Bigger Throttle Body for 1.6L?
I dont know if this has been discussed here, I could not find anything on it. But since im upgrading the 1.6L intake manifold to the begi, can you change your throttle body? Has anyone ever upgraded theres to a bigger one for more air flow? I havent really seen any except for on ebay...Braineack i know you did your own intake manifold did you upgrade your throttle body, is there a bigger one out there for the 1.6 that works? Thanks, Mike.
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If you're running a full standalone ECU, you can essentially run any throttlebody you want. I think the BEGI ones can be used with a Ford Mustang TB.
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What year 2005+ from the 4.6L? Or what would you say to something like this...80MM THROTTLE BODY UNIVERSAL MAZDA MIATA MX-5 RX7 RX8 : eBay Motors (item 270484870851 end time Feb-11-10 17:39:31 PST)
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Originally Posted by stranges12712
(Post 519907)
What year 2005+ from the 4.6L? Or what would you say to something like this...80MM THROTTLE BODY UNIVERSAL MAZDA MIATA MX-5 RX7 RX8 : eBay Motors (item 270484870851 end time Feb-11-10 17:39:31 PST)
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dont use a mustang TB. Look at Honda or Nissan ones. A honda B series is 10mm larger than our and can be found for $10 with TPS and Idle valves included.
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dont use a mustang TB. Look at Honda or Nissan ones. A honda B series is 10mm larger than our and can be found for $10 with TPS and Idle valves included. |
Originally Posted by Jeff_Ciesielski
(Post 520078)
VQ throttle body FTMFW. You can find them for 50ish bucks on ebay with tps attached. IIRC its the biggest OE throttle body produced.
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Originally Posted by johnmatt
(Post 520083)
But if you go TOO big aren't you kindof hurting yourself?
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Originally Posted by johnmatt
(Post 520083)
But if you go TOO big aren't you kindof hurting yourself?
EDIT: I'd like to point out that I was mistaken. The car I drove had a VH45 throttle body, not a VQ35 throttle body ( damn nissan with their V's Q's and G's :) ) |
Originally Posted by Jeff_Ciesielski
(Post 520091)
I don't see how (*waits for the engineer smackdown*). The way I see it in a turbocharged application, any restriction that you can remove from the charge pipes is an improvement. The only criticism I've ever heard is that that large of a TB is like an ON/OFF switch, and I can tell you from personal experience that that just isn't the case. The car I drove had excellent street manners with an aftermarket IM and a VQ throttle body.
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Originally Posted by dustinb
(Post 520095)
It's my understanding that by going to large in your charge pipes and intercooler that you experience pressure drop and can actually lose power.
In a small turbo/lower boost scenario, if you go *TOO* big, you can lose power, However once you start flowing more air from the turbo than the given TB can support it becomes worth it --STOLEN FROM VWVORTEX-- HORSEPOWER / correctedhp BOOST : Wastegate pressure - 17PSI 80mm: = 388.9 hp @ 7300 rpm 75mm: = 390 hp @ ? 70mm: = 383 hp @ 7200 rpm 65mm: = 378 hp @ 6500 rpm 60mm: = 374 hp @ 6700 rpm BOOST - 22SI 80mm: = 451 @ 6700 rpm 75mm: = 447 hp @ ? 70mm: = 447 hp @ 6700 rpm 65mm: = 430 hp @ 6800 rpm 60mm: = 439 hp @ 6800 rpm STOCK AWP Manifold + 60mm: = 421 hp @ 7100 rpm TORQUE / lb-ft BOOST : Wastegate pressure - 17PSI 80mm: = 322 lb-ft @ 5600 rpm 75mm: = 333 lb-ft @ ? 70mm: = 318 lb-ft @ 5600 rpm 65mm: = 320 lb-ft @ 5800 rpm 60mm: = 312 lb-ft @ 5700 rpm BOOST - 22SI 80mm: = 380 lb-ft @ 5500 rpm 75mm: = 382 lb-ft @ ? 70mm: = 374 lb-ft @ 5600 rpm 65mm: = 369 lb-ft @ 5600 rpm 60mm: = 371 lb-ft @ 5600 rpm STOCK AWP Manifold + 60mm: = 365 lb-ft @ 5100 rpm --END HIJACKED CONTENT-- The question is, where is that happy medium for the miata? I think Brain is most likely right with the Honda B-Series TB. 10mm over stock would probably see reasonable gains (esp. for the price) without being too big and causing torque loss due to lower pressure. |
What size is the stock TB anyways?
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Originally Posted by johnmatt
(Post 520103)
What size is the stock TB anyways?
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I thought it was 52mm, but have yet to whip out the calipers...should have done it last night.
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Originally Posted by gospeed81
(Post 520120)
I thought it was 52mm, but have yet to whip out the calipers...should have done it last night.
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Originally Posted by Jeff_Ciesielski
(Post 520117)
On a 1.6 I believe it is ~60mm.
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[threadjack]
Is porting the stock TB not an option for anybody? What TB is the easiest to try and make compatible with our intake's and TPS? Im currently looking into having someone make me a manifold, (1.8, any takers?) and I was curious about TB size, I currently have 2.5" charge piping and believe about a 60mm or maybe even 65 would be in order to see some power gains? Any real substantial evidence out here to support the "larger TB bore=more power" notion for these cars? Again this question is about 1.8s [/threadjack] |
you could send your TB to maxbore.com
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