? Or are ITB's just ITB's as long as you size them right?
Edit: looks like you chose to use the injectors on the head instead of on the TB. Have you found an advantage to having the injector closer?
Only our second ITB car and on the same set of TWM's. Our experience there is limited so I can't comment on comparisons with other ITB options.
Manifold was adapted from something else so you can ignore those bosses. Port fuel is best location.
Feel free to start a new thread discussing your build so more people will see it and can chime in.
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08-09-2015, 11:37 PM
#272
ʎpunq qoq
Join Date: Jan 2014
Location: Western Australia
Posts: 604
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ITB's require a lot of balance to get them to work right. Small changes in any variable can change the airflow harmonics. The sizing in both diameter and length will greatly affect torque and power at different points in rev range. Also, how well the head flows air will then change all the variables above, so really it entirely depends on the engine and target rev range as to which throttle body sizing and trumpet lengths will work. Even just adding filtration or airboxes changes things. The other issue is a race build like this will be different to a street build as you can pretty much disregard anything below 5000rpm.
Any ITB setup for race will ideally require lots of dyno time tweaking trumpet lengths to figure out the optimal power curve and tune out harmonic dips. Emilio's engine will no doubt need the largest diameter ports due to the flow of the head and large cams but total runner length will depend on the target rev range and whether the aim is for high 7000+ rpm power or more upper mid range power.
In Australia we can't really run longer trumpets due to the brakes getting in the way so if you run ITBs you're pretty much building an engine that will make power to over 8000rpm.
Any ITB setup for race will ideally require lots of dyno time tweaking trumpet lengths to figure out the optimal power curve and tune out harmonic dips. Emilio's engine will no doubt need the largest diameter ports due to the flow of the head and large cams but total runner length will depend on the target rev range and whether the aim is for high 7000+ rpm power or more upper mid range power.
In Australia we can't really run longer trumpets due to the brakes getting in the way so if you run ITBs you're pretty much building an engine that will make power to over 8000rpm.
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08-28-2015, 09:54 PM
#273
IT LIVES!
No dyno yet. Just a rough street tune. SOTP feels like about 190whp. We'll dyno it next week. Gonna autocross it down in San Diego this weekend and see if it ejects anything important. Pulls past 8 like it needs to. 6 x 4.875 gears for all the go kartitude.
Every Miata geek needs to drive a 200whp ITB car at least once.
Every Miata geek needs to drive a 200whp ITB car at least once.
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